使用Spring IOC/DI完成对user_info表的CURD
一、数据库部分
1、创建数据库
- 创建会员数据库
create database if not exists user_db;
2、创建表
- 创建会员表
create table if not exists user_info(
u_id int auto_increment comment '会员编号',
u_name varchar(32) not null comment '会员姓名',
u_regdate date not null comment '入会日期',
u_money double default 1.0 comment '入会金额',
constraint pk_userinfo_uid primary key(u_id)
)engine=innodb default charset='utf8';
二、Java部分
1、实体类
package com.gaj.entity;
import java.util.Date;
/**
* UserInfo实体类
* JavaBean
* 对应user_db数据库的user_info表
* 对应字段 u_id,u_name,u_regdate,u_money
* @author Jan
*
*/
public class UserInfo {
private Integer uid; // 会员编号
private String uname; // 会员姓名
private Date regDate; // 入会日期
private Double money; // 入会金额
public Integer getUid() {
return uid;
}
public void setUid(Integer uid) {
this.uid = uid;
}
public String getUname() {
return uname;
}
public void setUname(String uname) {
this.uname = uname;
}
public Date getRegDate() {
return regDate;
}
public void setRegDate(Date regDate) {
this.regDate = regDate;
}
public Double getMoney() {
return money;
}
public void setMoney(Double money) {
this.money = money;
}
@Override
public String toString() {
return "UserInfo [uid=" + uid + ", uname=" + uname + ", regDate=" + regDate + ", money=" + money + "]";
}
}
2、DAO层接口
package com.gaj.dao;
import java.sql.SQLException;
import java.util.List;
import com.gaj.entity.UserInfo;
/**
* 数据访问层接口
* @author Jan
*
*/
public interface UserDAO {
public int insertUser(UserInfo user) throws SQLException;
public int updateUser(UserInfo user) throws SQLException;
public int deleteUser(UserInfo user) throws SQLException;
public UserInfo findUserById(Integer uid) throws SQLException;
public List<UserInfo> findUsersByPage(Integer start, Integer size) throws Exception;
public int usersCount() throws SQLException;
}
3、DAO层实现类
package com.gaj.dao.impl;
import java.sql.SQLException;
import java.util.List;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import org.apache.commons.dbutils.handlers.ScalarHandler;
import com.gaj.dao.UserDAO;
import com.gaj.entity.UserInfo;
public class UserDaoImpl implements UserDAO {
private QueryRunner qr;
// spring用set方法注入该属性
public void setQr(QueryRunner qr) {
this.qr = qr;
}
@Override
public int insertUser(UserInfo user) throws SQLException {
// 定义返回值
int count = 0;
// 编写sql语句
String sql = "insert into user_info values(null,?,?,?)";
// 占位符赋值
Object [] params = {
user.getUname(), user.getRegDate(), user.getMoney()};
// 执行sql
count = qr.update(sql, params);
//返回
return count;
}
@Override
public int updateUser(UserInfo user) throws SQLException {
// 定义返回值
int count = 0;
// 编写sql语句
String sql = "update user_info set u_name=?,u_regdate=?,u_money=? where u_id=?";
// 占位符赋值
Object[] params = {
user.getUname(), user.getRegDate(), user.getMoney(), user.getUid()};
// 执行sql
count = qr.update(sql, params);
// 返回
return count;
}
@Override
public int deleteUser(UserInfo user) throws SQLException {
// 定义返回值
int count = 0;
// 编写sql语句
String sql = "delete from user_info where u_id=?";
// 占位符赋值
Object param = user.getUid();
// 执行sql
count = qr.update(sql, param);
// 返回
return count;
}
@Override
public UserInfo findUserById(Integer uid) throws SQLException {
// 定义返回值
UserInfo user = null;
// 编写sql语句
String sql = "select u_id uid, u_name uname, u_regdate regDate, u_money money from user_info where u_id=?";
// 占位符赋值
Object param = uid;
// 执行sql
user = qr.query(sql, new BeanHandler<UserInfo>(UserInfo.class), param);
// 返回
return user;
}
@Override
public List<UserInfo> findUsersByPage(Integer start, Integer size) throws SQLException {
// 定义返回值
List<UserInfo> users = null;
// 编写sql语句
String sql = "select u_id uid, u_name uname, u_regdate regDate, u_money money from user_info limit ?,?";
// 占位符赋值
Object[] params = {
start, size};
// 执行sql
users = qr.query(sql, new BeanListHandler<UserInfo>(UserInfo.class), params);
// 返回
return users;
}
@Override
public int usersCount() throws SQLException {
// 定义返回值
int totalCount = 0;
// 编写sql语句
String sql = "select count(1) from user_info";
// 执行sql
Number num = qr.query(sql, new ScalarHandler<Number>(1));
// 转换
totalCount = num.intValue();
// 返回
return totalCount;
}
}
4、Service层接口
package com.gaj.service;
import java.sql.SQLException;
import java.util.List;
import com.gaj.entity.UserInfo;
/**
* 业务层接口
* @author Jan
*
*/
public interface UserService {
public int insertUser(UserInfo user) throws SQLException;
public int updateUser(UserInfo user) throws SQLException;
public int deleteUser(UserInfo user) throws SQLException;
public UserInfo findUserById(Integer uid) throws SQLException;
public List<UserInfo> findUsersByPage(Integer pageIndex, Integer pageSize) throws Exception;
public int UsersCount() throws SQLException;
}
5、Service层实现类
package com.gaj.service.impl;
import java.sql.SQLException;
import java.util.List;
import com.gaj.dao.UserDAO;
import com.gaj.entity.UserInfo;
import com.gaj.service.UserService;
/**
* 业务层实现类
* @author Jan
*
*/
public class UserServiceImpl implements UserService {
private UserDAO userDAO;
// spring用set方法注入该属性
public void setUserDAO(UserDAO userDAO) {
this.userDAO = userDAO;
}
@Override
public int insertUser(UserInfo user) throws SQLException {
return userDAO.insertUser(user);
}
@Override
public int updateUser(UserInfo user) throws SQLException {
return userDAO.updateUser(user);
}
@Override
public int deleteUser(UserInfo user) throws SQLException {
return userDAO.deleteUser(user);
}
@Override
public UserInfo findUserById(Integer uid) throws SQLException {
return userDAO.findUserById(uid);
}
@Override
public List<UserInfo> findUsersByPage(Integer pageIndex, Integer pageSize) throws Exception {
// 创建返回值
List<UserInfo> list = null;
if(pageIndex != null && pageSize != null){
if(pageIndex > 0 && pageSize > 0){
int start = (pageIndex - 1) * pageSize;
int size = pageSize;
list = userDAO.findUsersByPage(start, size);
}
}
// 返回
return list;
}
@Override
public int UsersCount() throws SQLException {
return userDAO.usersCount();
}
}
三、XML部分
1、applicationContext.xml
<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.xsd">
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://127.0.0.1:3306/user_db?characterEncoding=utf-8" />
<property name="username" value="root" />
<property name="password" value="root" />
bean>
<bean id="qr" class="org.apache.commons.dbutils.QueryRunner" scope="prototype">
<constructor-arg name="ds" ref="dataSource" />
bean>
<bean id="userDAO" class="com.gaj.dao.impl.UserDaoImpl">
<property name="qr" ref="qr" />
bean>
<bean id="userService" class="com.gaj.service.impl.UserServiceImpl">
<property name="userDAO" ref="userDAO" />
bean>
beans>
四、测试CURD
1、QueryRunner测试
测试scope属性
package com.gaj.test;
import org.apache.commons.dbutils.QueryRunner;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class QueryRunnerTest {
public static void main(String[] args) {
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
System.out.println(context);
QueryRunner qr1 = context.getBean(QueryRunner.class);
QueryRunner qr2 = context.getBean(QueryRunner.class);
System.out.println(qr1);
System.out.println(qr2);
}
}
2、CURD测试
package com.gaj.test;
import java.sql.SQLException;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Random;
import java.util.Scanner;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.gaj.entity.UserInfo;
import com.gaj.service.UserService;
/**
* 测试类
* 测试Spring版JDBC的增删改查
* @author Jan
*
*/
public class SpringTest {
private ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
private UserService userService = (UserService) context.getBean("userService");
Scanner scanner = new Scanner(System.in);
Random random = new Random();
DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
@Test
public void addBatchTest() throws SQLException{
UserInfo user = null;
for (int i = 1; i <= 100; i++) {
user = new UserInfo();
user.setUname("用户" + i);
user.setRegDate(new Date(System.currentTimeMillis() + 1000*60*60*24*random.nextInt(366)));
user.setMoney(random.nextInt(50000) + 0D);
int count = userService.insertUser(user);
System.out.println(count>0 ? "添加成功！" : "添加失败！");
}
}
@Test
public void addTest() throws ParseException, SQLException{
UserInfo user = new UserInfo();
System.out.println("请输入会员姓名：");
user.setUname(scanner.next());
System.out.println("请输入入会时间：");
user.setRegDate(df.parse(scanner.next()));
System.out.println("请输入入会金额：");
user.setMoney(scanner.nextDouble());
int count = userService.insertUser(user);
System.out.println(count>0 ? "添加成功！" : "添加失败！");
}
@Test
public void updateTest() throws SQLException, ParseException{
System.out.println("请输入要更新的会员编号：");
int uid = scanner.nextInt();
UserInfo user = userService.findUserById(uid);
System.out.println("请输入会员姓名：");
user.setUname(scanner.next());
System.out.println("请输入入会时间：");
user.setRegDate(df.parse(scanner.next()));
System.out.println("请输入入会金额：");
user.setMoney(scanner.nextDouble());
int count = userService.updateUser(user);
System.out.println(count>0 ? "更新成功！" : "更新失败！");
}
@Test
public void deleteTest() throws SQLException{
System.out.println("请输入要删除的会员编号：");
int uid = scanner.nextInt();
UserInfo user = userService.findUserById(uid);
int count = userService.deleteUser(user);
System.out.println(count>0 ? "删除成功！" : "删除失败！");
}
@Test
public void QueryTest() throws Exception{
// 总条数
int totalCount = userService.UsersCount();
// 页容量
int pageSize = 10;
// 总页数
int totalPage = totalCount % pageSize == 0 ? totalCount/pageSize : totalCount/pageSize+1;
for(int i = 1; i <= totalPage; i++){
int pageIndex = i;
System.out.println("总条数：" + totalCount + "\t\t页容量：" + pageSize + "\t\t总页数" + totalPage + "\t\t当前页：" + pageIndex);
List<UserInfo> users = userService.findUsersByPage(pageIndex, pageSize);
for (UserInfo userInfo : users) {
System.out.println(userInfo);
}
}
}
}