public static String doGet(String url, String charset) {

//1.生成HttpClient对象并设置参数

HttpClient httpClient = new HttpClient();

//设置Http连接超时为5秒

httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(5000);

//2.生成GetMethod对象并设置参数

GetMethod getMethod = new GetMethod(url);

//设置get请求超时为5秒

getMethod.getParams().setParameter(HttpMethodParams.SO_TIMEOUT, 5000);

//设置请求重试处理，用的是默认的重试处理：请求三次

getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler());

String response = "";

//3.执行HTTP GET 请求

try {

int statusCode = httpClient.executeMethod(getMethod);

//4.判断访问的状态码

if (statusCode != HttpStatus.SC_OK) {

System.err.println("请求出错：" + getMethod.getStatusLine());

}

//5.处理HTTP响应内容

//HTTP响应头部信息，这里简单打印

Header[] headers = getMethod.getResponseHeaders();

for(Header h : headers) {

System.out.println(h.getName() + "---------------" + h.getValue());

}

//读取HTTP响应内容，这里简单打印网页内容

//读取为字节数组

byte[] responseBody = getMethod.getResponseBody();

response = new String(responseBody, charset);

System.out.println("-----------response:" + response);

//读取为InputStream，在网页内容数据量大时候推荐使用

//InputStream response = getMethod.getResponseBodyAsStream();

} catch (HttpException e) {

//发生致命的异常，可能是协议不对或者返回的内容有问题

System.out.println("请检查输入的URL!");

e.printStackTrace();

} catch (IOException e) {

//发生网络异常

System.out.println("发生网络异常!");

} finally {

//6.释放连接

getMethod.releaseConnection();

}

return response;

}

public static String doPost(String url, JSONObject json){

HttpClient httpClient = new HttpClient();

PostMethod postMethod = new PostMethod(url);

postMethod.addRequestHeader("accept", "*/*");

postMethod.addRequestHeader("connection", "Keep-Alive");

//设置json格式传送

postMethod.addRequestHeader("Content-Type", "application/json;charset=GBK");

//必须设置下面这个Header

postMethod.addRequestHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36");

//添加请求参数

postMethod.addParameter("commentId", json.getString("commentId"));

String res = "";

try {

int code = httpClient.executeMethod(postMethod);

if (code == 200){

res = postMethod.getResponseBodyAsString();

System.out.println(res);

}

} catch (IOException e) {

e.printStackTrace();

}

return res;

}