Exception（异常处理）

package com.wgc.jsonp.controller;

import com.wgc.jsonp.entity.TestUser;
import com.wgc.jsonp.exception.DBException;
import com.wgc.jsonp.exception.DataVlidateException;
import com.wgc.jsonp.service.TestUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class TestUserController {
    
    @Autowired
    private TestUserService service;

    @RequestMapping("/add")
    @ResponseBody /*去掉这个注解就是返回页面*/
    public String add(TestUser testUser) {
        try {
            service.addUser(testUser);
        } catch (DBException e) {
            return "返回到指定的页面";
        } catch (DataVlidateException e) {
           return "返回到原本添加的页面";
        } catch (Exception e) {
            return "未知的异常，返回到指定的页面";
        }
        return "返回到添加成功后的页面";
    }
}