Mybatis增删改查，各种参数方式
sql 和上篇一样不重复写了
student
package com.mybatis.model;
import java.util.Date;
public class student {
private Integer student_id;
private String student_name;
private String student_sex;
private Date student_birthday;
private Integer class_id;
public student() {
super();
}
public Integer getStudent_id() {
return student_id;
}
public void setStudent_id(Integer student_id) {
this.student_id = student_id;
}
public String getStudent_name() {
return student_name;
}
public void setStudent_name(String student_name) {
this.student_name = student_name == null ? null : student_name.trim();
}
public String getStudent_sex() {
return student_sex;
}
public void setStudent_sex(String student_sex) {
this.student_sex = student_sex == null ? null : student_sex.trim();
}
public Date getStudent_birthday() {
return student_birthday;
}
public void setStudent_birthday(Date student_birthday) {
this.student_birthday = student_birthday;
}
public Integer getClass_id() {
return class_id;
}
public void setClass_id(Integer class_id) {
this.class_id = class_id;
}
}
studentMapper
package com.mybatis.dao;
import java.util.Date;
import java.util.List;
import java.util.Map;
import org.apache.ibatis.annotations.Param;
import org.springframework.stereotype.Repository;
import com.mybatis.model.classes;
import com.mybatis.model.student;
@Repository
public interface studentMapper {
List<student>getStudentByClassID(int id);
void insertStudent(student student);
void updateStudent(student student);
student getStudentById(int id);
void deleteStudent(int id);
List<student> getStudentListByDate(String date);
List<student> getStudentListWhereEntity(student student);
List<student>getStudentListWhereMap(Map<String, String>map);
List<student> getStudentListWhereParam(@Param(value = "name") String name, @Param(value = "sex") String sex, @Param(value = "birthday") Date birthdar, @Param(value = "classes") classes classes);
}
studentMapper.xml
<?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.mybatis.dao.studentMapper" >
<resultMap id="StudentResultMap" type="com.mybatis.model.student" >
<id column="student_id" property="student_id" jdbcType="INTEGER" />
<result column="student_name" property="student_name" jdbcType="VARCHAR" />
<result column="student_sex" property="student_sex" jdbcType="VARCHAR" />
<result column="student_birthday" property="student_birthday" jdbcType="DATE" />
<result column="class_id" property="class_id" jdbcType="INTEGER" />
</resultMap>
<sql id="selectStudentAll">
select * from student
</sql>
<select id="getStudentByClassID" parameterType="int" resultMap="StudentResultMap">
<include refid="selectStudentAll"/>
where student.class_id = #{class_id}
</select>
<select id="getStudentById" parameterType="int" resultMap="StudentResultMap">
select *
from student
where student.student_id = #{student_id}
</select>
<!-- 插入学生 -->
<insert id="insertStudent" parameterType="student">
insert into student (student_id,
student_name,
student_sex,
student_birthday,
class_id)
value(#{student_id},
#{student_name},
#{student_sex},
#{student_birthday},
#{class_id})
</insert>
<!-- 更新学生信息 -->
<update id="updateStudent" parameterType="student">
update student
set student.student_name = #{student_name},
student.student_sex = #{student_sex},
student.student_birthday = #{student_birthday},
student.class_id = #{class_id}
where student.student_id = #{student_id};
</update>
<!-- 删除学生 -->
<delete id="deleteStudent" parameterType="int">
delete from student where student_id = #{student_id}
</delete>
<!-- 查询学生list，根据入学时间 -->
<select id="getStudentListByDate" parameterType="String" resultMap="StudentResultMap">
select *
from student st left join classes ct on st.class_id = ct.class_id
where ct.class_year = #{class_year};
</select>
<!-- 查询学生list，like姓名、=性别，参数entity类型 -->
<select id="getStudentListWhereEntity" parameterType="student" resultMap="StudentResultMap">
select * from student st
where st.student_name like concat(concat('%', #{student_name}),'%')
and st.student_sex = #{student_sex}
</select>
<!-- 查询学生list，=性别，参数map类型 -->
<select id="getStudentListWhereMap" parameterType="Map" resultMap="StudentResultMap">
select * from student st
where st.student_name like concat(concat('%', #{name}),'%')
and st.student_sex = #{sex}
</select>
<!-- 查询学生list，like姓名、=性别、=生日、=班级，多参数方式 -->
<select id="getStudentListWhereParam" resultMap="StudentResultMap">
select * from student st
<where>
<if test="name!=null and name!='' ">
st.student_name like concat(concat('%', #{name}),'%')
</if>
<if test="sex!= null and sex!= '' ">
and st.student_sex= #{sex}
</if>
<if test="birthday!=null">
and st.student_birthday = #{birthday}
</if>
<if test="classes=null and classes.class_id !=null and classes.class_id!=' ' ">
and st.class_id = #{classes.class_id}
</if>
</where>
</select>
</mapper>
注意：在接口处定义参数名后在xml中可以直接调用，
<include refid="selectStudentAll"/>
直接调用sql 拼接成完整的sql语句
testController
package com.mybatis.controller;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.print.attribute.HashAttributeSet;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.mybatis.model.classes;
import com.mybatis.model.student;
@Controller
public class TestController {
@Autowired
private com.mybatis.dao.studentMapper studentMapper;
@Autowired
private com.mybatis.dao.classesMapper classesMapper;
@RequestMapping(value = "/nv/update" ,method=RequestMethod.GET)
public ResponseEntity<?> indexPage() {
student student=studentMapper.getStudentById(1);
student.setStudent_name("王小明");
studentMapper.updateStudent(student);
return new ResponseEntity<String>(HttpStatus.OK);
}
@RequestMapping(value = "/nv/save" ,method=RequestMethod.GET)
public ResponseEntity<?> test2() {
student student=new student();
student.setClass_id(1);
student.setStudent_birthday(new Date());
student.setStudent_name("student3");
student.setStudent_sex("男");
studentMapper.insertStudent(student);
return new ResponseEntity<String>(HttpStatus.OK);
}
@RequestMapping(value = "/nv/delete" ,method=RequestMethod.GET)
public ResponseEntity<?> test3() {
studentMapper.deleteStudent(1);
return new ResponseEntity<String>(HttpStatus.OK);
}
@RequestMapping(value = "/nv/findStudents" ,method=RequestMethod.GET)
public ResponseEntity<?> test4() {
List<student>students=studentMapper.getStudentByClassID(1);
for (student student : students) {
System.out.println(student.getStudent_name());
}
return new ResponseEntity<String>(HttpStatus.OK);
}
@RequestMapping(value = "/nv/findStudentsByClassYear" ,method=RequestMethod.GET)
public ResponseEntity<?> test5() {
List<student>students=studentMapper.getStudentListByDate("2009");
for (student student : students) {
System.out.println(student.getStudent_name());
}
return new ResponseEntity<String>(HttpStatus.OK);
}
@RequestMapping(value = "/nv/getStudentListWhereEntity" ,method=RequestMethod.GET)
public ResponseEntity<?> test6() {
student student=new student();
student.setStudent_name("2");
student.setStudent_sex("男");
List<student>students=studentMapper.getStudentListWhereEntity(student);
for (student student2 : students) {
System.out.println(student2.getStudent_name());
}
return new ResponseEntity<String>(HttpStatus.OK);
}
@RequestMapping(value = "/nv/getStudentListWhereMap" ,method=RequestMethod.GET)
public ResponseEntity<?> test7() {
Map<String, String>map=new HashMap<String, String>();
map.put("name", "2");
map.put("sex", "男");
List<student>students=studentMapper.getStudentListWhereMap(map);
for (student student2 : students) {
System.out.println(student2.getStudent_name());
}
return new ResponseEntity<String>(HttpStatus.OK);
}
@RequestMapping(value = "/nv/getStudentListWhereParam" ,method=RequestMethod.GET)
public ResponseEntity<?> test8() {
classes classes=new classes();
classes.setClass_id(1);
List<student>students=studentMapper.getStudentListWhereParam("2", "男", null, classes);
for (student student2 : students) {
System.out.println(student2.getStudent_name());
}
return new ResponseEntity<String>(HttpStatus.OK);
}
}