【第11章】spring-mvc默认转换器

news2024/11/24 9:07:13

文章目录

前言
一、DateFormatter
二、NumberFormat
- 1. NumberBean
- 2. number.jsp
三、ConverterController
四、执行结果
总结

前言

【第6章】spring类型转换器

此章节内容为spring类型转换器内容扩展,使用spring提供的注解增强转换器功能,让date和int等类型转换更加方便。

一、DateFormatter

package org.example.springmvc.converters;

import lombok.Getter;
import lombok.Setter;
import lombok.ToString;
import org.springframework.format.annotation.DateTimeFormat;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.Date;

/**
 * Create by zjg on 2024/5/1
 */
@Getter
@Setter
@ToString
public class DateBean {
    private Date date1;
    @DateTimeFormat(pattern = "yyyyMMdd")
    private Date date2;
    @DateTimeFormat(pattern = "yyyy-MM-dd")
    private Date date3;
    @DateTimeFormat(pattern = "yyyy/MM/dd")
    private Date date4;
    @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private Date date5;
    @DateTimeFormat(pattern = "yyyy/MM/dd HH:mm:ss")
    private Date date6;
    @DateTimeFormat(pattern = "yyyy-MM-dd")
    private LocalDate date7;
    @DateTimeFormat(pattern = "HH:mm:ss")
    private LocalTime date8;
    @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private LocalDateTime date9;
}

二、NumberFormat

1. NumberBean

package org.example.springmvc.converters;

import lombok.Getter;
import lombok.Setter;
import lombok.ToString;
import org.springframework.format.annotation.NumberFormat;
import java.math.BigDecimal;
import java.math.BigInteger;

/**
 * Create by zjg on 2024/5/1
 */
@Getter
@Setter
@ToString
public class NumberBean {
    @NumberFormat
    private short number1;
    @NumberFormat
    private int number2;
    @NumberFormat
    private long number3;
    @NumberFormat(style= NumberFormat.Style.NUMBER)
    private float number4;
    @NumberFormat(style= NumberFormat.Style.PERCENT)
    private double number5;
    @NumberFormat(style= NumberFormat.Style.CURRENCY)
    private BigDecimal number6;
    @NumberFormat(pattern = "#,###,###,###,###")
    private BigInteger number7;
}

2. number.jsp

<%--
  Created by IntelliJ IDEA.
  User: 张军国001
  Date: 2024/5/2
  Time: 12:06
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="spring" uri="http://www.springframework.org/tags" %>
<html>
<head>
    <title>numberBean</title>
</head>
<body>
<spring:eval expression="numberBean.number1"/>
<spring:eval expression="numberBean.number2"/>
<spring:eval expression="numberBean.number3"/>
<spring:eval expression="numberBean.number4"/>
<spring:eval expression="numberBean.number5"/>
<spring:eval expression="numberBean.number6"/>
<spring:eval expression="numberBean.number7"/>
</body>
</html>

三、ConverterController

package org.example.springmvc.converters;

import com.alibaba.fastjson2.JSONObject;
import org.example.springmvc.converters.custom.Request;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * Create by zjg on 2024/5/1
 */
@Controller
public class ConverterController {
    @RequestMapping("/dateBean")
    @ResponseBody
    public DateBean dateBean(DateBean dateBean){
        System.out.println(dateBean);
        return dateBean;
    }
    @RequestMapping("/numberBean")
    public String numberBean(NumberBean numberBean){
        System.out.println(numberBean);
        return "params/number";
    }
}

四、执行结果

DateBean(date1=Wed May 01 22:28:20 CST 2024, date2=Wed May 01 00:00:00 CST 2024, date3=Wed May 01 00:00:00 CST 2024, date4=Wed May 01 00:00:00 CST 2024, date5=Wed May 01 22:28:20 CST 2024, date6=Wed May 01 22:28:20 CST 2024, date7=2024-05-01, date8=22:28:20, date9=2024-05-01T22:28:20)
NumberBean(number1=1, number2=1, number3=1, number4=1.123, number5=1.456, number6=1.78, number7=1000000000000)