使用SpringBoot和Seata實現Dubbo分佈式事務管理

原創 请叫我东子 2019-09-06 01:47

1.簡介

本文主要介紹SpringBoot2.1.5 + Dubbo 2.7.3 + Mybatis 3.4.2 + Nacos 1.1.3 +Seata 0.8.0整合來實現Dubbo分佈式事務管理，使用Nacos 作爲 Dubbo和Seata的註冊中心和配置中心,使用 MySQL 數據庫和 MyBatis來操作數據。

如果你還對SpringBoot、Dubbo、Nacos、Seata、Mybatis 不是很瞭解的話，這裏我爲大家整理個它們的官網網站，如下

在這裏我們就不一個一個介紹它們是怎麼使用和原理，詳細請學習官方文檔，在這裏我將開始對它們進行整合，完成一個簡單的案例，來讓大家瞭解Seata來實現Dubbo分佈式事務管理的基本流程。

2.環境準備

2.1 下載nacos並安裝啓動

nacos下載：https://github.com/alibaba/nacos/releases/tag/1.1.3

Nacos 快速入門：https://nacos.io/en-us/docs/quick-start.html

sh startup.sh -m standalone

在瀏覽器打開Nacos web 控制檯：http://192.168.10.200:8848/nacos/index.html

輸入nacos的賬號和密碼 分別爲nacos：nacos

在這裏插入圖片描述
這是後naocs 就正常啓動了。

2.2 下載seata0.8.0 並安裝啓動

2.2.1 在 Seata Release 下載最新版的 Seata Server 並解壓得到如下目錄：

.
├──bin
├──conf
├──file_store
└──lib

2.2.2 修改 conf/registry.conf 配置，

目前seata支持如下的file、nacos 、apollo、zk、consul的註冊中心和配置中心。這裏我們以nacos 爲例。
將 type 改爲 nacos

registry {
  # file nacos
  type = "nacos"

  nacos {
    serverAddr = "192.168.10.200"
    namespace = "public"
    cluster = "default"
  }
  file {
    name = "file.conf"
  }
}

config {
  # file、nacos 、apollo、zk、consul
  type = "nacos"

  nacos {
    serverAddr = "192.168.10.200"
    namespace = "public"
    cluster = "default"
  }

  file {
    name = "file.conf"
  }
}
  • serverAddr = “192.168.10.200” ：nacos 的地址
  • namespace = “public” ：nacos的命名空間默認爲public
  • cluster = “default” ：集羣設置未默認 default

2.2.3 修改 conf/nacos-config.txt配置

transport.type=TCP
transport.server=NIO
transport.heartbeat=true
transport.thread-factory.boss-thread-prefix=NettyBoss
transport.thread-factory.worker-thread-prefix=NettyServerNIOWorker
transport.thread-factory.server-executor-thread-prefix=NettyServerBizHandler
transport.thread-factory.share-boss-worker=false
transport.thread-factory.client-selector-thread-prefix=NettyClientSelector
transport.thread-factory.client-selector-thread-size=1
transport.thread-factory.client-worker-thread-prefix=NettyClientWorkerThread
transport.thread-factory.boss-thread-size=1
transport.thread-factory.worker-thread-size=8
transport.shutdown.wait=3
service.vgroup_mapping.order-service-seata-service-group=default
service.vgroup_mapping.account-service-seata-service-group=default
service.vgroup_mapping.storage-service-seata-service-group=default
service.vgroup_mapping.business-service-seata-service-group=default
service.enableDegrade=false
service.disable=false
service.max.commit.retry.timeout=-1
service.max.rollback.retry.timeout=-1
client.async.commit.buffer.limit=10000
client.lock.retry.internal=10
client.lock.retry.times=30
store.mode=db
store.file.dir=file_store/data
store.file.max-branch-session-size=16384
store.file.max-global-session-size=512
store.file.file-write-buffer-cache-size=16384
store.file.flush-disk-mode=async
store.file.session.reload.read_size=100
store.db.driver-class-name=com.mysql.jdbc.Driver
store.db.datasource=dbcp
store.db.db-type=mysql
store.db.url=jdbc:mysql://192.168.10.200:3306/seata?useUnicode=true
store.db.user=lidong
store.db.password=cwj887766@@
store.db.min-conn=1
store.db.max-conn=3
store.db.global.table=global_table
store.db.branch.table=branch_table
store.db.query-limit=100
store.db.lock-table=lock_table
recovery.committing-retry-period=1000
recovery.asyn-committing-retry-period=1000
recovery.rollbacking-retry-period=1000
recovery.timeout-retry-period=1000
transaction.undo.data.validation=true
transaction.undo.log.serialization=jackson
transaction.undo.log.save.days=7
transaction.undo.log.delete.period=86400000
transaction.undo.log.table=undo_log
transport.serialization=seata
transport.compressor=none
metrics.enabled=false
metrics.registry-type=compact
metrics.exporter-list=prometheus
metrics.exporter-prometheus-port=9898

這裏主要修改瞭如下幾項：

  • store.mode :存儲模式 默認file 這裏我修改爲db 模式 ，並且需要兩個表global_table和branch_table
  • store.db.driver-class-name： 默認沒有，會報錯。添加了 com.mysql.jdbc.Driver
  • store.db.datasource=dbcp ：數據源 dbcp
  • store.db.db-type=mysql : 存儲數據庫的類型爲mysql
  • store.db.url=jdbc:mysql://192.168.10.200:3306/seata?useUnicode=true : 修改爲自己的數據庫url、port、數據庫名稱
  • store.db.user=lidong :數據庫的賬號
  • store.db.password=cwj887766@@ :數據庫的密碼
  • service.vgroup_mapping.order-service-seata-service-group=default
  • service.vgroup_mapping.account-service-seata-service-group=default
  • service.vgroup_mapping.storage-service-seata-service-group=default
  • service.vgroup_mapping.business-service-seata-service-group=default

也可以在 Nacos 配置頁面添加，data-id 爲 service.vgroup_mapping.${YOUR_SERVICE_NAME}-seata-service-group, group 爲 SEATA_GROUP， 如果不添加該配置，啓動後會提示no available server to connect

注意： 配置文件末尾有空行，需要刪除，否則會提示失敗，儘管實際上是成功的

global_table的表結構

CREATE TABLE `global_table` (
  `xid` varchar(128) NOT NULL,
  `transaction_id` bigint(20) DEFAULT NULL,
  `status` tinyint(4) NOT NULL,
  `application_id` varchar(64) DEFAULT NULL,
  `transaction_service_group` varchar(64) DEFAULT NULL,
  `transaction_name` varchar(64) DEFAULT NULL,
  `timeout` int(11) DEFAULT NULL,
  `begin_time` bigint(20) DEFAULT NULL,
  `application_data` varchar(2000) DEFAULT NULL,
  `gmt_create` datetime DEFAULT NULL,
  `gmt_modified` datetime DEFAULT NULL,
  PRIMARY KEY (`xid`),
  KEY `idx_gmt_modified_status` (`gmt_modified`,`status`),
  KEY `idx_transaction_id` (`transaction_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

branch_table的表結構

CREATE TABLE `branch_table` (
  `branch_id` bigint(20) NOT NULL,
  `xid` varchar(128) NOT NULL,
  `transaction_id` bigint(20) DEFAULT NULL,
  `resource_group_id` varchar(32) DEFAULT NULL,
  `resource_id` varchar(256) DEFAULT NULL,
  `lock_key` varchar(128) DEFAULT NULL,
  `branch_type` varchar(8) DEFAULT NULL,
  `status` tinyint(4) DEFAULT NULL,
  `client_id` varchar(64) DEFAULT NULL,
  `application_data` varchar(2000) DEFAULT NULL,
  `gmt_create` datetime DEFAULT NULL,
  `gmt_modified` datetime DEFAULT NULL,
  PRIMARY KEY (`branch_id`),
  KEY `idx_xid` (`xid`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

2.2.4 將 Seata 配置添加到 Nacos 中

使用命令如下

cd conf
sh nacos-config.sh localhost

成功後會提示

init nacos config finished, please start seata-server

在 Nacos 管理頁面應該可以看到有 59 個 Group 爲SEATA_GROUP的配置

在這裏插入圖片描述

2.2.5 啓動 Seata Server

使用db 模式啓動

 cd ..
 sh ./bin/seata-server.sh

這時候在 Nacos 的服務列表下面可以看到一個名爲serverAddr的服務
在這裏插入圖片描述

3 案例分析

參考官網中用戶購買商品的業務邏輯。整個業務邏輯由4個微服務提供支持：

  • 庫存服務：扣除給定商品的存儲數量。
  • 訂單服務：根據購買請求創建訂單。
  • 帳戶服務：借記用戶帳戶的餘額。
  • 業務服務：處理業務邏輯。

請求邏輯架構
在這裏插入圖片描述

3.1 github地址

springboot-dubbo-seata：https://github.com/lidong1665/springboot-dubbo-seata

  • samples-common ：公共模塊

  • samples-account ：用戶賬號模塊

  • samples-order ：訂單模塊

  • samples-storage ：庫存模塊

  • samples-business ：業務模塊

3.2 賬戶服務：AccountDubboService

/**
 * @Author: lidong
 * @Description  賬戶服務接口
 * @Date Created in 2019/9/5 16:37
 */
public interface AccountDubboService {

    /**
     * 從賬戶扣錢
     */
    ObjectResponse decreaseAccount(AccountDTO accountDTO);
}

3.3 訂單服務：OrderDubboService

/**
 * @Author: lidong
 * @Description  訂單服務接口
 * @Date Created in 2019/9/5 16:28
 */
public interface OrderDubboService {

    /**
     * 創建訂單
     */
    ObjectResponse<OrderDTO> createOrder(OrderDTO orderDTO);
}

3.4 庫存服務：StorageDubboService

/**
 * @Author: lidong
 * @Description  庫存服務
 * @Date Created in 2019/9/5 16:22
 */
public interface StorageDubboService {

    /**
     * 扣減庫存
     */
    ObjectResponse decreaseStorage(CommodityDTO commodityDTO);
}

3.5 業務服務：BusinessService


/**
 * @Author: lidong
 * @Description
 * @Date Created in 2019/9/5 17:17
 */
public interface BusinessService {

    /**
     * 出處理業務服務
      * @param businessDTO
     * @return
     */
    ObjectResponse handleBusiness(BusinessDTO businessDTO);
}

業務邏輯的具體實現主要體現在 訂單服務的實現和業務服務的實現

訂單服務的實現

@Service
public class TOrderServiceImpl extends ServiceImpl<TOrderMapper, TOrder> implements ITOrderService {

    @Reference(version = "1.0.0")
    private AccountDubboService accountDubboService;

    /**
     * 創建訂單
     * @Param:  OrderDTO  訂單對象
     * @Return:  OrderDTO  訂單對象
     */
    @Override
    public ObjectResponse<OrderDTO> createOrder(OrderDTO orderDTO) {
        ObjectResponse<OrderDTO> response = new ObjectResponse<>();
        //扣減用戶賬戶
        AccountDTO accountDTO = new AccountDTO();
        accountDTO.setUserId(orderDTO.getUserId());
        accountDTO.setAmount(orderDTO.getOrderAmount());
        ObjectResponse objectResponse = accountDubboService.decreaseAccount(accountDTO);

        //生成訂單號
        orderDTO.setOrderNo(UUID.randomUUID().toString().replace("-",""));
        //生成訂單
        TOrder tOrder = new TOrder();
        BeanUtils.copyProperties(orderDTO,tOrder);
        tOrder.setCount(orderDTO.getOrderCount());
        tOrder.setAmount(orderDTO.getOrderAmount().doubleValue());
        try {
            baseMapper.createOrder(tOrder);
        } catch (Exception e) {
            response.setStatus(RspStatusEnum.FAIL.getCode());
            response.setMessage(RspStatusEnum.FAIL.getMessage());
            return response;
        }

        if (objectResponse.getStatus() != 200) {
            response.setStatus(RspStatusEnum.FAIL.getCode());
            response.setMessage(RspStatusEnum.FAIL.getMessage());
            return response;
        }

        response.setStatus(RspStatusEnum.SUCCESS.getCode());
        response.setMessage(RspStatusEnum.SUCCESS.getMessage());
        return response;
    }
}

整個業務的實現邏輯

@Service
@Slf4j
public class BusinessServiceImpl implements BusinessService{

    @Reference(version = "1.0.0")
    private StorageDubboService storageDubboService;

    @Reference(version = "1.0.0")
    private OrderDubboService orderDubboService;

    private boolean flag;

    /**
     * 處理業務邏輯
     * @Param:
     * @Return:
     */

    @GlobalTransactional(timeoutMills = 300000, name = "dubbo-gts-seata-example")
    @Override
    public ObjectResponse handleBusiness(BusinessDTO businessDTO) {
        log.info("開始全局事務，XID = " + RootContext.getXID());
        ObjectResponse<Object> objectResponse = new ObjectResponse<>();
        //1、扣減庫存
        CommodityDTO commodityDTO = new CommodityDTO();
        commodityDTO.setCommodityCode(businessDTO.getCommodityCode());
        commodityDTO.setCount(businessDTO.getCount());
        ObjectResponse storageResponse = storageDubboService.decreaseStorage(commodityDTO);
        //2、創建訂單
        OrderDTO orderDTO = new OrderDTO();
        orderDTO.setUserId(businessDTO.getUserId());
        orderDTO.setCommodityCode(businessDTO.getCommodityCode());
        orderDTO.setOrderCount(businessDTO.getCount());
        orderDTO.setOrderAmount(businessDTO.getAmount());
        ObjectResponse<OrderDTO> response = orderDubboService.createOrder(orderDTO);

        //打開註釋測試事務發生異常後，全局回滾功能
//        if (!flag) {
//            throw new RuntimeException("測試拋異常後，分佈式事務回滾！");
//        }

        if (storageResponse.getStatus() != 200 || response.getStatus() != 200) {
            throw new DefaultException(RspStatusEnum.FAIL);
        }

        objectResponse.setStatus(RspStatusEnum.SUCCESS.getCode());
        objectResponse.setMessage(RspStatusEnum.SUCCESS.getMessage());
        objectResponse.setData(response.getData());
        return objectResponse;
    }
}

3.6 使用seata的分佈式事務解決方案處理dubbo的分佈式事務

在這裏插入圖片描述

我們只需要在業務處理的方法handleBusiness添加一個註解 @GlobalTransactional

@GlobalTransactional(timeoutMills = 300000, name = "dubbo-gts-seata-example")
    @Override
    public ObjectResponse handleBusiness(BusinessDTO businessDTO) {
    
    }
  • timeoutMills: 超時時間
  • name ：事務名稱

3.7 準備數據庫

注意: MySQL必須使用InnoDB engine.

創建數據庫 並導入數據庫腳本

DROP DATABASE IF EXISTS seata;
CREATE DATABASE seata;
USE seata;

DROP TABLE IF EXISTS `t_account`;
CREATE TABLE `t_account` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `user_id` varchar(255) DEFAULT NULL,
  `amount` double(14,2) DEFAULT '0.00',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of t_account
-- ----------------------------
INSERT INTO `t_account` VALUES ('1', '1', '4000.00');

-- ----------------------------
-- Table structure for t_order
-- ----------------------------
DROP TABLE IF EXISTS `t_order`;
CREATE TABLE `t_order` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `order_no` varchar(255) DEFAULT NULL,
  `user_id` varchar(255) DEFAULT NULL,
  `commodity_code` varchar(255) DEFAULT NULL,
  `count` int(11) DEFAULT '0',
  `amount` double(14,2) DEFAULT '0.00',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=64 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of t_order
-- ----------------------------

-- ----------------------------
-- Table structure for t_storage
-- ----------------------------
DROP TABLE IF EXISTS `t_storage`;
CREATE TABLE `t_storage` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `commodity_code` varchar(255) DEFAULT NULL,
  `name` varchar(255) DEFAULT NULL,
  `count` int(11) DEFAULT '0',
  PRIMARY KEY (`id`),
  UNIQUE KEY `commodity_code` (`commodity_code`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of t_storage
-- ----------------------------
INSERT INTO `t_storage` VALUES ('1', 'C201901140001', '水杯', '1000');

-- ----------------------------
-- Table structure for undo_log
-- 注意此處0.3.0+ 增加唯一索引 ux_undo_log
-- ----------------------------
DROP TABLE IF EXISTS `undo_log`;
CREATE TABLE `undo_log` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `branch_id` bigint(20) NOT NULL,
  `xid` varchar(100) NOT NULL,
  `context` varchar(128) NOT NULL,
  `rollback_info` longblob NOT NULL,
  `log_status` int(11) NOT NULL,
  `log_created` datetime NOT NULL,
  `log_modified` datetime NOT NULL,
  `ext` varchar(100) DEFAULT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `ux_undo_log` (`xid`,`branch_id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of undo_log
-- ----------------------------
SET FOREIGN_KEY_CHECKS=1;

會看到如上的4個表

+-------------------------+
| Tables_in_seata         |
+-------------------------+
| t_account               |
| t_order                 |
| t_storage               |
| undo_log                |
+-------------------------+

這裏爲了簡化我將這個三張表創建到一個庫中,使用是三個數據源來實現。

3.8 我們以賬號服務samples-account爲例 ，分析需要注意的配置項目

3.8.1 引入的依賴

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <artifactId>springboot-dubbo-seata</artifactId>
    <packaging>pom</packaging>
    <name>springboot-dubbo-seata</name>
    <groupId>io.seata</groupId>
    <version>1.0.0</version>
    <description>samples-account</description》

    <properties>
        <springboot.verison>2.1.5.RELEASE</springboot.verison>
        <java.version>1.8</java.version>
        <druid.version>1.1.10</druid.version>
        <mybatis.version>1.3.2</mybatis.version>
        <mybatis-plus.version>2.3</mybatis-plus.version>
        <nacos.version>0.2.3</nacos.version>
        <lombok.version>1.16.22</lombok.version>
        <dubbo.version>2.7.3</dubbo.version>
        <nacos-client.verison>1.1.3</nacos-client.verison>
        <seata.version>0.8.0</seata.version>
        <netty.version>4.1.32.Final</netty.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>${springboot.verison}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <version>${springboot.verison}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <version>${springboot.verison}</version>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>${druid.version}</version>
        </dependency>

        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>${mybatis.version}</version>
        </dependency>

        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus</artifactId>
            <version>${mybatis-plus.version}</version>
        </dependency>

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
            <version>${dubbo.version}</version>
            <exclusions>
                <exclusion>
                    <artifactId>spring</artifactId>
                    <groupId>org.springframework</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>${dubbo.version}</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.dubbo/dubbo-config-spring -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-config-spring</artifactId>
            <version>${dubbo.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-registry-nacos</artifactId>
            <version>${dubbo.version}</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/io.seata/seata-all -->
        <dependency>
            <groupId>io.seata</groupId>
            <artifactId>seata-all</artifactId>
            <version>${seata.version}</version>
        </dependency>


        <dependency>
            <groupId>com.alibaba.nacos</groupId>
            <artifactId>nacos-client</artifactId>
            <version>${nacos-client.verison}</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.alibaba.boot/nacos-config-spring-boot-starter -->
        <dependency>
            <groupId>com.alibaba.boot</groupId>
            <artifactId>nacos-config-spring-boot-starter</artifactId>
            <version>${nacos.version}</version>
            <exclusions>
                <exclusion>
                    <artifactId>nacos-client</artifactId>
                    <groupId>com.alibaba.nacos</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <version>${springboot.verison}</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
        </dependency>


        <dependency>
            <groupId>io.netty</groupId>
            <artifactId>netty-all</artifactId>
            <version>${netty.version}</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba.spring</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>1.0.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>
    </dependencies>


    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-deploy-plugin</artifactId>
                <configuration>
                    <skip>true</skip>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

注意：

  • seata-all: 這個是seata 所需的主要依賴
  • dubbo-spring-boot-starter: springboot dubbo的依賴

其他的就不一一介紹，其他的一目瞭然，就知道是幹什麼的。

3.8.2 application.properties配置

server.port=8102
spring.application.name=dubbo-account-example

#====================================Dubbo配置===============================================
dubbo.application.id= dubbo-account-example
dubbo.application.name= dubbo-account-example
dubbo.protocol.id=dubbo
dubbo.protocol.name=dubbo
dubbo.registry.id=dubbo-account-example-registry
dubbo.registry.address=nacos://192.168.10.200:8848
dubbo.protocol.port=20880
dubbo.application.qosEnable=false
dubbo.config-center.address=nacos://192.168.10.200:8848
dubbo.metadata-report.address=nacos://192.168.10.200:8848

#====================================mysql 配置============================================
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://192.168.10.200:3306/seata?useSSL=false&useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true
spring.datasource.username=lidong
spring.datasource.password=cwj887766@@


#=====================================mybatis 配置======================================
mybatis.mapper-locations=classpath*:/mapper/*.xml

3.8.3 registry.conf 配置 （naocs的配置）

registry {
  # file nacos
  type = "nacos"

  nacos {
    serverAddr = "192.168.10.200"
    namespace = "public"
    cluster = "default"
  }
  file {
    name = "file.conf"
  }
}

config {
  # file、nacos 、apollo、zk、consul
  type = "nacos"

  file {
    name = "file.conf"
  }

  nacos {
    serverAddr = "192.168.10.200"
    namespace = "public"
    cluster = "default"
  }
}

3.8.5 SeataAutoConfig 配置

package io.seata.samples.integration.account.config;

import com.alibaba.druid.pool.DruidDataSource;

import io.seata.rm.datasource.DataSourceProxy;
import io.seata.spring.annotation.GlobalTransactionScanner;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.transaction.jdbc.JdbcTransactionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;

/**
 * @Author: llidong
 * @Description  seata global configuration
 * @Date Created in 2019/9/05 10:28
 */
@Configuration
public class SeataAutoConfig {

    /**
     * autowired datasource config
     */
    @Autowired
    private DataSourceProperties dataSourceProperties;

    /**
     * init durid datasource
     *
     * @Return: druidDataSource  datasource instance
     */
    @Bean
    @Primary
    public DruidDataSource druidDataSource(){
        DruidDataSource druidDataSource = new DruidDataSource();
        druidDataSource.setUrl(dataSourceProperties.getUrl());
        druidDataSource.setUsername(dataSourceProperties.getUsername());
        druidDataSource.setPassword(dataSourceProperties.getPassword());
        druidDataSource.setDriverClassName(dataSourceProperties.getDriverClassName());
        druidDataSource.setInitialSize(0);
        druidDataSource.setMaxActive(180);
        druidDataSource.setMaxWait(60000);
        druidDataSource.setMinIdle(0);
        druidDataSource.setValidationQuery("Select 1 from DUAL");
        druidDataSource.setTestOnBorrow(false);
        druidDataSource.setTestOnReturn(false);
        druidDataSource.setTestWhileIdle(true);
        druidDataSource.setTimeBetweenEvictionRunsMillis(60000);
        druidDataSource.setMinEvictableIdleTimeMillis(25200000);
        druidDataSource.setRemoveAbandoned(true);
        druidDataSource.setRemoveAbandonedTimeout(1800);
        druidDataSource.setLogAbandoned(true);
        return druidDataSource;
    }

    /**
     * init datasource proxy
     * @Param: druidDataSource  datasource bean instance
     * @Return: DataSourceProxy  datasource proxy
     */
    @Bean
    public DataSourceProxy dataSourceProxy(DruidDataSource druidDataSource){
        return new DataSourceProxy(druidDataSource);
    }

    /**
     * init mybatis sqlSessionFactory
     * @Param: dataSourceProxy  datasource proxy
     * @Return: DataSourceProxy  datasource proxy
     */
    @Bean
    public SqlSessionFactory sqlSessionFactory(DataSourceProxy dataSourceProxy) throws Exception {
        SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
        factoryBean.setDataSource(dataSourceProxy);
        factoryBean.setMapperLocations(new PathMatchingResourcePatternResolver()
                .getResources("classpath*:/mapper/*.xml"));
        return factoryBean.getObject();
    }

    /**
     * init global transaction scanner
     *
     * @Return: GlobalTransactionScanner
     */
    @Bean
    public GlobalTransactionScanner globalTransactionScanner(){
        return new GlobalTransactionScanner("account-gts-seata-example", "account-service-seata-service-group");
    }
}

其中:

@Bean
    public GlobalTransactionScanner globalTransactionScanner(){
        return new GlobalTransactionScanner("account-gts-seata-example", "account-service-seata-service-group");
    }

GlobalTransactionScanner: 初始化全局的事務掃描器

 /**
     * Instantiates a new Global transaction scanner.
     *
     * @param applicationId  the application id
     * @param txServiceGroup the default server group
     */
    public GlobalTransactionScanner(String applicationId, String txServiceGroup) {
        this(applicationId, txServiceGroup, DEFAULT_MODE);
    }
  • applicationId ：爲應用id 這裏我傳入的是account-gts-seata-example
  • txServiceGroup: 默認server的分組 這裏我傳入的是account-service-seata-service-group 這個和我們前面在nacos 配置的是保存一致。
  • DEFAULT_MODE：默認的事務模式 爲AT_MODE + MT_MODE

3.8.6 AccountExampleApplication 啓動類的配置

package io.seata.samples.integration.account;

import org.apache.dubbo.config.spring.context.annotation.EnableDubbo;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.config.ConfigFileApplicationListener;

@SpringBootApplication(scanBasePackages = "io.seata.samples.integration.account")
@MapperScan({"io.seata.samples.integration.account.mapper"})
@EnableDubbo(scanBasePackages = "io.seata.samples.integration.account")
public class AccountExampleApplication {

    public static void main(String[] args) {
        SpringApplication.run(AccountExampleApplication.class, args);
    }

}

  • @EnableDubbo等同於 @DubboComponentScan和 @EnableDubboConfig組合

  • @DubboComponentScan 掃描 classpaths 下類中添加了 @Service 和 @Reference 將自動注入到spring beans中。

  • @EnableDubboConfig 掃描的dubbo的外部化配置。

4 啓動所有的sample模塊

啓動 samples-account、samples-order、samples-storage、samples-business

並且在nocos的控制檯查看註冊情況: http://192.168.10.200:8848/nacos/#/serviceManagement

在這裏插入圖片描述

我們可以看到上面的服務都已經註冊成功。

5 測試

5. 1 發送一個下單請求

使用postman 發送 ：http://localhost:8104/business/dubbo/buy

參數：

{
    "userId":"1",
    "commodityCode":"C201901140001",
    "name":"fan",
    "count":50,
    "amount":"100"
}

返回

{
    "status": 200,
    "message": "成功",
    "data": null
}

這時候控制檯：

2019-09-05 12:17:34.097  INFO 21860 --- [nio-8104-exec-4] i.s.s.i.c.controller.BusinessController  : 請求參數：BusinessDTO(userId=1, commodityCode=C201901140001, name=fan, count=50, amount=100)
2019-09-05 12:17:34.146  INFO 21860 --- [nio-8104-exec-4] i.seata.tm.api.DefaultGlobalTransaction  : Begin new global transaction [192.168.10.200:8091:2021380638]
2019-09-05 12:17:34.150  INFO 21860 --- [nio-8104-exec-4] i.s.s.i.c.service.BusinessServiceImpl    : 開始全局事務，XID = 192.168.10.200:8091:2021380638
2019-09-05 12:17:36.966  INFO 21860 --- [nio-8104-exec-4] i.seata.tm.api.DefaultGlobalTransaction  : [192.168.10.200:8091:2021380638] commit status:Committed

事務提交成功，

我們來看一下數據庫數據變化

t_account
在這裏插入圖片描述
t_order

在這裏插入圖片描述
t_storage

在這裏插入圖片描述
數據沒有問題。

5.2 測試回滾

我們samples-business將BusinessServiceImpl的handleBusiness2 下面的代碼去掉註釋

if (!flag) {
  throw new RuntimeException("測試拋異常後，分佈式事務回滾！");
}

使用postman 發送 ：http://localhost:8104/business/dubbo/buy2

.響應結果：

{
    "timestamp": "2019-09-05T04:29:34.178+0000",
    "status": 500,
    "error": "Internal Server Error",
    "message": "測試拋異常後，分佈式事務回滾！",
    "path": "/business/dubbo/buy"
}

控制檯

2019-09-05 12:29:32.836  INFO 17264 --- [nio-8104-exec-2] i.s.s.i.c.controller.BusinessController  : 請求參數：BusinessDTO(userId=1, commodityCode=C201901140001, name=fan, count=50, amount=100)
2019-09-05 12:29:32.843  INFO 17264 --- [nio-8104-exec-2] i.s.common.loader.EnhancedServiceLoader  : load ContextCore[null] extension by class[io.seata.core.context.ThreadLocalContextCore]
2019-09-05 12:29:32.848  INFO 17264 --- [nio-8104-exec-2] i.s.common.loader.EnhancedServiceLoader  : load TransactionManager[null] extension by class[io.seata.tm.DefaultTransactionManager]
2019-09-05 12:29:32.849  INFO 17264 --- [nio-8104-exec-2] io.seata.tm.TransactionManagerHolder     : TransactionManager Singleton io.seata.tm.DefaultTransactionManager@461585ac
2019-09-05 12:29:32.859  INFO 17264 --- [nio-8104-exec-2] i.s.common.loader.EnhancedServiceLoader  : load LoadBalance[null] extension by class[io.seata.discovery.loadbalance.RandomLoadBalance]
2019-09-05 12:29:32.893  INFO 17264 --- [nio-8104-exec-2] i.seata.tm.api.DefaultGlobalTransaction  : Begin new global transaction [192.168.10.200:8091:2021380674]
2019-09-05 12:29:32.897  INFO 17264 --- [nio-8104-exec-2] i.s.s.i.c.service.BusinessServiceImpl    : 開始全局事務，XID = 192.168.10.200:8091:2021380674
2019-09-05 12:29:34.143  INFO 17264 --- [nio-8104-exec-2] i.seata.tm.api.DefaultGlobalTransaction  : [192.168.10.200:8091:2021380674] rollback status:Rollbacked
2019-09-05 12:29:34.158 ERROR 17264 --- [nio-8104-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.RuntimeException: 測試拋異常後，分佈式事務回滾！] with root cause

java.lang.RuntimeException: 測試拋異常後，分佈式事務回滾！
	at io.seata.samples.integration.call.service.BusinessServiceImpl.handleBusiness(BusinessServiceImpl.java:60) ~[classes/:na]
	at io.seata.samples.integration.call.service.BusinessServiceImpl$$FastClassBySpringCGLIB$$2ab3d645.invoke(<generated>) ~[classes/:na]
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:749) ~[spring-aop-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at io.seata.spring.annotation.GlobalTransactionalInterceptor$1.execute(GlobalTransactionalInterceptor.java:104) ~[seata-all-0.8.0.jar:0.8.0]
	at io.seata.tm.api.TransactionalTemplate.execute(TransactionalTemplate.java:64) ~[seata-all-0.8.0.jar:0.8.0]
	at io.seata.spring.annotation.GlobalTransactionalInterceptor.handleGlobalTransaction(GlobalTransactionalInterceptor.java:101) ~[seata-all-0.8.0.jar:0.8.0]
	at io.seata.spring.annotation.GlobalTransactionalInterceptor.invoke(GlobalTransactionalInterceptor.java:76) ~[seata-all-0.8.0.jar:0.8.0]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688) ~[spring-aop-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at io.seata.samples.integration.call.service.BusinessServiceImpl$$EnhancerBySpringCGLIB$$cb43f7ab.handleBusiness(<generated>) ~[classes/:na]
	at io.seata.samples.integration.call.controller.BusinessController.handleBusiness(BusinessController.java:37) ~[classes/:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_144]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_144]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_144]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_144]
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) ~[spring-webmvc-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892) ~[spring-webmvc-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) ~[spring-webmvc-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1039) ~[spring-webmvc-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ~[spring-webmvc-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) ~[spring-webmvc-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908) ~[spring-webmvc-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:660) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) ~[spring-webmvc-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.19.jar:9.0.19]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:836) [tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1747) [tomcat-embed-core-9.0.19.jar:9.0.19]
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.19.jar:9.0.19]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_144]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_144]
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.19.jar:9.0.19]
	at java.lang.Thread.run(Thread.java:748) [na:1.8.0_144]

我們查看數據庫數據，已經回滾，和上面的數據一致。

到這裏一個簡單的案例基本就分析結束。感謝你的學習。

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本人結合其他博客和自己查詢的資料，一步一步實現整合了security安全框架，其中踩過不少的坑，也有遇到許多不懂的地方，爲此做個記錄。 開發工具：ide、數據庫：mysql5.7、springboot版本：2.3.7 個人對Spring

CharyGao 2024-01-19 14:17:15

SPRINGBOOT返回數據NULL參數設爲空字符串或空數組 SPRINGBOOT返回數據NULL參數設爲空字符串或空數組

https://www.cnblogs.com/jthr/p/15825435.html   SPRINGBOOT返回數據NULL參數設爲空字符串或空數組 package com.ruoyi.framework.config.Re

故宮博物院 2022-08-15 14:28:44

文件上傳格式,後臺接收處理

前端上傳文件 1. file格式 創建formData來完成file上傳 <input type="file" id="imgfile" name="pic" multiple> <script> $("#imgfile

换个新手机 2020-07-08 12:43:13

springboot增量打包更新--靜態資源分離打包

springboot部署打包爲jar，一般都是全量打包，jar包的大小通常都是超過100M的，並且在進行一般的頁面html微調、js修改、img替換、css樣式修改時也需要重新打包進行部署；每次微小的調整都需要重新打包就太煩了，一

CNOYG 2020-07-08 12:39:29

[SpringBoot]圖解SpringBoot啓動流程+獲取配置流程

一、springboot運行流程 1、springboot獲取配置的流程 上圖是對springboot獲取配置流程的簡單總結。 運行主程序時，調用了@SpringBootApplication註解，這個註解又包含一個@Impo

童话ing 2020-07-08 12:13:46

SpringBoot項目以HTTPS方式啓動Jar包

一、將jks簽名文件放在src/main/resources下面 二、在properties文件中加入以下配置 server.ssl.key-store-type=JKS server.ssl.protocol=TLS server.ss

z100871519 2020-07-08 12:07:32

正則表達式獲取Maven依賴中的groupId

用於打包時剔除第三方jar包 mvn dependency:tree | grep '[\W\w]*:[a-zA-Z0-9_\.-]*:[a-zA-Z0-9]*:[a-zA-Z0-9\.-]*:[a-zA-Z0-9]*' |

路漫漫走 2020-07-08 11:45:59

pom文件中 dependencyManagement 和dependency區別

Maven 使用dependencyManagement元素來提供了一種管理依賴版本號的方式 通常會在一個組織或者項目的最頂層的父pom中看到dependencyManagement元素。 使用pom.xml中的dependencyMan

时光有伱记忆成花 2020-07-08 10:06:42

Springboot運行helloworld

Springboot HelloWorld 一個功能：（一個典型的web應用） 瀏覽器發起hello請求，服務器接收請求並處理，響應Hello World字符串 1、創建一個Spring Initializr 工程； 2、Spin

IT小白098 2020-07-08 09:44:19

Springboot自動加載的原理

一.概括 我們用Springboot很方便的能將一個框架給搭建起來，是因爲它將以前我們需要手動配置的地方都利用自動配置來代替，利用約定大於配置的思想簡化了我們開發工作量。例如：在沒有springboot之前，我們要在工程裏面連接數據庫的時

wangbiao007 2020-07-08 09:19:19

springboot的啓動流程

一.總結 springboot的啓動流程分下面幾步走: 1.初始化 2.獲取監聽器並啓動監聽器 3.構造容器環境 4.創建容器 5.實例化SpringBootExceptionReporter.class，用來支持報告關於啓動的錯誤 6.

wangbiao007 2020-07-08 09:19:19

Spring boot 自動裝配機制

前述 在解析spring boot starter自動裝配機制之前，我們先來回顧一下web工程是如何搭建的： gradle/pom文件中引入項目依賴jar包； 配置web.xml，Servlet配置，攔截器設置，Liste

Zz罗伯特 2020-07-08 09:16:27