使用工具类发送Http的Post请求并携带登录参数进行登录，请求完成后接收token返回值存入文件
Http请求工具类
package com.fk.miaosha.util;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;
/**
* @author fengkai
* @since 2021/6/2
*/
public class HttpRequest {
/**
* 向指定URL发送GET方法的请求
*
* @param url
* 发送请求的URL
* @param param
* 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
* @return URL 所代表远程资源的响应结果
*/
public static String sendGet(String url, String param) {
String result = "";
BufferedReader in = null;
try {
String urlNameString = url + "?" + param;
URL realUrl = new URL(urlNameString);
// 打开和URL之间的连接
URLConnection connection = realUrl.openConnection();
// 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)");
// 建立实际的连接
connection.connect();
// 获取所有响应头字段
Map<String, List<String>> 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));
}
// 定义 BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(
connection.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送GET请求出现异常！" + e);
e.printStackTrace();
}
// 使用finally块来关闭输入流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return result;
}
/**
* 向指定 URL 发送POST方法的请求
*
* @param url
* 发送请求的 URL
* @param param
* 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
* @return 所代表远程资源的响应结果
*/
public static String sendPost(String url, String param) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
// 打开和URL之间的连接
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)");
// 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
out = new PrintWriter(conn.getOutputStream());
// 发送请求参数
out.print(param);
// flush输出流的缓冲
out.flush();
// 定义BufferedReader输入流来读取URL的响应
in = new BufferedReader(
new InputStreamReader(conn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送 POST 请求出现异常！"+e);
e.printStackTrace();
}
//使用finally块来关闭输出流、输入流
finally{
try{
if(out!=null){
out.close();
}
if(in!=null){
in.close();
}
}
catch(IOException ex){
ex.printStackTrace();
}
}
return result;
}
}
请求接口
@Controller
@RequestMapping("/login")
public class LoginController {
private static Logger log = LoggerFactory.getLogger(LoginController.class);
@Autowired
private UserService userService;
@PostMapping("/do_login")
@ResponseBody
public Result doLogin(HttpServletResponse resp, @Valid LoginVo loginVo){
log.info(loginVo.toString());
//登录,如果错误就抛给全局异常处理器
String token = userService.login(resp, loginVo);
return Result.success(token);
}
}
Jdbc连接工具类
public class DBUtil {
public static Connection getConn() throws Exception{
Class.forName("com.mysql.cj.jdbc.Driver");
return DriverManager.getConnection("jdbc:mysql://47.98.47.1:3306/miaosha?useUnicode=true&useSSL=false&characterEncoding=utf-8&serverTimezone=Asia/Shanghai",
"root", "Mysql123.");
}
public static void main(String[] args) throws Exception {
Connection conn = DBUtil.getConn();
}
}
请求方法
private static void createUser(int count) throws Exception{
List<User> users = new ArrayList<User>(count);
//生成用户
for(int i=0;i<count;i++) {
User user = new User();
user.setId(13000000000L+i);
user.setLoginCount(1);
user.setNickname("user"+i);
user.setRegisterDate(new Date());
user.setSalt("1a2b3c4d");
user.setPassword(MD5Util.inputPassToDbPass("123456", user.getSalt()));
users.add(user);
}
System.out.println("create user");
// //生成用户插入数据库
// Connection conn = DBUtil.getConn();
// String sql = "insert into seckill_user(login_count, nickname, register_date, salt, password, id)values(?,?,?,?,?,?)";
// PreparedStatement pstmt = conn.prepareStatement(sql);
// for(int i=0;i<users.size();i++) {
// User user = users.get(i);
// pstmt.setInt(1, user.getLoginCount());
// pstmt.setString(2, user.getNickname());
// pstmt.setTimestamp(3, new Timestamp(user.getRegisterDate().getTime()));
// pstmt.setString(4, user.getSalt());
// pstmt.setString(5, user.getPassword());
// pstmt.setLong(6, user.getId());
// pstmt.addBatch();
// }
// pstmt.executeBatch();
// pstmt.close();
// conn.close();
// System.out.println("insert to db");
//登录，生成token
String urlString = "http://localhost:8080/login/do_login";
File file = new File("D:/tokens.txt");
if(file.exists()) {
file.delete();
}
RandomAccessFile raf = new RandomAccessFile(file, "rw");
file.createNewFile();
raf.seek(0);
for(int i=0;i<users.size();i++) {
User user = users.get(i);
String param = "mobile="+user.getId()+"&password="+MD5Util.inputPassToFormPass("123456");
String result = HttpRequest.sendPost(urlString, param);
JSONObject jo = JSONObject.parseObject(result);
String token = jo.getString("data");
System.out.println("create token : " + user.getId());
String row = user.getId()+","+token;
raf.seek(raf.length());
raf.write(row.getBytes());
raf.write("\r\n".getBytes());
System.out.println("write to file : " + user.getId());
}
raf.close();
System.out.println("over");
}
原文：https://www.cnblogs.com/fkPrograming/p/14842996.html