NamedParameterJdbcTemple与RowMapper实现

NamedParameterJdbcTemplate和JdbcTemplate功能基本差不多。

 1、配置

db.properties

1 jdbc.user=root2 jdbc.password=1234563 jdbc.driverClass=com.mysql.jdbc.Driver4 jdbc.jdbcUrl=jdbc\:mysql\:///test

 

applicationContext.xml

 1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4     xmlns:aop="http://www.springframework.org/schema/aop" 5     xmlns:context="http://www.springframework.org/schema/context" 6     xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd 7         http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd 8         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd"> 9 10     <context:property-placeholder location="classpath:db.properties"/>11     <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">12         <property name="user" value="${jdbc.user}"></property>13         <property name="password" value="${jdbc.password}"></property>14         <property name="driverClass" value="${jdbc.driverClass}"></property>15         <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>16     </bean>17     18     <!-- NamedParameterJdbcTemplate有一个带有DataSource的构造器 -->19     <bean id="namedParameterJdbcTemplate" class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate">20         <constructor-arg ref="dataSource"></constructor-arg>21     </bean>22 </beans>

 

2、RowMapper实现对象关系映射查询

public class UserDaoImpl implements UserDao{    @Resourceprivate NamedParameterJdbcTemplate namedParameterJdbcTemplate;private RowMapper<User> userRowMapper = new RowMapper<User>(){@Overridepublic User mapRow(ResultSet rs,int rowNum) throws SQLException{User user = new User();user.setId = rs.getString("id");user.setUserName = rs.getString("userName");user.setPassword = rs.getString("password");return user;}}public List<User> getUserList(String userName){String sql = "SELECT * FROM t_user where userName = :userName";Map<String,Object> map = new HashMap<String,Object>();map.put("userName",userName);return namedParameterJdbcTemplate.query(sql,map,userRowMapper);}}

3、实现更新与对象设置属性

Java代码

 1 //启动IoC容器 2 ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext.xml"); 3  4 NamedParameterJdbcTemplate namedParameterJdbcTemplate=ctx.getBean(NamedParameterJdbcTemplate.class); 5 //为变量名称前面加上冒号 6 String sql="insert into user (name,deptid) values (:name,:deptid)"; 7 //定义map集合，其参数名称为sql语句中变量的名称 8 Map<String,Object> paramMap=new HashMap<String,Object>(); 9 paramMap.put("name", "caoyc");10 paramMap.put("deptid", 2);11 namedParameterJdbcTemplate.update(sql, paramMap);

方式二:

 1 //启动IoC容器 2 ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext.xml"); 3  4 NamedParameterJdbcTemplate namedParameterJdbcTemplate=ctx.getBean(NamedParameterJdbcTemplate.class); 5 //为变量名称前面加上冒号 6 String sql="insert into user (name,deptid) values (:name,:deptid)"; 7 //定义个实体类 8 User user=new User(); 9 user.setName("zhh");10 user.setDeptid(3);11 12 SqlParameterSource paramSource=new BeanPropertySqlParameterSource(user);13 namedParameterJdbcTemplate.update(sql, paramSource);

 

Reference：

[1] 追风-, Spring 中的 RowMapper, http://blog.csdn.net/yajunren/article/details/10103035
[2] HappyBKs, Spring框架笔记（二十五）——NamedParameterJdbcTemplate与具名参数, https://my.oschina.net/happyBKs/blog/497798
[3] JustDo, Spring NamedParameterJdbcTemplate详解, http://www.cnblogs.com/caoyc/p/5630957.html