如何使用Apache Commons文件上傳從servlet上傳文件？

Question

我需要從服務器端上傳一個xml文件，其中文件的內容是一個字符串。我怎樣才能使這個文件內容上傳（基本上保存）在服務器上？

這就是我正在嘗試，它工作正常，如果我直接給文件FileBody，但如何欺騙它有filecontents去多個請求的另一個servlet？

private def createConfiguration(def sessiontoken) 
{ 
    def xmlString="" 
    HttpClient httpclient = new DefaultHttpClient(); 
    try { 

     HttpPost httppost = new HttpPost(fileParams.create); 

     //FileBody bin = new FileBody(new File("C:\\Simon\\myxml.xml")); 
     StringBody st = new StringBody(sessiontoken); 
     StringBody cfgname = new StringBody(reqParams.c_Cfgname[0]); 
     StringBody cfgdesc = new StringBody(reqParams.c_Cfgdesc[0]); 
     StringBody cfgtype = new StringBody(reqParams.c_Cfgtype[0]); 
     StringBody cfgfile = new StringBody(reqParams.CFGFILE[0]); 

     MultipartEntity reqEntity = new MultipartEntity(); 
     reqEntity.addPart("sessiontoken", st); 
     reqEntity.addPart("cfgname", cfgname); 
     reqEntity.addPart("cfgdesc", cfgdesc); 
     reqEntity.addPart("cfgenv", cfgtype); 
     //reqEntity.addPart("cfgfile", bin); 
     reqEntity.addPart("cfgfile", cfgfile); 

     httppost.setEntity(reqEntity); 

     System.out.println("executing request " + httppost.getRequestLine()); 
     HttpResponse response = httpclient.execute(httppost); 
     HttpEntity resEntity = response.getEntity(); 

     System.out.println("----------------------------------------"); 
     //System.out.println(response.getStatusLine()); 
     if (resEntity != null) { 
      //System.out.println("Response content length: " + resEntity.getContentLength()); 
      xmlString=resEntity.getContent().getText() 
     } 
     EntityUtils.consume(resEntity); 
    } finally { 
     try { httpclient.getConnectionManager().shutdown(); } catch (Exception ignore) {} 
    } 
    xmlString 
} 

如果我用上面的代碼中，我得到了下面的異常

---------------------------------------- 



Exception while processing your Request. 
No result defined for action com.abc.dc.actions.CreateConfiguration and 
result input 

更新

所以現在檢查Tomcat的日誌&其他服務器端代碼後，我才知道內部dc變得cfgfile並將其設置爲

public void setCfgfile(File cfgfile) 
{ 
    this.cfgfile = cfgfile 
} 

這給了我

java.lang.NoSuchMethodException: com.abc.dc.actions.CreateConfiguration.setCfgfile([Ljava.lang.String;) 

所以，我怎麼可以重載setCfgfile法public void setCfgfile(String cfgfile)和轉換cfgfile爲File對象嗎？

，甚至更好，

我如何轉換這種cfgfile字符串變量爲FileBody對象？

Answer 1

最後這裏是我如何做它的工作:)

private def sendRequest(def sessiontoken,def sendUrl) 
{ 
    logger.debug("Inside sendRequest to: "+sendUrl) 
    def xmlString="" 
    HttpClient httpclient = new DefaultHttpClient(); 
    try { 

     HttpPost httppost = new HttpPost(sendUrl); 

     def filename=reqParams.filename 
     logger.debug("Filename: "+filename) 
     FileBody bin = new FileBody(writeToFile(filename,reqParams.cfgfile)); 
     StringBody st = new StringBody(sessiontoken); 
     StringBody cfgid=new StringBody("") 
     if(reqParams.containsKey('cfgfile')&&reqParams.cfgid!=null) 
     { 
      cfgid= new StringBody(reqParams.cfgid); 
     } 

     StringBody cfgname = new StringBody(reqParams.cfgname); 
     StringBody cfgdesc = new StringBody(reqParams.cfgdesc); 
     StringBody cfgenv = new StringBody(reqParams.cfgenv); 

     logger.debug("attaching multipart") 
     MultipartEntity reqEntity = new MultipartEntity(); 
     reqEntity.addPart("sessiontoken", st); 
     reqEntity.addPart("cfgid", cfgid); 
     reqEntity.addPart("cfgname", cfgname); 
     reqEntity.addPart("cfgdesc", cfgdesc); 
     reqEntity.addPart("cfgenv", cfgenv); 
     reqEntity.addPart("cfgfile", bin); 

     httppost.setEntity(reqEntity); 

     HttpResponse response = httpclient.execute(httppost); 
     HttpEntity resEntity = response.getEntity(); 

     if (resEntity != null) { 
      xmlString=resEntity.getContent().getText() 
     } 
     EntityUtils.consume(resEntity); 
    } finally { 
     try { httpclient.getConnectionManager().shutdown(); } catch (Exception ignore) {} 
    } 
    xmlString 
}