c3p0+spring3+mybatis3的整合配置檔案示例
環境描述:
mybatis的jar包:mybatis-3.1.1.jar(mybatis自身功能包),mybatis-spring-1.1.1.jar(mybatis和spring的整合包)
c3p0的jar包:c3p0-0.9.1.jar。
首先配置好mybatis的*Mapper.xml檔案:
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="org.jston.sql.interfaces.EasyMapper"> <resultMap id="Easymap" type="org.jston.entity.Easy"> <!--id對映 --> <id property="eid" column="eid" /> <!--普通屬性對映 --> <result property="ename" column="ename" /> <result property="epassword" column="epassword" /> </resultMap> <select id="getById" parameterType="int" resultMap="Easymap"> select * from Easy where eid = #{id} </select> </mapper>
上述程式碼描述了一張表對映到mybatis中的基本結構,resultMap節點的type屬性是資料庫表所對應的實體類,<id>節點則是描述資料庫作為標識列對映到Java實體類對應的欄位。<result>則是一般欄位。<select />顧名思義,是配置一個查詢。
Java實體類如下:
package org.jston.entity; public class Easy { private Integer eid; private String ename; private String epassword; public Integer getEid() { return eid; } public void setEid(Integer eid) { this.eid = eid; } public String getEname() { return ename; } public void setEname(String ename) { this.ename = ename; } public String getEpassword() { return epassword; } public void setEpassword(String epassword) { this.epassword = epassword; } }
現在對mybatis的Mapper配置實體類應該Ok了,接下來就是Configration.xml了,這是mybatis的主配置檔案,由於現在要將spring和mybatis整合,所以mybatis的主配置檔案的意義只是用來管理mybatis的Mapper.xml檔案而已,具體內容如下:
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <mappers> <mapper resource="resouce/EasyMapper.xml" /> </mappers> </configuration>
只需要配置一下Mapper即可,關於datasource的配置在spring中配置。
到此mybatis的簡單配置就Ok了。
下面就是配置spring的application.xml檔案了
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd"> <!-- dataSource --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"> <property name="driverClass" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"></property> <property name="jdbcUrl" value="jdbc:sqlserver://localhost:1433; DatabaseName=ey"></property> <property name="user" value="mybatis"></property> <property name="password" value="mybatis"></property> </bean> <!-- 使用spring的會話管理 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="configLocation" value="classpath:Configration.xml" /> </bean> <!-- 使用spring的事務管理 --> <bean name="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <!-- 配置當出現Exception、RuntimeException、Exception時採用對應的事務操作 --> <tx:advice id="userTxAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="delete*" propagation="REQUIRED" read-only="false" rollback-for="java.lang.Exception" no-rollback-for="java.lang.RuntimeException" /> <tx:method name="insert*" propagation="REQUIRED" read-only="false" rollback-for="java.lang.RuntimeException" /> <tx:method name="update*" propagation="REQUIRED" read-only="false" rollback-for="java.lang.Exception" /> <tx:method name="find*" propagation="SUPPORTS" /> <tx:method name="get*" propagation="SUPPORTS" /> <tx:method name="select*" propagation="SUPPORTS" /> </tx:attributes> </tx:advice> </beans>
以上就是spring和mybatis的配置檔案整合示例。
接下來就是呼叫Mybatis上面配置好德select語句了~
先建立一個Dao介面:
package org.jston.sql.interfaces; import org.jston.entity.Easy; public interface EasyMapper { public Easy getById(int id); }
回頭看看上面的mybatis的*Mapper.xml檔案就會發現,Mapper節點的type屬性和現在定義的Dao介面型別一致,並且<select>節點的id和這個介面的方法名也一致,意味著等下我們可以通過呼叫這個介面的getById方法來呼叫mybatis對應的Sql語句。
main方法測試程式碼:
package org.jston.mybatis; import java.io.IOException; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import org.apache.ibatis.session.defaults.DefaultSqlSessionFactory; import org.jston.entity.Easy; import org.jston.sql.interfaces.EasyMapper; import org.springframework.context.support.ClassPathXmlApplicationContext; public class Mybatis_Test { public static void main(String[] args) throws IOException { //載入spring的配置檔案 ClassPathXmlApplicationContext app = new ClassPathXmlApplicationContext( "applicationContext.xml"); //得到mybatis的SqlSessionFactory SqlSessionFactory obj = (SqlSessionFactory) app.getBean( "sqlSessionFactory", DefaultSqlSessionFactory.class); //建立mybatis的SqlSession SqlSession ses = obj.openSession(); //得到在mybatis的*Mapper.xml檔案中配置好的Mapper節點 EasyMapper mapper = ses.getMapper(EasyMapper.class); //呼叫mybatis的Id為getById對應的Sql語句 Easy easy = mapper.getById(1); //列印輸出 System.out.println(easy.getEname()); } }