struts2 实现多文件限制上传
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struts2 实现多文件限制上传
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struts2的文件上傳特別簡單，把我做的小例子給大家看一下
upload.jsp
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 | < %@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> < %@ taglib prefix="s" uri="/struts-tags" %> < %String path = request.getContextPath();pageContext.setAttribute("context",path); %>< !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html><head><title>My JSP 'index.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"></meta><meta http-equiv="cache-control" content="no-cache"></meta><meta http-equiv="expires" content="0"></meta><meta http-equiv="keywords" content="keyword1,keyword2,keyword3"></meta><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">--><script type="text/javascript">function more() {var td = document.getElementById("more");var br = document.createElement("br");var input = document.createElement("input");input.type="file";input.name="uf.upload";var button = document.createElement("input");button.type="button";button.value="remove";td.appendChild(br);td.appendChild(input);td.appendChild(button);button.onclick = function() {td.removeChild(br);td.removeChild(input);td.removeChild(button);}}</script></meta></head><body><h1>struts2上傳不定數的文件，限制文件上傳類型（struts.xml配置攔截器）</h1><hr /><s :fielderror></s><table align="center" border="1" width="50%"><s :form action="upload" enctype="multipart/form-data" method="post" theme="simple"><tr> <td>用戶名：</td><td><s :textfield name="uf.username"></s></td></tr><tr> <td>上傳：</td><td id="more"><s :file name="uf.upload"></s><font color="red">*只能上傳.jpg文件,小于400kb</font><input type="button" value="添加.." onclick="more()"/></td></tr><tr> <td align="center"><s :submit value="提交"></s></td><td><s :reset value="重置"/></td></tr></s></table></body> </html> |
我把jsp上傳的內容封裝成了一個類UploadFile.java,下面代碼顯示有點問題,泛型里的好像都出錯了應該是 ,,還有最下邊的一行根本就沒有，沒時間找顯示錯誤的問題，說明一下
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | package pojo;import java.io.File; import java.util.List;public class UploadFile {private String username;private List<file> upload;private List<string> uploadFileName;private List</string><string> uploadContentType;public List<file> getUpload() {return upload;}public void setUpload(List</file><file> upload) {this.upload = upload;}public List<string> getUploadContentType() {return uploadContentType;}public void setUploadContentType(List</string><string> uploadContentType) {this.uploadContentType = uploadContentType;}public List</string><string> getUploadFileName() {return uploadFileName;}public void setUploadFileName(List</string><string> uploadFileName) {this.uploadFileName = uploadFileName;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}}</string></file></string></file> |
接著是struts.xml的配置：
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | < ?xml version="1.0" encoding="UTF-8" ?> < !DOCTYPE struts PUBLIC"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN""http://struts.apache.org/dtds/struts-2.0.dtd"><struts><!-- 更改字符集編碼 在org.apache.struts2.default.properties 定義--> <constant name="struts.i18n.encoding" value="UTF-8"></constant> <constant name="struts.multipart.maxSize" value="40960000"></constant> <!-- 顯示錯誤信息時，src下有message.properties,要在這里配置，才顯示自己寫的錯誤信息--><constant name="struts.custom.i18n.resources" value="message"></constant><action name="upload" class="action.UploadAction"><result name="success">/uploads/result.jsp</result><result name="input">/uploads/upload.jsp</result><interceptor -ref name="fileUpload"><!-- 在org.apache.struts2.interceptor.FileUploadInterceptor找限制大小和類型的參數限制每個每個上傳文件的大小，允許上傳的類型，類型在tomcat-->conf-->web.xml中尋找 --><param name="maximumSize">40960000</param><param name="allowedTypes">image/jpeg,image/jpeg</param></interceptor><!-- 默認攔截器defaultStack要顯示的調用，當你調用其他的攔截器后，默認攔截器不會再自動調用 --><interceptor -ref name="defaultStack"></interceptor></action></struts> |
接著看UploadAction.java
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | package action;import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.Iterator; import java.util.List;import org.apache.struts2.ServletActionContext;import sjzpc.pojo.UploadFile;import com.opensymphony.xwork2.ActionSupport;public class UploadAction extends ActionSupport {private UploadFile uf;public UploadFile getUf() {return uf;}public void setUf(UploadFile uf) {this.uf = uf;}@Overridepublic String execute() throws Exception {for(int i = 0; i < uf.getUpload().size(); i++) {//多文件上傳InputStream is = new FileInputStream(uf.getUpload().get(i));// String root = ServletActionContext.getRequest.getRealPath("/uploads"); 這個request.getRealPath()方法已過時，不建議使用String root = ServletActionContext.getServletContext().getRealPath("/uploads");OutputStream os = new FileOutputStream(new File(root,uf.getUploadFileName().get(i)));int len = 0;byte[] buffer = new byte[1024];//緩沖，提高效率while((len = is.read(buffer)) > 0) {os.write(buffer, 0, len);}// 輸入輸出流記著一定要關閉os.close();is.close();}return "success";} } |
struts2多文件限制上傳源碼下載
轉載于:https://www.cnblogs.com/JemBai/archive/2009/12/11/1621857.html
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