fileUp.jsp上傳文件的jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<%@taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
</head>
<body>
文件上傳
<hr>
<s:form action="upload1" enctype="multipart/form-data">
<s:textfield name="title" label="文件標題"/><br>
<s:file name="upload" label="選擇文件"/><br>
<s:submit value="上傳"/>
</s:form>
</body>
</html>
fileupsuccess.jsp上傳成功跳轉的jsp文件
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<%@taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
</head>
<body>
<h2>文件上傳成功!</h2>
<hr>
文件標題:<s:property value="title"/><br>
<s:property value="uploadFileName"/><br>
<img src="<s:property value="'save/'+uploadFileName"/>"/>
<br>
</body>
</html>
UploadAction.action文件
package login;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class UploadAction extends ActionSupport{
private String title;//標題
private File upload;//文件對象
private String uploadFileName;//文件名
private String savePath;//保存的路徑
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 getUploadFileName() {
return uploadFileName;
}
public void setUploadFileName(String uploadFileName) {
this.uploadFileName = uploadFileName;
}
public String getSavePath() {
return ServletActionContext.getServletContext().getRealPath(savePath);//獲取絕對路徑並修改路徑爲自定義路徑
}
public void setSavePath(String savePath) {
this.savePath = savePath;
}
public 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);
}
fis.close();
fos.close();
return SUCCESS;
}
}
很重要的struts.xml文件
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<constant name="struts.custom.i18n.resources" value="messages" /><span style="font-size:24px;">//</span>value是國際化資源配置文件的文件名
<constant name="struts.i18n.encoding" value="utf-8" />
<package name="I18N" extends="struts-default">
<action name="upload1" class="login.UploadAction">
<interceptor-ref name="fileUpload">
<param name="maximumSize">10000000</param>
<param name="allowedTypes">
image/gif,image/png,image/jpeg,image/jpg,image/pjpeg
</param>
</interceptor-ref>
<interceptor-ref name="defaultStack"/>
<param name="savePath">./save</param><span style="color:#FF6666;">//這個是項目WebRoot目錄下新建的文件夾save</span>
<result name="input">/fileUp.jsp</result>
<result name="success">/fileupsuccess.jsp</result>
</action>
</package>
</struts>
例如 messages_zh_CN.properties 表示中文配置文件 messages_en_US.properties 英文配置文件
最重要的關係資源配置文件有效與否的是資源文件的路徑問題 我今天調試了一下午查了各種資料都沒有找出問題
剛剛將資源文件放在項目目錄的src包下面就可以起作用了，切記，這是給我印象最深的一個了
我今天還遇到的一個問題就是<img src="<s:property value="'save/'+uploadFileName"/>"/>
value的值就是加載項目目錄中保存圖片的文件夾+文件名 save的路徑一定要寫對，否則即使上傳成功也不能顯示圖片