ibatis

StudentDao.java

package com.iflytek.dao;
import java.util.List;
import com.iflytek.entity.Student;

public interface StudentDao {
		/**
		 	* 添加学生信息
		 	*
		 	* @param student
		 	* 学生实体
		 	* @return 返回是否添加成功
		 	*/
			public boolean addStudent(Student student);
			/**
			 * 根据学生id删除学生信息
			 *
			 * @param id
			 * 学生id
			 * @return 删除是否成功
			 */	
			public boolean deleteStudentById(int id);
			/**
			 * 更新学生信息
			 *
			 * @param student
			 * 学生实体
			 * @return 更新是否成功
			 */
			public boolean updateStudent(Student student);
			/**
			 * 查询全部学生信息
			 *
			 * @return 返回学生列表
			 */
			public List<Student> selectAllStudent();
			/**
			 * 根据学生姓名模糊查询学生信息
			 *
			 * @param name
			 * 学生姓名
			 * @return 学生信息列表
			 */
			public List<Student> selectStudentByName(String name);
			/**
			 * 根据学生id查询学生信息
			 *
			 * @param id
			 * 学生id
			 * @return 学生对象
			 */
			public Student selectStudentById(int id);
}

　　StudentDaoImpl.java

package com.iflytek.daoimpl;

import java.io.IOException;
import java.io.Reader;
import java.sql.SQLException;
import java.util.List;

import com.ibatis.common.resources.Resources;
import com.ibatis.sqlmap.client.SqlMapClient;
import com.ibatis.sqlmap.client.SqlMapClientBuilder;
import com.iflytek.dao.StudentDao;
import com.iflytek.entity.Student;

/**
 * @author xudongwang 2011-12-31
 * 
 *         Email:xdwangiflytek@gmail.com
 * 
 */
public class StudentDaoImpl implements StudentDao {

	private static SqlMapClient sqlMapClient = null;

	// 读取配置文件
	static {
		try {
			Reader reader = Resources
					.getResourceAsReader("com/iflytek/entity/SqlMapConfig.xml");
			sqlMapClient = SqlMapClientBuilder.buildSqlMapClient(reader);
			reader.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	public boolean addStudent(Student student) {
		Object object = null;
		boolean flag = false;
		try {
			object = sqlMapClient.insert("addStudent", student);
			System.out.println("添加学生信息的返回值：" + object);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		if (object != null) {
			flag = true;
		}
		return flag;
	}

	public boolean deleteStudentById(int id) {
		boolean flag = false;
		Object object = null;
		try {
			object = sqlMapClient.delete("deleteStudentById", id);
			System.out.println("删除学生信息的返回值：" + object + "，这里返回的是影响的行数");
		} catch (SQLException e) {
			e.printStackTrace();
		}
		if (object != null) {
			flag = true;

		}
		return flag;

	}

	public boolean updateStudent(Student student) {
		boolean flag = false;
		Object object = false;
		try {
			object = sqlMapClient.update("updateStudent", student);
			System.out.println("更新学生信息的返回值：" + object + "，返回影响的行数");
		} catch (SQLException e) {
			e.printStackTrace();
		}
		if (object != null) {
			flag = true;
		}
		return flag;
	}

	public List<Student> selectAllStudent() {
		List<Student> students = null;
		try {
			students = sqlMapClient.queryForList("selectAllStudent");
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return students;
	}

	public List<Student> selectStudentByName(String name) {
		List<Student> students = null;
		try {
			students = sqlMapClient.queryForList("selectStudentByName",name);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return students;
	}

	public Student selectStudentById(int id) {
		Student student = null;
		try {
			student = (Student) sqlMapClient.queryForObject(
					"selectStudentById", id);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return student;
	}
}

　　Student.java

package com.iflytek.entity;

import java.sql.Date;

/**
 * @author xudongwang 2011-12-31
 * 
 *         Email:xdwangiflytek@gmail.com
 * 
 */
public class Student {
	// 注意这里需要保证有一个无参构造方法，因为包括Hibernate在内的映射都是使用反射的，如果没有无参构造可能会出现问题
	private int id;
	private String name;
	private Date birth;
	private float score;

	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 Date getBirth() {
		return birth;
	}

	public void setBirth(Date birth) {
		this.birth = birth;
	}

	public float getScore() {
		return score;
	}

	public void setScore(float score) {
		this.score = score;
	}

	@Override
	public String toString() {
		return "id=" + id + "\tname=" + name + "\tmajor=" + birth + "\tscore="
				+ score + "\n";
	}

}

　　SqlMap.properties

　　空

　　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>
	<!-- 引用JDBC属性的配置文件 -->
	<properties resource="com/iflytek/entity/SqlMap.properties" />
	<!-- 使用JDBC的事务管理 -->
	<transactionManager type="JDBC">
		<!-- 数据源 -->
		<dataSource type="SIMPLE">
			<property name="JDBC.Driver" value="com.mysql.jdbc.Driver" />
			<property name="JDBC.ConnectionURL" value="jdbc:mysql://localhost:3306/ibatis" />
			<property name="JDBC.Username" value="root" />
			<property name="JDBC.Password" value="000" />
		</dataSource>
	</transactionManager>
	<!-- 这里可以写多个实体的映射文件 -->
	<sqlMap resource="com/iflytek/entity/Student.xml" />
</sqlMapConfig>

　　student.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>
	<!-- 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.iflytek.entity.Student" />
	<!-- 这样以后改了sql，就不需要去改java代码了 -->
	<!-- id表示select里的sql语句，resultClass表示返回结果的类型 -->
	<select id="selectAllStudent" resultClass="Student">
		select * from
		tbl_student
	</select>
	<!-- parameterClass表示参数的内容 -->
	<!-- #表示这是一个外部调用的需要传进的参数，可以理解为占位符 -->
	<select id="selectStudentById" parameterClass="int" resultClass="Student">
		select * from tbl_student where id=#id#
	</select>	
	<!-- 注意这里的resultClass类型，使用Student类型取决于queryForList还是queryForObject -->
	<select id="selectStudentByName" parameterClass="String"
		resultClass="Student">
		select name,birth,score from tbl_student where name like
		'%$name$%'
	</select>
	<insert id="addStudent" parameterClass="Student">
		insert into
		tbl_student(name,birth,score) values
		(#name#,#birth#,#score#);
		<selectKey resultClass="int" keyProperty="id">
			select @@identity as inserted
			<!-- 这里需要说明一下不同的数据库主键的生成，对各自的数据库有不同的方式： -->
			<!-- mysql:SELECT LAST_INSERT_ID() AS VALUE -->
			<!-- mssql:select @@IDENTITY as value -->
			<!-- oracle:SELECT STOCKIDSEQUENCE.NEXTVAL AS VALUE FROM DUAL -->
			<!-- 还有一点需要注意的是不同的数据库生产商生成主键的方式不一样，有些是预先生成 (pre-generate)主键的，如Oracle和PostgreSQL。
			有些是事后生成(post-generate)主键的，如MySQL和SQL Server 所以如果是Oracle数据库，则需要将selectKey写在insert之前 -->
		</selectKey>
	</insert>
	
	<delete id="deleteStudentById" parameterClass="int">
		<!-- #id#里的id可以随意取，但是上面的insert则会有影响，因为上面的name会从Student里的属性里去查找 -->
		<!-- 我们也可以这样理解，如果有#占位符，则ibatis会调用parameterClass里的属性去赋值 -->
		delete from tbl_student where id=#id#
	</delete>
	
	<update id="updateStudent" parameterClass="Student">
		update tbl_student set
		name=#name#,birth=#birth#,score=#score# where id=#id#
	</update>
</sqlMap>

　　TestIbatis

package com.iflytek.test;

import java.sql.Date;
import java.util.List;

import com.iflytek.daoimpl.StudentDaoImpl;
import com.iflytek.entity.Student;

/**
 * @author xudongwang 2011-12-31
 * 
 *         Email:xdwangiflytek@gmail.com
 * 
 */
public class TestIbatis {

	public static void main(String[] args) {
		StudentDaoImpl studentDaoImpl = new StudentDaoImpl();

		System.out.println("测试插入");
		Student addStudent = new Student();
		addStudent.setName("李四");
		addStudent.setBirth(Date.valueOf("2011-09-02"));
		addStudent.setScore(88);
		System.out.println(studentDaoImpl.addStudent(addStudent));

		System.out.println("测试根据id查询");
		System.out.println(studentDaoImpl.selectStudentById(1));

		System.out.println("测试模糊查询");
		List<Student> mohuLists = studentDaoImpl.selectStudentByName("李");
		for (Student student : mohuLists) {
			System.out.println(student);
		}

		System.out.println("测试查询所有");
		List<Student> students = studentDaoImpl.selectAllStudent();
		for (Student student : students) {
			System.out.println(student);
		}

		System.out.println("根据id删除学生信息");
		System.out.println(studentDaoImpl.deleteStudentById(1));

		System.out.println("测试更新学生信息");
		Student updateStudent = new Student();
		updateStudent.setId(1);
		updateStudent.setName("李四1");
		updateStudent.setBirth(Date.valueOf("2011-08-07"));
		updateStudent.setScore(21);
		System.out.println(studentDaoImpl.updateStudent(updateStudent));

	}
}