Struts上传文件fileupload

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fileUp.jsp上传文件的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>    文件上传    <hr>    <s:form action="upload1" enctype="multipart/form-data">    <s:textfield name="title" label="文件标题"/><br>    <s:file name="upload" label="选择文件"/><br>    <s:submit value="上传"/>    </s:form>  </body></html>

fileupsuccess.jsp上传成功跳转的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>文件上传成功!</h2>    <hr>    文件标题:<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;//标题private File upload;//文件对象private String uploadFileName;//文件名private String savePath;//保存的路径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);//获取绝对路径并修改路径为自定义路径}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是国际化资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;">//这个是项目WebRoot目录下新建的文件夹save</span>        <result name="input">/fileUp.jsp</result><result name="success">/fileupsuccess.jsp</result></action></package></struts>

总结：国际化配置资源文件名格式文件名_语言种类_语言编码.properties

例如 messages_zh_CN.properties 表示中文配置文件 messages_en_US.properties 英文配置文件

最重要的关系资源配置文件有效与否的是资源文件的路径问题我今天调试了一下午查了各种资料都没有找出问题

刚刚将资源文件放在项目目录的src包下面就可以起作用了，切记，这是给我印象最深的一个了

我今天还遇到的一个问题就是<img src="<s:property value="'save/'+uploadFileName"/>"/>

value的值就是加载项目目录中保存图片的文件夹+文件名 save的路径一定要写对，否则即使上传成功也不能显示图片

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