SpringBootRestFul快速入门

    /**
     * ajax操作：保存客户信息
     * @param customer
     */
    @PostMapping("/saveCustomer")
    public ResponseEntity saveCustomer(Customer customer){
        //1、获取表单信息(参数)
        //2、调用service保存信息
        try {
            customerServiceImpl.saveCustomer(customer);
        } catch (Exception e) {
            //保存失败
//            return new Msg(e.getMessage(),false);
//            return new ResponseEntity(HttpStatus.INTERNAL_SERVER_ERROR);//只能抛出500状态码
            return ResponseEntity.ok(new Msg(e.getMessage(),false));
        }
        //保存成功
        //3、获取service结果，写出响应体
        return ResponseEntity.ok(new Msg("保存成功",true));
    }

    /**
     * ajax修改客户信息
     * @return
     */
    @PutMapping("/modifyCustomer")
    public ResponseEntity modifyCustomer(Customer customer){
        //1、调用service进行修改
        try {
            customerServiceImpl.modifyCustomer(customer);
            //2、根据service处理结果，将结果写出响应体
        } catch (Exception e) {
            //若出现异常，修改失败，将异常信息写出响应体即可
            return ResponseEntity.ok(new Msg(e.getMessage(),false));
        }
        //若未出异常，修改成功
        return ResponseEntity.ok(new Msg("修改成功",true));
    }

  /**
     * ajax删除客户信息
     * @return
     */
    @DeleteMapping("/deleteCustomerByCustId/{cust_id}")
    public ResponseEntity deleteCustomerByCustId(@PathVariable("cust_id")Long cust_id){
        //1、调用service进行删除
        //2、根据删除结果，进行响应体写出
        try {
            customerServiceImpl.deleteCustomerByCustId(cust_id);
        } catch (Exception e) {
            return ResponseEntity.ok(new Msg(e.getMessage(),false));
        }
        return ResponseEntity.ok(new Msg("删除成功",true));
    }

//1、页面加载完成时，为保存按钮绑定点击事件
			$("#saveBtn").click(function () {
				//2、点击事件中，发送ajax请求到控制器，提交整个表单数据
				$.ajax({
					type:"post",
					url:"${pageContext.request.contextPath}/customer/saveCustomer",
					data:$("#f1").serialize(),
					contentType:"application/x-www-form-urlencoded",
					dataType:"json",
					statusCode:{
						200:function (data) {
							alert(data.msg);
						},
						500:function () {
							alert("服务器异常，请联系管理员!");
						}
					}
				});
			});

//2、页面加载完成时，为修改按钮绑定点击事件，点击按钮，ajax方式提交表单
			$("#modifyBtn").click(function () {
				$.ajax({
					type:"put",
					url:"${pageContext.request.contextPath}/customer/modifyCustomer",
					data:$("#f1").serialize(),
					contentType:"application/x-www-form-urlencoded",
					dataType:"json",
					statusCode:{
						200:function (data) {
							//1、判断修改结果成功与否
							//2、根据修改结果，进行分别处理
							alert(data.msg);
							if(data.flag){
								//修改成功，跳转到 查询所有的功能
								kk="${pageContext.request.contextPath}/customer/clist";
							}
						},
						500:function () {
							alert("服务器异常，请联系管理员！");
						}
					}
				});
			});

	//删除某个客户信息
	function deleteCustomerByCustId(cust_id) {
		//加入是否删除判断
		if(confirm("是否删除该客户信息？")){
			//通过ajax，向控制器发送请求，请求删除该客户信息
			$.ajax({
				type:"delete",
				url:"${pageContext.request.contextPath}/customer/deleteCustomerByCustId/"+cust_id,
				dataType:"json",
				statusCode:{
					200:function (data) {
						//1、展示字符串结果
						alert(data.msg);
						//2、若删除成功，刷新整体页面
						if(data.flag){
							kk="${pageContext.request.contextPath}/customer/clist";
						}
					},
					500:function () {
						alert("服务器异常，请联系管理员!");
					}
				}
			});
		}
	}