JAVA get、post（body）请求

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.security.MessageDigest;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Map;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import net.sf.json.JSONObject;

public class TOOL {
     
	
	public static void main(String avg[]) {
     
		System.out.println(
				"///\r\n" + 
				"____  ___.__                 ________           \r\n" + 
				"\\   \\/  /|__|_____     ____  \\______ \\  _____   \r\n" + 
				" \\     / |  |\\__  \\   /    \\  |    |  \\ \\__  \\  \r\n" + 
				" /     \\ |  | / __ \\_|   |  \\ |    `   \\ / __ \\_\r\n" + 
				"/___/\\  \\|__|(____  /|___|  //_______  /(____  /\r\n" + 
				"      \\_/         \\/      \\/         \\/      \\/ \r\n" + 
				"\r\n" + 
				"//");
	}
	
	
	
	/**
     * 向指定URL发送GET方法的请求
     * 
     * @param url
     *            发送请求的URL
     * @param param
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return URL 所代表远程资源的响应结果
     */
    public static JSONObject sendGet(String urlNameString) {
     
        String result = "";
        BufferedReader in = null;
        try {
     
//            String urlNameString = url + "?" + param;
            URL realUrl = new URL(urlNameString);
            // 打开和URL之间的连接
            URLConnection connection = realUrl.openConnection();
            // 设置通用的请求属性
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            connection.setRequestProperty("Accept-Charset", "utf-8");
            connection.setRequestProperty("contentType", "utf-8");
            // 建立实际的连接
            connection.connect();
            // 获取所有响应头字段
            Map<String, List<String>> map = connection.getHeaderFields();
            // 遍历所有的响应头字段
            for (String key : map.keySet()) {
     
             //   System.out.println(key + "--->" + map.get(key));
            }
            // 定义 BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(
                    connection.getInputStream(),"utf-8"));
            String line;
            while ((line = in.readLine()) != null) {
     
                result += line;
            }
        } catch (Exception e) {
     
            System.out.println("发送GET请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {
     
            try {
     
                if (in != null) {
     
                    in.close();
                }
            } catch (Exception e2) {
     
                e2.printStackTrace();
            }
        }
        System.out.println("GET请求参数："+urlNameString);
        System.out.println("GET请求结果："+result);
        return JSONObject.fromObject(result);
    }
    
    

    /**
     * 向指定 URL 发送POST方法的请求
     * 
     * @param url
     *            发送请求的 URL
     * @param param
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static JSONObject sendPost(String url, JSONObject param) {
     
    	PrintWriter out = null;
		BufferedReader in = null;
		String result = "";
		try {
     
			URL realUrl = new URL(url);
			// 打开和URL之间的连接
			URLConnection conn = realUrl.openConnection();
			// 设置通用的请求属性
//        Content-Type:application/json;charset=UTF-8 Accept:application/json, text/javascript, */*; q=0.01
			conn.setRequestProperty("Content-Type", "aapplication/json");
			conn.setRequestProperty("charset", "UTF-8");
			conn.setRequestProperty("Accept", "application/json, text/javascript, */*");
			conn.setRequestProperty("q", "0.01");
			conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			// 发送POST请求必须设置如下两行
			conn.setDoOutput(true);
			conn.setDoInput(true);
			// 获取URLConnection对象对应的输出流
			// out = new PrintWriter(conn.getOutputStream());
			out = new PrintWriter(new OutputStreamWriter(conn.getOutputStream(), "utf-8"));
			// 发送请求参数
			out.print(param.toString());
			// flush输出流的缓冲
			out.flush();
			// 定义BufferedReader输入流来读取URL的响应
			// in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
			in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"));
			String line;
			while ((line = in.readLine()) != null) {
     
				result += line;
			}
		} catch (Exception e) {
     
			System.out.println("发送 POST 请求出现异常！" + e);
			e.printStackTrace();
		}
		// 使用finally块来关闭输出流、输入流
		finally {
     
			try {
     
				if (out != null) {
     
					out.close();
				}
				if (in != null) {
     
					in.close();
				}
			} catch (IOException ex) {
     
				ex.printStackTrace();
			}
		}
        System.out.println("POST请求链接："+url);
        System.out.println("POST请求参数："+param);
        System.out.println("POST请求结果："+result);
        if(isJsonObject(result)) {
     
        	return JSONObject.fromObject(result);
        }else {
     
        	return JSONObject.fromObject("{\"errcode\":\"500\",\"msg\":\"请求返回非JSON,返回结果："+result+"\"}");
        }
        
    }    
    /**
    * 判断字符串是否可以转化为json对象
    * @param content
    * @return
    */
    public static boolean isJsonObject(String content) {
     
        // 此处应该注意，不要使用StringUtils.isEmpty(),因为当content为"  "空格字符串时，JSONObject.parseObject可以解析成功，
        // 实际上，这是没有什么意义的。所以content应该是非空白字符串且不为空，判断是否是JSON数组也是相同的情况。
        if(content.trim()==""||content.trim().length()<=0){
     
        	return false;
       }
        try {
     
            JSONObject jsonStr = JSONObject.fromObject(content);
            return true;
        } catch (Exception e) {
     
            return false;
        }
    }
   
}