java中怎样用post、get、put请求

java中我们有时需要调用第三方的接口，但是第三方的接口都是http形式的，这是需要用post,get,put请求类型请求

1、GET方式请求

public static String httpGet(String getUrl,Map<String, String> getHeaders) throws IOException {
URL getURL = new URL(getUrl);
HttpURLConnection connection = (HttpURLConnection) getURL.openConnection();

connection.setRequestProperty("accept", "*/*");
    connection.setRequestProperty("connection", "Keep-Alive");
    connection.setRequestProperty("user-agent",
            "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");//在get请求中这是能在各个浏览器兼容json
   if(getHeaders != null) {
       for(String pKey : getHeaders.keySet()) {
           connection.setRequestProperty(pKey, getHeaders.get(pKey));
       }
   }
   connection.connect();
   BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
   StringBuilder sbStr = new StringBuilder();
   String line;
   while ((line = bufferedReader.readLine()) != null) {
       sbStr.append(line);
   }
   bufferedReader.close();
   connection.disconnect();
   return new String(sbStr.toString().getBytes(),"utf-8");
}

2、POST方式请求

public static String httpPost(String postUrl,Map<String, String> postHeaders, String postEntity) throws IOException {
       URL postURL = new URL(postUrl);
       HttpURLConnection httpURLConnection = (HttpURLConnection) postURL.openConnection();
       httpURLConnection.setDoOutput(true);
       httpURLConnection.setDoInput(true);
       httpURLConnection.setRequestMethod("POST");
       httpURLConnection.setUseCaches(false);
       httpURLConnection.setInstanceFollowRedirects(true);
       //application/json x-www-form-urlencoded
       //httpURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
       httpURLConnection.setRequestProperty("Content-Type", "application/json;charset=utf-8");
       StringBuilder sbStr = new StringBuilder();
       if(postHeaders != null) {
           for(String pKey : postHeaders.keySet()) {
               httpURLConnection.setRequestProperty(pKey, postHeaders.get(pKey));
           }
       }
       if(postEntity != null) {
             JSONObject obj = new JSONObject();
             obj.put("plate",postEntity);
           PrintWriter out = new PrintWriter(new OutputStreamWriter(httpURLConnection.getOutputStream(),"utf-8"));
           out.println(obj);
           out.close();
           //httpURLConnection.getInputStream()
           BufferedReader in = new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream(),"utf-8")); //解决返回值汉字乱码的问题

           String inputLine;
           while ((inputLine = in.readLine()) != null) {
               sbStr.append(inputLine);
           }
           in.close();
       }
       httpURLConnection.disconnect();
       System.out.println("fsdfdf:"+sbStr.toString());
       return new String(sbStr.toString().getBytes(),"utf-8");
   }

3、PUT请求

public static String HttpPut(String postUrl,Map<String, String> postHeaders,String postEntity) throws Exception {
       URL postURL = new URL(postUrl);
       HttpURLConnection httpURLConnection = (HttpURLConnection) postURL.openConnection();
       httpURLConnection.setDoOutput(true);
       httpURLConnection.setDoInput(true);
       httpURLConnection.setRequestMethod("PUT");
       httpURLConnection.setUseCaches(false);
       httpURLConnection.setInstanceFollowRedirects(true);
       //application/json x-www-form-urlencoded
       //httpURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");//表单上传的模式
       httpURLConnection.setRequestProperty("Content-Type", "application/json;charset=utf-8");//json格式上传的模式
       StringBuilder sbStr = new StringBuilder();
       if(postHeaders != null) {
           for(String pKey : postHeaders.keySet()) {
               httpURLConnection.setRequestProperty(pKey, postHeaders.get(pKey));
           }
       }
       if(postEntity != null) {
             JSONObject obj = new JSONObject();
             obj.put("plate","京NB1314");
           PrintWriter out = new PrintWriter(new OutputStreamWriter(httpURLConnection.getOutputStream(),"utf-8"));
           out.println(obj);
           out.close();
           BufferedReader in = new BufferedReader(new InputStreamReader(httpURLConnection
                    .getInputStream()));

           String inputLine;
           while ((inputLine = in.readLine()) != null) {
               sbStr.append(inputLine);
           }
           in.close();
       }
       httpURLConnection.disconnect();
       return new String(sbStr.toString().getBytes(),"utf-8");
    }

java中怎样用post、get、put请求相关推荐

JAVA中.jsp模板文件AJAX异步请求 - 数据渲染问题
JAVA中.jsp模板文件AJAX异步请求 - 数据渲染失败,谁的过失? 后端已经查询出来结果,但是返回的API接口response查看不到对应的信息.(即:后台有,前台没有) 原因分析: 是因为AJ ...
Java中SSM框架解决跨域请求
方法一:@CrossOrigin注解的方法,只能作用在一个Controller层直接在Controller类或方法前加上@CrossOrigin注解即可允许所有ip跨域访问加在Controller ...
java中使用okhttpsoap,Android okHttp网络请求之Retrofit+Okhttp+RxJava组合
Retrofit介绍: Retrofit和okHttp师出同门,也是Square的开源库,它是一个类型安全的网络请求库,Retrofit简化了网络请求流程,基于OkHtttp做了封装,解耦的更彻底:比 ...
java中的multipart_Java 处理 multipart/mixed 请求
一.multipart/mixed 请求 multipart/mixed 和 multipart/form-date 都是多文件上传的格式.区别在于:multipart/form-data 是一种特殊 ...
java中http解析url,java url 编码（解析http请求汉语言地址）
java url 编码(解析http请求中文地址 ) 在近在做项目的过程中,由于客户那边服务器上提供的有很多中文结构目录.请求要的地址不能正常运行显示出来.下面来分享一下我对http协议处理请求中文的 ...
Java 中如何模拟真正的同时并发请求？
有时需要测试一下某个功能的并发性能,又不要想借助于其他工具,索性就自己的开发语言,来一个并发请求就最方便了. java中模拟并发请求,自然是很方便的,只要多开几个线程,发起请求就好了.但是,这种请求, ...
java http请求乱码_怎么解决java中的http请求乱码
怎么解决java中的http请求乱码发布时间:2020-06-23 20:00:11 来源:亿速云阅读:90 作者:元一怎么解决java中的http请求乱码?针对这个问题,今天小编总结了这篇文章 ...
java curl get_如何从Java中的curl get请求获取文件？
我正在尝试使用API下载一些XBRL文件.为了做到这一点,我需要做一个卷曲的请求,就像这样:如何从Java中的curl get请求获取文件? curl -XGET http://distribut ...
java请求参数_在Java中发送http的post请求,设置请求参数等等
前几天做了一个定时导入数据的接口,需要发送http请求,第一次做这种的需求,特地记一下子, 导包 import java.text.SimpleDateFormat; import java.util ...
java curl 使用方法_如何在Java中使用这个cURL POST请求?(Spotify API)
我需要帮助在Java中发出cURL POST请求(到spotifyapi).我把我的解决办法解释得太离谱了 this article . 基于此,我尝试了以下方法: String command = ...

java中怎样用post、get、put请求

java中怎样用post、get、put请求相关推荐

最新文章

热门文章