packagecom.bs.utils;importjava.io.BufferedReader;importjava.io.InputStreamReader;importjava.io.PrintWriter;.URL;.URLConnection;importjava.util.List;importjava.util.Map;public classBackEndHttpRequest {/*** 向指定的URL发送GET方法的请求
*@paramurl 发送请求的URL
*@paramparam 请求参数，请求参数应该是 name1=value1&name2=value2 的形式
*@return远程资源的响应结果*/
public staticString sendGet(String url, String param) {
String result= "";
BufferedReader bufferedReader= null;try{//1、读取初始URL
String urlNameString = url + "?" +param;//2、将url转变为URL类对象
URL realUrl = newURL(urlNameString);//3、打开和URL之间的连接
URLConnection connection =realUrl.openConnection();//4、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("Content-Type", "application/json; charset=utf-8");//5、建立实际的连接
connection.connect();//获取所有响应头字段
Map> 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));
}//6、定义BufferedReader输入流来读取URL的响应内容 ，UTF-8是后续自己加的设置编码格式，也可以去掉这个参数
bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream(),"UTF-8"));
String line= "";while(null != (line =bufferedReader.readLine())) {
result+=line;
}//int tmp;//while((tmp = bufferedReader.read()) != -1){//result += (char)tmp;//}
}catch(Exception e) {//TODO: handle exception
System.out.println("发送GET请求出现异常！！！" +e);
e.printStackTrace();
}finally { //使用finally块来关闭输入流
try{if(null !=bufferedReader) {
bufferedReader.close();
}
}catch(Exception e2) {//TODO: handle exception
e2.printStackTrace();
}
}returnresult;
}/*** 向指定的URL发送POST方法的请求
*@paramurl 发送请求的URL
*@paramparam 请求参数，请求参数应该是 name1=value1&name2=value2 的形式
*@return远程资源的响应结果*/
public staticString sendPost(String url, String param) {
String result= "";
BufferedReader bufferedReader= null;
PrintWriter out= null;try{//1、2、读取并将url转变为URL类对象
URL realUrl = newURL(url);//3、打开和URL之间的连接
URLConnection connection =realUrl.openConnection();//4、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)");//发送POST请求必须设置如下两行
connection.setDoInput(true);
connection.setDoOutput(true);//5、建立实际的连接//connection.connect();//获取URLConnection对象对应的输出流
out = newPrintWriter(connection.getOutputStream());//发送请求参数
out.print(param);//flush输出流的缓冲
out.flush();//
//6、定义BufferedReader输入流来读取URL的响应内容
bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream(),"UTF-8"));
String line;while(null != (line =bufferedReader.readLine())) {
result+=line;
}
}catch(Exception e) {//TODO: handle exception
System.out.println("发送POST请求出现异常！！！" +e);
e.printStackTrace();
}finally { //使用finally块来关闭输出流、输入流
try{if(null !=out) {
out.close();
}if(null !=bufferedReader) {
bufferedReader.close();
}
}catch(Exception e2) {//TODO: handle exception
e2.printStackTrace();
}
}returnresult;
}
}
