本文最后更新于 916 天前,其中的信息可能已经有所发展或是发生改变。
https://github.com/EchoGroot/fourth_spring_simfyspider.git
REST,即Representational State Transfer,表述行状态转移 Restful架构就是符合Rest原则的软件架构 简单来说,通过网络,将其中的资源(文本、图片、歌曲、服务)的状态改变 具体来说,就是HTTP协议里面,四个表示操作方式的动词:GET、POST、PUT、DELETE。 它们分别对应四种基本操作: GET用来获取资源, POST用来新建资源(也可以用于更新资源), PUT用来更新资源, DELETE用来删除资源。 JSON : JavaScript Object Notation 即JS的对象标记法 JS中用字符串表示对象的表示法 现演变为传输协议和文件格式,App通常用JSON格式与服务器通信 将对象转为JSON的注解 @ResponseBody : 标记将某个方法的返回值自动转换为JSON字符串返回 @RestController : 代替@Controller注解,将整个Controller的所有方法的返回值自动转换为JSON返回 辅助对象: Form对象 : 封装用户请求参数的Java对象 Result对象 : 服务端返回给外部的统一请求格式,具有如下属性 success字段:表示操作是否成功 code字段:操作结果码,自行约定。比如,0000表示成功,1001表示用户不存在 message字段:操作结果信息,文字说明本次操作的结果, data字段:本次操作携带的数据,比如某次查询请求带回的结果列表
开发Controller 创建请求接口 使用Form接收参数 调用service处理登录业务 封装返回结果成JSON 开发Service 调用DAO处理数据 开发DAL 开发模型类 开发Repository
package com.fourth.spring.simfyspider.web;
import com.fourth.spring.simfyspider.common.Result;
import com.fourth.spring.simfyspider.service.LoginService;
import com.fourth.spring.simfyspider.web.form.LoginForm;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class LoginController {
@Autowired
private LoginService loginService;
@RequestMapping("login")
public Result login(LoginForm form){
System.out.println(form);
Boolean loginSuccess=loginService.login(form);
return loginSuccess?Result.success():Result.fail("00000","登陆失败");
}
}
package com.fourth.spring.simfyspider.service;
import com.fourth.spring.simfyspider.web.form.LoginForm;
public interface LoginService {
Boolean login(LoginForm form);
}
package com.fourth.spring.simfyspider.service.impl;
import com.fourth.spring.simfyspider.dal.UserRepository;
import com.fourth.spring.simfyspider.domain.User;
import com.fourth.spring.simfyspider.service.LoginService;
import com.fourth.spring.simfyspider.web.form.LoginForm;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Example;
import org.springframework.stereotype.Service;
import java.util.Optional;
@Service
public class LoginServiceImpl implements LoginService {
@Autowired
private UserRepository userRepository;
@Override
public Boolean login(LoginForm form) {
User user=new User();
user.setUserName(form.getUsrname());
user.setUserPassword(form.getPassword());
Example<User> userExample = Example.of(user);
Optional<User> result=userRepository.findOne(userExample);
return result.isPresent();
}
}
package com.fourth.spring.simfyspider.domain;
import javax.persistence.*;
import java.util.Date;
@Entity
@Table(name = "chinasoft_class_5_login")
public class User {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer userId;
private String userName;
private String userPassword;
private Date lastLoginDate;
public Integer getUserId() {
return userId;
}
public void setUserId(Integer userId) {
this.userId = userId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getUserPassword() {
return userPassword;
}
public void setUserPassword(String userPassword) {
this.userPassword = userPassword;
}
public Date getLastLoginDate() {
return lastLoginDate;
}
public void setLastLoginDate(Date lastLoginDate) {
this.lastLoginDate = lastLoginDate;
}
@Override
public String toString() {
return "User{" +
"userId=" + userId +
", userName='" + userName + '\'' +
", userPassword='" + userPassword + '\'' +
", lastLoginDate=" + lastLoginDate +
'}';
}
}
package com.fourth.spring.simfyspider.dal;
import com.fourth.spring.simfyspider.domain.User;
import org.springframework.data.jpa.repository.JpaRepository;
public interface UserRepository extends JpaRepository<User,Integer> {
}
package com.fourth.spring.simfyspider.common;
public class Result {
private boolean success;
private String code;
private String message;
private Object data;
public boolean isSuccess() {
return success;
}
public void setSuccess(boolean success) {
this.success = success;
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public Object getData() {
return data;
}
public void setData(Object data) {
this.data = data;
}
@Override
public String toString() {
return "Result{" +
"success=" + success +
", code='" + code + '\'' +
", message='" + message + '\'' +
", data=" + data +
'}';
}
public Result(){};
public Result(Boolean success){
this.success=success;
this.code=success?"10000":"00000";
this.message=success?"执行成功":"执行失败";
}
public Result(Boolean success,String code,String message){
this.success=success;
this.code=code;
this.message=message;
}
public Result(Boolean success,String code,String message,Object data){
this.success=success;
this.code=code;
this.message=message;
this.data=data;
}
public static Result success(){
return success(null);
}
public static Result success(Object data){
return new Result(true,"10000","执行成功",data);
}
public static Result fail(String code,String message){
return new Result(false,code,message,null);
}
public static Result generalFail(){
return fail("00000","未知错误");
}
}
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