这是一个关于交易记录的web项目，使用Spring+Springmcv框架 银泰网机试题 2.程序设计与解释 2.1程序设计思路： 1） …

deal2/META-INF/MANIFEST.MF

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+Manifest-Version: 1.0
+Class-Path: 
+

deal2/WEB-INF/classes/applicationContext.xml

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+<?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:mvc="http://www.springframework.org/schema/mvc"
+	xmlns:context="http://www.springframework.org/schema/context"
+	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
+	xsi:schemaLocation="http://www.springframework.org/schema/beans 
+		http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
+		http://www.springframework.org/schema/mvc 
+		http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 
+		http://www.springframework.org/schema/context 
+		http://www.springframework.org/schema/context/spring-context-3.2.xsd 
+		http://www.springframework.org/schema/aop 
+		http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 
+		http://www.springframework.org/schema/tx 
+		http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">
+	<!-- 包扫描器，扫描所以@Service类 -->
+	<context:component-scan base-package="com.wendell.dealServiceImpl,com.wendell.dealDaoImpl"/>
+</beans>

deal2/WEB-INF/classes/business.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+
+<deals> 
+  <deal id="41020238-2367-4c45-b0a5-9e35615a9231"> 
+    <date>2015-11-24</date>  
+    <state>0</state>  
+    <type>1</type>  
+    <money>86.5</money>  
+    <currency>1</currency>  
+    <userId>001</userId>  
+    <userName>zhangsan</userName> 
+  </deal>  
+  <deal id="3eca016c-b8c6-4ba3-9527-eaf27d9d0d58"> 
+    <date>2015-11-24</date>  
+    <state>0</state>  
+    <type>1</type>  
+    <money>86.5</money>  
+    <currency>1</currency>  
+    <userId>002</userId>  
+    <userName>success1</userName> 
+  </deal>  
+  <deal id="67341d7d-6908-44e5-9384-13e5e66f0a9a"> 
+    <date>2015-11-24</date>  
+    <state>0</state>  
+    <type>1</type>  
+    <money>86.5</money>  
+    <currency>2</currency>  
+    <userId>003</userId>  
+    <userName>success2</userName> 
+  </deal>  
+  <deal id="109999c8-05d0-453d-93a6-40539400091d"> 
+    <date>2015-11-24</date>  
+    <state>0</state>  
+    <type>1</type>  
+    <money>86.5</money>  
+    <currency>1</currency>  
+    <userId>004</userId>  
+    <userName>success3</userName> 
+  </deal>   
+  <deal id="2c7326a8-08eb-4638-b0e0-80e61c9edae1"> 
+    <date>2015-11-24</date>  
+    <state>1</state>  
+    <type>1</type>  
+    <money>-86.5</money>  
+    <currency>1</currency>  
+    <userId>006</userId>  
+    <userName>fail1</userName> 
+  </deal>  
+  <deal id="acbbcaa0-dadb-4e5e-8f0d-9b107e9044a8">
+    <date>2015-11-24</date>
+    <state>1</state>
+    <type>1</type>
+    <money>0</money>
+    <currency>1</currency>
+    <userId>007</userId>
+    <userName>fail2</userName>
+  </deal>
+</deals>

deal2/WEB-INF/classes/com/wendell/controller/DealController.java

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+package com.wendell.controller;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.List;
+import java.util.UUID;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.servlet.ModelAndView;
+
+import com.wendell.dealService.DealService;
+import com.wendell.domain.Deal;
+
+/**
+ * 交易controller层
+ * @author Wendell
+ *
+ */
+@Controller
+@RequestMapping("/rest")
+public class DealController {
+
+    //注入DealService对象
+	@Autowired
+	private DealService dealService;
+
+	//使用springmvc向外提供Rest风格服务
+	@RequestMapping(value="/addDeal",method=RequestMethod.POST)
+	@ResponseBody
+	public ModelAndView makeDeal(Deal deal){
+
+		try {
+			//设置交易记录ID
+			deal.setId(UUID.randomUUID().toString());
+			//设置交易记录时间
+			SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
+			String dateFormat = simpleDateFormat.format(new Date());
+			deal.setDate(dateFormat);
+			//设置交易状态
+			if(Double.valueOf(deal.getMoney())<=0){
+				//如果交易金额为负数，则交易失败
+				deal.setState(String.valueOf(1));
+			}else{
+				//否则交易成功
+				deal.setState(String.valueOf(0));
+			}
+			//保存交易记录
+			dealService.addDeal(deal);
+			ModelAndView view = new ModelAndView();
+			view.setViewName("success");
+			return view;
+		} catch (Exception e) {
+			e.printStackTrace();
+			throw new RuntimeException("添加交易记录失败！");
+		}
+	}
+
+	//对外提供查询交易记录的接口
+	@RequestMapping(value="/getDeals/{state}",method=RequestMethod.GET)
+	@ResponseBody
+	public List<Deal> getDealList(@PathVariable String state){
+		List<Deal> dealList = dealService.getDealList(state);
+		return dealList;
+
+	}
+
+
+}

deal2/WEB-INF/classes/com/wendell/dealDao/BusinessDao.java

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+package com.wendell.dealDao;
+
+import java.util.List;
+
+import com.wendell.domain.Deal;
+
+public interface BusinessDao {
+	//保存交易记录到business.xml中
+    void saveDeal(Deal deal);
+    //根据交易状态查询交易信息
+    List<Deal> getDealList(String state);
+}

deal2/WEB-INF/classes/com/wendell/dealDaoImpl/BusinessDaoImpl.java

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+package com.wendell.dealDaoImpl;
+
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.UnsupportedEncodingException;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import org.dom4j.Document;
+import org.dom4j.DocumentException;
+import org.dom4j.Element;
+import org.dom4j.io.OutputFormat;
+import org.dom4j.io.SAXReader;
+import org.dom4j.io.XMLWriter;
+import org.springframework.stereotype.Repository;
+
+import com.wendell.dealDao.BusinessDao;
+import com.wendell.domain.Deal;
+/**
+ * 对business.xml操作的DAO实现类
+ * @author Wendell
+ *
+ */
+@Repository
+public class BusinessDaoImpl implements BusinessDao{
+
+	//保存交易信息到business.xml中
+	public void saveDeal(Deal deal) {
+       //获得xml数据源的文档对象
+		Document dc = getDocument();
+	   //获得根元素deals
+		Element deals = dc.getRootElement();
+	   //在根元素下增加deal子元素并添加id属性
+		Element dealEle = deals.addElement("deal").addAttribute("id", deal.getId());
+	   //为deal增加其他子元素
+		dealEle.addElement("date").addText(deal.getDate());
+		dealEle.addElement("state").addText(deal.getState());
+		dealEle.addElement("type").addText(deal.getType());
+		dealEle.addElement("money").addText(deal.getMoney());
+		dealEle.addElement("currency").addText(deal.getCurrency());
+		dealEle.addElement("userId").addText(deal.getUserId());
+		dealEle.addElement("userName").addText(deal.getUserName());
+	   //将修改后的内容写回到xml文件中
+		saveDocument(dc);
+
+
+	}
+	//通过交易状态查询交易记录
+	public List<Deal> getDealList(String state) {
+        //得到document对象
+		Document document = getDocument();
+		//定义xpath
+		String xpath = "/deals/deal";
+		//根据xpath找到所有的元素
+		List<Element> elements = document.selectNodes(xpath);
+		//判断集合是否为空
+		if(elements==null){
+			return Collections.EMPTY_LIST;
+		}
+		List<Deal> dealList = new ArrayList<Deal>();
+		for(Element element:elements){
+			Deal deal = ele2deal(element);
+			if(deal.getState().equals(state)){
+				dealList.add(deal);
+			}
+		}
+		return dealList;
+	}
+	//---------以下是抽取通用方法-------------------------
+	//获得文档对象
+	private Document getDocument(){
+		try {
+			//创建解析器
+			SAXReader reader = new SAXReader();
+			//获得xml的资源流，交给解析器解析，得到Document对象
+			String path = getXmlPath();
+			InputStream fis = new FileInputStream(path);
+			Document document = reader.read(fis);
+			//关闭资源流
+			fis.close();
+			//返回Document对象
+			return document;
+		} catch (Exception e) {
+			e.printStackTrace();
+			throw new RuntimeException("读取xml文件失败！");
+
+		} 
+
+	}
+	//获得xml文件的路径
+	private String getXmlPath(){
+		URL url = BusinessDaoImpl.class.getResource("/business.xml");
+		String path = url.getPath();
+		return path;
+	}
+	//将document写回到xml文件中
+	private void saveDocument(Document dc){
+		try {
+			//准备输出到xml文件中的输出流
+			  String path = getXmlPath();
+			  FileOutputStream os = new FileOutputStream(path);
+			//创建outputFormat
+			  OutputFormat format = OutputFormat.createPrettyPrint();
+			//创建XmlWriter
+			  XMLWriter writer = new XMLWriter(os, format);
+			//写入
+			  writer.write(dc);
+			//关闭资源
+			  os.close();
+			  writer.close();
+		} catch (Exception e) {
+			e.printStackTrace();
+			throw new RuntimeException("文件写入失败！");
+		} 
+	}
+	//将元素封装到Deal中
+	public Deal ele2deal(Element dealEle){
+		Deal deal = new Deal();
+		//封装交易记录ID
+		String id = dealEle.attributeValue("id");
+		deal.setId(id);
+		//封装用户ID
+		String userId = dealEle.elementText("userId");
+		deal.setUserId(userId);
+		//封装用户名
+		String userName = dealEle.elementText("userName");
+		deal.setUserName(userName);
+		//封装交易金额
+		String money = dealEle.elementText("money");
+		deal.setMoney(money);
+		//封装交易类型
+		String type = dealEle.elementText("type");
+		deal.setType(type);
+		//封装交易时间
+		String date = dealEle.elementText("date");
+		deal.setDate(date);
+		//封装交易状态
+		String state = dealEle.elementText("state");
+		deal.setState(state);
+		//封装交易币种
+		String currency = dealEle.elementText("currency");
+		deal.setCurrency(currency);
+		return deal;
+	}
+
+
+
+
+}

deal2/WEB-INF/classes/com/wendell/dealService/DealService.java

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+package com.wendell.dealService;
+
+import java.util.List;
+
+import com.wendell.domain.Deal;
+
+public interface DealService {
+	//增加交易记录
+    void addDeal(Deal deal);
+   //获得交易记录
+    List<Deal> getDealList(String state);
+}

deal2/WEB-INF/classes/com/wendell/dealServiceImpl/DealServiceImpl.java

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+package com.wendell.dealServiceImpl;
+
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import com.wendell.dealDao.BusinessDao;
+import com.wendell.dealService.DealService;
+import com.wendell.domain.Deal;
+/**
+ * 交易Service层
+ * @author Wendell
+ *
+ */
+@Service
+public class DealServiceImpl implements DealService {
+	//注入DealDao实现类
+	@Autowired
+	private BusinessDao businessDao;
+    //增加交易记录
+	public void addDeal(Deal deal) {
+        businessDao.saveDeal(deal);
+	}
+	//获得交易记录
+	public List<Deal> getDealList(String state) {
+        List<Deal> dealList = businessDao.getDealList(state);
+		return dealList;
+	}
+
+}