第29講 .struts2檔案上傳
阿新 • • 發佈：2018-11-11
1複製HeadFirstStruts2chapter07 改名：HeadFirstStruts2chapter08,刪除所有的包和類。新建fileUpload.jsp，form表單 enctype="multipart/form-data"實現二進位制傳輸，
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib prefix="s" uri="/struts-tags"
<!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>
<form action="upLoad"
檔案：<input type="file" name="cruise"/>
<input type="submit" value="提交檔案"/>
</form>
</body>
</html>
2success.jsp，
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"
<%@taglib prefix="s" uri="/struts-tags" %>
<!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>
檔案上傳成功！！！
</table>
</body>
</html>
3新建FileUploadAction，繼承ActionSupport，檔案：cruise與jsp中的name屬性一致，檔名cruiseFileName,檔案型別cruiseContentType;這幾個屬性的寫法是固定的
package com.cruise.action;
import java.io.File;
import org.apache.commons.io.FileUtils;
import com.opensymphony.xwork2.ActionSupport;
public class FileUploadAction extends ActionSupport{
private File cruise;
private String cruiseFileName;
private String cruiseContentType;
public File getCruise() {
return cruise;
}
public void setCruise(File cruise) {
this.cruise = cruise;
}
public String getCruiseFileName() {
return cruiseFileName;
}
public void setCruiseFileName(String cruiseFileName) {
this.cruiseFileName = cruiseFileName;
}
public String getCruiseContentType() {
return cruiseContentType;
}
public void setCruiseContentType(String cruiseContentType) {
this.cruiseContentType = cruiseContentType;
}
@Override
public String execute() throws Exception {
String filePath="C:/Users/pengc/Desktop/"+cruiseFileName;
File saveFile = new File(filePath);
FileUtils.copyFile(cruise, saveFile);
return SUCCESS;
}
}
4配置struts2.xml檔案，
<?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>
<package name="manager" extends="struts-default">
<action name="upLoad" class="com.cruise.action.FileUploadAction">
<result name="success">/success.jsp</result>
</action>
</package>
</struts>
5測試
http://localhost:8080/HeadFirstStruts2chapter08/fileUpload.jsp
6配置struts2.xml檔案，引用攔截器fileUpload，設定上傳檔案的型別和大小，如果上傳的檔案被拒絕，返回“input”字串，fileUpload是固定寫法，
<?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>
<package name="manager" extends="struts-default">
<action name="upLoad" class="com.cruise.action.FileUploadAction">
<result name="success">/success.jsp</result>
<result name="input">/fileUpload.jsp</result>
<interceptor-ref name="fileUpload">
<param name="allowedTypes">image/bmp,image/x-png,image/gif,image/jpg,image/jpeg</param>
<param name="maximumSize">81101</param>
</interceptor-ref>
<interceptor-ref name="defaultStack"></interceptor-ref>
</action>
</package>
</struts>
7修改fileUpload.jsp檔案，新增標籤：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib prefix="s" uri="/struts-tags" %>
<!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>
<s:fielderror></s:fielderror>
<form action="upLoad" method="post" enctype="multipart/form-data">
檔案：<input type="file" name="cruise"/>
<input type="submit" value="提交檔案"/>
</form>
</body>
</html>
8測試
http://localhost:8080/HeadFirstStruts2chapter08/fileUpload.jsp
9修改struts.xml檔案，修改檔案上傳的大小限制,struts預設是 不超過2M，
<?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>
<constant name="struts.multipart.maxSize" value="10000000"></constant>
<package name="manager" extends="struts-default">
<action name="upLoad" class="com.cruise.action.FileUploadAction">
<result name="success">/success.jsp</result>
<result name="input">/fileUpload.jsp</result>
</action>
</package>
</struts>
10測試
http://localhost:8080/HeadFirstStruts2chapter08/fileUpload.jsp