文件上传：
三种上传方案
1、上传到tomcat服务器 上传图片的存放位置与tomcat服务器的耦合度太高
2、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
3、在数据库表中建立二进制字段，将图片存储到数据库
jsp界面
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@taglib prefix="z" uri="/zl"%>
<!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>
<h2>小说目录</h2>
<br>
<form action="${pageContext.request.contextPath}/sy/clz_list.action"
method="post">
书名：<input type="text" name="bname"> <input type="submit"
value="确定">
</form>
<a href="${pageContext.request.contextPath}/sy/clz_preSave.action">增加</a>
<table border="1" width="100%">
<tr>
<td>编号</td>
<td>班级名称</td>
<td>老师</td>
<td>班级图片</td>
</tr>
<c:forEach items="${clzList }" var="b">
<tr>
<td>${b.cid }</td>
<td>${b.cname }</td>
<td>${b.cteacher }</td>
<td>
<img style="height: 80px; 50px" src="${pageContext.request.contextPath}${b.pic}">
</td>
<td><a
href="${pageContext.request.contextPath}/sy/clz_preSave.action?cid=${b.cid}">修改</a>
<a
href="${pageContext.request.contextPath}/sy/clz_del.action?cid=${b.cid}">删除</a>
<a
href="${pageContext.request.contextPath}/sy/clz_preUpload.action?cid=${b.cid}">图片上传</a>
</td>
</tr>
</c:forEach>
</table>
<z:page pageBean="${pageBean }"></z:page>
</body>
</html>
图片上传界面
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>图片上传</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/sy/clz_upload.action" method="post" enctype="multipart/form-data">
<input type="hidden" value="${result.cid }" name="cid"><br>
<input type="hidden" value="${result.cname }" name="cname"><br>
<input type="hidden" value="${result.cteacher }" name="cteacher"><br>
<input type="file" name="file">
<input type="submit" value="ok">
</form>
</body>
</html>
ClazzAction控制器
package com.zl.web;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.sql.SQLException;
import java.util.List;
import org.apache.commons.io.FileUtils;
import com.zl.dao.ClazzDao;
import com.zl.entity.Clazz;
import com.zl.util.BaseAction;
import com.zl.util.PageBean;
import com.opensymphony.xwork2.ModelDriven;
public class ClazzAction extends BaseAction implements ModelDriven<Clazz>{
private Clazz clz=new Clazz();
private ClazzDao clzDao=new ClazzDao();
//这里的属性名要和name对应
private File file;
//xxxFileName
private String fileFileName;
//xxxContentType
private String fileContentType;
/**
* 跳转上传图片的界面
* @return
*/
public String preUpload() {
try {
this.result= this.clzDao.list(clz, null).get(0);
} catch (InstantiationException | IllegalAccessException | SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "preUpload";
}
public String upload() {
String realDir="F:/226tupian";
String severDir="/upload";
try {
FileUtils.copyFile(file, new File(realDir+"/"+fileFileName));
//copyFile(file,new File(realDir+"/"+fileFileName));
clz.setPic(severDir+"/"+fileFileName);
try {
this.clzDao.edit(clz);
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "toList";
}
/**
* 利用缓冲流技术进行拷贝
* @param source
* @param target
* @throws IOException
*/
public void copyFile(File source,File target) throws IOException {
BufferedInputStream in=new BufferedInputStream(new FileInputStream(file));
BufferedOutputStream out=new BufferedOutputStream(new FileOutputStream(target));
byte[] bbuf=new byte[1024];
int len=0;
while((len=in.read(bbuf))!=-1) {
out.write(bbuf,0,len);
}
in.close();
out.close();
}
public String list(){
PageBean pageBean =new PageBean();
pageBean.setRequest(request);
try {
List<Clazz> list = this.clzDao.list(clz, pageBean);
request.setAttribute("clzList",list);
request.setAttribute("pageBean",pageBean);
} catch (InstantiationException | IllegalAccessException | SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "list";
}
/**
* 跳转编辑页面 （新增修改页面）
* @return
*/
public String preSave() {
if(clz.getCid()!=0) {
try {
this.result= this.clzDao.list(clz, null).get(0);
} catch (InstantiationException | IllegalAccessException | SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return "preSave";
}
public String add() {
try {
this.code= this.clzDao.add(clz);
} catch (NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException
| SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "toList";
}
public String edit() {
try {
this.clzDao.edit(clz);
} catch (NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException
| SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "toList";
}
public String del() {
try {
this.clzDao.del(clz);
} catch (NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException
| SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "toList";
}
@Override
public Clazz getModel() {
// TODO Auto-generated method stub
return clz;
}
public File getFile() {
return file;
}
public void setFile(File file) {
this.file = file;
}
public String getFileFileName() {
return fileFileName;
}
public void setFileFileName(String fileFileName) {
this.fileFileName = fileFileName;
}
public String getFileContentType() {
return fileContentType;
}
public void setFileContentType(String fileContentType) {
this.fileContentType = fileContentType;
}
}
struts-sy.xml配置
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
"http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
<package name="sy" extends="base" >
<action name="/hello_*" class="com.zl.HelloAction" method="{1}">
<result name="success">/success.jsp</result>
</action>
<action name="/clz_*" class="com.zl.web.ClazzAction" method="{1}">
<result name="list">/clzList.jsp</result>
<result name="preSave">/clzEdit.jsp</result>
<result name="preUpload">/clzUpload.jsp</result>
<result name="toList" type="redirectAction">/clz_list</result>
</action>
</package>
</struts>
找到server.xml 在最后面加入
<Context path="/struts（项目名）/upload" docBase="F:/226tupian（用来存储图片的文件夹的路径）"/>
