文件上传

1. HttpClient模拟表单上传 如果Android中自带的HttpClient不能实现上传的功能，就下载HttpClient 3.1版本

    public void upload(View view){
        HttpClient client = new HttpClient();
         PostMethod filePost = new PostMethod("http://192.168.1.100:8080/web/UploadServlet");;
        try {
            String path = et_path.getText().toString().trim();
            File file = new File(path);
            if(file.exists()&&file.length()>0){
                Part[] parts = {new StringPart("nameaaaa", "valueaaa"), 
                      new StringPart("namebbb", "valuebbb"), 
                      new FilePart("pic", new File(file.getAbsolutePath()))};
              filePost.setRequestEntity(new MultipartRequestEntity(parts, filePost.getParams()));
              client.getHttpConnectionManager().getParams()
                  .setConnectionTimeout(5000);
              int status = client.executeMethod(filePost);
              if(status ==200){
                  Toast.makeText(this, "上传成功", 1).show();
              }else{
                  Toast.makeText(this, "上传失败", 1).show();
              }
            }
            else{
                Toast.makeText(this, "上传的文件不存在", 0).show();
            }
        } catch (Exception e) {
            e.printStackTrace();
            /**如果出现异常一定记得要释放*/
            filePost.releaseConnection();
        }
    }
   

2. 模拟Http请求上传

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