不同springCloud项目互相调用接口

有A,B两个springCloud项目，B项目的提供restful接口供A项目调用，B项目不在A的注册中心，其实跟普通的http接口调用方法一样

代码

A项目

1.调用接口类

public static String defaultConnection(String method, String path, int timeout, int readTimeout, String data)
throws Exception {
URL url=null;
URLConnection con=null;
HttpURLConnection urlCon=null;
String strResponse=null;
StringBuilder sb=new StringBuilder();
int intResponseCode = HttpURLConnection.HTTP_OK;
OutputStream out=null;
InputStream input=null;

//第1步，建立连接
try {
url=new URL(path);
//向某个特定协议对象返回表现http资源连接的引用
con=url.openConnection();
}catch(Exception e) {
e.printStackTrace();
System.out.println(“http连接失败:”+e.getMessage());
}

//第2步，验证连接的类型，必须是HttpURLConnection
if(!(con instanceof HttpURLConnection)){
System.out.println(“http连接失败，连接类型错误”);
}

//第3步，发送报文
try {
//表明程序必须把名称/值对输出到服务器程序资源
con.setConnectTimeout(timeout == 0 1000 : timeout);
con.setReadTimeout(readTimeout == 0 1000 : readTimeout);
con.setRequestProperty(“Content-Type”,“application/json”);

con.setDoOutput(true);
con.setDoInput(true);
//表明只能返回有用的信息
con.setUseCaches(false);
urlCon=(HttpURLConnection)con;
//设置HTTP请求方法
urlCon.setRequestMethod(method);
//获得输出流对象
out=urlCon.getOutputStream();
DataOutputStream dos=new DataOutputStream(out);
dos.write(data.getBytes(“utf-8”));
dos.flush();
}catch(Exception e) {
e.printStackTrace();
System.out.println(“http发送失败:”+e.getMessage());
}finally{
out.close();
}

//第4步，校验返回状态
try {
intResponseCode=urlCon.getResponseCode();
}catch(Exception e) {
e.printStackTrace();
System.out.println(“http返回状态失败:”+e.getMessage());
}
if(intResponseCode!=HttpURLConnection.HTTP_OK){ //如果不为(HTTP_OK)200，说明服务器返回错误
System.out.println(“request “+ urlCon.getURL() +” fail. response: code=”+intResponseCode +
“, message=”+urlCon.getResponseMessage());
}

//第5步，接收报文
try {
input=urlCon.getInputStream();
//将字节流转换为字符流
BufferedReader br=new BufferedReader(new InputStreamReader(input));
while((strResponse=br.readLine())!=null){
sb.append(strResponse);
}
}catch(Exception e){
e.printStackTrace();
System.out.println(“http接收错误:”+e.getMessage());
}finally{
input.close();
//关闭和服务器的连接
urlCon.disconnect();
}
return sb.toString();
}

2. 调用方法

public void testtoken(){

String uuid = “{“accessToken”:“123456”}”;
System.out.println(“uuid==”+uuid);
String responseEntity = “”;
try {
responseEntity = defaultConnection(“POST”, “http://localhost:50666/receiveToken”, 10000, 10000, uuid);
}catch(Exception e){
e.printStackTrace();
}
System.out.println(“responseEntity==”+responseEntity);
}

B项目

@RequestMapping(value = “/receiveToken”, method = RequestMethod.POST)
public void receiveToken(@RequestBody UserParamDto user,HttpServletResponse response) throws Exception {
System.out.println(user.getAccessToken());
PrintWriter out = null;
try {
out = response.getWriter();
System.out.println(out);
out.write(“{“loginName”:“11223344”}”);
} catch (IOException e) {
e.printStackTrace();
} finally {
if (out != null) {
out.close();
}
}
}

结果

A

B