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wangyibing
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‎04spring/jdbc/pom.xml‎

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@@ -7,6 +7,18 @@
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<groupId>jdbc</groupId>
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<artifactId>jdbc-demo</artifactId>
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<version>1.0-SNAPSHOT</version>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<configuration>
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<source>7</source>
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<target>7</target>
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</configuration>
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</plugin>
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</plugins>
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</build>
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<dependencies>
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<dependency>
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<groupId>mysql</groupId>

‎05data/data-demo3/src/main/java/org/database/demo/dao/OrderDao.java‎

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import org.database.demo.entity.Order;
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import org.springframework.stereotype.Repository;
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import java.util.HashMap;
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import java.util.List;
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@Repository
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public interface OrderDao {
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int insertOne(Order order);
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List<HashMap<String, Object>> query(HashMap<String, Object> condition);
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int update(Order order);
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}

‎05data/data-demo3/src/main/resources/mapper/OrderMapper.xml‎

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<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
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<mapper namespace="org.database.demo.dao.OrderDao">
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<sql id="sql_model">
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id,user_id
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</sql>
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<insert id="insertOne">
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insert into t_order (id,user_id) values (#{id},#{userId})
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</insert>
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<update id="update">
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update t_order set
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<trim suffixOverrides="where id = #{id}" suffix=",">
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<if test = "id!= null">
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id = #{id}
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</if>
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<if test = "user_id!= null">
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and user_id = #{user_id}
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</if>
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</trim>
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</update>
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<select id="query" resultType = "java.util.HashMap">
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select <include refid = "sql_model"></include> from t_order
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<trim prefix="where" prefixOverrides="AND |OR">
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<if test = "id!= null">
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id = #{id}
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</if>
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<if test = "user_id!= null">
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and user_id = #{user_id}
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</if>
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</trim>
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</select>
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</mapper>

‎05data/data-demo3/src/test/java/org/database/demo/dao/OrderTest.java‎

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import org.database.demo.entity.Order;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.api.extension.ExtendWith;
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import org.mockito.internal.matchers.Or;
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import org.mybatis.spring.annotation.MapperScan;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.test.context.SpringBootTest;
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import org.springframework.test.context.junit.jupiter.SpringExtension;
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import java.util.HashMap;
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import java.util.List;
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@SpringBootTest
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@ExtendWith(SpringExtension.class)
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@MapperScan(basePackages = "org.database.demo.dao")
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@Test
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public void test(){
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Order order = new Order(1, 1);
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int num = orderDao.insertOne(order);
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// Order order = new Order(1, 2);
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// int num = orderDao.insertOne(order);
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HashMap<String, Object> condition = new HashMap<>(1);
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condition.put("user_id",1);
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List<HashMap<String, Object>> list = orderDao.query(condition);
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list.forEach(System.out::println);
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Order order = new Order(1, 3);
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int num1 = orderDao.update(order);
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}
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}

‎05data/data-demo3/target/classes/mapper/OrderMapper.xml‎

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<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
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<mapper namespace="org.database.demo.dao.OrderDao">
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<sql id="sql_model">
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id,user_id
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</sql>
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<insert id="insertOne">
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insert into t_order (id,user_id) values (#{id},#{userId})
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</insert>
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<select id="query" resultType = "java.util.HashMap">
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select <include refid = "sql_model"></include> from t_order
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<trim prefix="where" prefixOverrides="AND |OR">
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<if test = "id!= null">
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id = #{id}
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</if>
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<if test = "user_id!= null">
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and user_id = #{user_id}
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</if>
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</trim>
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</select>
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</mapper>

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