Restful

1.特点

• RESTful是一种架构风格，强调简单、轻量级和对资源的状态less操作。
• RESTful是通过HTTP协议进行通信的。
• RESTful的应用程序可以调用运行在不同服务器上的服务或函数。
• RESTful的接口通常使用JSON，但实际上它们都支持多种数据格式。
• RESTful的接口都是无状态的，意味着每个请求都是独立的，服务器不会保存之前请求的状态。
• RESTful的接口通常使用JSON。JSON更简洁，易于解析。
• RESTful的接口通常不使用SOAP协议，也不遵循WS-*标准，更加简单和灵活。
• RESTful的接口遵循REST架构原则，使用标准的HTTP方法（如GET, POST, PUT, DELETE）进行资源的操作。
• RESTful的接口更简单、更轻量级，通常更易于开发和维护

2.Rest设计规范

3.基于通用Mapper的Rest编写API

启动类

package com.saddam;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import tk.mybatis.spring.annotation.MapperScan;@SpringBootApplication
//扫描mybatis通用mapper
@MapperScan(basePackages = "com.saddam.mapper")
public class Application {public static void main(String[] args) {SpringApplication.run(Application.class,args);}
}

mapper

package com.saddam.mapper;import com.saddam.my.mapper.MyMapper;
import com.saddam.pojo.Stu;public interface StuMapper extends MyMapper<Stu> {
}

mapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.saddam.mapper.StuMapper" ><resultMap id="BaseResultMap" type="com.saddam.pojo.Stu" ><!--WARNING - @mbg.generated--><id column="id" property="id" jdbcType="INTEGER" /><result column="name" property="name" jdbcType="VARCHAR" /><result column="age" property="age" jdbcType="INTEGER" /></resultMap>
</mapper>

service

package com.saddam.service;import com.saddam.pojo.Stu;public interface StuService {public Stu getStuInfo(int id);public void saveStu();public void updateStu(int id);public void deleteStu(int id);
}

impl

package com.saddam.service.impl;import com.saddam.mapper.StuMapper;
import com.saddam.pojo.Stu;
import com.saddam.service.StuService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;@Service
public class StuServiceImpl implements StuService {@Autowiredpublic StuMapper stuMapper;@Transactional(propagation = Propagation.SUPPORTS)@Overridepublic Stu getStuInfo(int id) {return stuMapper.selectByPrimaryKey(id);}@Transactional(propagation = Propagation.REQUIRED)@Overridepublic void saveStu() {Stu stu = new Stu();stu.setName("jack");stu.setAge(19);stuMapper.insert(stu);}@Transactional(propagation = Propagation.REQUIRED)@Overridepublic void updateStu(int id) {Stu stu = new Stu();stu.setId(id);stu.setName("lucy");stu.setAge(20);stuMapper.updateByPrimaryKey(stu);}@Transactional(propagation = Propagation.REQUIRED)@Overridepublic void deleteStu(int id) {stuMapper.deleteByPrimaryKey(id);}
}

pojo

package com.saddam.pojo;import javax.persistence.Id;public class Stu {@Idprivate Integer id;private String name;private Integer age;/*** @return id*/public Integer getId() {return id;}/*** @param id*/public void setId(Integer id) {this.id = id;}/*** @return name*/public String getName() {return name;}/*** @param name*/public void setName(String name) {this.name = name;}/*** @return age*/public Integer getAge() {return age;}/*** @param age*/public void setAge(Integer age) {this.age = age;}
}

controller

package com.saddam.controller;import com.saddam.service.StuService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;//@Controller
@RestController
public class StuFooController {@Autowiredprivate StuService stuService;/*获取使用GetMapping*/@GetMapping("/getStu")public Object getStu(int id){return stuService.getStuInfo(id);}/*增删改使用PostMapping*/@PostMapping("/saveStu")public Object saveStu(){stuService.saveStu();return "OK";}@PostMapping("/updateStu")public Object updateStu(int id){stuService.updateStu(id);return "OK";}@PostMapping("/deleteStu")public Object deleteStu(int id){stuService.deleteStu(id);return "OK";}
}