webwork中文件上传实现

﹏ヽ暗。殇╰゛Y 2021-09-10 03:52 311阅读 0赞

\[简单介绍\]

webwork 文件上传采用拦截器的方式，叫fileUpload

可供选择的上传组件有pell(2.1.7默认)jakata(2.2及以后默认)，cos

\[例子\]

\[注意事项\]

1、cos和pell文件上传解析器不在被积极维护,会被很快移除.我们强烈建议你使用Jakarta的文件上传解析器,也就是缺省的解析器

2、处理multipartRequest pell支持中文属性和中文文件名，如果遇到中文乱码问题，建议使用pell

step1:  
页面定义如下  
    <form action="upload.do" enctype="multipart/form-data" method="post">  
            <input type="file" name="doc"/>  
             ......................... 省略  
   </form>  
  
step2  
    action 如下  
    public class UploadAction extends ActionSupport \{  
          .....................................  
          private File doc;//doc与页面取一样的名字  
  
          public void setDoc(File doc) \{  
                 this.doc = doc;  
         \}  
  
         //当然还可以使用以下的咚咚  
  /\*  
     \* public void setDocContentType(String docContentType) \{  
     \* this.docContentType = docContentType; \}  
     \*  
     \*//\*\*  
         \*  
         \* @author weip  
         \* @time 0:23:24 2006-5-11  
         \* @param docFileName  
         \*/  
    /\*  
     \* public void setDocFileName(String docFileName) \{ this.docFileName =  
     \* docFileName; \}  
     \*/  
  
    /\*\*  
     \*  
     \*/  
    /\*  
     \* private String docContentType;  
     \*  
     \*//\*\*  
         \*  
         \*/  
    /\*  
     \* private String docFileName;  
     \*/  
  
.............................................................  
  
   \}  
  
当程序进入到action当中时,你可以开始处理上面代码中的doc,此时文件已上传到服务器中的一个临时目录(同时被注入到action中就是你看到的doc),此临时目录由webwork.properties指定,你必须将此文件拷贝到你需要的目录,否则action执行完毕,此文件会被删除,准确说是拦截器的后处理删除了临时文件,这一段结论的前提是你使用拦截器处理上传  
  
step3  
处理配置文件,配置拦截器  
  
<action name="upload" class="com.mofile.baby.web.action.signup.UploadAction">  
            
            <result name="success" type="freemarker">/page/signup/uploadfile.htm</result>  
            <interceptor-ref name="fileUpload"/>  
            <interceptor-ref name="defaultWebStack"/>  
           
  </action>  
  
step4  
对于webwork.properties的一些处理  
webwork in action上推荐使用webwork.multipart.parser=jakarta而不是默认的 pell,如果使用前者,不要忘了在你的lib中加入commons-fileupload.jar  
  
  
需要注意的问题:  
你在使用fileUpload传拦截器的时候应该避免使用execAndWait拦截器,否则很有可能会出现空指针,因为execAndWait拦截器会在另一个线程处理action,而原来的线程会删掉临时文件,所以当你在action中处理文件的时候很有可能文件已被删掉,虽然这并非一定会出现,但毕竟不安全  
 转自：[http://blog.csdn.net/pwlazy/archive/2006/05/11/724735.aspx][http_blog.csdn.net_pwlazy_archive_2006_05_11_724735.aspx]

方法二、（有多文档上传那块）

用webwork框架做upload的java读取代码  
    我的语言表达能力不是很好，说也许说不明白，可能给看的说得糊涂了，同样  
这个对做上传得新手很有用，不啰嗦了，先写代码吧：一共4个地方要弄，  
前台，后台，xwork和webwork.properties  
前台：  
upload.jsp:  
=================================================================  
<%--  
  Created by IntelliJ IDEA.  
  User: lvjiachun  
  Date: 2006-5-3  
  Time: 9:32:35  
  To change this template use File | Settings | File Templates.  
\--%>  
<%@ page contentType="text/html;charset=utf-8" language="java" %>  
<%@ taglib prefix="ww" uri="/webwork" %>  
<html>  
<head><title>upload</title></head>  
<body><p align="center">  
    <ww:form action="upload.action" name="upload" method="post" enctype="multipart/form-data">  
        <ww:file name="file1" value="浏览" label="ReadFile"/>  
        <ww:file name="file2" value="浏览" label="ReadFile"/>  
        <ww:file name="file3" value="浏览" label="ReadFile"/>  
        <ww:file name="file4" value="浏览" label="ReadFile"/>  
        <ww:textfield name="model.fileURL" label="Road"/>  //指定上传得文件保存到哪里  
        <ww:submit/>  
    </ww:form></p>  
</body>  
</html>  
=======================================================================  
upload-success.jsp  
=======================================================================  
<%--  
  Created by IntelliJ IDEA.  
  User: lvjiachun  
  Date: 2006-5-3  
  Time: 9:38:04  
  To change this template use File | Settings | File Templates.  
\--%>  
<%@ page contentType="text/html;charset=utf-8" language="java" %>  
<%@ taglib prefix="ww" uri="/webwork" %>  
<html>  
<head><title>upload-success</title></head>

<body>  
<p align="center">  
    你已经上传成功，  
    <a href="upload.jsp">请返回</a>  
</p>  
</body>  
</html>  
========================================================================  
后台：一共需要三个4个java文件  
1.  <FileMes>  
package upload.until;

/\*\*  
 \* Created by IntelliJ IDEA.  
 \* User: lvjiachun  
 \* Date: 2006-5-3  
 \* Time: 7:51:11  
 \* To change this template use File | Settings | File Templates.  
 \*/  
public class FileMes \{  
    private String fileName;

public String getFileName() \{  
        return fileName;  
    \}

public void setFileName(String fileName) \{  
        this.fileName = fileName;  
    \}

public String getFilePath() \{  
        return filePath;  
    \}

public void setFilePath(String filePath) \{  
        this.filePath = filePath;  
    \}

private String filePath;  
\}  
2.<FileSelect >  
package upload.until;

/\*\*  
 \* Created by IntelliJ IDEA.  
 \* User: lvjiachun  
 \* Date: 2006-5-3  
 \* Time: 7:51:23  
 \* To change this template use File | Settings | File Templates.  
 \*/  
public class FileSelect \{  
    private String fileName;  
    private String fileURL;  
    private String type;

public String getFileName() \{  
        return fileName;  
    \}

public void setFileName(String fileName) \{  
        this.fileName = fileName;  
    \}

public String getFileURL() \{  
        return fileURL;  
    \}

public void setFileURL(String fileURL) \{  
        this.fileURL = fileURL;  
    \}

public String getType() \{  
        return type;  
    \}

public void setType(String type) \{  
        this.type = type;  
    \}  
\}  
3.<UploadUntil >  
package upload.until;

import com.opensymphony.webwork.dispatcher.multipart.MultiPartRequestWrapper;  
import com.opensymphony.webwork.dispatcher.multipart.MultiPartRequest;  
import com.opensymphony.webwork.ServletActionContext;

import java.util.List;  
import java.util.ArrayList;  
import java.util.Enumeration;  
import java.util.Calendar;  
import java.io.\*;

/\*\*  
 \* Created by IntelliJ IDEA.  
 \* User: lvjiachun  
 \* Date: 2006-5-3  
 \* Time: 7:51:00  
 \* To change this template use File | Settings | File Templates.  
 \*/  
public class UploadUntil \{  
    public static List<FileMes> Upload(String smallPath) throws IOException \{  
        List<FileMes> fileMesList = new ArrayList<FileMes>();  
        String path = smallPath;  
        System.out.println("PATH 2:" + path);  
        MultiPartRequestWrapper multiWrapper = (MultiPartRequestWrapper) ServletActionContext.getRequest();  
        if (multiWrapper == null) return null;  
        Enumeration e = multiWrapper.getFileNames();  
        int i = 0;  
//===============================================================//  
        //这个是单文件上传的代码；！！如果想做单文件上传，把注释掉的代码去掉就可以了  
//        while (e.hasMoreElements()) \{  
//            String inputValue = (String) e.nextElement();  
//            String contentType = multiWrapper.getContentType(inputValue);  
//            String flie1 = multiWrapper.getFilesystemName(inputValue);  
//            String fileName = flie1;  
//            System.out.println("FileName underfinded:" + fileName);  
//            String savePath = path + fileName;  
//            File file = multiWrapper.getFile(inputValue);  
//            if (file != null) \{  
//                InputStream inStream = new FileInputStream(file.getPath());  
//                FileMes fm = new FileMes();  
//                fm.setFileName(flie1);  
//                System.out.println("FileName:" + fm.getFileName());  
//                System.out.println("SmallPath in UploadUntil.java" + smallPath);  
//                fm.setFilePath(smallPath + fileName);  
//                System.out.println("FilePath:" + fm.getFilePath());  
//                fileMesList.add(fm);  
//                System.out.println("SavePath:" + savePath);  
//                FileOutputStream fs = new FileOutputStream(savePath);  
//                byte\[\]buffer = new byte\[1444\];  
//                int length;  
//                int bytesum = 0;  
//                int byteread = 0;  
//                while ((byteread = inStream.read(buffer)) != -1) \{  
//                    bytesum += byteread;  
//                    fs.write(buffer, 0, byteread);  
//                \}  
//============================================================//  
// 下面这个是多文件上传-------------------  
        while (e.hasMoreElements()) \{  
            String inputValue = (String) e.nextElement();  
            String contentType = multiWrapper.getContentType(inputValue);  
            String flie1 = multiWrapper.getFilesystemName(inputValue);  
            String fileName = Calendar.getInstance().getTime().getTime() + "-" + i + flie1;  
            String savePath = path + fileName;  
            File file = multiWrapper.getFile(inputValue);  
            if (file != null) \{  
                InputStream inStream = new FileInputStream(file.getPath()); //读入原文件  
                FileMes fm = new FileMes();  
                fm.setFileName(flie1);  
                fm.setFilePath(smallPath + fileName);  
                fileMesList.add(fm);  
                FileOutputStream fs = new FileOutputStream(savePath);  
                byte\[\] buffer = new byte\[1444\];  
                int length;  
                int bytesum = 0;  
                int byteread = 0;  
                while ((byteread = inStream.read(buffer)) != -1) \{  
                    bytesum += byteread; //字节数 文件大小  
                    fs.write(buffer, 0, byteread);  
                \}  
//==============================================================//  
                inStream.close();   //关闭输入流  
                i++;  
                if (file.exists()) \{  
                    file.delete();  
                \}   //如果上传的文件存在则将其删除；  
            \}

\}  
        return fileMesList;  
    \}  
\}  
4.也就是最后一个，action<UploadfilesAction>  
package upload.fileupload;

import com.opensymphony.xwork.ActionSupport;  
import com.opensymphony.xwork.Action;  
import com.opensymphony.xwork.ModelDriven;  
import upload.until.FileSelect;

/\*\*  
 \* Created by IntelliJ IDEA.  
 \* User:lvjiachun  
 \* Date: 2006-5-3  
 \* Time: 7:52:34  
 \* To change this template use File | Settings | File Templates.  
 \*/  
public class UploadfilesAction extends ActionSupport implements Action, ModelDriven \{  
    FileSelect fileMes = new FileSelect();

public String upload() throws Exception \{  
        String smallPath = fileMes.getFileURL();  
        System.out.println(smallPath+"xiaosao");  
        java.io.File myFilePath = new java.io.File(smallPath);  
        if (smallPath != null) \{  
            if (!myFilePath.exists()) \{  
                myFilePath.mkdir();  
                System.out.println("\*\*\*\*\*\*\*MaKe DIR!\*\*\*\*\*\*\*\*\*");  
            \}  
        \}  
        upload.until.UploadUntil.Upload(smallPath);  
        return SUCCESS;

\}  
    public Object getModel() \{  
        return fileMes;  //To change body of implemented methods use File | Settings | File Templates.  
    \}  
\}  
\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*  
xwork中  
<?xml version="1.0" encoding="utf-8"?>  
<!DOCTYPE xwork PUBLIC "-//OpenSymphony Group//XWork 1.1.1//EN" "[http://www.opensymphony.com/xwork/xwork-1.1.1.dtd][http_www.opensymphony.com_xwork_xwork-1.1.1.dtd]">  
<xwork>  
    <include file="webwork-default.xml"/>  
    <package name="upload" extends="webwork-default">  
        <interceptors>  
            <interceptor name="upload" class="com.opensymphony.webwork.interceptor.FileUploadInterceptor"/>  
            <interceptor-stack name="uploadStack">  
                <interceptor-ref name="upload"/>  
                <interceptor-ref name="defaultStack"/>  
            </interceptor-stack>  
        </interceptors>  
        <default-interceptor-ref name="WSStack"/>  
      
        <action name="upload" class="upload.fileupload.UploadfilesAction" method="upload">  
            <result name="success">  
                <param name="location">/upload/upload-success.jsp</param>  
            </result>  
            <interceptor-ref name="uploadStack"/>  
            <interceptor-ref name="model-driven"/>  
        </action>  
    </package>  
</xwork>  
webwork.properties  
在webwork.properties中要加上这段代码  
webwork.multipart.parser=com.opensymphony.webwork.dispatcher.multipart.PellMultiPartRequest  
webwork.multipart.saveDir=d://  \#这个是上传文件的默认保存路径\#

[http_blog.csdn.net_pwlazy_archive_2006_05_11_724735.aspx]: http://blog.csdn.net/pwlazy/archive/2006/05/11/724735.aspx
[http_www.opensymphony.com_xwork_xwork-1.1.1.dtd]: http://www.opensymphony.com/xwork/xwork-1.1.1.dtd