Result 结果集封装

Controller

• Result

package com.yang.controller;
​
public class Result {
    private Object data;
    private Integer code;
    private String msg;
​
    public Result() {
    }
​
    public Result(Object data, Integer code) {
        this.data = data;
        this.code = code;
    }
​
    public Result(Object data, Integer code, String msg) {
        this.data = data;
        this.code = code;
        this.msg = msg;
    }
​
    public Object getData() {
        return data;
    }
​
    public void setData(Object data) {
        this.data = data;
    }
​
    public Integer getCode() {
        return code;
    }
​
    public void setCode(Integer code) {
        this.code = code;
    }
​
    public String getMsg() {
        return msg;
    }
​
    public void setMsg(String msg) {
        this.msg = msg;
    }
​
}
​

• Code

package com.yang.controller;
​
public class Code {
    public static final Integer SAVE_OK = 20011;
    public static final Integer UPDATE_OK = 20011;
    public static final Integer DELETE_OK = 20011;
    public static final Integer GET_OK = 20011;
​
​
    public static final Integer SAVE_ERR = 20010;
    public static final Integer UPDATE_ERR = 20010;
    public static final Integer DELETE_ERR = 20010;
    public static final Integer GET_ERR = 20010;
​
​
    public static final Integer SYSTEM_UNKNOWN_ERROR = 50001;
    public static final Integer SYSTEM_TIMEOUT_ERROR = 50002;
​
​
    public static final Integer PROJECT_VALIDATE_ERROR = 60001;
    public static final Integer PROJECT_BUSINESS_ERROR = 60002;
​
​
}
​

• BookController

package com.yang.controller;
​
import com.yang.domain.Book;
import com.yang.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
​
import java.util.List;
​
@RestController
@RequestMapping("/books")
public class BookController {
    @Autowired
    private BookService bookService;
​
    @PostMapping
    public Result save(@RequestBody Book book) {
        boolean flag = bookService.save(book);
        return new Result(flag, flag ? Code.SAVE_OK:Code.SAVE_ERR);
    }
​
    @PutMapping
    public Result update(@RequestBody Book book) {
        boolean flag = bookService.update(book);
        return new Result(flag, flag ? Code.UPDATE_OK:Code.UPDATE_ERR);
​
    }
​
    @DeleteMapping("/{id}")
    public Result delete(@PathVariable Integer id) {
        boolean flag = bookService.delete(id);
        return new Result(flag, flag ? Code.DELETE_OK:Code.DELETE_ERR);
    }
​
    @GetMapping("/{id}")
    public Result select(@PathVariable Integer id) {
        Book book = bookService.select(id);
        Integer code = book !=null ?Code.GET_OK:Code.GET_ERR;
        String msg = book !=null ? "" :"数据查询失败，请重试！";
        return new Result(book,code,msg);
    }
​
    @GetMapping
    public Result selectAll() {
        List<Book> bookList = bookService.selectAll();
        Integer code = bookList !=null ?Code.GET_OK:Code.GET_ERR;
        String msg = bookList !=null ? "" :"数据查询失败，请重试！";
        return new Result(bookList,code,msg);
    }
​
}

• ProjectExceptionAdvice

package com.yang.controller;
​
import com.yang.exception.BusinessException;
import com.yang.exception.SystemException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
​
@RestControllerAdvice
public class ProjectExceptionAdvice {
    @ExceptionHandler(BusinessException.class)
    public Result doBusinessException(BusinessException be ){
        //发送对应的消息给用户
        return new Result(null,be.getCode(),be.getMessage());
​
    }
    @ExceptionHandler(SystemException.class)
    public Result doSystemException(SystemException se ){
        //发送特定消息给用户
        //发送特定消息给运维人员，提醒维护
        //记录日志
        return new Result(null,se.getCode(),se.getMessage());
    }
​
    @ExceptionHandler(Exception.class)
    public Result doException(Exception ex ){
        //发送特定消息给用户
        //发送特定消息给编程人员，提醒维护
        //记录日志
        return new Result(null,Code.SYSTEM_UNKNOWN_ERROR,"系统繁忙，请联系管理员");
​
    }
}