Spring+SpringMVC+mybatis+easyui整合实例（二）注解方式的mybatis的使用

目录：

项目结构说明

spring整合mybatis及mybatis使用测试（注解、非注解）

一、项目结构：

其中applicationContext.xml为spring配置文件，我们先把他放在src下，用于测试mybatis

二、mybatis使用

我们使用一个简单的例子来说明一下spring中如何整合非注解形式和注解形式的mybatis，以及mybatis的测试。

首先导入spring核心jar、mybatis jar、spring整合mybatis jar

编写实体类：

@Component
public class Student {

private int id;
private String name;
private String password;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}

}

dao层的mybatis可以使用注解方式也可以使用非注解的方式，我们一一来看一下。

对于非注解形式：

在com.etoak.dao 中编写类StudentDaoIF.java

@Repository
public interface StudentDaoIF {

public int addStudent(Student stu);

public int delStudentById(int id);
public int updateStudent(Student stu);
public Student selectStudentById(int id);
public List<Student> selectAllStudents();
public int StudentCount();
public List<Student> selectStudentByPage(Map map);
}

同时在这个包下添加xml配置：

StudentDaoIF-mapper.xml

<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.etoak.dao.StudentDaoIF" >
<insert id="addStudent" parameterType="com.etoak.entity.Student">
insert into student values(null,#{name},#{password});
</insert>
<delete id="delStudentById" parameterType="java.lang.Integer">
delete from student where id=#{id};
</delete>
<update id="updateStudent" parameterType="com.etoak.entity.Student">
update student set name=#{name},password=#{password} where id=#{id};
</update>
<!--
resultMap： 返回数据类型
需要在下文中解释
-->
<select id="selectStudentById" parameterType="java.lang.Integer" resultMap="student">
select * from student where id=#{id};
</select>
<!--
这里返回的是list，但list里面存放的还是city对象，所以还是city
-->
<select id="selectAllStudents" resultMap="student">
select * from student;
</select>
<select id="selectStudentCount" resultType="java.lang.Integer">
select count(*) from student;
</select>
<select id="selectStudentByPage" parameterType="java.util.Map" resultMap="student">
select * from student limit #{start},#{max};
</select>
<!--
返回类型解释
-->
<resultMap type="com.etoak.entity.Student" id="student">
<result property="id" column="id"/>
<result property="name" column="name"/>
<result property="password" column="password"/>
</resultMap>
</mapper>

applicationContext中添加：

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd"> <context:component-scan base-package="com"></context:component-scan>
<mvc:annotation-driven />
<bean id="ssf" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="ds"></property>
<property name="mapperLocations">
<list>              <value>classpath:com/etoak/dao/StudentDaoIF-mapper.xml</value>
</list>
</property>
</bean>
<bean id="ds" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://localhost:3306/etoak"></property>
<property name="username" value="root"></property>
<property name="password" value="root"></property>
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.etoak.dao" />
<property name="sqlSessionFactoryBeanName" value="ssf"></property>
</bean>
</beans>

编写测试类：

public class TestMybatis {
public static void main(String[] args) {
ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
ac = new FileSystemXmlApplicationContext("src/applicationContext.xml");
StudentDaoIF dao = (StudentDaoIF)ac.getBean("studentDaoIF");
Student stu = (Student)ac.getBean("student");
stu.setName("a");
stu.setPassword("a1");
dao.addStudent(stu);
}
}

对于注解方式的mybatis:

需要去掉StudentDaoIF-mapper.xml配置，在StudentDaoIF接口中添加注解，同时applicationContext.xml中注释掉如下几行：

<property name="mapperLocations">
<list>
<value>classpath:com/etoak/dao/StudentDaoIF-mapper.xml</value>
</list>
</property>

添加注解的dao层接口：

@Repository
public interface StudentDaoIF {

@Insert("insert into student values(null,#{name},#{password})")
@Options(useGeneratedKeys = true , keyProperty = "id")
public int addStudent(Student stu);

@Delete("delete from student where id=#{id}")
public int delStudentById(int id);

@Update("update student set name=#{name},password=#{password} where id=#{id}")
public int updateStudent(Student stu);

@Select("select * from student where id=#{id}")
@Results({
@Result(column = "id" , property = "id"),
@Result(column = "name" , property = "name"),
@Result(column = "password" , property = "password")
})
public Student selectStudentById(int id);

@Select("select * from student")
@Results({
@Result(column = "id" , property = "id"),
@Result(column = "name" , property = "name"),
@Result(column = "password" , property = "password")
})
public List<Student> selectAllStudents();

@Select("select count(*) from student")
public int StudentCount();

@Select(" select * from student limit #{start},#{max};")
@Results({
@Result(column = "id" , property = "id"),
@Result(column = "name" , property = "name"),
@Result(column = "password" , property = "password")
})
public List<Student> selectStudentByPage(Map map);
}

我们同样可以使用之前的测试类进行测试。