利用java怎么為移動(dòng)端寫接口

//java端

package cotroller;

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

import javax.servlet.http.HttpServletRequest;

import jdk.nashorn.api.scripting.JSObject;
import model.Student;
import model.Teacher;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;



import dao.Get;
import dao.StudentDAO;

//登陸servlet
@Controller
public class LoginCotroller {  
  /**
   * 1. value="/doLogin/{username}/{password}" 攔截 xxx/doLogin/xx/xx
   * 2. @ResponseBody 使用此注解將返回?cái)?shù)據(jù)類型封裝json
   * 3. @PathVariable("username") 截取請求1.value中{username}的值
   * 4. Map<String, Object> 服務(wù)端將值放入map中再封裝為json,客戶端方便通過key取出value
   */
  
  StudentDAO studentDAO = new StudentDAO();//調(diào)用登陸判斷方法
  
  @RequestMapping(value="/doLogin/{username}/{password}",method=RequestMethod.GET)
  @ResponseBody
  public Map<String, Object> getTeacher(@PathVariable("username") Integer username, @PathVariable("password") String password){  
    System.out.println("攔截了客戶端json請求");
    Map<String, Object> map = new HashMap<String, Object>();
    
    if(studentDAO.loginByStudent(username, password)){
      System.out.println("密碼正確");
      map.put("result", "1");
      return map; //封裝為json返回給客戶端
    }
      
    System.out.println("密碼錯(cuò)誤");
    map.put("result", "0");
    return map; //封裝為json返回給客戶端
  }

}

//ios端
#import <Foundation/Foundation.h>
#import <stdio.h>

int main(int argc, const char * argv[]) {
  @autoreleasepool {
  
    char oldUsername[128];
    char oldPassword[128];
    
    NSLog(@"請輸入用戶名 ：");
    scanf("%s", oldUsername);
    NSString *username = [NSString stringWithUTF8String:oldUsername]; //轉(zhuǎn)換為NSString *
    NSLog(@"請輸入密碼 ：");
    scanf("%s", oldPassword);
    NSString *password = [NSString stringWithUTF8String:oldPassword]; //轉(zhuǎn)換為NSString *
    
    //訪問springMVC后臺(tái)并解析返回的json數(shù)據(jù)
    //定義一個(gè)異常
    NSError *error;
    
    //定義請求action 使用stringWithFormat拼接字符串
    NSString *url = [NSString stringWithFormat:@"http://154212l6t7.imwork.net:27063/partyOS_APP/doLogin/%@/%@", username, password];
    
    //加載一個(gè)NSURL對象
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]];
    
    //發(fā)送請求 將請求的url數(shù)據(jù)放到NSData對象中
    NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
    
    //NSJSONSerialization從response請求中解析出數(shù)據(jù)放到字典中
    NSDictionary *jsonResult = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves error:&error];
    
    NSString *resultValue = [jsonResult objectForKey:@"result"];
    
    NSLog(@"你的url是%@", url);
    NSLog(@"服務(wù)端返回值%@", resultValue);
    
    // oc字符串比較方法 resultValue isEqualToString:@"1"] 和java 的equlse類似
    if([resultValue isEqualToString:@"1"]){
      NSLog(@"登錄成功!");
    }else{
      NSLog(@"登錄失敗,用戶名或密碼錯(cuò)誤!");
    }
    
    
  }
  return 0;
}