Spring Boot修改添加界面二合一

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/qq78442761/article/details/88545968

目录

 

 

理论

演示

代码

---

 

理论

这里要注意几点：

          1. SpringMVC中配置HiddenHttpMethodFilter;（SpringBoot自动配置好的）;

          2. 页面创建一个post表单

          3. 创建一个input项，name="_method";值就是指定的请求方式

这里可以使用三目运算，判断，关键代码如下：

type为hidden的状态；

因为在修改的时候，会把people传给页面，但发现people有值的时候，就说明是修改界面，

但people没有值的时候，说明是添加界面！

同理，其他的用户属性也有三元判断！

演示

程序运行截图如下：

添加添加人员后，添加好数据：

点击添加：

点击锅盖的修改（把名字修改为锅盖呵呵）：

点击修改后：

代码

程序结构如下：

源码如下：

MyMvcConfig.java

package addandeditdemo.demo.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

@Configuration
public class MyMvcConfig {

    @Bean
    public WebMvcConfigurerAdapter webMvcConfigurerAdapter(){

        WebMvcConfigurerAdapter adapter = new WebMvcConfigurerAdapter() {
            @Override
            public void addViewControllers(ViewControllerRegistry registry) {

                registry.addViewController("/").setViewName("index");
                registry.addViewController("index.html").setViewName("index");
            }
        };

        return adapter;
    }
}

PeopleController.java

package addandeditdemo.demo.controller;

import addandeditdemo.demo.data.PeopleData;
import addandeditdemo.demo.entities.People;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;

import java.util.Collection;

@Controller
public class PeopleController {

    @Autowired
    PeopleData peopleData;

    @GetMapping({"/index", "/"})
    public String list(Model model){

        Collection<People> peoples = peopleData.getAll();
        model.addAttribute("index", peoples);
        return "index";
    }

    @GetMapping("/add")
    public String toAddPage(){

        return "add";
    }

    @PostMapping("/add")
    public String addPeople(People people){

        System.out.println(people);
        peopleData.save(people);
        return "redirect:/";
    }

    //修改页面
    @GetMapping("/edit/{id}")
    public String toEditPage(@PathVariable("id") Integer id, Model model){

        People people = peopleData.get(id);
        model.addAttribute("people", people);
        return "/add";
    }

    //修改
    @PutMapping("/add")
    public String updatePeople(People people){

        System.out.println(people);
        peopleData.save(people);
        return "redirect:/";
    }
}

PeopleData.java

package addandeditdemo.demo.data;

import addandeditdemo.demo.entities.People;
import org.springframework.stereotype.Repository;

import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

@Repository
public class PeopleData {

    private static Map<Integer, People> peoples = null;

    static{

        peoples = new HashMap<Integer, People>();

        peoples.put(1001, new People(1001, "妹爷", "[email protected]", 1, new Date()));
        peoples.put(1002, new People(1002, "球球", "[email protected]", 0, new Date()));
        peoples.put(1003, new People(1003, "猪小明", "[email protected]", 1, new Date()));
        peoples.put(1004, new People(1004, "米线", "[email protected]", 0, new Date()));
        peoples.put(1005, new People(1005, "腿腿", "[email protected]", 0, new Date()));
        peoples.put(1006, new People(1006, "闰土", "[email protected]", 1, new Date()));
    }

    private static Integer initId = 1007;

    public void save(People people){

        if(people.getId() == null){

            people.setId(initId++);
        }

        peoples.put(people.getId(), people);
    }

    public Collection<People> getAll(){

        return peoples.values();
    }

    public People get(Integer id){

        return peoples.get(id);
    }
}

People.java

package addandeditdemo.demo.entities;

import java.util.Date;

public class People {

    private Integer id;
    private String name;
    private String email;
    private Integer gender;
    private Date birth;

    public People(Integer id, String name, String email, Integer gender, Date birth) {

        this.id = id;
        this.name = name;
        this.email = email;
        this.gender = gender;
        this.birth = birth;
    }

    public  People(){

    }

    @Override
    public String toString() {
        return "People{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", email='" + email + '\'' +
                ", gender=" + gender +
                ", birth=" + birth +
                '}';
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public Integer getGender() {
        return gender;
    }

    public void setGender(Integer gender) {
        this.gender = gender;
    }

    public Date getBirth() {
        return birth;
    }

    public void setBirth(Date birth) {
        this.birth = birth;
    }
}

add.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link href="#" th:href="@{/webjars/bootstrap/4.0.0/css/bootstrap.css}" rel="stylesheet">
</head>
<body>

<form th:action="@{/add}" method="post">
    <input type="hidden" name="_method" value="put" th:if="${people!=null}"/>
    <input type="hidden" name="id" th:if="${people!=null}" th:value="${people.id}">
    <div class="form-group">
        <label>姓名</label>
        <input name="name" type="text" class="form-control" placeholder="IT1995"
               th:value="${people!=null}?${people.name}">
    </div>
    <div class="form-group">
        <label>邮箱</label>
        <input name="email" type="email" class="form-control" placeholder="[email protected]"
               th:value="${people!=null}?${people.email}">
    </div>
    <div class="form-group">
        <label>性别</label><br/>
        <div class="form-check form-check-inline">
            <input class="form-check-input" type="radio" name="gender" value="1"
                   th:checked="${people!=null}?${people.gender==1}">
            <label class="form-check-label">男</label>
        </div>
        <div class="form-check form-check-inline">
            <input class="form-check-input" type="radio" name="gender" value="0"
                   th:checked="${people!=null}?${people.gender==0}">
            <label class="form-check-label">女</label>
        </div>
    </div>
    <div class="form-group">
        <label>生日</label>
        <input name="birth" type="text" class="form-control" placeholder="2019/3/12"
               th:value="${people!=null}?${#dates.format(people.birth, 'yyyy-MM-dd HH:mm')}">
    </div>
    <button type="submit" class="btn btn-primary" th:text="${people!=null}?'修改':'添加'">添加</button>
</form>

</body>
</html>

index.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>呵呵</title>
    <link href="#" th:href="@{/webjars/bootstrap/4.0.0/css/bootstrap.css}" rel="stylesheet">
</head>
<body>

<div class="table-responsive">
    <table class="table table-striped table-sm">
        <thead>
        <tr>
            <th>编号</th>
            <th>姓名</th>
            <th>邮箱</th>
            <th>性别</th>
            <th>生日</th>
            <th>操作</th>
        </tr>
        </thead>
        <tbody>
        <tr th:each="people:${index}">
            <td th:text="${people.id}"></td>
            <td>[[${people.name}]]</td>
            <td th:text="${people.email}"></td>
            <td th:text="${people.gender} == 1 ? '男' : '女'"></td>
            <td th:text="${#dates.format(people.birth, 'yyy-MMM-ddd HH:mm')}"></td>
            <td>
                <a class="btn btn-sm btn-primary" href="#" th:href="@{/edit/} + ${people.id}">编辑</a>
            </td>
        </tr>
        </tbody>
    </table>
    <a class="btn btn-sm btn-success" href="#" th:href="@{/add}">添加人员</a>
</div>

</body>
</html>

application.properties

spring.thymeleaf.cache=false
spring.mvc.date-format=yyyy-MM-dd

pron.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.19.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.loginWebDemo</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>loginWeb</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <thymeleaf.version>3.0.9.RELEASE</thymeleaf.version>
        <thymeleaf-layout-dialect.version>2.2.2</thymeleaf-layout-dialect.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

        <!--引入jquery-webjar-->
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>jquery</artifactId>
            <version>3.3.1</version>
        </dependency>

        <!--引入bootstrap-->
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>bootstrap</artifactId>
            <version>4.0.0</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>