用webwork的fileUploadInterceptor实现文件上传功能 

1、upload.jsp
<ww:form name="form1" action="upload.action"  method="post"  enctype="multipart/form-data"> 
<ww:file name="file" label="picture"/> 
<ww:submit /> 
</ww:form> 
2、DocUpload.java
public class DocUpload extends ActionSupport { 
//upload file 
/*file可以任意命名，但是其他两个变量的命名规则是file+ContentType和
file+FileName，或者如果命名这里不注意，则在变量的setter和getter那里就要注意了，一定要是getFileFileName和getFileContentType*/
private String fileContentType; //文件的类型
private String fileFileName; //文件名
private File file; //文件
private User user; 
public String uploadFile() 
{ 
Map session=ActionContext.getContext().getSession(); 
if(session!=null) 
user=(User)session.get("user"); 
upload(); 
System.out.println("caption="+fileFileName); 
return SUCCESS; 
} 
//上传文件 
private void upload() 
{ 
if(file!=null) 
{ 
FileOutputStream outputStream; 
try { 
ResourceBundle rb = ResourceBundle.getBundle("config");   
 
String fileDir = rb.getString("saveDir")+user.getId()+File.separator;  
        String filePath=fileDir+fileFileName; 
try{ 
//创建目录 
File f=new File(fileDir);   
f.mkdirs(); 
}catch(Exception e) 
{ 
e.printStackTrace(); 
} 
outputStream = new FileOutputStream(filePath);
FileInputStream fileIn = new FileInputStream(file); 
byte[] buffer = new byte[1024]; 
int len; 
while ((len = fileIn.read(buffer)) > 0) 
{ 
outputStream.write(buffer, 0, len); 
} 
fileIn.close(); 
outputStream.close(); 
} catch (FileNotFoundException e) { 
e.printStackTrace(); 
} catch (IOException e) { 
e.printStackTrace(); 
} 
System.out.println("uploadfile name="+fileFileName); 
} 
else 
{ 
System.out.println("file is null!"); 
} 
} 
 
public String getFileContentType() { 
return fileContentType; 
} 
public void setFileContentType(String contentType) { 
this.fileContentType = contentType; 
} 
public File getFile() { 
return file; 
} 
public void setFile(File file) { 
this.file = file; 
} 
public String getFileFileName() { 
return fileFileName; 
} 
public void setFileFileName(String fileName) { 
this.fileFileName = fileName; 
}

 

3、xwork.xml中的相关配置 

<action name="upload" class="DocUpload" method="uploadFile"> 
   <interceptor-ref name="fileUpload" /> 
   <interceptor-ref name="defaultStack" /> <!-- must be defaultStack -->
   <result name="success">/sys/uploadsuccess.jsp</result> 
   <result name="input">/sys/upload.jsp</result> 
</action>

 

4、webwork.properties的相关配置 

webwork.multipart.parser=jakarta 
#file upload temp save 
webwork.multipart.saveDir=d:/temp

其中，webwork.multipart.parser是设置处理上传的类的，有cos jakarta pell 三种设置， jakarta是默认的设置；注意设置了相应的类要把相应的jar放进来； 

webwork.multipart.saveDir是设置临时保存文件的文件夹； 

5、config.properties用来设置上传图片的保存路径,不是webwork上传功能必须的配置 

#windows 
saveDir=D:/Tomcat 5.5/webapps/pxbn/upload/ 
#linux 
#saveDir=/home/web/tomcat/webapps/pxbn/upload/