iBatis的CRUD操作详细总结

昨天晚上看了一下关于iBatis的一个讲解的视频，讲的和我的这个简单的总结差不多....

思考了一下还是把主要操作都总结一下吧，当然这里也不是全的，知识简单的CRUD。。。

首先我觉得持久层的操作主要就是这几个：

public interface IPersonDao {
	//添加
	public boolean addPerson(Person person);
	//更新
	public boolean updatePerson(Person person);
	//删除 根据ID删除， 批量删除
	public boolean deletePersonById(int id);
	public boolean deleteAll(List<Integer> ids);
	//查询，根据ID, name模糊查询, 查询所有， 多条件查询，分页查询
	public Person queryById(int id);
	public List<Person> queryByName(String name);
	public List<Person> queryAllPerson();
	public List<Person> queryPersons(Person person);
	public List<Person> queryPage(Map<String, Object> info);
}

　　

然后我们就一一实现吧。

Person类:

public class Person {
	private int id;
	private String name;
	private int age;
        //省去了getter setter
}

　　

Person.xml

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

<!DOCTYPE sqlMap
    PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN"
    "http://ibatis.apache.org/dtd/sql-map-2.dtd">

<sqlMap namespace="Person">
<!--  实体类路径和名 这里得到person是大小写不敏感的   -->
	  <typeAlias alias="person" type="com.gbx.po.Person" />

	  <!-- SQL语句 -->

	  <insert id="addPerson" parameterClass="person" >
	  <!-- 利用自增字段来填充主键    -->
	  	<selectKey resultClass="int" keyProperty="id">
	  		select LAST_INSERT_ID() as id
	  	</selectKey>
	  	insert into t_person(id,  name,   age)
	  				values(#id#, #name#, #age#)
	  </insert>

	  <update id="updatePerson" parameterClass="person">
	  	update t_person
	  	set
	  		id=#id#,
	  		name=#name#,
	  		age=#age#
	  	where
	  		id=#id#
	  </update>
	  <delete id="deletePerson" parameterClass="int">
	  	delete from t_person
	  	where
	  		id=#id#
	  </delete>

	  <delete id="deleteAllPerson" parameterClass="List">
	  	delete from t_person
	  	where
	  		id in
	  		(<iterate conjunction=",">
	  			#[]#
	  		</iterate>)
	  </delete> 

	  <select id="queryPersonById" parameterClass="int" resultClass="person">
	  	select id, name, age
	  	from t_person
	  	where
	  		id=#id#
	  </select>

	  <select id="queryPersonByName" parameterClass="String" resultClass="person">
	  	select id, name, age
	  	from t_person
	  	where
	  		name like '%$name$%'
	  </select>
	  <select id="queryAllPerson" resultClass="person" >
	  	select id, name, age
	  	from t_person
	  </select>

	  <select id="queryPersons" resultClass="person" parameterClass="person" >
	  	select id, name, age
	  	from t_person
	  	<dynamic prepend="where">
	  		<isNotEqual prepend="and"  property="id" compareValue="0">
	  			id=#id#
	  		</isNotEqual>
	  		<isNotNull prepend="and" property="name">
	  			name like '%$name$%'
	  		</isNotNull>
	  		<isGreaterEqual prepend="and" property="age" compareValue="0">
	  			age>#age#
	  		</isGreaterEqual>
	  	</dynamic>

	  </select>

	  <select id="queryPage" parameterClass="java.util.Map" resultClass="person">
	  	select id, name, age
	  	from t_person
	  	<dynamic prepend="where">
	  		<isNotEqual prepend="and"  property="id" compareValue="0">
	  			id=#id#
	  		</isNotEqual>
	  		<isNotNull prepend="and"  property="name">
	  			name like '%$name$%'
	  		</isNotNull>
	  		<isNotEqual prepend="and" property="age" compareValue="0">
	  			age>=#age#
	  		</isNotEqual>
	  	</dynamic>
	  	limit #begin#, #pageSize#
	  </select>

</sqlMap>

　　

SqlMapConfig.xml

<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE sqlMapConfig
      PUBLIC "-//ibatis.apache.org//DTD SQL Map Config 2.0//EN"
      "http://ibatis.apache.org/dtd/sql-map-config-2.dtd">

<sqlMapConfig>
<!-- 引入资源 -->
		<properties resource="SqlMap.properties"/>
<!-- 配置数据库连接信息 -->
		<transactionManager type="JDBC">
			<dataSource type="SIMPLE">
				<property name="JDBC.Driver" value="${driver}" />
				<property name="JDBC.ConnectionURL" value="${url}" />
				<property name="JDBC.Username" value="${username}" />
				<property name="JDBC.Password" value="${password}" />
			</dataSource>
		</transactionManager>

		<sqlMap resource="com/gbx/po/Person.xml"/>

</sqlMapConfig>

　　

PersonDaoImp

package com.gbx.dao;

import java.io.IOException;
import java.io.Reader;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.gbx.po.Person;
import com.ibatis.common.resources.Resources;
import com.ibatis.sqlmap.client.SqlMapClient;
import com.ibatis.sqlmap.client.SqlMapClientBuilder;

public class PersonDaoImp implements IPersonDao{

	private static SqlMapClient client = null;
	static{
		try {
			Reader reader = Resources.getResourceAsReader("SqlMapConfig.xml");
			client = SqlMapClientBuilder.buildSqlMapClient(reader);
			reader.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}
	public boolean addPerson(Person person) {
		System.out.println("添加前 " + person.getId());
		try {
			client.insert("addPerson", person);
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		System.out.println("添加后： " + person.getId());
		return true;
	}

	public boolean updatePerson(Person person) {
		try {
			client.update("updatePerson", person);
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		System.out.println("更新成功....");
		return true;
	}

	public boolean deletePersonById(int id) {
		try {
			client.delete("deletePerson", id);
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		System.out.println("删除成功....");
		return true;
	}

	public boolean deleteAll(List<Integer> ids) {
		try {
			client.delete("deleteAllPerson", ids);
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		System.out.println("删除成功....");
		return true;
	}

	public Person queryById(int id) {
		Person p = null;
		try {
			p  = (Person) client.queryForObject("queryPersonById", id);
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return p;
	}

	@SuppressWarnings("unchecked")
	public List<Person> queryByName(String name) {
		List<Person> persons = null;
		try {
			persons = client.queryForList("queryPersonByName", name);
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return persons;
	}

	@SuppressWarnings({ "unchecked", "deprecation" })
	public List<Person> queryAllPerson() {
		List<Person> persons = null;
		try {

			persons = client.queryForList("queryAllPerson");
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return persons;
	}

	@SuppressWarnings("unchecked")
	public List<Person> queryPersons(Person person) {
		List<Person> persons = null;
		try {
			persons = client.queryForList("queryPersons", person);
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return persons;
	}

	@SuppressWarnings("unchecked")
	public List<Person> queryPage(Map<String, Object> info) {
		List<Person> persons = null;
		try {
			persons = client.queryForList("queryPage", info);
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return persons;
	}

	public static void main(String[] args) {
		IPersonDao dao = new PersonDaoImp();
		//添加
//		Person person = new Person();
//		person.setName("小明");
//		person.setAge(1);
//		dao.addPerson(person);

		//更新
//		Person person = new Person();
//		person.setId(18);
//		person.setName("小明123");
//		person.setAge(1);
//		dao.updatePerson(person);

		//删除
//		dao.deletePersonById(18);
		//批量删除
//		List<Integer> ids = new ArrayList<Integer>();
//		ids.add(3); ids.add(4); ids.add(5);
//		dao.deleteAll(ids);
//		System.out.println(ids);

		//ID查询
//		Person person = new Person();
//		person = dao.queryById(19);
//		System.out.println("查询到的个人信息为:" + person.getId() + " " + person.getAge() + " " + person.getName());

		//姓名模糊查询
//		List<Person> persons = dao.queryByName("小米");
//		for (Person p : persons) {
//			System.out.println("查询到的个人信息为:" + p.getId() + " " + p.getAge() + " " + p.getName());
//		}

		//查询所有
//		List<Person> persons = dao.queryAllPerson();
//		for (Person p : persons) {
//			System.out.println("查询到的个人信息为:" + p.getId() + " " + p.getAge() + " " + p.getName());
//		}

		//多条件查询
//		Person person = new Person();
//		person.setId(0);
//		person.setName("小");
//		person.setAge(20);
//		List<Person> persons = dao.queryPersons(person);
//		for (Person p : persons) {
//			System.out.println("查询到的个人信息为:" + p.getId() + " " + p.getAge() + " " + p.getName());
//		}

		//利用Map实现模糊的分页查询
		Map<String, Object> info = new HashMap<String, Object>();
		info.put("begin", 0);
		info.put("pageSize", 100);
		info.put("id", 0);
		info.put("name", "小");
		info.put("age", 20);

		List<Person> persons = dao.queryPage(info);
		for (Person p : persons) {
			System.out.println("查询到的个人信息为:" + p.getId() + " " + p.getAge() + " " + p.getName());
		}
	}
}