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 + " name=" + name + " major=" + birth + " score="
+ score + "
";
}
}
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));
}
}