SWFUpload 文件上传详解

package com.action;  
  
import java.io.File;  
import java.io.FileInputStream;  
import java.io.FileOutputStream;  
import java.io.InputStream;  
import java.io.OutputStream;  
  
import org.apache.struts2.ServletActionContext;  
import com.opensymphony.xwork2.ActionSupport;  
  
public class FileUploadAction extends ActionSupport {  
    private File file;  
    private String fileFileName;  
    private String fileContentType;  
    private String savePath;  
  
    public String execute() throws Exception {  
          
        InputStream is = new FileInputStream(file);  
        String root = getSavePath();  
        //String tempName = System.currentTimeMillis()+this.getFileFileName().substring(this.getFileFileName().indexOf("."));     
        File deskFile = new File(root, this.getFileFileName());  
        OutputStream os = new FileOutputStream(deskFile);  
        byte[] bytefer = new byte[1024];  
        int length = 0;  
        while ((length = is.read(bytefer)) != -1) {  
            os.write(bytefer, 0, length);  
        }  
        os.close();  
        is.close();  
        return "success";  
    }  
  
      
    public String getSavePath() {  
        return ServletActionContext.getServletContext().getRealPath(savePath);  
    }  
  
  
    public void setSavePath(String savePath) {  
        this.savePath = savePath;  
    }  
  
  
    public File getFile() {  
        return file;  
    }  
  
    public void setFile(File file) {  
        this.file = file;  
    }  
  
    public String getFileFileName() {  
        return fileFileName;  
    }  
  
    public void setFileFileName(String fileFileName) {  
        this.fileFileName = fileFileName;  
    }  
  
    public String getFileContentType() {  
        return fileContentType;  
    }  
  
    public void setFileContentType(String fileContentType) {  
        this.fileContentType = fileContentType;  
    }  
  
}  

this.fileProgressElement.childNodes[3].className = "progressBarInProgress";  
this.fileProgressElement.childNodes[3].style.width = percentage + "%";  

// Fades out and clips away the FileProgress box.  
FileProgress.prototype.disappear = function () {//…}  

upload_url: "<%=basePath%>upload?action=up",  

post_params: {  
                "hello" : "Here I Am",  
                "name" : "张三",  
                "ff" : document.getElementById("tf").value  
            },  
  
use_query_string : true,//要传递参数用到的配置  

addPostParam("myFileName",encodeURI(file.name));//这个是我用来传递文件名称的  

function uploadStart(file) {  
    try {  
        /* I don't want to do any file validation or anything,  I'll just update the UI and return true to indicate that the upload should start */  
        var progress = new FileProgress(file, this.customSettings.progressTarget);  
          
        //progress.setStatus("Uploading...");  
        progress.setStatus("上传中...");  
        progress.toggleCancel(true, this);  
        this.setPostParams({   
              'fileName':encodeURIComponent(file.name)   
              });   
    }  
    catch (ex) {  
    }  
      
    return true;  
}  

//……  
//返回页面信息  
       HttpServletResponse response=ServletActionContext.getResponse();  
       response.setContentType("text/html; charset=UTF-8");  
        response.setHeader("Cache-Control", "no-cache");  
        PrintWriter out = response.getWriter();  
        out.write(“action返回的参数”);  
          
        out.flush();  
        out.close();  
  
      return SUCCESS;  

/**在设置时需要设置一下上传事件  
  *upload_start_handler : UploadStart,  
  *动态传参数，解决文件名中文乱码问题  
**/    
function uploadStart(file) {  
    try {  
        /* I don't want to do any file validation or anything,  I'll just update the UI and return true to indicate that the upload should start */  
        var progress = new FileProgress(file, this.customSettings.progressTarget);  
          
        //progress.setStatus("Uploading...");  
        progress.setStatus("上传中...");  
        progress.toggleCancel(true, this);  
        this.setPostParams({   
              'fileName':<span style="color: #ff0000;">encodeURIComponent(file.name)   
</span>           });   
    }  
    catch (ex) {  
    }  
      
    return true;  
}  

fileName = URLDecoder.decode(fileName, "UTF-8");