java面试要点---ibatiS框架的使用方法介绍---随时更新

1.ibatIS的基本使用方法,这里通过一个例子来学习

a.创梦技术qq交流群：CreDream：251572072

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a.新建IbatisTest项目

/IbatisTest/src/com/credream/test/testimpl.java

package com.credream.test;

import java.sql.Date;

import com.credream.IStudentDao;

import com.credream.IStudentDaoImpl;

import com.credream.Student;

public class testimpl {

public static void main(String[] args) {

IStudentDao dao=new IStudentDaoImpl();

//测试queryAllStudent()方法

/*for (Student student:dao.queryAllStudent()) {

System.out.println(student);

}*/

//测试queryStudentById()方法

/*System.out.println("id is 1:"+dao.queryStudentById(1));*/

//测试addStudent(Student student) 方法

/*Student student=new Student();

student.setSid(4);

student.setSname("xushu");

student.setMajor("games");

student.setBirth(Date.valueOf("2012-12-22"));

student.setScore((float) 18.5);

dao.addStudent(student);*/

//测试delteStudentById(int id)方法

//dao.delteStudentById(3);

//测试updateStudentById(Student student) 方法;

/*Student student=new Student();

student.setSid(4);

student.setSname("xushen");

student.setMajor("games");

student.setBirth(Date.valueOf("2012-12-22"));

student.setScore((float) 18.5);

dao.updateStudentById(student);*/

//测试queryStudentByName(String name)方法

/*List<Student> students=dao.queryStudentByName("x");

for(Student student:students){

System.out.println(student);

}*/

//测试:addStudentBySequence(Student student) 方法

Student student=new Student();

student.setSid(4);

student.setSname("xushen");

student.setMajor("games");

student.setBirth(Date.valueOf("2012-12-22"));

student.setScore((float) 18.5);

dao.addStudentBySequence(student);

}

}

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2./IbatisTest/src/com/credream/util/DButil.java

package com.credream.util;

public class DButil {

}

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3./IbatisTest/src/com/credream/IStudentDao.java

package com.credream;

import java.util.List;

public interface IStudentDao {

public void addStudent(Student student);

public void addStudentBySequence(Student student);

public void delteStudentById(int id);

public void updateStudentById(Student student);

public List<Student> queryAllStudent();

public List<Student> queryStudentByName(String name);

public Student queryStudentById(int id);

}

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4./IbatisTest/src/com/credream/IStudentDaoImpl.java

package com.credream;

import java.io.IOException;

import java.io.Reader;

import java.sql.SQLException;

import java.util.List;

import com.ibatis.sqlmap.client.SqlMapClient;

public class IStudentDaoImpl implements IStudentDao {

private static SqlMapClient sqlMapClient=null;

static{

Reader reader;

try {

reader = com.ibatis.common.resources.Resources.getResourceAsReader("com/credream/SqlMapConfig.xml");

sqlMapClient=com.ibatis.sqlmap.client.SqlMapClientBuilder.buildSqlMapClient(reader);

reader.close();

} catch (IOException e) {

e.printStackTrace();

}

}

public void addStudent(Student student) {

try {

sqlMapClient.insert("insertStudent", student);

} catch (SQLException e) {

e.printStackTrace();

}

}

public void addStudentBySequence(Student student) {

try {

//1.从数据库序列中获取主键值

//2.让student表中插入记录

sqlMapClient.insert("insertStudentBySequence", student);

System.out.println("sid="+student.getSid());

} catch (SQLException e) {

e.printStackTrace();

}

}

public void delteStudentById(int id) {

try {

System.out.println("开始删除....");

System.out.println(sqlMapClient.delete("delteStudentById", id));

System.out.println("删除成功...");

} catch (SQLException e) {

e.printStackTrace();

}

}

public List<Student> queryAllStudent() {

List<Student> studentList=null;

try {

studentList=sqlMapClient.queryForList("selectAllStudent");

} catch (SQLException e) {

e.printStackTrace();

}

return studentList;

}

public Student queryStudentById(int id) {

Student student=null;

try {

student=(Student) sqlMapClient.queryForObject("selectStudentById",id);

} catch (SQLException e) {

e.printStackTrace();

}

return student;

}

public List<Student> queryStudentByName(String name) {

List<Student> students=null;

try {

students=sqlMapClient.queryForList("queryStudentByName",name);

} catch (SQLException e) {

e.printStackTrace();

}

return students;

}

public void updateStudentById(Student student) {

try {

System.out.println(sqlMapClient.update("updateStudentById", student));

} catch (SQLException e) {

e.printStackTrace();

}

}

}

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5./IbatisTest/src/com/credream/Student.java

package com.credream;

import java.util.Date;

public class Student {

/**

* 这个地方最好不要覆盖父类的构造方法

*/

private int sid=0;

private String sname=null;

private String major=null;

private Date birth=null;

private float score=0;

public int getSid() {

return sid;

}

public void setSid(int sid) {

this.sid = sid;

}

public String getSname() {

return sname;

}

public void setSname(String sname) {

this.sname = sname;

}

public String getMajor() {

return major;

}

public void setMajor(String major) {

this.major = major;

}

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() {

String content="sid="+sid+"/sname"+sname+"tmajor:"+major+"birth:"+

birth;

return content;

}

}

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6./IbatisTest/src/com/credream/SqlMap.propertiesdriver=com.mysql.jdbc.Driver

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

username=root

password=1234

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7./IbatisTest/src/com/credream/SqlMapConfig.xml

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

<!DOCTYPE sqlMapConfig PUBLIC "-//iBATIS.com//DTD SQL Map Config 2.0//EN"

"http://www.ibatis.com/dtd/sql-map-config-2.dtd">

<!--<!DOCTYPE sqlMap PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN"

"http://ibatis.apache.org/dtd/sql-map-2.dtd">

-->

<sqlMapConfig>

<properties resource="com/credream/SqlMap.properties"/>

<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/credream/Student.xml"/>

</sqlMapConfig>

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8./IbatisTest/src/com/credream/Student.xml

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

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

<sqlMap>

<typeAlias alias="Student" type="com.credream.Student"/>

<select id="selectAllStudent" resultClass="Student">

select * from student;

</select>

<select id="selectStudentById" parameterClass="int" resultClass="Student">

select * from student where sid=#sid#

</select>

<insert id="insertStudent" parameterClass="Student">

insert into Student (sid,sname,major,birth,score)values (#sid#,#sname#,#major#,#birth#,#score#)

</insert>

<delete id="delteStudentById" parameterClass="int">

delete from student where sid=#sid#

</delete>

<update id="updateStudentById" parameterClass="student">

update Student set sname=#sname#,major=#major#,score=#score#,birth=#birth#

where sid=#sid#

</update>

<select id="queryStudentByName" parameterClass="string" resultClass="Student">

select sid,sname,major,birth,score from student where sname like '%$sname$%'

</select>

<insert id="insertStudentBySequence" parameterClass="Student">

<selectKey resultClass="int" keyProperty="sid">

select studentPKSequence.netVal from dual

</selectKey>

insert into student(sid,sname,birth,major,score)values(#sid#,#sname#,

#birth#,#major#,#score#)

</insert>

</sqlMap>

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9.G:\javalib\mysqldriver\mysql-connector-java-5.1.16-bin.jar

G:\javalib\ibatis\ibatis-2.3.0.677.jar

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2.原理理解:

a.创梦技术qq交流群：CreDream：251572072

iBATIS对于工程是不是最好的选择

iBATIS是一种数据映射工具。它的作用就在把数据库查询与对象的属性间建立映射关系。如果将要开发的工程是基于业务对象（包括映射或

数据字典对象），那么iBATIS可以算是个好的选择。当应用程序进行分层设计实现时，它更是个好的选择，这样的话，业务层就可以和用户界面

层分开。

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3.private static SqlMapClient sqlMapClient=null;

static{

Reader reader;

try {

reader = com.ibatis.common.resources.Resources.getResourceAsReader("com/credream/SqlMapConfig.xml");

sqlMapClient=com.ibatis.sqlmap.client.SqlMapClientBuilder.buildSqlMapClient(reader);

reader.close();

} catch (IOException e) {

e.printStackTrace();

}

}

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4.public void addStudent(Student student) {

try {

sqlMapClient.insert("insertStudent", student);

} catch (SQLException e) {

e.printStackTrace();

}

}

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public List<Student> queryAllStudent() {

List<Student> studentList=null;

try {

studentList=sqlMapClient.queryForList("selectAllStudent");

} catch (SQLException e) {

e.printStackTrace();

}

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