SpringCloud+vue+element-ui+docker前後端項目實踐到部署（二）

原創

2020-06-28 13:19

client1,client2集成mysql數據庫並實現springboot分頁

在客戶端pom文件中添加依賴，mybatis，mysql，分頁插件

<!--mybatis-->
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>1.1.1</version>
</dependency>

<!--mysql-->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.16</version>
    <scope>runtime</scope>
</dependency>

<!--分頁插件-->
<dependency>
    <groupId>com.github.pagehelper</groupId>
    <artifactId>pagehelper-spring-boot-starter</artifactId>
    <version>1.2.4</version>
</dependency>

數據庫新建demo數據庫及test表

添加對應java文件，及xml文件文件目錄如下，爲了方便使用idea可以安裝lombok插件，安裝步驟settings > Plugins > lombok 安裝即可;

yml配置文件添加配置

eureka:
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka/
spring:
  application:
    name: client1
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/demo?serverTimezone=UTC&zeroDateTimeBehavior=convertToNull
    username: root
    password: 123456
server:
  port: 8081

#mybatis插件
mybatis:
  mapper-locations: classpath:mapper/*.xml
  type-aliases-package: com.ljq.client1.entity

#分頁插件
pagehelper:
  helper-dialect: mysql
  reasonable: true
  support-methods-arguments: true
  params: count=countSql

啓動類添加mapper註解

@MapperScan({"com.ljq.client1.mapper"})

分頁實體pageInfo具體代碼如下

import com.github.pagehelper.Page;

import java.io.Serializable;
import java.util.Collection;
import java.util.List;

public class PageInfo<T> implements Serializable {

    private static final long serialVersionUID = 1L;
    //當前頁
    private int pageNum;
    //每頁的數量
    private int pageSize;
    //總記錄數
    private long total;
    //總頁數
    private int pages;
    //結果集
    private List<T> list;
    //是否爲第一頁
    private boolean isFirstPage = false;
    //是否爲最後一頁
    private boolean isLastPage = false;


    public PageInfo() {
    }

    /**
     * 包裝Page對象
     *
     * @param list
     */
    public PageInfo(List<T> list) {
        if (list instanceof Page) {
            Page page = (Page) list;
            this.pageNum = page.getPageNum();
            this.pageSize = page.getPageSize();

            this.pages = page.getPages();
            this.list = page;
            this.total = page.getTotal();
        } else if (list instanceof Collection) {
            this.pageNum = 1;
            this.pageSize = list.size();

            this.pages = 1;
            this.list = list;
            this.total = list.size();
        }
        if (list instanceof Collection) {
            //判斷頁面邊界
            judgePageBoudary();
        }
    }

    /**
     * 判定頁面邊界
     */
    private void judgePageBoudary() {
        isFirstPage = pageNum == 1;
        isLastPage = pageNum == pages;
    }

    public int getPageNum() {
        return pageNum;
    }

    public void setPageNum(int pageNum) {
        this.pageNum = pageNum;
    }

    public int getPageSize() {
        return pageSize;
    }

    public void setPageSize(int pageSize) {
        this.pageSize = pageSize;
    }

    public long getTotal() {
        return total;
    }

    public void setTotal(long total) {
        this.total = total;
    }

    public int getPages() {
        return pages;
    }

    public void setPages(int pages) {
        this.pages = pages;
    }

    public List<T> getList() {
        return list;
    }

    public void setList(List<T> list) {
        this.list = list;
    }

    public boolean isIsFirstPage() {
        return isFirstPage;
    }

    public void setIsFirstPage(boolean isFirstPage) {
        this.isFirstPage = isFirstPage;
    }

    public boolean isIsLastPage() {
        return isLastPage;
    }

    public void setIsLastPage(boolean isLastPage) {
        this.isLastPage = isLastPage;
    }

    @Override
    public String toString() {
        final StringBuffer sb = new StringBuffer("PageInfo{");
        sb.append("pageNum=").append(pageNum);
        sb.append(", pageSize=").append(pageSize);
        sb.append(", total=").append(total);
        sb.append(", pages=").append(pages);
        sb.append(", list=").append(list);
        sb.append(", isFirstPage=").append(isFirstPage);
        sb.append(", isLastPage=").append(isLastPage);
        sb.append(", navigatepageNums=");
        sb.append('}');
        return sb.toString();
    }
}

調用過程關鍵代碼