10分钟入门MyBatis--跟我从零开始学MyBatis
1.准备MyBatis环境
1.1 create sql database
create database studentdb; use studentdb; create table student ( id int auto_increment primary key, name varchar(20) unique not null, age int not null, phone varchar(11) not null, address varchar(50) not null ); insert into student values(null,'user1',21,'13311112222','hubeiwuhan'); insert into student values(null,'user2',32,'13311113333','jiangsuchangde'); insert into student values(null,'user3',14,'13314444222','shanghaipudong'); insert into student values(null,'user4',26,'13311555522','beijingdongcheng'); insert into student values(null,'user5',31,'13317777222','wuhanxudong');
1.2 Building SqlSessionFactory from XML
<?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="com/ibatis/config/sql.properties" />
<settings>
<setting name="cacheEnabled" value="false"/>
</settings>
<typeAliases>
<typeAlias alias="Student" type="com.ibatis.entity.Student"/>
</typeAliases>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC" />
<dataSource type="POOLED">
<property name="driver" value="${driver}" />
<property name="url" value="${url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="com/ibatis/entity/maps/studentMapper.xml" />
</mappers>
</configuration>
1.3 sql.properties
driver=com.mysql.jdbc.Driver url=jdbc:mysql://localhost:3306/studentdb username=root password=123
1.4 Exploring Mapped SQL Statements
<?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.ibatis.entity.maps.StudentMapper">
<!--查询所有学生 -->
<select id="selectAllStudents" resultType="Student">
select * from Student
</select>
<!-- 根据ID查询学生 -->
<select id="selectStudentById" resultType="Student" parameterType="int">
select * from Student where id=#{id}
</select>
<!-- 添加学生 -->
<insert id="addStudent" parameterType="Student">
insert into Student(name,age,phone,address)
values (#{name},#{age},#{phone},#{address})
</insert>
<!-- 更新学生信息 -->
<update id="updateStudent" parameterType="Student">
update Student set
name=#{name},
age=#{age},
phone=#{phone},
address=#{address}
where id=#{id}
</update>
<!-- 删除学生信息 -->
<delete id="deleteStudent" parameterType="int">
delete from Student where id=#{id}
</delete>
<!-- 根据学生姓名模糊查询学生 -->
<select id="selectStudentByName" parameterType="String" resultType="Student">
select * from Student
where name like "%"#{name}"%"
</select>
</mapper>
2.Start
2.1 building entityBean
package com.ibatis.entity;
import java.io.Serializable;
@SuppressWarnings("serial")
public class Student implements Serializable {
private Integer id;
private String name;
private Integer age;
private String phone;
private String address;
public Student(){
}
public Student(String name, Integer age, String phone, String address) {
this.name = name;
this.age = age;
this.phone = phone;
this.address = address;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public String toString() {
return "id:" + this.id + " name:" + this.name + " age:" + this.age
+ " phone:" + this.phone + " address:" + this.address;
}
}
2.2 building sqlSessionFactory
String resource = "com/ibatis/config/mybatis-config.xml";
InputStream inputStream = null;
try {
inputStream = Resources.getResourceAsStream(resource);
} catch (IOException e) {
e.printStackTrace();
}
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
SqlSession session=sqlSessionFactory.openSession();
2.3 selectAllStudent
List<Student> list=session.selectList("selectAllStudents");
2.4 selectStudentById
Student student = session.selectOne("selectStudentById",id);
2.5 addStudent
this.session.insert("addStudent", student);
this.session.commit();
2.6 updateStudent
this.session.update("updateStudent", student);
this.session.commit();
2.7 deleteStudent
this.session.delete("deleteStudent", id);
this.session.commit();
2.8 selectStudentsByName
List<Student> list=session.selectList("selectStudentByName",name);
2.9 Test