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Springboot主流的 ----------------------- 简略写法

package com.dx.wlmq.controller;import com.dx.wlmq.domain.Address;
import com.dx.wlmq.service.AddresssService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;@RestController                // 相当于 @Controller+@ResponseBody
@CrossOrigin(origins = "*")    // 取消跨域
@RequestMapping("/address") // 访问路径
public class AddresssController {@Autowired  // 自动装配AddresssService addresssService;/*** 查询方法* *///相当于 @RequestMapping(value = "/list", method = RequestMethod.GET,produces = "text/html;charset=UTF-8" )@GetMapping(value = "/list")public Object index11() {return addresssService.Addresslist();}//    @RequestMapping(value = "/add", method = RequestMethod.POST, produces = "text/html;charset=UTF-8")@PostMapping("/add")public Object index12(@RequestBody Address address) {return addresssService.Addressadd(address);}//    @RequestMapping(value = "/delete", method = RequestMethod.POST, produces = "text/html;charset=UTF-8")@DeleteMapping("/delete")public Object index13(Integer id) {return addresssService.Addressdelete(id);}//    @RequestMapping(value = "/update", method = RequestMethod.POST, produces = "text/html;charset=UTF-8")@PutMapping(value = "/update")public Object index14(@RequestBody Address address) {return addresssService.Addressupdate(address);}}

原Mybits主流写法（案例）

package com.dx.wlmq.controller;import com.alibaba.fastjson.JSON;
import com.dx.wlmq.domain.Role;
import com.dx.wlmq.service.RolesService;
import org.springframework.stereotype.Controller;
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 javax.annotation.Resource;
import javax.servlet.http.HttpServletResponse;@Controller
@RequestMapping("/roles")
public class RolesController {@Resource(name = "rolesService")RolesService rolesService;@RequestMapping(value = "/list", method = RequestMethod.GET, produces = "text/html;charset=UTF-8")@ResponseBodypublic Object index11(HttpServletResponse response) {response.setContentType("text/html;charset=UTF-8");return JSON.toJSONString(rolesService.Rolelist());}@RequestMapping(value = "/add", method = RequestMethod.POST, produces = "text/html;charset=UTF-8")@ResponseBodypublic Object index12(HttpServletResponse response,@RequestBody Role role) {response.setContentType("text/html;charset=UTF-8");return JSON.toJSONString(rolesService.Roleadd(role));}@RequestMapping(value = "/delete", method = RequestMethod.POST, produces = "text/html;charset=UTF-8")@ResponseBodypublic Object index13(HttpServletResponse response, Integer id) {response.setContentType("text/html;charset=UTF-8");return JSON.toJSONString(rolesService.Roledelete(id));}@RequestMapping(value = "/update", method = RequestMethod.POST, produces = "text/html;charset=UTF-8")@ResponseBodypublic Object index14(HttpServletResponse response,@RequestBody Role role) {response.setContentType("text/html;charset=UTF-8");return JSON.toJSONString(rolesService.Roleupdate(role));}}

Springboot主流的 ----------------------- 简略写法(优点：写法更简略，更直接)

简单写法的笔记：

《《《《《《《《《------   springboot@注释解析最简写法    ------》》》》》》》》》

在控制层开头：

书写@RestController                // 相当于 @Controller+@ResponseBody
添加取消跨域注释 @CrossOrigin(origins = "*")

书写类，然后在第一行添加 @Autowired  //作用是自动装配 ，装配了业务层的调用实例   
    private SysEmpService sysEmpService;

然后增删改查都有不同的Mapping注释，当这样写注解的时候，return的值直接为JSON格式，详细如下：
    /**
     * 查询方法注解写法
     * */
    @GetMapping(value = "/list")    //相当于 @RequestMapping(value = "/list", method = RequestMethod.GET,produces = "text/html;charset=UTF-8" )
    public Object index11() {
        return addresssService.Addresslist();
    }

     /**
     * 增加方法注解写法
     * */
    @PostMapping("/add")           // 相当于   @RequestMapping(value = "/add", method = RequestMethod.POST, produces = "text/html;charset=UTF-8")
    public Object index12(@RequestBody Address address) {
        return addresssService.Addressadd(address);
    }

    /**
     * 删除方法注解写法
     * */
    @DeleteMapping("/delete")   //相当于    @RequestMapping(value = "/delete", method = RequestMethod.POST, produces = "text/html;charset=UTF-8")
    public Object index13(Integer id) {
        return addresssService.Addressdelete(id);
    }

    /**
     * 修改方法注解写法
     * */
    @PutMapping(value = "/update")   //相当于 @RequestMapping(value="/update", method=RequestMethod.POST, produces = "text/html;charset=UTF-8")
    public Object index14(@RequestBody Address address) {
        return addresssService.Addressupdate(address);
    }

在服务层，将调用Dao层的时用装配注入的注解@Autowired，但服务层实现类里的@Service("rolesService")不能省略

在Dao层的mapper里面添加注解：@Mapper