（6）SSM - Mybatis逆向工程

复制，添加的约束:

1 数据库建表

新建员工表 emp

CREATE TABLE `tbl_emp` (
  `emp_id` int(11) NOT NULL AUTO_INCREMENT,
  `emp_name` varchar(255) NOT NULL,
  `gender` char(1) DEFAULT NULL,
  `email` varchar(255) DEFAULT NULL,
  `d_id` int(11) DEFAULT NULL,
  PRIMARY KEY (`emp_id`),
  KEY `fk_emp_dept` (`d_id`),
  CONSTRAINT `fk_emp_dept` FOREIGN KEY (`d_id`) REFERENCES `tbl_dept` (`dept_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

新建部门表:

建立外键约束。

CREATE TABLE `tbl_dept` (
  `dept_id` int(11) NOT NULL AUTO_INCREMENT,
  `dept_name` varchar(255) NOT NULL,
  PRIMARY KEY (`dept_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

2 导入mybatis的依赖 逆向工程

   
    
    <dependency>
      <groupId>org.mybatis.generatorgroupId>
      <artifactId>mybatis-generator-coreartifactId>
      <version>1.3.5version>
    dependency>

mbg.xml

把上图的内容复制进来：

<generatorConfiguration>

    <context id="DB2Tables" targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressAllComments" value="true" />
        commentGenerator>
        
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/ssm_crud" userId="root"
                        password="">
        jdbcConnection>

        <javaTypeResolver>
            <property name="forceBigDecimals" value="false" />
        javaTypeResolver>

        
        <javaModelGenerator targetPackage="com.xbean"
                            targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        javaModelGenerator>

        
        <sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources">
            <property name="enableSubPackages" value="true" />
        sqlMapGenerator>

        
        <javaClientGenerator type="XMLMAPPER"
                             targetPackage="com.dao" targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true" />
        javaClientGenerator>


        
        <table tableName="tbl_emp" domainObjectName="Employee">table>
        <table tableName="tbl_dept" domainObjectName="Department">table>
    context>
generatorConfiguration>

3 测试类，连接数据库 mybatis逆向工程

package com.test;

import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

public class MBGTest {
    public static void main(String[] args) throws Exception {
        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        File configFile = new File("mbg.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);
    }

}

运行代码过后：

查看代码发现里面有很多注释:

为了把这些生成的全部删除掉，生成没有注释的。
添加如下内容:

再次运行，发现生成的里面没有注释了。