访问Http接口的两种请求方式

1. POST方式请求

public void testPostLogin() throws Exception{
String url = "http://192.168.1.160:8080/app/user/login.xhtml";
Map<String,String> paramMap = new HashMap<String,String>();
paramMap.put("username","ting");
paramMap.put("password","1");
URL realUrl = new URL(url);
// 打开与URL之间的链接
URLConnection conn = realUrl.openConnection();
// 设置通用的请求属性
conn.setRequestProperty("accept","*/*");
conn.setRequestProperty("connection","Keep-Alive");
conn.setRequestProperty("user-agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)\"");
conn.setRequestProperty("Charset","UTF-8");
//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
PrintWriter out = new PrintWriter(conn.getOutputStream());
// 设置请求属性
String param = "";
if(paramMap!=null&&paramMap.size()>0){
for(Map.Entry<String,String> entry :paramMap.entrySet()){
String key = entry.getKey();
String value = entry.getValue();
param += (key+"="+value+"&");
}
param = param.substring(0,param.length()-1);
}
// 发送请求参数
out.print(param);
// flush输出流缓冲
out.flush();
// 定义BufferedReader输入流来读取URL的响应
BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream(),"UTF-8"));
String line ;
String result = "" ;
while((line=reader.readLine())!=null){
result +=line;
}
JSONParser parser = new JSONParser();
JSONObject jsonObject = (JSONObject)parser.parse(result);
Object regFlag = jsonObject.get("retFlag");
Object message = jsonObject.get("message");
Object data = jsonObject.get("data");
jsonObject = (JSONObject)parser.parse(data.toString());
Object id = jsonObject.get("id");
Object username = jsonObject.get("username");
System.out.print(result);
}
2. GET方式请求
public void testGetLogin() throws Exception{
URL url = new URL("http://192.168.1.160:8080/app/user/login.xhtml?username=ting&password=1");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.connect();
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(),"UTF-8"));
String line ;
StringBuilder sb = new StringBuilder();
while((line=reader.readLine())!=null){
sb.append(line);
}
connection.disconnect();
JSONParser parser = new JSONParser();
JSONObject jsonObject = (JSONObject)parser.parse(sb.toString());
Object regFlag = jsonObject.get("retFlag");
Object message = jsonObject.get("message");
Object data = jsonObject.get("data");
jsonObject = (JSONObject)parser.parse(data.toString());
Object id = jsonObject.get("id");
Object username = jsonObject.get("username");

System.out.print(sb.toString());
}