iBatis的基本配置+CRUD操作
首先解释一下CRUD的含义：CRUD是指在做计算处理时的增加(Create)、查询(Retrieve)（重新得到数据）、更新(Update)和删除(Delete) 基本的数据库操作
创建工程iBatisDemo
1：首先要导入关于iBatis的jar包，以及连接数据库的jar包（我用的是MySQL）
2: 创建表t_person, 建立实体类Person
create table t_person(
id int primary key auto_increment,
name varchar(50),
age int
);
public class Person {
private int id;
private String name;
private int age;
......
}
3:创建总的XML配置文件
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/Person.xml"/>
</sqlMapConfig>
l, SqlMap.properties
SqlMap.properties driver=com.mysql.jdbc.Driver url=jdbc:mysql://localhost:3306/test username=root password=1
4: 穿件实体类的XML配置文件 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"> <!-- 实体类路径和类名 --> <typeAlias type="com.gbx.Person" alias="person"/> <!-- 数据库实体类的映射 --> <resultMap id="personsResult" class="person" > <result property="id" column="id" /> <result property="name" column="name"/> <result property="age" column="age"/> </resultMap> <!-- SQL语句 --> <insert id="insertPerson" parameterClass="person"> insert into t_person( id, name, age ) values( #id#, #name#, #age# ) </insert> <select id="queryPersonById" parameterClass="int" resultClass="person"> select id, name, age from t_person where id = #id# </select> <select id="queryAll" resultMap="personsResult"> select id, name, age from t_person; </select> <update id="updatePersonById" parameterClass="person"> update t_person set name = #name#, age = #age# where id = #id# </update> <delete id="deletePersonById" parameterClass="int"> delete from t_person where id = #id# </delete> </sqlMap>
5: 写测试类
package com.gbx.dao;
import java.awt.Font;
import java.io.IOException;
import java.io.Reader;
import java.sql.SQLException;
import java.util.List;
import javax.swing.JOptionPane;
import com.gbx.Person;
import com.ibatis.common.resources.Resources;
import com.ibatis.sqlmap.client.SqlMapClient;
import com.ibatis.sqlmap.client.SqlMapClientBuilder;
public class PersonDao {
private static SqlMapClient sqlMapClient = null;
static {
try {
Reader reader = Resources.getResourceAsReader("SqlMapConfig.xml");
sqlMapClient = SqlMapClientBuilder.buildSqlMapClient(reader);
reader.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//C
public void insertPerson(Person person) throws SQLException {
sqlMapClient.insert("insertPerson", person);
}
//R
public Person queryPersonById(int id) throws SQLException {
return (Person)sqlMapClient.queryForObject("queryPersonById", id);
}
@SuppressWarnings("unchecked")
public List<Person> queryALl() throws SQLException {
return sqlMapClient.queryForList("queryAll");
}
//U
public void updatePersonById(Person person) throws SQLException {
sqlMapClient.update("updatePersonById", person);
}
//D
public void deletePersonById(int id) throws SQLException {
sqlMapClient.delete("deletePersonById", id);
}
public static void main(String args[]) {
//C
/*Person person = new Person();
person.setId(3);
person.setName("小米3");
person.setAge(57);
try {
new PersonDao().insertPerson(person);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
StringBuilder br = new StringBuilder();
br.append("添加成功！往数据中添加了如下数据：\n");
br.append("编号 " + "姓名 " + "年龄 \t\n ");
br.append(person.getId() + " " + person.getName() + " " + person.getAge() + " \n");
JOptionPane.getRootFrame().setFont(new Font("Arial", Font.BOLD, 20));
JOptionPane.showMessageDialog(null, br.toString());*/
//R
/*Person person;
try {
person = new PersonDao().queryPersonById(1);
StringBuilder br = new StringBuilder();
br.append("查询成功！往数据中添加了如下数据：\n");
br.append("编号 " + "姓名 " + "年龄 \t\n ");
br.append(person.getId() + " " + person.getName() + " " + person.getAge() + " \n");
JOptionPane.getRootFrame().setFont(new Font("Arial", Font.BOLD, 20));
JOptionPane.showMessageDialog(null, br.toString());
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
List<Person> persons = new PersonDao().queryALl();
for (Person p : persons) {
System.out.println(p.getId() + " " +p.getName() + " " + p.getAge());
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}*/
//U
/*Person p = new Person();
p.setName("哈哈");
p.setAge(100);
p.setId(1);//表示修改1号
try {
new PersonDao().updatePersonById(p);
System.out.println("修改成功");
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}*/
//D
try {
new PersonDao().deletePersonById(3);
System.out.println("删除成功。。");
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}