Httpclient 實現帶參文件上傳

這裏直接貼出的是我封裝好的doPostFile方法,httpclient 的版本是3.1。

    public static String doPostFile(String url, Part[] parts){
        
        String response = null;
        PostMethod postMethod = new PostMethod(url);
        try{             
            //設置請求實體
            postMethod.setRequestEntity(new MultipartRequestEntity(parts,postMethod.getParams()));
            HttpClient client = new HttpClient();
            
            //設置連接超時限度
            client.getHttpConnectionManager().getParams().setConnectionTimeout(5000);
            client.executeMethod(postMethod);
            if(postMethod.getStatusCode() ==  HttpStatus.SC_OK){
                response = new String(postMethod.getResponseBodyAsString().getBytes("utf-8"));
            }
        } catch(Exception e){
            LOGGER.error("HttpServiceSender.doPostFile()",e.getMessage());
        } finally {
            postMethod.releaseConnection();
        }
        
        return response;
    }

調用此方法的代碼，注意參數的傳遞方式

    public String uploadImage(File file,String id,String name){
        
        String result = null;
        try{        
            //文件part,new FilePart添加的是File類型的文件，後面StringPart則爲字符串參數
            Part[] parts = { new FilePart("file", file),
                new StringPart("id", id),  
                new StringPart("id",name)};
            result = HttpServiceSender.doPostFile(SERVER+"service/resource/upload",parts);
            
        }catch(Exception e){
            Logger.error("ImageService.uploadImage()", e.getMessage());           
        }     
        return result;
    }