Mybaits-Maven项目之逆向工程（代码自动生成）

1、添加maven插件，让maven环境支持mybatis-generator组件
在pom.xml里面添加如下代码：

<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>
<groupId>cn.mybatis.generator</groupId>
<artifactId>mybatis-generator</artifactId>
<version>0.0.1-SNAPSHOT</version>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<dependencies>
<!-- mysql驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.35</version>
</dependency>
<!-- Mybaits逆转工程依赖包 -->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.2</version>
</dependency>
<!-- Mybaits 依赖jar包 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.3.1</version>
</dependency>
<!-- log4j 依赖jar包 -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
</dependencies>

<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
<version>3.3</version>
</plugin>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.35</version>
</dependency>
</dependencies>
<configuration>
<!--配置文件的路径 -->
<configurationFile>src/main/resources/generatorConfig.xml</configurationFile>
<overwrite>true</overwrite>
</configuration>
</plugin>
<!--JDK版本 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.5.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
<showWarnings>true</showWarnings>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>

</project>

　　

2、新建generator.xml配置文件

<?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>
<context id="generateTables" targetRuntime="MyBatis3">

<!-- 此处是将 Example 改名为 Criteria
<plugin type="org.mybatis.generator.plugins.RenameExampleClassPlugin">
<property name="searchString" value="Example" />
<property name="replaceString" value="Criteria" />
</plugin> -->

<!-- 序列化 -->
<plugin type="org.mybatis.generator.plugins.SerializablePlugin" />

<commentGenerator>
<!-- 是否去除自动生成的注释 true：是 ： false:否 -->
<property name="suppressAllComments" value="true" />
<property name="suppressDate" value="true" />
</commentGenerator>

<!--数据库连接的信息：驱动类、连接地址、用户名、密码 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://39.108.217.125:3306/RoboBlogs" userId="root"
password="HZBhzb1237763522-1">
</jdbcConnection>

<!-- <jdbcConnection driverClass="oracle.jdbc.OracleDriver" connectionURL="jdbc:oracle:thin:@127.0.0.1:1521:yycg"
userId="yycg" password="yycg"> </jdbcConnection> -->

<!-- 默认false，把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer，为 true时把JDBC DECIMAL
和 NUMERIC 类型解析为java.math.BigDecimal -->
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>

<!-- targetProject:生成PO类的位置 -->
<javaModelGenerator targetPackage="com.Mybaits.pojo"
targetProject=".\src\main\java">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
<!-- 从数据库返回的值被清理前后的空格 -->
<property name="trimStrings" value="true" />
</javaModelGenerator>

<!-- targetProject:mapper映射文件生成的位置 -->
<sqlMapGenerator targetPackage="com.Mybaits.mapper"
targetProject=".\src\main\java">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
</sqlMapGenerator>

<!-- targetPackage：mapper接口生成的位置 -->
<javaClientGenerator type="XMLMAPPER"
targetPackage="com.Mybaits.mapper" targetProject=".\src\main\java">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
</javaClientGenerator>

<!-- 指定数据库表 保留Example例子 -->
<table schema="" tableName="u01" domainObjectName="u01" />
<table schema="" tableName="Upload_info" domainObjectName="Upload_info"/>
<table schema="" tableName="Upload_UserPushContent" domainObjectName="Upload_UserPushContent" />
<!-- 指定数据库表 去除Example例子
<table schema="general" tableName="tb_item" domainObjectName="Item"
enableCountByExample="false" enableUpdateByExample="false"
enableDeleteByExample="false" enableSelectByExample="true"
selectByExampleQueryId="false">
<property name="useActualColumnNames" value="false" />
</table> -->
</context>
</generatorConfiguration>

3.1、运用maven指令生成逆向工程代码

3.2、使用单元测试生成逆向工程代码：

package MybaitsGenerator;
import java.io.File;
import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
 
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 org.junit.Test;
 
public class MybaitsGeneratorTest {
    @Test
   public void MybaitsGenerator() throws IOException, XMLParserException, InvalidConfigurationException, SQLException, InterruptedException{
        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;//加载上面的配置文件
        File configFile = new File("./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);
   }
}

4.刷新页面，效果如：