mybatis--新增ID回显&条件查询&XML映射文件方式

springboot-mybatis-crud/pom.xml

@@ -58,6 +58,9 @@
                     <source>11</source>
                     <target>11</target>
                     <encoding>UTF-8</encoding>
+                    <compilerArgs>
+                        <arg>-parameters</arg>
+                    </compilerArgs>
                 </configuration>
             </plugin>
             <plugin>

springboot-mybatis-crud/src/main/java/com/inmind/mapper/EmpMapper.java

@@ -1,9 +1,10 @@
 package com.inmind.mapper;
 
 import com.inmind.pojo.Emp;
-import org.apache.ibatis.annotations.Delete;
-import org.apache.ibatis.annotations.Insert;
-import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.*;
+
+import java.time.LocalDate;
+import java.util.List;
 
 @Mapper//生成接口的实现类对象，交给spring容器管理，DI自动注入
 public interface EmpMapper {
@@ -17,7 +18,44 @@ public interface EmpMapper {
     /*
     新增员工
      */
+    @Options(keyProperty = "id",useGeneratedKeys = true)
     @Insert("insert into emp(username, name, gender, image, job, entrydate, dept_id, create_time, update_time)" +
             "values (#{username},#{name},#{gender},#{image},#{job},#{entrydate},#{deptId},#{createTime},#{updateTime});")
     public void insert(Emp emp);
+
+    /*
+    更新员工
+     */
+    @Update("update emp set username = #{username}, name = #{name}, gender = #{gender} , image = #{image} , job = #{job}, entrydate = #{entrydate}," +
+            " dept_id = #{deptId}, update_time = #{updateTime} where id = #{id}")
+    public void update(Emp emp);
+
+    /*
+    根据id查询员工
+     */
+    //数据封装，方案一 ：起别名
+    //@Select("select id, username, password, name, gender, image, job, entrydate, dept_id as deptId, create_time as createTime, update_time as updateTime from emp where id = #{id}")
+    //数据封装，方案二：mybatis注解
+    /*@Results(
+             {
+                @Result(column = "dept_id",property = "deptId"),
+                @Result(column = "create_time",property = "createTime"),
+                @Result(column = "update_time",property = "updateTime")
+            }
+    )*/
+    @Select("select * from emp where id = #{id}")
+    public Emp selectById(Integer id);
+
+    /*
+    条件查询
+     */
+//    @Select("select * from emp where  name like  '%${name}%' and gender  = #{gender} and entrydate between #{begin} and #{end}")
+    @Select("select * from emp where  name like  concat('%',#{name},'%') and gender  = #{gender} and entrydate between #{begin} and #{end}")
+    public List<Emp> list(String name,Short gender,LocalDate begin,LocalDate end);
+//    public List<Emp> list(@Param("name") String name,@Param("gender") Short gender,@Param("begin") LocalDate begin,@Param("end")LocalDate end);
+
+
+//    @Select("select * from emp where  name like  concat('%',#{name},'%') and gender  = #{gender} and entrydate between #{begin} and #{end}")
+    public List<Emp> list1(String name,Short gender,LocalDate begin,LocalDate end);
+
 }

springboot-mybatis-crud/src/main/resources/application.properties

@@ -18,3 +18,5 @@ spring.datasource.password=1234
 
 #输出mybatis的日志
 mybatis.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl
+#mybatis 驼峰自动映射
+mybatis.configuration.map-underscore-to-camel-case=true

springboot-mybatis-crud/src/main/resources/com/inmind/mapper/EmpMapper.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.inmind.mapper.EmpMapper">
+    <select id="list1" resultType="com.inmind.pojo.Emp"><!--注意：resultType定义的是单条记录的java封装类型-->
+        select * from emp where
+            name like  concat('%',#{name},'%')
+            and gender  = #{gender}
+            and entrydate between #{begin} and #{end}
+    </select>
+</mapper>

springboot-mybatis-crud/src/test/java/com/inmind/SpringbootMybatisCrudApplicationTests.java

@@ -9,6 +9,7 @@ import org.springframework.boot.test.context.SpringBootTest;
 
 import java.time.LocalDate;
 import java.time.LocalDateTime;
+import java.util.List;
 
 @SpringBootTest
 class SpringbootMybatisCrudApplicationTests {
@@ -30,7 +31,7 @@ class SpringbootMybatisCrudApplicationTests {
     @Test
     void testInsert() {
         Emp emp = new Emp();
-        emp.setUsername("zhangsan");
+        emp.setUsername("zhangsan2");
         emp.setName("张三");
         emp.setGender((short) 1);
         emp.setImage("1.jpg");
@@ -39,6 +40,42 @@ class SpringbootMybatisCrudApplicationTests {
         emp.setCreateTime(LocalDateTime.now());
         emp.setUpdateTime(LocalDateTime.now());
         empMapper.insert(emp);
+        System.out.println(emp);
+    }
+
+    @Test
+    void testUpdate() {
+        Emp emp = new Emp();
+        emp.setId(21);
+        emp.setUsername("zhangsan3");
+        emp.setName("张三666");
+        emp.setGender((short) 1);
+        emp.setImage("2.jpg");
+        emp.setEntrydate(LocalDate.of(2025,10,26));
+        emp.setDeptId(1);
+        emp.setCreateTime(LocalDateTime.now());
+        emp.setUpdateTime(LocalDateTime.now());
+        empMapper.update(emp);
+        System.out.println(emp);
+    }
+
+    @Test
+    void testSelect() {
+        Integer id = 21;
+        Emp emp = empMapper.selectById(id);
+        System.out.println(emp);
+    }
+
+    @Test
+    void testList() {
+        List<Emp> list = empMapper.list("张", (short) 1, LocalDate.of(2010, 1, 1), LocalDate.of(2020, 1, 1));
+        System.out.println(list);
+    }
+
+    @Test
+    void testList1() {
+        List<Emp> list = empMapper.list1("张", (short) 1, LocalDate.of(2010, 1, 1), LocalDate.of(2020, 1, 1));
+        System.out.println(list);
     }
 
 }