时间:2021-07-01 10:21:17 帮助过:22人阅读
8.接口ForumDao的内容如下
package com.mycompany.shequ.dao; public interface ForumDao { public String findNameById(int fid); }
9.在src目录中创建ForumDao的实现类ForumDaoImpl,包名(com.mycompany.shequ.dao.impl),如图所示
10.ForumDao的实现类ForumDaoImpl的内容如下
package com.mycompany.shequ.dao.impl; import org.springframework.jdbc.core.support.JdbcDaoSupport; import com.mycompany.shequ.dao.ForumDao; public class ForumDaoImpl extends JdbcDaoSupport implements ForumDao { @Override public String findNameById(int fid) { String sql = "select name from hnsq_forum where fid = ?"; String name = (String)getJdbcTemplate().queryForObject(sql, new Object[]{fid},String.class); return name; } }
11.在source目录中创建配置文件spring-datasource.xml,如图所示
12.配置文件spring-datasource.xml的内容如下
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql://localhost:3306/b_shequ_two" /> <property name="username" value="root" /> <property name="password" value="" /> </bean> </beans>
13.在source目录中创建配置文件applicationContext.xml,如图所示
14.配置文件applicationContext.xml的内容如下
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> <import resource="spring-datasource.xml" /> <bean id="forumDao" class="com.mycompany.shequ.dao.impl.ForumDaoImpl"> <property name="dataSource" ref="dataSource" /> </bean> </beans>
15.在test目录中创建ForumDaoImplTest测试类,包名(com.mycompany.shequ.dao.impl),如图所示
16.ForumDaoImplTest测试类的内容如下
package com.mycompany.shequ.dao.impl; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.mycompany.shequ.dao.ForumDao; public class ForumDaoImplTest { @Test public void testFindNameById(){ ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml"); ForumDao forumDao = (ForumDao) context.getBean("forumDao"); String name = forumDao.findNameById(30); System.out.println(name); } }
17.运行测试类中的testFindNameById方法,运行结果如图所示
本文出自 “素颜” 博客,请务必保留此出处http://suyanzhu.blog.51cto.com/8050189/1909161
Spring4-JdbcDaoSupport-查询单列
标签:spring4-jdbcdaosupport-查询单列