一个简单的iBatis入门例子

一个简单的iBatis入门例子，用ORACLE和Java测试

目录结构：





1.导入iBatis和oracle驱动。

2.创建类Person.java

package com.ibeats;

import java.util.Date;

public class Person {

private int id;

private String firstName;

private String lastName;

private double weightInKilograms;

private double heightInMeters;

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public String getFirstName() {

return firstName;

}

public void setFirstName(String firstName) {

this.firstName = firstName;

}

public String getLastName() {

return lastName;

}

public void setLastName(String lastName) {

this.lastName = lastName;

}

public double getWeightInKilograms() {

return weightInKilograms;

}

public void setWeightInKilograms(double weightInKilograms) {

this.weightInKilograms = weightInKilograms;

}

public double getHeightInMeters() {

return heightInMeters;

}

public void setHeightInMeters(double heightInMeters) {

this.heightInMeters = heightInMeters;

}

}

3.配置文件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">

<sqlMapConfig>

<properties resource="com/ibeats/db.properties" />

<settings

cacheModelsEnabled="true"

enhancementEnabled="true"

lazyLoadingEnabled="true"

maxRequests="32"

maxSessions="10"

maxTransactions="5"

useStatementNamespaces="false"

/>

<transactionManager type="JDBC" >

<dataSource type="SIMPLE">

<property name="JDBC.Driver" value="${driver}"/>

<property name="JDBC.ConnectionURL" value="${url}"/>

<property name="JDBC.Username" value="${user}"/>

<property name="JDBC.Password" value="${password}"/>

</dataSource>

</transactionManager>

<sqlMap resource="com/ibeats/Person.xml" />

</sqlMapConfig>

(文件元素说明：

resource：属性列表配置文件，以便用于数据库连接参数设置。

settings:

cacheModelsEnabled:数据高速缓存，提高程序性能，利用LRU(最近最久未使用)方法对使用过的数据保存在内存中。默认true

enhancementEnabled:指定是否用cglib中那些已优化的类来提高延迟加载的性能。默认ture

lazyLoadingEnabled:延迟加载，除非绝对需要，否则推迟加载的技术。默认true

maxRequests(已废弃):一次最多有多少个请求，默认为512

maxSessions(已废弃):任何时候只允许会话数，默认128

maxTransactions(已废弃):事务最大数目，默认32

useStatementNamespaces:在引用已映射语句时，是否需要使用限定名。默认false

transactionManager：处理所有的数据库事务。

dataSoutce:数据源工厂

property:配置项

sqlMap：配置SQLMAP文件

typeAlias:定义别名)

4.配置文件person.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 namespace="Person">

<!-- Use primitive wrapper type (e.g. Integer) as parameter and allow results to

be auto-mapped results to Person object (Java Bean) properties -->

<select id="getPerson" parameterClass="int" resultClass="com.ibeats.Person">

SELECT PER_ID as id,

PER_FIRST_NAME as firstName,

PER_LAST_NAME as lastName,

PER_WEIGHT_KG as weightInKilograms,

PER_HEIGHT_M as heightInMeters

FROM PERSON

WHERE PER_ID = #id#

</select>

</sqlMap>

(文件元素说明：

parameterClass：传入参数

resultClass：传出参数

)

5.数据库配置文件db.properties

driver=oracle.jdbc.driver.OracleDriver

url=jdbc:oracle:thin:@127.0.0.1:1521:ORACLEXC

user=scott

password=tiger

6.测试类SqlMapClient.java

package com.ibeats;

import com.ibatis.sqlmap.client.*;

import com.ibatis.common.resources.*;

import java.io.IOException;

import java.io.Reader;

import java.sql.SQLException;

import java.util.List;

public class SqlMapClient {

public static void main(String args[]) {

try {

com.ibatis.sqlmap.client.SqlMapClient sqlMap = null;

String resource = "com/ibeats/SQLMapConfig.xml";

Reader reader = Resources.getResourceAsReader (resource);

sqlMap = SqlMapClientBuilder.buildSqlMapClient(reader);

Person person =(Person)sqlMap.queryForObject("getPerson",new Integer(1));

System.out.println(person.getFirstName()); //打印

} catch (IOException e) {

e.printStackTrace();

} catch (SQLException e1){

e1.printStackTrace();

}

}

}

(说明:

queryForObject():获取一条记录。

queryForList():返回一行或多行，可用参数返回固定几行，可用分页。

)

大家只要改下数据库代码就可以在自己机器上运行了！