mybatis自动生成代码及使用

发布时间：2020-08-01 22:09:04 来源：网络阅读：328 作者：wx5d8484d25f876 栏目：编程语言

mybatis自动生成代码及使用

1.新建maven项目

2.项目基础配置

找到maven工程所在目录下org.eclipse.wst.common.project.facet.core.xml此文件

修改成如下内容

mybatis自动生成代码及使用

maven工程下的web.xml文件替换为

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
       version="3.1" metadata-complete="true">

</web-app>

pom.xml文件中修改build节点，添加如下内容

&lt;plugin&gt;
&lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
&lt;artifactId&gt;maven-compiler-plugin&lt;/artifactId&gt;
&lt;version&gt;3.1&lt;/version&gt;
&lt;configuration&gt;
&lt;source&gt;1.7&lt;/source&gt;
&lt;target&gt;1.7&lt;/target&gt;
&lt;/configuration&gt;
&lt;/plugin&gt;

3.在pom.xml追加如下内容

<dependency>
    <groupId>org.mybatis.generator</groupId>
    <artifactId>mybatis-generator-core</artifactId>
    <version>1.3.2</version>
</dependency>

<plugin>
    <groupId>org.mybatis.generator</groupId>
    <artifactId>mybatis-generator-maven-plugin</artifactId>
    <version>1.3.2</version>
    <configuration>
        <!-- mybatis-generator的配置文件，根据情况调整位置 -->
        <configurationFile>src/main/resources/generatorConfig.xml</configurationFile>
        <verbose>true</verbose>
        <overwrite>true</overwrite>
    </configuration>
    <dependencies>
        <!-- 数据库驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.34</version>
        </dependency>
                </dependencies>
    <executions>
        <execution>
            <id>Generate MyBatis Artifacts</id>
            <goals>
                <goal>generate</goal>
            </goals>
        </execution>
    </executions>
</plugin>

4.在src/main/resources文件下创建generatorConfig.xml，内容如下

<?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">

<!-- 配置Run As Maven build : Goals 参数 : mybatis-generator:generate -Dmybatis.generator.overwrite=true -->
<!-- 配置 tableName,使用 Run As Maven build 生成 dao model 层 -->
<generatorConfiguration>
    <!-- 配置文件路径
    <properties url="${mybatis.generator.generatorConfig.properties}"/>-->
    <context id="DB2Tables" targetRuntime="MyBatis3">
        <!--关闭注释 -->
        <commentGenerator>
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>

        <!--数据库连接信息 -->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/test?useUnicode=true&amp;characterEncoding=utf-8" userId="root"
                        password="123456">
        </jdbcConnection>

        <!--生成的model 包路径 -->
        <javaModelGenerator targetPackage="com.lymn.it.model" targetProject="src/main/java">
            <property name="enableSubPackages" value="ture"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>

        <!--生成xml mapper文件 路径 -->
        <sqlMapGenerator targetPackage="com.lymn.it.mapper" targetProject="src/main/java">
            <property name="enableSubPackages" value="ture"/>
        </sqlMapGenerator>

        <!-- 生成的Dao接口 的包路径 -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.lymn.it.mapper" targetProject="src/main/java">
            <property name="enableSubPackages" value="ture"/>
        </javaClientGenerator>

        <!--对应数据库表名，多个表，请复制指定 -->
        <table tableName="user" domainObjectName="User"
               enableCountByExample="false" enableUpdateByExample="false"
               enableDeleteByExample="false" enableSelectByExample="false"
               selectByExampleQueryId="false">
        </table>
    </context>
</generatorConfiguration>

5.右键项目--》run As--》Maven build--》输入mybatis-generator:generate，即可创建成功。

mybatis自动生成代码及使用

6.生成代码如下

package com.lymn.it.mapper;

import com.lymn.it.model.User;

public interface UserMapper {
    int deleteByPrimaryKey(Integer userid);

    int insert(User record);

    int insertSelective(User record);

    User selectByPrimaryKey(Integer userid);

    int updateByPrimaryKeySelective(User record);

    int updateByPrimaryKey(User record);

}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.lymn.it.mapper.UserMapper">
  <resultMap id="BaseResultMap" type="com.lymn.it.model.User">
    <id column="userid" jdbcType="INTEGER" property="userid" />
    <result column="username" jdbcType="VARCHAR" property="username" />
    <result column="password" jdbcType="VARCHAR" property="password" />
    <result column="email" jdbcType="VARCHAR" property="email" />
    <result column="phone" jdbcType="VARCHAR" property="phone" />
    <result column="status" jdbcType="VARCHAR" property="status" />
    <result column="code" jdbcType="VARCHAR" property="code" />
  </resultMap>
  <sql id="Base_Column_List">
    userid, username, password, email, phone, status, code
  </sql>
  <select id="selectByPrimaryKey" parameterType="java.lang.Integer" resultMap="BaseResultMap">
    select 
    <include refid="Base_Column_List" />
    from user
    where userid = #{userid,jdbcType=INTEGER}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">
    delete from user
    where userid = #{userid,jdbcType=INTEGER}
  </delete>
  <insert id="insert" parameterType="com.lymn.it.model.User">
    insert into user (userid, username, password, 
      email, phone, status, 
      code)
    values (#{userid,jdbcType=INTEGER}, #{username,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR}, 
      #{email,jdbcType=VARCHAR}, #{phone,jdbcType=VARCHAR}, #{status,jdbcType=VARCHAR}, 
      #{code,jdbcType=VARCHAR})
  </insert>
  <insert id="insertSelective" parameterType="com.lymn.it.model.User">
    insert into user
    <trim prefix="(" suffix=")" suffixOverrides=",">
      <if test="userid != null">
        userid,
      </if>
      <if test="username != null">
        username,
      </if>
      <if test="password != null">
        password,
      </if>
      <if test="email != null">
        email,
      </if>
      <if test="phone != null">
        phone,
      </if>
      <if test="status != null">
        status,
      </if>
      <if test="code != null">
        code,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides=",">
      <if test="userid != null">
        #{userid,jdbcType=INTEGER},
      </if>
      <if test="username != null">
        #{username,jdbcType=VARCHAR},
      </if>
      <if test="password != null">
        #{password,jdbcType=VARCHAR},
      </if>
      <if test="email != null">
        #{email,jdbcType=VARCHAR},
      </if>
      <if test="phone != null">
        #{phone,jdbcType=VARCHAR},
      </if>
      <if test="status != null">
        #{status,jdbcType=VARCHAR},
      </if>
      <if test="code != null">
        #{code,jdbcType=VARCHAR},
      </if>
    </trim>
  </insert>
  <update id="updateByPrimaryKeySelective" parameterType="com.lymn.it.model.User">
    update user
    <set>
      <if test="username != null">
        username = #{username,jdbcType=VARCHAR},
      </if>
      <if test="password != null">
        password = #{password,jdbcType=VARCHAR},
      </if>
      <if test="email != null">
        email = #{email,jdbcType=VARCHAR},
      </if>
      <if test="phone != null">
        phone = #{phone,jdbcType=VARCHAR},
      </if>
      <if test="status != null">
        status = #{status,jdbcType=VARCHAR},
      </if>
      <if test="code != null">
        code = #{code,jdbcType=VARCHAR},
      </if>
    </set>
    where userid = #{userid,jdbcType=INTEGER}
  </update>
  <update id="updateByPrimaryKey" parameterType="com.lymn.it.model.User">
    update user
    set username = #{username,jdbcType=VARCHAR},
      password = #{password,jdbcType=VARCHAR},
      email = #{email,jdbcType=VARCHAR},
      phone = #{phone,jdbcType=VARCHAR},
      status = #{status,jdbcType=VARCHAR},
      code = #{code,jdbcType=VARCHAR}
    where userid = #{userid,jdbcType=INTEGER}
  </update>

</mapper>

package com.lymn.it.model;

public class User {
    private Integer userid;

    private String username;

    private String password;

    private String email;

    private String phone;

    private String status;

    private String code;

    public Integer getUserid() {
        return userid;
    }

    public void setUserid(Integer userid) {
        this.userid = userid;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username == null ? null : username.trim();
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password == null ? null : password.trim();
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email == null ? null : email.trim();
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone == null ? null : phone.trim();
    }

    public String getStatus() {
        return status;
    }

    public void setStatus(String status) {
        this.status = status == null ? null : status.trim();
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code == null ? null : code.trim();
    }
}

8.参照SSM框架搭建之传统方式(一)博客中的service、controller层进行测试

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mybatis自动生成代码及使用

mybatis自动生成代码及使用

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