idea 實現逆向工程(反向工程)

pom.xml 配置  在build里添加

 

<!--逆向工程-->
    <plugins>
      <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>5.1.22</version>
          </dependency>
        </dependencies>
        <configuration>
          <!--配置文件的路徑-->
          <configurationFile>src/main/resources/generatorConfig.xml</configurationFile>
          <overwrite>true</overwrite>
        </configuration>
      </plugin>
    </plugins>

 

 

 

在resources添加文件 generatorConfig.xml 

 

<?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="test" targetRuntime="MyBatis3">
        <plugin type="org.mybatis.generator.plugins.EqualsHashCodePlugin"></plugin>
        <plugin type="org.mybatis.generator.plugins.SerializablePlugin"></plugin>
        <plugin type="org.mybatis.generator.plugins.ToStringPlugin"></plugin>
        <commentGenerator>
            <!-- 這個元素用來去除指定生成的注釋中是否包含生成的日期 false:表示保護 -->
            <!-- 如果生成日期，會造成即使修改一個字段，整個實體類所有屬性都會發生變化，不利於版本控制，所以設置為true -->
            <property name="suppressDate" value="true" />
            <!-- 是否去除自動生成的注釋 true：是 ： false:否 -->
            <property name="suppressAllComments" value="true" />
        </commentGenerator>
        <!--數據庫鏈接URL，用戶名、密碼 -->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/shy" userId="root"
                        password="123456">
        </jdbcConnection>
        <javaTypeResolver>
            <!-- This property is used to specify whether MyBatis Generator should
                force the use of java.math.BigDecimal for DECIMAL and NUMERIC fields, -->
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>
        <!-- 生成模型的包名和位置 -->
        <javaModelGenerator targetPackage="com.etc.entity"
                            targetProject="target">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>
        <!-- 生成映射文件的包名和位置 -->
        <sqlMapGenerator targetPackage="com.etc.dao"
                         targetProject="target">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>
        <!-- 生成DAO的包名和位置 -->
        <javaClientGenerator type="XMLMAPPER"
                             targetPackage="com.etc.dao"
                             targetProject="target">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>

        <!-- 要生成哪些表 -->
        <table tableName="t_cart" domainObjectName="Cart"></table>
        <table tableName="t_furniture" domainObjectName="Furniture"></table>
        <table tableName="t_order" domainObjectName="Order"></table>
        <table tableName="t_type" domainObjectName="Type"></table>
        <table tableName="t_user" domainObjectName="User"></table>

    </context>
</generatorConfiguration>

 

 

 

待idea 下載完成后 點擊最右邊的Mavenprojects

 

 在這會出現 mybatis-generator 運行下面的插件，只有能連上數據庫就ok了

生成的dao和entity在這

 

移動到對應的包下后測試：

package com.etc.dao;


import com.etc.entity.User;
import com.etc.entity.UserExample;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.io.IOException;
import java.util.List;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class UserDAOTest {

    @Autowired
    private UserMapper userMapper;

    @Test
    public void test() throws IOException {

        //通過criteria構造查詢條件
        UserExample userExample = new UserExample();
        userExample.setOrderByClause("u_name asc"); //asc升序,desc降序排列
        userExample.setDistinct(false); //去除重復,true是選擇不重復記錄,false反之
        UserExample.Criteria criteria = userExample.createCriteria(); //構造自定義查詢條件
        criteria.andUNameEqualTo("qlt");

        //自定義查詢條件可能返回多條記錄,使用List接收
        List<User> list = userMapper.selectByExample(userExample);

        for(User u : list){
            System.out.println(u);
        }
    }
}