struts--CRUD优化（图片上传）

1.上传方式

上传到指定文件目录，添加服务器与真实目录的映射关系，从而解耦上传文件与tomcat的关系
文件服务器

2.web代码优化

  1 package com.yuan.crud.web;
  2 
  3 import java.io.BufferedInputStream;
  4 import java.io.BufferedOutputStream;
  5 import java.io.File;
  6 import java.io.FileInputStream;
  7 import java.io.FileNotFoundException;
  8 import java.io.FileOutputStream;
  9 import java.io.IOException;
 10 import java.sql.SQLException;
 11 import java.util.List;
 12 
 13 import org.apache.commons.io.FileUtils;
 14 
 15 import com.opensymphony.xwork2.ModelDriven;
 16 import com.yuan.crud.dao.ClazzDao;
 17 import com.yuan.crud.entity.Clazz;
 18 import com.yuan.crud.util.PageBean;
 19 
 20 public class ClazzAction extends BaseAction implements ModelDriven<Clazz>{
 21 
 22     private Clazz clz = new Clazz();
 23     private ClazzDao clzdao = new ClazzDao();
 24     //这里的属性名一定要和页面上name的值对应
 25     private File file;
 26     private String fileFileName;
 27     private String fileContentType;
 28     
 29     /**
 30      * 跳转上传图片的界面
 31      * @return
 32      */
 33     public String preUpload() {
 34             try {
 35                 this.result = this.clzdao.list(clz, null).get(0);
 36             } catch (InstantiationException | IllegalAccessException | SQLException e) {
 37                 e.printStackTrace();
 38             }
 39         return "preUpload";
 40     }
 41     
 42     
 43     public String upload() {
 44         String realDir="D:/image";//保存路径尽量不要带中文，
 45         String severDir = "/upload";//读取路径
 46     try {
 47 //        FileUtils.copyFile(file, new File(realDir+"/"+fileFileName));
 48         copyFile(file, new File(realDir+"/"+fileFileName));
 49         clz.setPic(severDir+"/"+fileFileName);
 50         try {
 51             this.clzdao.edit(clz);
 52         } catch (IllegalArgumentException | IllegalAccessException | NoSuchFieldException | SecurityException
 53                 | SQLException e) {
 54             e.printStackTrace();
 55         }
 56     } catch (IOException e) {
 57         e.printStackTrace();
 58     }    
 59     return "toList";
 60 }
 61     /**
 62      * 利用缓冲流技术进行拷贝
 63      * @param source
 64      * @param target
 65      * @throws IOException 
 66      */
 67     public void copyFile(File source, File target) throws IOException{
 68         try {
 69             BufferedInputStream in = new BufferedInputStream(new FileInputStream(source));
 70             BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(target));
 71             byte[] bbuf = new byte[1024];
 72             int len =0;
 73             while((len = in.read(bbuf))!=-1) {
 74                 out.write(bbuf, 0, len);
 75             }
 76             in.close();
 77             out.close();
 78         } catch (FileNotFoundException e) {
 79             e.printStackTrace();
 80         }
 81         
 82     }
 83     
 84     
 85     
 86     /**
 87      * 查询
 88      * @return
 89      */
 90     public String list() {
 91         PageBean pageBean = new PageBean();
 92         pageBean.setRequest(request);
 93         try {
 94             List<Clazz> list = this.clzdao.list(clz, pageBean);
 95             System.out.println(list);
 96             request.setAttribute("clzList", list);
 97             request.setAttribute("pageBean", pageBean);
 98         } catch (InstantiationException | IllegalAccessException | SQLException e) {
 99             // TODO Auto-generated catch block
100             e.printStackTrace();
101         }
102         return "list";
103     }
104     
105     /**
106      * 跳转编辑页面（新增修改页面）
107      * @return
108      */
109     public String preSave() {
110         if(clz.getCid()!=0) {
111             try {
112                 this.result = this.clzdao.list(clz, null).get(0);
113             } catch (InstantiationException | IllegalAccessException | SQLException e) {
114                 // TODO Auto-generated catch block
115                 e.printStackTrace();
116             }
117         }
118         return "preSave";
119     }
120     
121     public String add() {
122         try {
123             this.code = this.clzdao.add(clz);
124         } catch (IllegalArgumentException | IllegalAccessException | NoSuchFieldException | SecurityException
125                 | SQLException e) {
126             // TODO Auto-generated catch block
127             e.printStackTrace();
128         }
129         return "toList";
130     }
131     
132     public String edit() {
133         try {
134             this.clzdao.edit(clz);
135         } catch (IllegalArgumentException | IllegalAccessException | NoSuchFieldException | SecurityException
136                 | SQLException e) {
137             // TODO Auto-generated catch block
138             e.printStackTrace();
139         }
140         return "toList";
141     }
142     
143     public String del() {
144         try {
145             this.clzdao.del(clz);
146         } catch (IllegalArgumentException | IllegalAccessException | NoSuchFieldException | SecurityException
147                 | SQLException e) {
148             // TODO Auto-generated catch block
149             e.printStackTrace();
150         }
151         return "toList";
152     }
153     
154     
155     @Override
156     public Clazz getModel() {
157         
158         return clz;
159     }
160 
161     public File getFile() {
162         return file;
163     }
164 
165     public void setFile(File file) {
166         this.file = file;
167     }
168 
169     public String getFileFileName() {
170         return fileFileName;
171     }
172 
173     public void setFileFileName(String fileFileName) {
174         this.fileFileName = fileFileName;
175     }
176 
177     public String getFileContentType() {
178         return fileContentType;
179     }
180 
181     public void setFileContentType(String fileContentType) {
182         this.fileContentType = fileContentType;
183     }
184     
185     
186     
187     
188 }

3.jsp代码

3.1 clzList.jsp

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3     <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
 4  <%@taglib prefix="z" uri="/****"%>
 5 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 6 <html>
 7 <head>
 8 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 9 <title>Insert title here</title>
10 </head>
11 <body>
12 <form action="${pageContext.request.contextPath }/sy/clz_list.action" method="post">
13 
14  班级名： <input type="text" name="cname" /><input type="submit" value="确定"/>
15  
16 </form>
17 <a href="${pageContext.request.contextPath }/sy/clz_preSave.action">新增</a>
18 <table border="1" width="100%">
19    <tr>
20        <td>编号</td>
21        <td>班级名</td>
22        <td>教员</td>
23        <td>图片</td>
24        <td>操作</td>
25    </tr>
26    
27    <c:forEach items="${clzList }" var="c">
28      <tr>
29        <td>${c.cid }</td>
30        <td>${c.cname }</td>
31        <td>${c.cteacher }</td>
32        <td>
33        <img style="height: 60px;width: 60px;" src="${pageContext.request.contextPath }${c.pic}">
34        </td>
35        <td>
36        <a href="${pageContext.request.contextPath }/sy/clz_preSave.action?cid=${c.cid}">修改</a>&nbsp;&nbsp;&nbsp;
37        <a href="${pageContext.request.contextPath }/sy/clz_del.action?cid=${c.cid}">删除</a>&nbsp;&nbsp;&nbsp;
38        <a href="${pageContext.request.contextPath }/sy/clz_preUpload.action?cid=${c.cid}">图片上传</a>&nbsp;&nbsp;&nbsp;
39        </td>
40    </tr>
41    </c:forEach>
42 </table>
43 <z:Page pageBean="${pageBean }"></z:Page> 
44 </body>
45 </html>

3.2 clzUpload.jsp

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>图片上传</title>
 8 </head>
 9 <body>
10 <form action="${pageContext.request.contextPath }/sy/clz_upload.action" method="post" enctype="multipart/form-data">
11  <input type="hidden" name="cid" value="${result.cid }"/>
12  <input type="hidden" name="cname" value="${result.cname }"/> 
13  <input type="hidden" name="cteacher" value="${result.cteacher }"/>
14  <input type="file" name="file">
15 <input type="submit" value="ok"/>
16 </form>
17 </body>
18 </html>

4.配置xml

4.1 struts-sy.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <!DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
 4     "http://struts.apache.org/dtds/struts-2.5.dtd">
 5 <struts>
 6     <package name="sy" extends="base" namespace="/sy">
 7       <action name="/hello_*" class="com.yuan.web.HelloAction" method="{1}">
 8         <result name="success">/success.jsp</result>
 9       </action>
10       
11       
12       <action name="/clz_*" class="com.yuan.crud.web.ClazzAction" method="{1}">
13         <result name="list">/clzList.jsp</result>
14         <result name="preSave">/clzEdit.jsp</result>
15         <result name="preUpload">/clzUpload.jsp</result>
16         <result name="toList" type="redirectAction">clz_list</result>
17       </action>
18     </package>
19 </struts>

4.2 server.xml 配置（在Servers项目中找到）

在最后一个Value标签后面插入：
<Context path="/T226_struts01/upload" docBase="D:/image"/>

注：path为当前项目名下的upload文件夹，docBase为图片保存的路径

5. 页面显示

5.1 首页

5.2 上传页面

5.3 结果

谢谢观看 ^-^！！！

posted @ 2019-07-30 21:35 Me*源阅读(213) 评论(0) 收藏举报

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