標籤：des style blog http color io os ar 使用
在WEB-INF下建立一個content目錄，建立一個upload.jsp
1 <%@ page contentType="text/html; charset=UTF-8" language="java" errorPage="" %> 2 <%@taglib prefix="s" uri="/struts-tags"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 4 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 5 <html xmlns="http://www.w3.org/1999/xhtml"> 6 <head> 7 <title>簡單的檔案上傳</title> 8 </head> 9 <body>10 <s:form action="uploadPro" method="post"11 enctype="multipart/form-data">12 <s:textfield name="title" label="檔案標題"/><br />13 <s:file name="upload" label="選擇檔案"/><br />14 <s:submit value="上傳"/>15 </s:form>16 </body>17 </html>
然後UploadAction.java如下
package action;import com.opensymphony.xwork2.Action;import com.opensymphony.xwork2.ActionSupport;import org.apache.struts2.ServletActionContext;import java.io.File;import java.io.*;public class UploadAction extends ActionSupport{private String title;private File upload;private String uploadContentType;private String uploadFileName;private String savePath;public String getTitle() {return title;}public void setTitle(String title) {this.title = title;}public File getUpload() {return upload;}public void setUpload(File upload) {this.upload = upload;}public String getUploadContentType() {return uploadContentType;}public void setUploadContentType(String uploadContentType) {this.uploadContentType = uploadContentType;}public String getUploadFileName() {return uploadFileName;}public void setUploadFileName(String uploadFileName) {this.uploadFileName = uploadFileName;}public String getSavePath() {return ServletActionContext.getServletContext().getRealPath(savePath);}public void setSavePath(String savePath) {this.savePath = savePath;}@Overridepublic String execute() throws Exception{FileOutputStream fos = new FileOutputStream(getSavePath()+"//"+getUploadFileName());FileInputStream fis = new FileInputStream(getUpload());byte[] buffer = new byte[1024];int len = 0;while((len = fis.read(buffer)) > 0){fos.write(buffer, 0 , len);}fis.close();fos.close();return SUCCESS;}}
在struts2中，如果表單中包含一個name屬性為xxx的檔案域，則對應action需要使用三個屬性來封裝該檔案域的資訊。
1.類型為File的xxx屬性封裝了該檔案域對應的檔案內容。
2.類型為String的xxxFileName屬性封裝了該檔案域對應的檔案的檔案名稱。
3.類型為String的xxxContentType屬性封裝了該檔案域對應的檔案的檔案類型。
上面例子struts2直接將檔案域包含的上傳檔案名稱和檔案類型的資訊封裝到uploadFileName和uploadContentType屬性中。
下面是sruts.xml配置
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts PUBLIC"-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN""http://struts.apache.org/dtds/struts-2.1.7.dtd"><struts><constant name="struts.custom.i18n.resources" value="mess"/><!-- 設定該應用使用的解碼集 --><constant name="struts.i18n.encoding" value="GBK"/><package name="lee" extends="struts-default"><!-- 配置處理檔案上傳的Action --><action name="uploadPro" class="action.UploadAction"><!-- 動態設定Action的屬性值 --><param name="savePath">/upload</param><!-- 配置Struts 2預設的視圖頁面 --><result>/WEB-INF/content/succ.jsp</result></action><action name="*"><result>/WEB-INF/content/{1}.jsp</result></action></package></struts>
然後是web.xml
<?xml version="1.0" encoding="UTF-8"?><web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"> <filter><filter-name>struts2</filter-name><filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class></filter><!-- 讓Struts 2的核心Filter攔截所有請求 --><filter-mapping><filter-name>struts2</filter-name><url-pattern>/*</url-pattern></filter-mapping></web-app>
succ.jsp:
<%@ page contentType="text/html; charset=UTF-8" language="java" errorPage="" %><%@taglib prefix="s" uri="/struts-tags"%><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>上傳成功</title></head><body>上傳成功!<br/>檔案標題:<s:property value=" + title"/><br/>檔案為：<img src="<s:property value="‘upload/‘ + uploadFileName"/>"/><br/></body></html>
struts2上傳圖片
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