使用iBATIS3.0完成增删改查、 使用iBATIS3.0注解完成对数据库的简单操作。

转自：http://blog.csdn.net/chow__zh/article/details/7709048

使用iBATIS3.0完成增删改查

iBATIS3.0和以前的版本有一些改变，不过学过以前版本的再学习3.0应该不是太难，3.0要求JDK1.5支持，因为其中增加了注解和泛型，这些都是JDK1.5才有的。好了废话不多说，先来利用iBATIS3做下简单的增删改查吧。

首先到Apache(http://www.apache.org/)网站下载iBATIS3的jar 包，我下载的是ibatis-3-core-3.0.0.227.zip，解压后吧那个jar文件（ibatis-3-core-3.0.0.227.jar）添加到工程就可以了，还有一个文件（ibatis-3-core-src-3.0.0.227.zip）是源代码，可以用来查看源代码的，使用eclipse可以用它来关联源代码。

在MyEclipse新建一个Java Project，结构如下图



在jdbc.properties文件是映射文件要使用的，其内容如下：

Properties代码




driver=com.mysql.jdbc.Driver

url=jdbc\:mysql\://localhost\:3306/test

username=root

password=123456

SqlMapper.xml是iBATIS的配置文件，其代码如下：

Xml代码




<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE configuration

PUBLIC "-//ibatis.apache.org//DTD Config 3.0//EN"

"http://ibatis.apache.org/dtd/ibatis-3-config.dtd">

<configuration>

<properties resource="jdbc.properties"/>

<typeAliases>

<typeAlias type="cn.ibatis3.test.Person" alias="Person"/>

</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="cn/ibatis3/test/person.xml"/>

</mappers>

</configuration>

[xml] view
plaincopy

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE configuration

PUBLIC "-//ibatis.apache.org//DTD Config 3.0//EN"

"http://ibatis.apache.org/dtd/ibatis-3-config.dtd">

<configuration>

<properties resource="jdbc.properties"/>

<typeAliases>

<typeAlias type="cn.ibatis3.test.Person" alias="Person"/>

</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="cn/ibatis3/test/person.xml"/>

</mappers>

</configuration>

[xml] view
plain copy

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE configuration

PUBLIC "-//ibatis.apache.org//DTD Config 3.0//EN"

"http://ibatis.apache.org/dtd/ibatis-3-config.dtd">

<configuration>

<properties resource="jdbc.properties"/>

<typeAliases>

<typeAlias type="cn.ibatis3.test.Person" alias="Person"/>

</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="cn/ibatis3/test/person.xml"/>

</mappers>

</configuration>

上面文件中的sql映射文件person.xml代码如下：

Xml代码




<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE mapper

PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN"

"http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd">

<!-- -->

<mapper namespace="cn.ibatis3.test.PersonMapper">

<select id="selectPerson" parameterType="java.lang.Integer"

resultType="Person">

select * from person where id = #{id}

</select>

<select id="selectAll" resultType="Person">

select * from person

</select>

<select id="selectPersonsByName" resultType="Person" parameterType="String">

select * from person where name like #{name}

</select>

<insert id="insertPerson" parameterType="Person">

insert into person(name,birthday,sex)

values(#{name},#{birthday},#{sex})

</insert>

<delete id="deletePerson" parameterType="Person">

delete from person where id=#{id}

</delete>

<update id="updatePerson" parameterType="Person">

update person set name=#{name},birthday=#{birthday},sex=#{sex}

where id=#{id}

</update>

</mapper>

[xml] view
plaincopy

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE mapper

PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN"

"http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd">

<!-- -->

<mapper namespace="cn.ibatis3.test.PersonMapper">

<select id="selectPerson" parameterType="java.lang.Integer"

resultType="Person">

select * from person where id = #{id}

</select>

<select id="selectAll" resultType="Person">

select * from person

</select>

<select id="selectPersonsByName" resultType="Person" parameterType="String">

select * from person where name like #{name}

</select>

<insert id="insertPerson" parameterType="Person">

insert into person(name,birthday,sex)

values(#{name},#{birthday},#{sex})

</insert>

<delete id="deletePerson" parameterType="Person">

delete from person where id=#{id}

</delete>

<update id="updatePerson" parameterType="Person">

update person set name=#{name},birthday=#{birthday},sex=#{sex}

where id=#{id}

</update>

</mapper>

[xml] view
plain copy

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE mapper

PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN"

"http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd">

<!-- -->

<mapper namespace="cn.ibatis3.test.PersonMapper">

<select id="selectPerson" parameterType="java.lang.Integer"

resultType="Person">

select * from person where id = #{id}

</select>

<select id="selectAll" resultType="Person">

select * from person

</select>

<select id="selectPersonsByName" resultType="Person" parameterType="String">

select * from person where name like #{name}

</select>

<insert id="insertPerson" parameterType="Person">

insert into person(name,birthday,sex)

values(#{name},#{birthday},#{sex})

</insert>

<delete id="deletePerson" parameterType="Person">

delete from person where id=#{id}

</delete>

<update id="updatePerson" parameterType="Person">

update person set name=#{name},birthday=#{birthday},sex=#{sex}

where id=#{id}

</update>

</mapper>

注意：在iBATIS3中，属性parameterMap是不推荐使用的，在以后的版本可能会去掉这个属性。

Person.java的代码如下：

Java代码




package cn.ibatis3.test;

import java.util.Date;

public class Person {

private int id = 0;

private String name = "";

private String sex = "male";

private Date birthday = null;

public Person() {

}

//省略getter 和 setter 方法

@Override

public String toString() {

return "id=" + id + "\t" + "name=" + name + "\t" + "sex=" + sex + "\t"

+ "birthday=" + new java.sql.Date(birthday.getTime()).toString();

}

}

[java] view
plaincopy

package cn.ibatis3.test;

import java.util.Date;

public class Person {

private int id = 0;

private String name = "";

private String sex = "male";

private Date birthday = null;

public Person() {

}

//省略getter 和 setter 方法

@Override

public String toString() {

return "id=" + id + "\t" + "name=" + name + "\t" + "sex=" + sex + "\t"

+ "birthday=" + new java.sql.Date(birthday.getTime()).toString();

}

}

[java] view
plain copy

package cn.ibatis3.test;

import java.util.Date;

public class Person {

private int id = 0;

private String name = "";

private String sex = "male";

private Date birthday = null;

public Person() {

}

//省略getter 和 setter 方法

@Override

public String toString() {

return "id=" + id + "\t" + "name=" + name + "\t" + "sex=" + sex + "\t"

+ "birthday=" + new java.sql.Date(birthday.getTime()).toString();

}

}

iBATIS官方推荐我们使用单例模式创建一个sessionFactory，我这里也提供一个sessionFactory.java，呵呵,仅供参考：

Java代码




package cn.ibatis3.test;

import java.io.IOException;

import java.io.Reader;

import org.apache.ibatis.io.Resources;

import org.apache.ibatis.session.SqlSessionFactory;

import org.apache.ibatis.session.SqlSessionFactoryBuilder;

public final class SessionFactory {

private String resource="cn/ibatis3/test/SqlMapper.xml";

private SqlSessionFactory sqlSessionFactory=null;

private static SessionFactory sessionFactory=new SessionFactory();

private SessionFactory() {

try {

Reader reader=Resources.getResourceAsReader(resource);

sqlSessionFactory=new SqlSessionFactoryBuilder().build(reader);

} catch (IOException e) {

System.out.println("#IOException happened in initialising the SessionFactory:"+e.getMessage());

throw new ExceptionInInitializerError(e);

}

}

public static SessionFactory getInstance() {

return sessionFactory;

}

public SqlSessionFactory getSqlSessionFactory() {

return sqlSessionFactory;

}

}

[java] view
plaincopy

package cn.ibatis3.test;

import java.io.IOException;

import java.io.Reader;

import org.apache.ibatis.io.Resources;

import org.apache.ibatis.session.SqlSessionFactory;

import org.apache.ibatis.session.SqlSessionFactoryBuilder;

public final class SessionFactory {

private String resource="cn/ibatis3/test/SqlMapper.xml";

private SqlSessionFactory sqlSessionFactory=null;

private static SessionFactory sessionFactory=new SessionFactory();

private SessionFactory() {

try {

Reader reader=Resources.getResourceAsReader(resource);

sqlSessionFactory=new SqlSessionFactoryBuilder().build(reader);

} catch (IOException e) {

System.out.println("#IOException happened in initialising the SessionFactory:"+e.getMessage());

throw new ExceptionInInitializerError(e);

}

}

public static SessionFactory getInstance() {

return sessionFactory;

}

public SqlSessionFactory getSqlSessionFactory() {

return sqlSessionFactory;

}

}

[java] view
plain copy

package cn.ibatis3.test;

import java.io.IOException;

import java.io.Reader;

import org.apache.ibatis.io.Resources;

import org.apache.ibatis.session.SqlSessionFactory;

import org.apache.ibatis.session.SqlSessionFactoryBuilder;

public final class SessionFactory {

private String resource="cn/ibatis3/test/SqlMapper.xml";

private SqlSessionFactory sqlSessionFactory=null;

private static SessionFactory sessionFactory=new SessionFactory();

private SessionFactory() {

try {

Reader reader=Resources.getResourceAsReader(resource);

sqlSessionFactory=new SqlSessionFactoryBuilder().build(reader);

} catch (IOException e) {

System.out.println("#IOException happened in initialising the SessionFactory:"+e.getMessage());

throw new ExceptionInInitializerError(e);

}

}

public static SessionFactory getInstance() {

return sessionFactory;

}

public SqlSessionFactory getSqlSessionFactory() {

return sqlSessionFactory;

}

}

基于接口的编程（还有就是iBATIS3的注解也是在接口方法上的，关于注解以后有机会再讲，它也是iBATIS3的一个新特性），DAO层的接口PersonMapper.java代码如下：

Java代码




package cn.ibatis3.test;

import java.util.List;

public interface PersonMapper {

Person selectById(Integer id);

List<Person> selectAll();

List<Person> selectPersonsByName(String name);

void insert(Person person);

void delete(Person person);

void update(Person person);

}

[java] view
plaincopy

package cn.ibatis3.test;

import java.util.List;

public interface PersonMapper {

Person selectById(Integer id);

List<Person> selectAll();

List<Person> selectPersonsByName(String name);

void insert(Person person);

void delete(Person person);

void update(Person person);

}

[java] view
plain copy

package cn.ibatis3.test;

import java.util.List;

public interface PersonMapper {

Person selectById(Integer id);

List<Person> selectAll();

List<Person> selectPersonsByName(String name);

void insert(Person person);

void delete(Person person);

void update(Person person);

}

接口的实现类PersonDao.java代码如下：

Java代码




package cn.ibatis3.test;

import java.util.ArrayList;

import java.util.List;

import org.apache.ibatis.session.SqlSession;

import org.apache.ibatis.session.SqlSessionFactory;

public class PersonDao implements PersonMapper {

private SqlSessionFactory sessionFactory = SessionFactory.getInstance()

.getSqlSessionFactory();

public Person selectById(Integer id) {

Person person = new Person();

SqlSession session = null;

try {

session = sessionFactory.openSession();

person = (Person) session.selectOne(

"cn.ibatis3.test.PersonMapper.selectPerson", id);

} finally {

session.close();

}

return person;

}

@SuppressWarnings("unchecked")

public List<Person> selectAll() {

List<Person> persons = new ArrayList<Person>();

SqlSession session = null;

try {

session = sessionFactory.openSession();

persons = session

.selectList("cn.ibatis3.test.PersonMapper.selectAll");

} finally {

session.close();

}

return persons;

}

public void delete(Person person) {

SqlSession session = null;

try {

session = sessionFactory.openSession();

session.delete("cn.ibatis3.test.PersonMapper.deletePerson", person);

session.commit();

} finally {

session.close();

}

}

public void insert(Person person) {

SqlSession session = null;

try {

session = sessionFactory.openSession();

session.insert("cn.ibatis3.test.PersonMapper.insertPerson", person);

session.commit();

} finally {

session.close();

}

}

public void update(Person person) {

SqlSession session = null;

try {

session = sessionFactory.openSession();

session.insert("cn.ibatis3.test.PersonMapper.updatePerson", person);

session.commit();

} finally {

session.close();

}

}

@SuppressWarnings("unchecked")

public List<Person> selectPersonsByName(String name) {

List<Person> persons = new ArrayList<Person>();

SqlSession session = null;

try {

session = sessionFactory.openSession();

System.out.println(name);

persons = session.selectList(

"cn.ibatis3.test.PersonMapper.selectPersonsByName", "%"

+ name + "%");

session.commit();

} finally {

session.close();

}

return persons;

}

}

[java] view
plaincopy

package cn.ibatis3.test;

import java.util.ArrayList;

import java.util.List;

import org.apache.ibatis.session.SqlSession;

import org.apache.ibatis.session.SqlSessionFactory;

public class PersonDao implements PersonMapper {

private SqlSessionFactory sessionFactory = SessionFactory.getInstance()

.getSqlSessionFactory();

public Person selectById(Integer id) {

Person person = new Person();

SqlSession session = null;

try {

session = sessionFactory.openSession();

person = (Person) session.selectOne(

"cn.ibatis3.test.PersonMapper.selectPerson", id);

} finally {

session.close();

}

return person;

}

@SuppressWarnings("unchecked")

public List<Person> selectAll() {

List<Person> persons = new ArrayList<Person>();

SqlSession session = null;

try {

session = sessionFactory.openSession();

persons = session

.selectList("cn.ibatis3.test.PersonMapper.selectAll");

} finally {

session.close();

}

return persons;

}

public void delete(Person person) {

SqlSession session = null;

try {

session = sessionFactory.openSession();

session.delete("cn.ibatis3.test.PersonMapper.deletePerson", person);

session.commit();

} finally {

session.close();

}

}

public void insert(Person person) {

SqlSession session = null;

try {

session = sessionFactory.openSession();

session.insert("cn.ibatis3.test.PersonMapper.insertPerson", person);

session.commit();

} finally {

session.close();

}

}

public void update(Person person) {

SqlSession session = null;

try {

session = sessionFactory.openSession();

session.insert("cn.ibatis3.test.PersonMapper.updatePerson", person);

session.commit();

} finally {

session.close();

}

}

@SuppressWarnings("unchecked")

public List<Person> selectPersonsByName(String name) {

List<Person> persons = new ArrayList<Person>();

SqlSession session = null;

try {

session = sessionFactory.openSession();

System.out.println(name);

persons = session.selectList(

"cn.ibatis3.test.PersonMapper.selectPersonsByName", "%"

+ name + "%");

session.commit();

} finally {

session.close();

}

return persons;

}

}

[java] view
plain copy

package cn.ibatis3.test;

import java.util.ArrayList;

import java.util.List;

import org.apache.ibatis.session.SqlSession;

import org.apache.ibatis.session.SqlSessionFactory;

public class PersonDao implements PersonMapper {

private SqlSessionFactory sessionFactory = SessionFactory.getInstance()

.getSqlSessionFactory();

public Person selectById(Integer id) {

Person person = new Person();

SqlSession session = null;

try {

session = sessionFactory.openSession();

person = (Person) session.selectOne(

"cn.ibatis3.test.PersonMapper.selectPerson", id);

} finally {

session.close();

}

return person;

}

@SuppressWarnings("unchecked")

public List<Person> selectAll() {

List<Person> persons = new ArrayList<Person>();

SqlSession session = null;

try {

session = sessionFactory.openSession();

persons = session

.selectList("cn.ibatis3.test.PersonMapper.selectAll");

} finally {

session.close();

}

return persons;

}

public void delete(Person person) {

SqlSession session = null;

try {

session = sessionFactory.openSession();

session.delete("cn.ibatis3.test.PersonMapper.deletePerson", person);

session.commit();

} finally {

session.close();

}

}

public void insert(Person person) {

SqlSession session = null;

try {

session = sessionFactory.openSession();

session.insert("cn.ibatis3.test.PersonMapper.insertPerson", person);

session.commit();

} finally {

session.close();

}

}

public void update(Person person) {

SqlSession session = null;

try {

session = sessionFactory.openSession();

session.insert("cn.ibatis3.test.PersonMapper.updatePerson", person);

session.commit();

} finally {

session.close();

}

}

@SuppressWarnings("unchecked")

public List<Person> selectPersonsByName(String name) {

List<Person> persons = new ArrayList<Person>();

SqlSession session = null;

try {

session = sessionFactory.openSession();

System.out.println(name);

persons = session.selectList(

"cn.ibatis3.test.PersonMapper.selectPersonsByName", "%"

+ name + "%");

session.commit();

} finally {

session.close();

}

return persons;

}

}

最后是表的创建：

Sql代码




DROP TABLE IF EXISTS `test`.`person`;

CREATE TABLE `test`.`person` (

`id` int(10) unsigned NOT NULL auto_increment,

`name` varchar(20) default NULL,

`sex` varchar(8) default NULL,

`birthday` datetime default NULL,

PRIMARY KEY (`id`)

) ENGINE=InnoDB DEFAULT CHARSET=utf8;

[sql] view
plaincopy

DROP TABLE IF EXISTS `test`.`person`;

CREATE TABLE `test`.`person` (

`id` int(10) unsigned NOT NULL auto_increment,

`name` varchar(20) default NULL,

`sex` varchar(8) default NULL,

`birthday` datetime default NULL,

PRIMARY KEY (`id`)

) ENGINE=InnoDB DEFAULT CHARSET=utf8;

[sql] view
plain copy

DROP TABLE IF EXISTS `test`.`person`;

CREATE TABLE `test`.`person` (

`id` int(10) unsigned NOT NULL auto_increment,

`name` varchar(20) default NULL,

`sex` varchar(8) default NULL,

`birthday` datetime default NULL,

PRIMARY KEY (`id`)

) ENGINE=InnoDB DEFAULT CHARSET=utf8;

使用iBATIS3.0注解完成对数据库的简单操作

iBATIS3.0也增加了一些简单的注解，iBATIS3的注解只能完成一些简单操作，要进行更复杂的操作，最好是在XML文件中配置。

在数据库(本人使用的mysql)中建立一个person表：

Sql代码




DROP TABLE IF EXISTS `test`.`person`;

CREATE TABLE `test`.`person` (

`id` int(10) unsigned NOT NULL auto_increment,

`name` varchar(20) default NULL,

`sex` varchar(8) default NULL,

`birthday` datetime default NULL,

PRIMARY KEY (`id`)

) ENGINE=InnoDB DEFAULT CHARSET=utf8;

[sql] view
plaincopy

DROP TABLE IF EXISTS `test`.`person`;

CREATE TABLE `test`.`person` (

`id` int(10) unsigned NOT NULL auto_increment,

`name` varchar(20) default NULL,

`sex` varchar(8) default NULL,

`birthday` datetime default NULL,

PRIMARY KEY (`id`)

) ENGINE=InnoDB DEFAULT CHARSET=utf8;

[sql] view
plain copy

DROP TABLE IF EXISTS `test`.`person`;

CREATE TABLE `test`.`person` (

`id` int(10) unsigned NOT NULL auto_increment,

`name` varchar(20) default NULL,

`sex` varchar(8) default NULL,

`birthday` datetime default NULL,

PRIMARY KEY (`id`)

) ENGINE=InnoDB DEFAULT CHARSET=utf8;

在MyEclipse新建一个Java Project，结构如下图



在jdbc.properties文件是映射文件要使用的，其内容如下：

Properties代码




driver=com.mysql.jdbc.Driver

url=jdbc\:mysql\://localhost\:3306/test

username=root

password=123456

SqlMapper.xml是iBATIS的配置文件，其代码如下：

Xml代码




<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE configuration

PUBLIC "-//ibatis.apache.org//DTD Config 3.0//EN"

"http://ibatis.apache.org/dtd/ibatis-3-config.dtd">

<configuration>

<properties resource="jdbc.properties"/>

<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="cn/ibatis3/test/annotation/person.xml"/>

</mappers>

</configuration>

[xml] view
plaincopy

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE configuration

PUBLIC "-//ibatis.apache.org//DTD Config 3.0//EN"

"http://ibatis.apache.org/dtd/ibatis-3-config.dtd">

<configuration>

<properties resource="jdbc.properties"/>

<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="cn/ibatis3/test/annotation/person.xml"/>

</mappers>

</configuration>

[xml] view
plain copy

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE configuration

PUBLIC "-//ibatis.apache.org//DTD Config 3.0//EN"

"http://ibatis.apache.org/dtd/ibatis-3-config.dtd">

<configuration>

<properties resource="jdbc.properties"/>

<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="cn/ibatis3/test/annotation/person.xml"/>

</mappers>

</configuration>

上面文件中的sql映射文件person.xml代码如下：

Xml代码




<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE mapper

PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN"

"http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd">

<mapper namespace="cn.ibatis3.test.annotation.PersonMapper">

</mapper>

[xml] view
plaincopy

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE mapper

PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN"

"http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd">

<mapper namespace="cn.ibatis3.test.annotation.PersonMapper">

</mapper>

[xml] view
plain copy

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE mapper

PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN"

"http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd">

<mapper namespace="cn.ibatis3.test.annotation.PersonMapper">

</mapper>

注意：在iBATIS3中，命名空间（namespace）是必须的，如果不使用注解的话，名字可以自己定义。一旦使用了注解，这里必须是那个使用注解类或接口的全名。

Person.java的代码请参考我的《iBATIS3学习（一）》。

sessionFactory.java和我前面的《iBATIS3学习（一）》一样，只是注意将：

Java代码




private String resource="cn/ibatis3/test/SqlMapper.xml";

[java] view
plaincopy

private String resource="cn/ibatis3/test/SqlMapper.xml";

[java] view
plain copy

private String resource="cn/ibatis3/test/SqlMapper.xml";

Java代码




改为private String resource="cn/ibatis3/test/annotation/SqlMapper.xml";

[java] view
plaincopy

改为private String resource="cn/ibatis3/test/annotation/SqlMapper.xml";

[java] view
plain copy

改为private String resource="cn/ibatis3/test/annotation/SqlMapper.xml";

iBATIS3的注解可以定义在接口方法上的，也可以定义在类方法上，我这里定义在接口上，接口PersonMapper.java代码如下：

Java代码




package cn.ibatis3.test.annotation;

import java.util.List;

import org.apache.ibatis.annotations.CacheNamespace;

import org.apache.ibatis.annotations.Delete;

import org.apache.ibatis.annotations.Insert;

import org.apache.ibatis.annotations.Options;

import org.apache.ibatis.annotations.Select;

import org.apache.ibatis.annotations.SelectProvider;

import org.apache.ibatis.annotations.Update;

@CacheNamespace(readWrite = true)

public interface PersonMapper {

@Select("select * from person where id = #{id}")

@Options(useCache = true, flushCache = false)

Person selectById(Integer id);

@SelectProvider(type=SqlProvider.class ,method="selectAllSql")

List<Person> selectAll();

@Select("select * from person where name like #{name}")

List<Person> selectPersonsByName(String name);

@Insert( { "insert into person(name,birthday,sex)",

"values(#{name},#{birthday},#{sex})" })

void insert(Person person);

@Delete("delete from person where id=#{id}")

void delete(Person person);

@Update( {"update person set name=#{name},birthday=#{birthday},sex=#{sex}",

"where id=#{id}" })

void update(Person person);

}

[java] view
plaincopy

package cn.ibatis3.test.annotation;

import java.util.List;

import org.apache.ibatis.annotations.CacheNamespace;

import org.apache.ibatis.annotations.Delete;

import org.apache.ibatis.annotations.Insert;

import org.apache.ibatis.annotations.Options;

import org.apache.ibatis.annotations.Select;

import org.apache.ibatis.annotations.SelectProvider;

import org.apache.ibatis.annotations.Update;

@CacheNamespace(readWrite = true)

public interface PersonMapper {

@Select("select * from person where id = #{id}")

@Options(useCache = true, flushCache = false)

Person selectById(Integer id);

@SelectProvider(type=SqlProvider.class ,method="selectAllSql")

List<Person> selectAll();

@Select("select * from person where name like #{name}")

List<Person> selectPersonsByName(String name);

@Insert( { "insert into person(name,birthday,sex)",

"values(#{name},#{birthday},#{sex})" })

void insert(Person person);

@Delete("delete from person where id=#{id}")

void delete(Person person);

@Update( {"update person set name=#{name},birthday=#{birthday},sex=#{sex}",

"where id=#{id}" })

void update(Person person);

}

[java] view
plain copy

package cn.ibatis3.test.annotation;

import java.util.List;

import org.apache.ibatis.annotations.CacheNamespace;

import org.apache.ibatis.annotations.Delete;

import org.apache.ibatis.annotations.Insert;

import org.apache.ibatis.annotations.Options;

import org.apache.ibatis.annotations.Select;

import org.apache.ibatis.annotations.SelectProvider;

import org.apache.ibatis.annotations.Update;

@CacheNamespace(readWrite = true)

public interface PersonMapper {

@Select("select * from person where id = #{id}")

@Options(useCache = true, flushCache = false)

Person selectById(Integer id);

@SelectProvider(type=SqlProvider.class ,method="selectAllSql")

List<Person> selectAll();

@Select("select * from person where name like #{name}")

List<Person> selectPersonsByName(String name);

@Insert( { "insert into person(name,birthday,sex)",

"values(#{name},#{birthday},#{sex})" })

void insert(Person person);

@Delete("delete from person where id=#{id}")

void delete(Person person);

@Update( {"update person set name=#{name},birthday=#{birthday},sex=#{sex}",

"where id=#{id}" })

void update(Person person);

}

上面的注解SelectProvider使用了一个类SqlProvider.java,其代码如下：

Java代码




package cn.ibatis3.test.annotation;

public class SqlProvider {

// 动态的SQL语句，实际上应该使用iBATIS的动态SQL产生方法，这里仅仅是为了使用注解

public String selectAllSql() {

return "SELECT * FROM person p";

}

}

[java] view
plaincopy

package cn.ibatis3.test.annotation;

public class SqlProvider {

// 动态的SQL语句，实际上应该使用iBATIS的动态SQL产生方法，这里仅仅是为了使用注解

public String selectAllSql() {

return "SELECT * FROM person p";

}

}

[java] view
plain copy

package cn.ibatis3.test.annotation;

public class SqlProvider {

// 动态的SQL语句，实际上应该使用iBATIS的动态SQL产生方法，这里仅仅是为了使用注解

public String selectAllSql() {

return "SELECT * FROM person p";

}

}

接口的实现类PersonDao.java代码如下：

Java代码




package cn.ibatis3.test.annotation;

import java.util.ArrayList;

import java.util.List;

import org.apache.ibatis.session.SqlSession;

import org.apache.ibatis.session.SqlSessionFactory;

public class PersonDao implements PersonMapper {

private SqlSessionFactory sessionFactory = SessionFactory.getInstance()

.getSqlSessionFactory();

public Person selectById(Integer id) {

Person person = new Person();

SqlSession session = null;

try {

session = sessionFactory.openSession();

PersonMapper personMapper = session.getMapper(PersonMapper.class);

person = personMapper.selectById(id);

} finally {

session.close();

}

return person;

}

@SuppressWarnings("unchecked")

public List<Person> selectAll() {

List<Person> persons = new ArrayList<Person>();

SqlSession session = null;

try {

session = sessionFactory.openSession();

PersonMapper personMapper = session.getMapper(PersonMapper.class);

persons = personMapper.selectAll();

} finally {

session.close();

}

return persons;

}

public void delete(Person person) {

SqlSession session = null;

try {

session = sessionFactory.openSession();

PersonMapper personMapper = session.getMapper(PersonMapper.class);

personMapper.delete(person);

session.commit();

} finally {

session.close();

}

}

public void insert(Person person) {

SqlSession session = null;

try {

session = sessionFactory.openSession();

PersonMapper personMapper = session.getMapper(PersonMapper.class);

personMapper.insert(person);

session.commit();

} finally {

session.close();

}

}

public void update(Person person) {

SqlSession session = null;

try {

session = sessionFactory.openSession();

PersonMapper personMapper = session.getMapper(PersonMapper.class);

personMapper.update(person);

session.commit();

} finally {

session.close();

}

}

@SuppressWarnings("unchecked")

public List<Person> selectPersonsByName(String name) {

List<Person> persons = new ArrayList<Person>();

SqlSession session = null;

try {

session = sessionFactory.openSession();

PersonMapper personMapper = session.getMapper(PersonMapper.class);

persons=personMapper.selectPersonsByName("%" + name + "%");

} finally {

session.close();

}

return persons;

}

}