spring-springmvc-jdbc小案例

此案例是为ssm作铺垫的。

创建一个银行账户和基金账户，然后通过银行账户购买基金。由spring、springmvc、spring自带的c3p0实现。

废话不多说。如下

涉及到的 jar包(多了)：

dao层：

package com.bjsxt.dao;
 
import com.bjsxt.pojo.Account;
 
public interface IAccountDao {
    //新增
    void insertAccount(String aname,double balance);
    //更新
    void updateAccount(Account account);
}

package com.bjsxt.dao;
 
import com.bjsxt.pojo.Fund;
 
public interface IFundDao {
    //新增
    void insertFund(String fname,int amount);
    //更新
    void updateFund(Fund fund);
}

package com.bjsxt.dao.impl;
 
import org.springframework.jdbc.core.support.JdbcDaoSupport;
import org.springframework.stereotype.Repository;
 
import com.bjsxt.dao.IAccountDao;
import com.bjsxt.pojo.Account;
 
@Repository
public class AccountDaoImpl extends JdbcDaoSupport implements IAccountDao {
    //新增
    @Override
    public void insertAccount(String aname, double balance) {
        String sql="insert into account(aname,balance) values(?,?)";
        this.getJdbcTemplate().update(sql, aname,balance);
    }
    //更新
    @Override
    public void updateAccount(Account account) {
        String sql="update account set balance=balance-? where aname=?";
        this.getJdbcTemplate().update(sql, account.getMoney(),account.getAname());
    }
 
}

package com.bjsxt.dao.impl;
 
import org.springframework.jdbc.core.support.JdbcDaoSupport;
import org.springframework.stereotype.Repository;
 
import com.bjsxt.dao.IFundDao;
import com.bjsxt.pojo.Fund;
 
@Repository
public class FundDaoImpl extends JdbcDaoSupport implements IFundDao {
    //新增
    @Override
    public void insertFund(String fname, int amount) {
        String sql="insert into fund(fname,amount) values(?,?)";
        this.getJdbcTemplate().update(sql, fname,amount);
    }
    //更新
    @Override
    public void updateFund(Fund fund) {
        String sql = "update fund set amount=amount+? where fname=?";
        this.getJdbcTemplate().update(sql, fund.getCount(),fund.getFname());
    }
 
}

handlers层：

package com.bjsxt.handlers;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
 
import com.bjsxt.pojo.Account;
import com.bjsxt.pojo.Fund;
import com.bjsxt.service.FundService;
 
//后端控制器
@Controller
@Scope("prototype")
@RequestMapping("/springmvc")
public class FundController{
    @Autowired
    private FundService fundService;
 
    public FundService getFundService() {
        return fundService;
    }
 
    public void setFundService(FundService fundService) {
        this.fundService = fundService;
    }
 
    @RequestMapping("/buyFund")
    public String  buyFund(Account account,Fund fund){
        fundService.modify(account, fund);
        return "welcome";
    }
 
}

pojo层：

package com.bjsxt.pojo;
 
public class Account {
    private String aname;
    private double money;
    public String getAname() {
        return aname;
    }
    public void setAname(String aname) {
        this.aname = aname;
    }
    public double getMoney() {
        return money;
    }
    public void setMoney(double money) {
        this.money = money;
    }
    public Account() {
        super();
        // TODO Auto-generated constructor stub
    }
    public Account(String aname, double money) {
        super();
        this.aname = aname;
        this.money = money;
    }
    @Override
    public String toString() {
        return "Account [aname=" + aname + ", money=" + money + "]";
    }
 
}

package com.bjsxt.pojo;
 
public class Fund {
    private String fname;
    private int count;
    public String getFname() {
        return fname;
    }
    public void setFname(String fname) {
        this.fname = fname;
    }
    public int getCount() {
        return count;
    }
    public void setCount(int count) {
        this.count = count;
    }
    public Fund() {
        super();
        // TODO Auto-generated constructor stub
    }
    public Fund(String fname, int count) {
        super();
        this.fname = fname;
        this.count = count;
    }
    @Override
    public String toString() {
        return "Fund [fname=" + fname + ", count=" + count + "]";
    }
 
}

service层：

package com.bjsxt.service;
 
import com.bjsxt.pojo.Account;
import com.bjsxt.pojo.Fund;
 
public interface FundService {
    //新增银行账户
    void addAccount(Account account);
    //新增基金账户
    void addFund(Fund fund);
    //更新（购买基金）
    void modify(Account account,Fund fund);
}

package com.bjsxt.service.impl;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
 
import com.bjsxt.dao.IAccountDao;
import com.bjsxt.dao.IFundDao;
import com.bjsxt.pojo.Account;
import com.bjsxt.pojo.Fund;
import com.bjsxt.service.FundService;
 
@Service
public class FundServiceImpl implements FundService {
    @Autowired
    private IAccountDao accountDao;
    @Autowired
    private IFundDao fundDao;
 
    public IAccountDao getAccountDao() {
        return accountDao;
    }
    public void setAccountDao(IAccountDao accountDao) {
        this.accountDao = accountDao;
    }
    public IFundDao getFundDao() {
        return fundDao;
    }
    public void setFundDao(IFundDao fundDao) {
        this.fundDao = fundDao;
    }
    //新增银行账户
    @Override
    public void addAccount(Account account) {
        accountDao.insertAccount(account.getAname(), account.getMoney());
    }
    //新增基金账户
    @Override
    public void addFund(Fund fund) {
        fundDao.insertFund(fund.getFname(), fund.getCount());
    }
    //购买基金（更新）
    @Override
    public void modify(Account account, Fund fund) {
        accountDao.updateAccount(account);
        fundDao.updateFund(fund);
    }
 
}

src下的配置文件：

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:///test
jdbc.username=root
jdbc.password=victor

<?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:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">
    <!-- 加载jdbc属性文件 -->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    <!-- c3p0数据源 -->
    <bean id="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>
    <!-- 注册dao -->
    <bean id="accountDaoImpl" class="com.bjsxt.dao.impl.AccountDaoImpl">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <bean id="fundDaoImpl" class="com.bjsxt.dao.impl.FundDaoImpl">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!-- 注册组件扫描器 -->
    <context:component-scan base-package="com.bjsxt.dao.impl"></context:component-scan>
    <context:component-scan base-package="com.bjsxt.service.impl"></context:component-scan>
</beans>

<?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:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">
    <!-- 注册组件扫描器 -->
    <context:component-scan base-package="com.bjsxt.handlers"></context:component-scan>
    <!-- 注册注解驱动 -->
    <mvc:annotation-driven/>
    <!-- 注册视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/jsp/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
 
    <!-- 静态资源无法访问第三种解决方案 -->
    <mvc:resources location="/images/" mapping="/images/**"></mvc:resources>
    <mvc:resources location="/js/" mapping="/js/**"></mvc:resources>
</beans>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>springmvc--primary</display-name>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <!-- 指定spring配置文件的路径及名称 -->
  <context-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring.xml</param-value>
  </context-param>
  <!-- 注册 ContextLoaderListener：监听ServletContext,当其初始化时，创建spring容器对象-->
  <listener>
      <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!-- 注册字符编码过滤器 -->
  <filter>
      <filter-name>CharacterEncodingFilter</filter-name>
      <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
      <init-param>
          <param-name>encoding</param-name>
          <param-value>utf-</param-value>
      </init-param>
      <init-param>
          <param-name>forceEncoding</param-name>
          <param-value>true</param-value>
      </init-param>
  </filter>
  <filter-mapping>
      <filter-name>CharacterEncodingFilter</filter-name>
      <url-pattern>/*</url-pattern>
  </filter-mapping>
  <!-- 注册springmvc前端控制器（中央调度器） -->
  <servlet>
      <servlet-name>springmvc</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <!-- 指定springmvc配置文件的路径以及名称 -->
      <init-param>
          <param-name>contextConfigLocation</param-name>
          <param-value>classpath:springmvc.xml</param-value>
      </init-param>
  </servlet>
  <servlet-mapping>
      <servlet-name>springmvc</servlet-name>
      <url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
    <form action="${pageContext.request.contextPath}/springmvc/buyFund" method="POST">
        银行账户名称：<input type="text" name="aname"><br/>
        金额：<input type="text" name="money"><br/>
        基金账户名称：<input type="text" name="fname"><br/>
        数量：<input type="text" name="count"><br/>
        <input type="submit" value="提交"><br/>
    </form>
</body>
</html>