ibatis学习之搭建Java项目

driver=com.mysql.jdbc.Driverurl=jdbc:mysql://127.0.0.1:3306/testusername=rootpassword=root

<?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>	<!-- 引用JDBC属性的配置文件 -->	<properties resource="com/ligang/SqlMap.properties"/>	<!-- 使用JDBC的事务管理 -->	<transactionManager type="JDBC">		<!-- 数据源 -->		<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>	<!-- 这里可以写多个实体的映射文件 -->	<sqlMap resource="com/ligang/Student.xml"/></sqlMapConfig>

<?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>	<!-- 通过typeAlias使得我们在下面使用Student实体类的时候不需要写包名 -->	<typeAlias alias="Student" type="com.ligang.Student"/>		<!-- id表示select里的sql语句，resultClass表示返回结果的类型 -->	<select id="findAll" resultClass="Student">		select * from student	</select>	<!-- parameterClass表示参数的内容 -->	<select id="findByID" parameterClass="String" resultClass="Student">		select * from student where id = #id#	</select>		<insert id="insertStudent" parameterClass="Student">		insert into Student(id,name,age,address) values(#id#,#name#,#age#,#address#)		<!-- 返回自动增长值 -->		<selectKey resultClass="String" keyProperty="id">			select @@identity as inserted		</selectKey>	</insert>	<delete id="deleteStudentByID" parameterClass="String">		delete from student where id = #id#	</delete>	<delete id="deleteStudent" parameterClass="Student">		delete from Student where id = #id#	</delete>	<update id="updateStudent" parameterClass="Student">		update student set name=#name#,age=#age#,address=#address# where id = #id#	</update>	<!-- 模糊查询，使用$代替#。此种方法就是去掉了类型检查，使用字符串连接，不过可能会有sql注入风险-->	<select id="selectByLike" parameterClass="String" resultClass="Student">		select * from student where name like '%$name$%'	</select>	<!-- 多条件组合查询 -->	<!-- 方法一(对象构造查询参数) -->	<!-- 项目中在写ibatis中的sql语句时，where user_id in (#user_id_list# )，运行时总是不行，这里不该用#，而应该用$，区别如下：		1.#是把传入的数据当作字符串，如#user_id_list#传入的是1,2,则sql语句生成是这样，in ('1,2') ,当然不可以		2.$传入的数据直接生成在sql里，如#user_id_list#传入的是1,2,则sql语句生成是这样，in(1,2) 这就对了． 		3.#方式能够很大程度防止sql注入． 		4.$方式无法方式sql注入． 		5.$方式一般用于传入数据库对象．例如传入表名. 		6.一般能用#的就别用$. 		直观的说 		#str# 出来的效果是 'str' 		$str$ 出来的效果是 str 		另外 ##只能用在特定的几个地方 $$可以用在任何地方 比如 order by $str$ 		你甚至可以直接写 $str$ 把 order by 这个字串放在str里传进来 -->	<select id="findByCon1" parameterClass="Student" resultClass="Student">		select * from student where name like '%$name$%' and age >= #age#	</select>	<!-- 方法二(map封装查询参数) -->	<parameterMap class="java.util.HashMap" id="paramMap">		<parameter property="name"/>		<parameter property="age"/>	</parameterMap>	<select id="findByCon2" parameterMap="paramMap" resultClass="Student">		select * from student where name like ? and age >= ?	</select></sqlMap>

package com.ligang;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.ibatis.common.resources.Resources;import com.ibatis.sqlmap.client.SqlMapClient;import com.ibatis.sqlmap.client.SqlMapClientBuilder;public class StudentDaoImpl implements StudentDao {	public static SqlMapClient sqlMapClient = null;	static{		try {			Reader reader = Resources.getResourceAsReader("com/ligang/SqlMapConfig.xml");			sqlMapClient = SqlMapClientBuilder.buildSqlMapClient(reader);		} catch (IOException e) {			e.printStackTrace();		}	}	public List<Student> findAll() {		List<Student> list = null;		try {			list = sqlMapClient.queryForList("findAll");		} catch (SQLException e) {			e.printStackTrace();		}		return list;	}	public Student findByID(String id){		Student student = null;		try {			 student = (Student) sqlMapClient.queryForObject("findByID", id);		} catch (SQLException e) {			e.printStackTrace();		}		return student;	}	public void addStudent(Student student){		try {			sqlMapClient.insert("insertStudent",student);		} catch (SQLException e) {			e.printStackTrace();		}	}	public void deleteStudentByID(String id){		try {			sqlMapClient.delete("deleteStudentByID",id);		} catch (SQLException e) {			e.printStackTrace();		}	}	public void deleteStudent(Student student){		try {			sqlMapClient.delete("deleteStudent",student);		} catch (SQLException e) {			e.printStackTrace();		}	}	public void updateStudent(Student student){		try {			sqlMapClient.update("updateStudent", student);		} catch (SQLException e) {			e.printStackTrace();		}	}	public List<Student> findByCon(String name){		List<Student> stuList = new ArrayList<Student>();		try {			stuList = sqlMapClient.queryForList("selectByLike",name);		} catch (SQLException e) {			e.printStackTrace();		}		return stuList;	}	public List<Student> findByCon(Student student){		List<Student> stuList = new ArrayList<Student>();		try {			stuList = sqlMapClient.queryForList("findByCon1",student);		} catch (SQLException e) {			e.printStackTrace();		}		return stuList;	}	public List<Student> findByCon(Map map){		List<Student> stuList = new ArrayList<Student>();		try {			stuList = sqlMapClient.queryForList("findByCon2",map);		} catch (SQLException e) {			e.printStackTrace();		}		return stuList;	}}