Commit:MyBatis-2 动态SQL

MyBatis-02/pom.xml

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+<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>SSM-bootstrap</artifactId>
+        <groupId>org.example</groupId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>MyBatis-02</artifactId>
+    <dependencies>
+        <dependency>
+            <groupId>org.mybatis</groupId>
+            <artifactId>mybatis</artifactId>
+            <version>3.5.7</version>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <maven.compiler.source>8</maven.compiler.source>
+        <maven.compiler.target>8</maven.compiler.target>
+    </properties>
+
+</project>

MyBatis-02/src/main/java/tech/rpish/po/User.java

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+package tech.rpish.po;
+
+public class User {
+    private Integer id;
+    private String username;
+    private String job;
+    private String phone;
+
+    @Override
+    public String toString() {
+        return "User{" +
+                "id=" + id +
+                ", username='" + username + '\'' +
+                ", job='" + job + '\'' +
+                ", phone='" + phone + '\'' +
+                '}';
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getJob() {
+        return job;
+    }
+
+    public void setJob(String job) {
+        this.job = job;
+    }
+
+    public String getPhone() {
+        return phone;
+    }
+
+    public void setPhone(String phone) {
+        this.phone = phone;
+    }
+}

MyBatis-02/src/main/java/tech/rpish/util/MyBatisUtils.java

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+package tech.rpish.util;
+
+import org.apache.ibatis.session.SqlSession;
+import org.apache.ibatis.session.SqlSessionFactory;
+
+import org.apache.ibatis.io.Resources;
+import org.apache.ibatis.session.SqlSessionFactoryBuilder;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+public class MyBatisUtils {
+    private static SqlSessionFactory sqlSessionFactory = null;
+    static {
+        try {
+            String resource = "mybatis-config.xml";
+            InputStream inputStream = Resources.getResourceAsStream(resource);
+            sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
+
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public static SqlSession getSession() {
+        return sqlSessionFactory.openSession();
+    }
+}

MyBatis-02/src/main/resources/db.properties

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+jdbc.driver=com.mysql.jdbc.Driver
+jdbc.url=jdbc:mysql://localhost:3306/ssm_bootstrap
+jdbc.username=root
+jdbc.password=pass

MyBatis-02/src/main/resources/log4j. properties

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+# Global logging configuration
+log4j.rootLogger=ERROR, stdout
+# MyBatis logging configuration...
+log4j.logger.com.ssm=DEBUG
+Console output...
+log4j.appender.stdout=org.apache.log4j.ConsoleAppender
+log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
+log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

MyBatis-02/src/main/resources/mapper/UserMapper.xml

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+<?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="tech.rpish.mapper.UserMapper">
+    <select id="findUserByNameAndJob" parameterType="tech.rpish.po.User" resultType="tech.rpish.po.User">
+        select * from user
+        <where>
+            <if test="username !=null and username !=''">
+                and username like concat('%',#{username},'%')
+            </if>
+            <if test="job != null and job !=''">
+                and job = #{job}
+            </if>
+        </where>
+    </select>
+
+    <select id="findUserByNameOrJob" parameterType="tech.rpish.po.User" resultType="tech.rpish.po.User">
+        select * from user
+        <where>
+            <choose>
+                <when test="username != null and username !=''">
+                    and username like concat('%',#{username},'%')
+                </when>
+                <when test="job != null and job != ''">
+                    and job=#{job}
+                </when>
+                <otherwise>
+                    and phone is not null
+                </otherwise>
+            </choose>
+        </where>
+    </select>
+
+    <update id="updateUser" parameterType="tech.rpish.po.User">
+        update user
+        <set>
+            <if test="username != null and username != ''">
+                username=#{username},
+            </if>
+            <if test="job != null and job!=''">
+                job=#{job},
+            </if>
+            <if test="phone!=null and phone!=''">
+                phone=#{phone}
+            </if>
+        </set>
+        where id=#{id}
+    </update>
+
+    <select id="findUserByIds" parameterType="List" resultType="tech.rpish.po.User">
+        select * from user where id in
+        <foreach item="id" index="index" collection="list" open="(" separator="," close=")">
+            #{id}
+        </foreach>
+    </select>
+
+    <select id="findUserByName" parameterType="tech.rpish.po.User" resultType="tech.rpish.po.User">
+        <bind name="p_username" value="'%'+username+'%'"/>
+        select * from user
+        where username like #{p_username}
+    </select>
+</mapper>

MyBatis-02/src/main/resources/mybatis-config.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-config.dtd">
+<configuration>
+    <properties resource="db.properties"/>
+    <environments default="mysql">
+        <environment id="mysql">
+            <transactionManager type="JDBC"></transactionManager>
+            <dataSource type="POOLED">
+                <property name="driver" value="${jdbc.driver}"/>
+                <property name="url" value="${jdbc.url}"/>
+                <property name="username" value="${jdbc.username}"/>
+                <property name="password" value="${jdbc.password}"/>
+            </dataSource>
+        </environment>
+    </environments>
+    <mappers>
+        <mapper resource="mapper/UserMapper.xml"></mapper>
+    </mappers>
+</configuration>

MyBatis-02/src/test/java/MyBatisTest.java

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+import org.apache.ibatis.session.SqlSession;
+import org.junit.Test;
+import tech.rpish.po.User;
+import tech.rpish.util.MyBatisUtils;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class MyBatisTest {
+    @Test
+    public void findUserByNameAndJobTest() throws Exception {
+        SqlSession sqlSession = MyBatisUtils.getSession();
+        User user = new User();
+        user.setUsername("f");
+        user.setJob("fo");
+        List<User> users = sqlSession.selectList("tech.rpish.mapper.UserMapper.findUserByNameAndJob", user);
+        for (User u :
+                users) {
+            System.out.println(u);
+        }
+        sqlSession.close();
+    }
+
+    @Test
+    public void findUserByNameOrJobTest() throws Exception {
+        SqlSession session = MyBatisUtils.getSession();
+        User user = new User();
+        user.setUsername("fo");
+        user.setJob("f");
+        List<User> users = session.selectList("tech.rpish.mapper.UserMapper.findUserByNameOrJob", user);
+        for (User u :
+                users) {
+            System.out.println(u);
+        }
+        session.close();
+    }
+
+    @Test
+    public void updateUserTest() throws Exception {
+        SqlSession session = MyBatisUtils.getSession();
+        User user = new User();
+        user.setId(1);
+        user.setPhone("220");
+        int rows = session.update("tech.rpish.mapper.UserMapper.updateUser", user);
+        if (rows > 0) {
+            System.out.println("成功修改" + rows + "条数据");
+        } else {
+            System.out.println("修改失败");
+        }
+        session.commit();
+        session.close();
+    }
+
+    @Test
+    public void findUserByIdsTest() throws Exception {
+        SqlSession session = MyBatisUtils.getSession();
+        List<Integer> ids = new ArrayList<Integer>();
+        ids.add(1);
+        ids.add(2);
+        List<User> users = session.selectList("tech.rpish.mapper.UserMapper.findUserByIds", ids);
+        for (User u :
+                users) {
+            System.out.println(u);
+        }
+        session.close();
+    }
+
+    @Test
+    public void findUserByName() {
+        SqlSession session = MyBatisUtils.getSession();
+        User user = new User();
+        user.setUsername("f");
+        List<User> users = session.selectList("tech.rpish.mapper.UserMapper.findUserByName", user);
+        for (User u : users
+        ) {
+            System.out.println(u);
+        }
+        session.close();
+    }
+}

MyBatis-02/target/classes/db.properties

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+jdbc.driver=com.mysql.jdbc.Driver
+jdbc.url=jdbc:mysql://localhost:3306/ssm_bootstrap
+jdbc.username=root
+jdbc.password=pass

MyBatis-02/target/classes/log4j. properties

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+# Global logging configuration
+log4j.rootLogger=ERROR, stdout
+# MyBatis logging configuration...
+log4j.logger.com.ssm=DEBUG
+Console output...
+log4j.appender.stdout=org.apache.log4j.ConsoleAppender
+log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
+log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n