标签：
文件上传
界面
1 <%@ page contentType="text/html;charset=UTF-8" language="java" pageEncoding="UTF-8" %> 2 <% 3 String homePage = request.getContextPath(); 4 %> 5 <!DOCTYPE html> 6 <html> 7 <head> 8 <title>文件上传</title> 9 </head> 10 <body> 11 <form action="<%=homePage%>/updateAndDownload/upLoadDo.action" method="post" enctype="multipart/form-data"> 12 <table> 13 <caption>文件上传</caption> 14 <tr> 15 <td>文件标题</td> 16 <td> 17 <input type="text" name="title" /> 18 </td> 19 </tr> 20 <tr> 21 <td>选择文件</td> 22 <td> 23 <input type="file" name="upload" /> 24 </td> 25 </tr> 26 <tr> 27 <td colspan="2" align="right"> 28 <input type="submit" value="上传" /> 29 </td> 30 </tr> 31 </table> 32 </form> 33 </body> 34 </html>
处理上传的Action
1 package org.zln.updateAndDownload.action; 2 3 import com.opensymphony.xwork2.ActionSupport; 4 import org.apache.struts2.ServletActionContext; 5 6 import java.io.*; 7 import java.util.UUID; 8 9 /** 10 * Created by sherry on 000010/7/10 9:52. 11 */ 12 public class FileUpAndDownload extends ActionSupport { 13 14 private String title; 15 16 /*上传文件*/ 17 private File upload; 18 /*文件类型*/ 19 private String uploadContentType; 20 /*文件名*/ 21 private String uploadFileName; 22 23 /*保存路径*/ 24 private String savePath; 25 26 public String upLoadUI(){ 27 return SUCCESS; 28 } 29 30 public String upLoadDo() throws IOException { 31 /*写*/ 32 File outWrite = new File(getSavePath()); 33 if (!outWrite.exists()){ 34 outWrite.mkdir(); 35 } 36 FileOutputStream fileOutputStream = new FileOutputStream(getSavePath()+File.separatorChar+ UUID.randomUUID()+getUploadFileName()); 37 /*读*/ 38 FileInputStream fileInputStream = new FileInputStream(upload); 39 40 byte[] bytes = new byte[1024]; 41 int len = 0; 42 while ((len = fileInputStream.read(bytes)) > 0){ 43 fileOutputStream.write(bytes,0,len); 44 } 45 fileOutputStream.close(); 46 fileInputStream.close(); 47 return SUCCESS; 48 } 49 50 public String getTitle() { 51 return title; 52 } 53 54 public void setTitle(String title) { 55 this.title = title; 56 } 57 58 public File getUpload() { 59 return upload; 60 } 61 62 public void setUpload(File upload) { 63 this.upload = upload; 64 } 65 66 public String getUploadContentType() { 67 return uploadContentType; 68 } 69 70 public void setUploadContentType(String uploadContentType) { 71 this.uploadContentType = uploadContentType; 72 } 73 74 public String getUploadFileName() { 75 return uploadFileName; 76 } 77 78 public void setUploadFileName(String uploadFileName) { 79 this.uploadFileName = uploadFileName; 80 } 81 82 //返回文件保存路径 83 public String getSavePath() { 84 return ServletActionContext.getServletContext().getRealPath(savePath); 85 } 86 87 public void setSavePath(String savePath) { 88 this.savePath = savePath; 89 } 90 }
配置
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE struts PUBLIC 3 "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" 4 "http://struts.apache.org/dtds/struts-2.3.dtd"> 5 6 <struts> 7 8 <!--必须继承default才能使用其全局跳转页面--> 9 <package name="updateAndDownload" namespace="/updateAndDownload" extends="default"> 10 <!--文件上传--> 11 <action name="upLoadUI" class="org.zln.updateAndDownload.action.FileUpAndDownload" method="upLoadUI"> 12 <result>/WEB-INF/updateAndDownload/upLoadUI.jsp</result> 13 </action> 14 <action name="upLoadDo" class="org.zln.updateAndDownload.action.FileUpAndDownload" method="upLoadDo"> 15 <param name="savePath">/upload</param> 16 <result name="success">/WEB-INF/updateAndDownload/upLoadSucc.jsp</result> 17 <result name="input">/WEB-INF/updateAndDownload/upLoadUI.jsp</result> 18 </action> 19 </package> 20 21 </struts>
<constant name="struts.multipart.maxSize" value="1000000000"/>
如何上传多个文件？
1 <%@ page contentType="text/html;charset=UTF-8" language="java" pageEncoding="UTF-8" %> 2 <% 3 String homePage = request.getContextPath(); 4 %> 5 <!DOCTYPE html> 6 <html> 7 <head> 8 <title>文件上传</title> 9 </head> 10 <body> 11 <form action="<%=homePage%>/updateAndDownload/upLoadDo.action" method="post" enctype="multipart/form-data"> 12 <table> 13 <caption>文件上传</caption> 14 <tr> 15 <td>文件标题</td> 16 <td> 17 <input type="text" name="title" /> 18 </td> 19 </tr> 20 <tr> 21 <td>选择文件</td> 22 <td> 23 <input type="file" name="upload" /> 24 </td> 25 </tr> 26 <tr> 27 <td>选择文件</td> 28 <td> 29 <input type="file" name="upload" /> 30 </td> 31 </tr> 32 <tr> 33 <td>选择文件</td> 34 <td> 35 <input type="file" name="upload" /> 36 </td> 37 </tr> 38 <tr> 39 <td colspan="2" align="right"> 40 <input type="submit" value="上传" /> 41 </td> 42 </tr> 43 </table> 44 </form> 45 <hr/> 46 <a href="<%=homePage%>/updateAndDownload/showUploadFiles.action">显示已上传文件</a><br/> 47 </body> 48 </html>
1 package org.zln.updateAndDownload.action; 2 3 import com.opensymphony.xwork2.ActionContext; 4 import com.opensymphony.xwork2.ActionSupport; 5 import org.apache.struts2.ServletActionContext; 6 7 import java.io.*; 8 import java.util.ArrayList; 9 import java.util.List; 10 import java.util.UUID; 11 12 /** 13 * Created by sherry on 000010/7/10 9:52. 14 */ 15 public class FileUpAndDownload extends ActionSupport { 16 17 private String title; 18 19 /*上传文件*/ 20 private File[] upload; 21 /*文件类型*/ 22 private String[] uploadContentType; 23 /*文件名*/ 24 private String[] uploadFileName; 25 26 /*保存路径*/ 27 private String savePath; 28 29 //文件上传界面 30 public String upLoadUI(){ 31 return SUCCESS; 32 } 33 34 //文件上传动作 35 public String upLoadDo() throws IOException { 36 /*写*/ 37 File outWrite = new File(getSavePath()); 38 if (!outWrite.exists()){ 39 outWrite.mkdir(); 40 } 41 BufferedInputStream bufferedInputStream = null; 42 BufferedOutputStream bufferedOutputStream = null; 43 for (int i = 0;i < upload.length;i++){ 44 bufferedInputStream = new BufferedInputStream(new FileInputStream(upload[i])); 45 bufferedOutputStream = new BufferedOutputStream(new FileOutputStream(getSavePath()+File.separatorChar+UUID.randomUUID()+uploadFileName[i])); 46 byte[] bytes = new byte[4096]; 47 int len = 0; 48 while ((len = bufferedInputStream.read(bytes))>0){ 49 bufferedOutputStream.write(bytes,0,len); 50 } 51 bufferedOutputStream.close(); 52 bufferedInputStream.close(); 53 } 54 return SUCCESS; 55 } 56 57 //显示上传的文件 58 public String showUploadFiles(){ 59 60 File rootFile = new File(getSavePath()); 61 File[] files = rootFile.listFiles(); 62 List<String> listFile = new ArrayList<>(); 63 for (int i = 0; i < files.length; i++) { 64 listFile.add(files[i].getAbsolutePath()); 65 } 66 ActionContext.getContext().put("listFile",listFile); 67 return SUCCESS; 68 } 69 70 //删除所有上传文件 71 public String deleteAllUploadFiles(){ 72 File rootFile = new File(getSavePath()); 73 File[] files = rootFile.listFiles(); 74 for (File file:files){ 75 file.delete(); 76 } 77 return SUCCESS; 78 } 79 80 81 82 public String getTitle() { 83 return title; 84 } 85 86 public void setTitle(String title) { 87 this.title = title; 88 } 89 90 public File[] getUpload() { 91 return upload; 92 } 93 94 public void setUpload(File[] upload) { 95 this.upload = upload; 96 } 97 98 public String[] getUploadContentType() { 99 return uploadContentType; 100 } 101 102 public void setUploadContentType(String[] uploadContentType) { 103 this.uploadContentType = uploadContentType; 104 } 105 106 public String[] getUploadFileName() { 107 return uploadFileName; 108 } 109 110 public void setUploadFileName(String[] uploadFileName) { 111 this.uploadFileName = uploadFileName; 112 } 113 114 //返回文件保存路径 115 public String getSavePath() { 116 return ServletActionContext.getServletContext().getRealPath(savePath); 117 } 118 119 public void setSavePath(String savePath) { 120 this.savePath = savePath; 121 } 122 }
使用拦截器控制允许上传的文件类型
1 <action name="upLoadDo" class="org.zln.updateAndDownload.action.FileUpAndDownload" method="upLoadDo"> 2 <interceptor-ref name="fileUpload"> 3 <param name="allowedTypes"> 4 text/plain,application/vnd.openxmlformats-officedocument.spreadsheetml.sheet,application/pdf 5 </param> 6 <param name="maximumSize">4000</param> 7 </interceptor-ref> 8 <interceptor-ref name="defaultStack"/> 9 <param name="savePath">/upload</param> 10 <result name="success">/WEB-INF/updateAndDownload/upLoadSucc.jsp</result> 11 <result name="input">/WEB-INF/updateAndDownload/upLoadUI.jsp</result> 12 </action>
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原文地址：http://www.cnblogs.com/sherrykid/p/4638781.html
