HTTP + Connection + Cookie登录后访问其他接口获取JSON数据详解编程语言

SAPHttpTest.java

package com.jake.rabbitmqdemo2.http; 
 
import java.io.*; 
import java.net.HttpURLConnection; 
import java.net.URL; 
 
public class SAPHttpTest { 
 
    private static final String LOGIN_URL = "http://test.jake.com/console/user/login.action"; 
 
 
    /** 
     * 获取登录cookie：JSESSIONID及其对应的值 
     * @return 
     */ 
    private static String getCookieVal() { 
        String cookieVal = null; 
        try { 
            URL url = new URL(LOGIN_URL); 
            HttpURLConnection connection = (HttpURLConnection) url.openConnection(); 
            connection.setDoOutput(true); 
            OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream(), "utf-8"); 
            out.write("username=admin&password=123"); 
            out.flush(); 
            out.close(); 
            cookieVal = connection.getHeaderField("Set-Cookie"); 
        } catch (IOException e) { 
            e.printStackTrace(); 
        } 
        return cookieVal; 
    } 
 
    /** 
     * POST方法访问HTTP接口 
     * @param post_url 
     * @param paramStr 
     */ 
    public static void visitByPost (String post_url, String paramStr) { 
        try { 
            URL url = new URL(post_url); 
            HttpURLConnection connection = (HttpURLConnection) url.openConnection(); 
            String cookieVal = getCookieVal(); 
            if (cookieVal != null) { 
//                String loginCookie = cookieVal.split(";", 2)[0]; // 通过getCookieVal方法获取的不能登录 
                String loginCookie = "JSESSIONID=0000KDoR2_0URHYGKDbFFnLvvbZ:-1"; // postman获取的可以登录 
                connection.setRequestProperty("Cookie", loginCookie); 
            } 
            connection.setDoOutput(true); 
            connection.setDoInput(true); 
            connection.setRequestMethod("POST"); 
            connection.setUseCaches(false); 
            connection.setInstanceFollowRedirects(true); 
            connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=utf-8"); 
            connection.connect(); 
            DataOutputStream dataout = new DataOutputStream(connection.getOutputStream()); 
            dataout.writeBytes(paramStr); 
            dataout.flush(); 
            dataout.close(); 
            BufferedReader bf = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8")); 
            String line; 
            StringBuilder sb = new StringBuilder(); 
            while ((line = bf.readLine()) != null) { 
                sb.append(line).append(System.getProperty("line.separator")); 
            } 
            bf.close(); 
            connection.disconnect(); 
            System.out.println(sb.toString()); 
        } catch (Exception e) { 
            e.printStackTrace(); 
        } 
    } 
 
} 
 

RabbitmqDemo2ApplicationTests.java

package com.jake.rabbitmqdemo2; 
 
import com.jake.rabbitmqdemo2.http.SAPHttpTest; 
import org.junit.Test; 
import org.junit.runner.RunWith; 
import org.springframework.boot.test.context.SpringBootTest; 
import org.springframework.test.context.junit4.SpringRunner; 
 
@RunWith(SpringRunner.class) 
@SpringBootTest 
public class RabbitmqDemo2ApplicationTests { 
 
    @Test 
    public void testFixingsInfo() { 
        String params = "pid=1&pname=螺丝"; 
        SAPHttpTest.visitByPost("http://localhost:8080/erp/product/info", params); 
    } 
 
    @Test 
    public void contextLoads() { 
    } 
 
}