HttpURLConnection 实现登录SpringBoot后台项目

首先是SpringBoot的controller，如下：

import cn.cheng.bean.User;
import org.springframework.web.bind.annotation.*;
import javax.servlet.http.HttpServletResponse;

@RestController
public class TestController {

    @PostMapping("/getDate")
    public String getDate(@RequestBody User user, HttpServletResponse response) {
        if (user == null || !user.getUsername().equals("root") || !user.getPassword().equals("1234")) {
            return "参数错误";
        }

        response.setHeader("authorization", "55555");
        return "success";
    }

}

接着是HttpURLConnection实现登录，并获取token信息，代码如下：

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.List;
import java.util.Map;

public class DoMain {
    public static void main(String args[]) {
        new Thread(()->{
            String data = "";
            HttpURLConnection conn = null;
            OutputStreamWriter osw = null;
            BufferedInputStream bis = null;
            ByteArrayOutputStream baos = null;
            try {
                conn = (HttpURLConnection) new URL("http://localhost:8080/getDate").openConnection();
                conn.setDoInput(true);
                conn.setDoOutput(true);
                conn.setRequestMethod("POST");
                conn.setRequestProperty("Content-Type", "application/json");
                osw = new OutputStreamWriter(conn.getOutputStream());
                osw.write("{"username": "root","password": "1234"}");
                osw.close();

                Map> map = conn.getHeaderFields();

                System.out.println(map.get("authorization")+ "------------------");
                if (conn.getResponseCode() == 200) {
                    bis = new BufferedInputStream(conn.getInputStream());
                    baos = new ByteArrayOutputStream();
                    byte[] buff = new byte[1024];
                    int len = 0;
                    if ((len = bis.read(buff)) != -1) {
                        baos.write(buff,0,len);
                    }
                    data = baos.toString();
                    System.out.println(data);
                }

            } catch (IOException e) {
                e.printStackTrace();
            } finally {
               if (osw != null) {
                    try {
                        osw.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                if (baos != null) {
                    try {
                        baos.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                if (bis != null) {
                    try {
                        bis.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                if (conn != null) {
                    conn.disconnect();
                }
            }
        }).start();
    }
}

以上全部，可供参考哈！