spring_spring管理c3po数据池（xml实现）

1.新建项目

2.导入jar

2.创建测试数据库及数据

CREATE DABABASE springjdbc
CREATE TABLE `ar_role` (
  `rid` int(10) NOT NULL AUTO_INCREMENT,
  `rname` varchar(20) DEFAULT NULL COMMENT '角色名',
  `alias` varchar(20) DEFAULT NULL COMMENT '别名',
  PRIMARY KEY (`rid`)
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of ar_role
-- ----------------------------
INSERT INTO `ar_role` VALUES ('1', '系统管理员', 'admin');
INSERT INTO `ar_role` VALUES ('2', '调度员', 'dispa');
INSERT INTO `ar_role` VALUES ('3', 'test1', 'test1');
INSERT INTO `ar_role` VALUES ('4', 'test2', 'test2');
INSERT INTO `ar_role` VALUES ('5', 'test3', 'test3');

3.编写pojo

package com.linixn.spring.pojo;

public class Role {
	private Integer rid;
	private String rname;
	private String alias;
	public Role() {
		super();
		// TODO Auto-generated constructor stub
	}
	public Integer getRid() {
		return rid;
	}
	public void setRid(Integer rid) {
		this.rid = rid;
	}
	public String getRname() {
		return rname;
	}
	public void setRname(String rname) {
		this.rname = rname;
	}
	public String getAlias() {
		return alias;
	}
	public void setAlias(String alias) {
		this.alias = alias;
	}
	@Override
	public String toString() {
		return "Role [rid=" + rid + ", rname=" + rname + ", alias=" + alias + "]";
	}
}

4.编写RoleDao以及实现类RoleDaoImpl

package com.linixn.spring.dao;

import java.util.List;

import com.linixn.spring.pojo.Role;

public interface RoleDao {
	// 添加
	void save(Role role);
	//删除
	void delete(Integer id);
	//修改
	void update(Role role);
	//单个查询
	Role getById(Integer id);
	//查询所有
	List<Role> getAll();
	//查询数据条数
	int getTotalCount();
}

package com.linixn.spring.dao;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;

import com.linixn.spring.pojo.Role;

public class RoleDaoImpl implements RoleDao{
	private JdbcTemplate jt;
	@Override
	public void save(Role role) {
		String sql= "insert into ar_role(rname,alias) values(?,?)";
		jt.update(sql,role.getRname(),role.getAlias());
	}

	@Override
	public void delete(Integer id) {
		String sql ="delete from ar_role where rid=? ";
		jt.update(sql,id);
		
	}

	@Override
	public void update(Role role) {
		String sql ="update ar_role set rname=?,alias =? where rid =?";
		jt.update(sql,role.getRname(),role.getAlias(),role.getRid());
	}

	@Override
	public Role getById(Integer id) {
		String sql ="select * from ar_role where rid=?";
		//RowMapper<Role> 匿名类的实现
		Role role=jt.queryForObject(sql, new RowMapper<Role>(){
			@Override
			public Role mapRow(ResultSet rs, int index) throws SQLException {
				return mapRowHander(rs);
			}
		},id);
		return role;
	}

	@Override
	public List<Role> getAll() {
		String sql ="select * from ar_role ";
		List<Role> list=jt.query(sql, new RowMapper<Role>(){
			@Override
			public Role mapRow(ResultSet rs, int index) throws SQLException {
				return mapRowHander(rs);
			}
		});
		return list;
	}

	@Override
	public int getTotalCount() {
		String sql ="select count(1) from ar_role";
		Integer count=jt.queryForObject(sql,Integer.class);
		return count;
	}
	//
	private Role mapRowHander(ResultSet rs) throws SQLException {
		Role role=new Role();
		role.setRid(rs.getInt("rid"));
		role.setRname(rs.getString("rname"));
		role.setAlias(rs.getString("alias"));
		return role;
	}
}

5.新建jdbc配置db.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/springjdbc
jdbc.username=root
jdbc.password=root

6.新建application.xml配置数据源

<?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:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:centext="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
		http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
		http://www.springframework.org/schema/context
		http://www.springframework.org/schema/context/spring-context-4.2.xsd
		http://www.springframework.org/schema/aop
		http://www.springframework.org/schema/aop/spring-aop-4.2.xsd ">
		<!-- 加载文件 -->
		<centext:property-placeholder location="classpath:db.properties"/>
		
		<!-- spring管理c3p0数据源 -->
		<bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
			<property name="driverClass" value="${jdbc.driver}"></property>
			<property name="jdbcUrl" value="${jdbc.url}"></property>
			<property name="user" value="${jdbc.username}"></property>
			<property name="password" value="${jdbc.password}"></property>
		</bean>
		<!-- Jdbctemplate -->
		<bean name="jdbctemplate" class="org.springframework.jdbc.core.JdbcTemplate">
			<property name="dataSource" ref="dataSource"></property>
		</bean>
		<!-- 依赖注入 -->
		<bean name="roleDao" class="com.linixn.spring.dao.RoleDaoImpl">
			<property name="jt" ref="jdbctemplate"></property>
		</bean>
</beans>

7.添加日志配置log4j.properties

# Global logging configuration
log4j.rootLogger=info, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

8.测试

package com.linixn.spring.test;

import java.util.List;

import javax.annotation.Resource;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.linixn.spring.dao.RoleDao;
import com.linixn.spring.pojo.Role;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class TestJdbctemplate {
	@Resource(name="roleDao")
	private RoleDao roleDao;
	//	添加
	@Test
	public void testSave() {
		Role role=new Role();
		role.setRname("zhangsan");
		role.setAlias("test5");
		roleDao.save(role);
	}
	// 	删除
	@Test
	public void testDelete() {
		roleDao.delete(2);
	}
	
	// 	修改
	@Test 
	public void testupdate() {
		Role role= new Role();
		role.setRid(2);
		role.setRname("wangwu");
		role.setAlias("wuwu");
		roleDao.update(role);
	}
	//查询
	@Test
	public void testSelect() {
		Role role=roleDao.getById(3);
		System.out.println(role);
	}
	//	查询
	@Test
	public void testAllSelect() {
		List<Role> roles=roleDao.getAll();
		System.out.println(roles);
	}
	@Test
	public void testCount() {
		System.out.print(roleDao.getTotalCount());
	}
}