java编写登录接口

好的，下面是一个简单的Java登录接口示例，仅供参考：

import java.util.HashMap;
import java.util.Map;

import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class LoginController {

    private static final Map<String, String> userMap = new HashMap<>(); //模拟用户信息

    static {
        userMap.put("user1", "password1");
        userMap.put("user2", "password2");
        userMap.put("user3", "password3");
    }

    @PostMapping("/login")
    public ResponseEntity<String> login(@RequestBody LoginRequest loginRequest) {
        String username = loginRequest.getUsername();
        String password = loginRequest.getPassword();

        if (userMap.containsKey(username) && userMap.get(username).equals(password)) {
            return new ResponseEntity<>("Login Successful", HttpStatus.OK);
        } else {
            return new ResponseEntity<>("Invalid Username or Password", HttpStatus.UNAUTHORIZED);
        }
    }

    public static class LoginRequest {
        private String username;
        private String password;

        public String getUsername() {
            return username;
        }

        public void setUsername(String username) {
            this.username = username;
        }

        public String getPassword() {
            return password;
        }

        public void setPassword(String password) {
            this.password = password;
        }
    }
}

这个接口使用了Spring Boot框架，其中包括一个`/login`的POST请求，用于接收包含用户名和密码的JSON请求体，并返回登录结果。在实际应用中，你需要更改`userMap`来匹配你自己的用户信息。