一、創建springboot項目
網上有很多教程，不再贅述。
二、配置maven的pom.xml文件
在原來pom.xml文件的基礎上添加以下內容
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1.在<dependencies>標籤中添加
2.在<plugins>標籤中添加
3.在<build>標籤中添加
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這是配置好的pom.xml文件。
<?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 https://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>2.2.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.qmwj</groupId>
<artifactId>question</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>question</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.5</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>2.2.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.1</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.0</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<fork>true</fork>
</configuration>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.5</version>
<configuration>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
</plugin>
</plugins>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
<filtering>true</filtering>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
</includes>
</resource>
</resources>
</build>
</project>
三、逆向工程配置文件
在項目下的src/main/resources目錄下建立generatorConfig.xml和generator.properties配置文件。
注意：generator.properties要創建成Resource Bundle類型
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創建好後如下圖所示:
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eneratorConfig.xml文件配置如下：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
<!--引入數據庫配置文件以解耦-->
<properties resource="generator.properties"/>
<context id="testTables" targetRuntime="MyBatis3">
<commentGenerator>
<!-- 是否去除自動生成的註釋，true：是；false:否 -->
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!--數據庫連接的信息：驅動類、連接地址、用戶名、密碼 -->
<jdbcConnection driverClass="${jdbc.driver}"
connectionURL="${jdbc.url}"
userId="${jdbc.username}"
password="${jdbc.password}">
<property name="nullCatalogMeansCurrent" value="true" />
<!-- 不加這句話會生成xxxWithBlobs -->
</jdbcConnection>
<!-- 默認false，把JDBC DECIMAL 和 NUMERIC 類型解析爲 Integer，爲 true時把JDBC DECIMAL 和
NUMERIC 類型解析爲java.math.BigDecimal -->
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- targetPackage:生成實體類的位置 -->
<javaModelGenerator targetPackage="com.qmwj.question.bean"
targetProject="src\main\java">
<!-- enableSubPackages:是否讓schema作爲包的後綴 -->
<property name="enableSubPackages" value="false" />
<!-- 從數據庫返回的值被清理前後的空格 -->
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!-- targetProject:mapper映射文件生成的位置 -->
<sqlMapGenerator targetPackage="mapper"
targetProject="src\main\resources">
<!-- enableSubPackages:是否讓schema作爲包的後綴 -->
<property name="enableSubPackages" value="false" />
</sqlMapGenerator>
<!--targetPackage：mapper接口生成的位置，遵循MyBatis規範，讓mapper.xml
和mapper.java在同一目錄下 -->
<javaClientGenerator type="XMLMAPPER"
targetPackage="com.qmwj.question.Mapper"
targetProject="src\main\java">
<!-- enableSubPackages:是否讓schema作爲包的後綴 -->
<property name="enableSubPackages" value="false" />
</javaClientGenerator> <!-- 指定數據庫表 -->
<table tableName="answer" domainObjectName="Answer"
enableCountByExample="false" enableUpdateByExample="false"
enableDeleteByExample="false" enableSelectByExample="false"
selectByExampleQueryId="false"></table>
<table tableName="question" domainObjectName="Question"
enableCountByExample="false" enableUpdateByExample="false"
enableDeleteByExample="false" enableSelectByExample="false"
selectByExampleQueryId="false"></table>
<table tableName="questionnaire" domainObjectName="Questionnaire"
enableCountByExample="false" enableUpdateByExample="false"
enableDeleteByExample="false" enableSelectByExample="false"
selectByExampleQueryId="false"></table>
<table tableName="user" domainObjectName="User"
enableCountByExample="false" enableUpdateByExample="false"
enableDeleteByExample="false" enableSelectByExample="false"
selectByExampleQueryId="false"></table>
</context>
</generatorConfiguration>
generator.properties（mysql）配置如下：
注意：location必須加上mysqlconnector的jar包的路徑
jdbc.driverLocation = D://Mysql5.7/mysql-connector-java-5.1.7-bin.jar
jdbc.driver = com.mysql.jdbc.Driver
jdbc.url = jdbc:mysql://localhost:3306/question?useSSL=false&useUnicode=true&characterEncoding=UTF-8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
jdbc.username = root
jdbc.password = root
四、運行程序生成代碼
創建GenerateUtil.java,路徑如下：
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運行這個java文件即可 |
package com.qmwj.question.util;
import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.exception.InvalidConfigurationException;
import org.mybatis.generator.exception.XMLParserException;
import org.mybatis.generator.internal.DefaultShellCallback;
import java.io.File;
import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
public class GenerateUtil {
public static void main(String[] args) {
try {
System.out.println("MyBatis反向生成");
List<String> warnings = new ArrayList<>();
boolean overwrite = true;
File configFile = new
File("D://新建文件夾/Question/src/main/resources/generatorConfig.xml");
ConfigurationParser cp = new ConfigurationParser(warnings);
Configuration config = cp.parseConfiguration(configFile);
DefaultShellCallback callback = new DefaultShellCallback(overwrite);
MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
myBatisGenerator.generate(null);
System.out.println("執行完畢");
} catch (IOException e) {
e.printStackTrace();
} catch (XMLParserException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (InvalidConfigurationException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}}
五、運行結果（部分）
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結束後，需要把以上添加的所有的配置刪除，不然會報錯。