06 SpringBoot RESTful风格的增删改查 CRUD
06 SpringBoot RESTful风格的增删改查 CRUD
专栏列表
- Spring Boot 入门及环境构建
- Spring Boot 配置
- Spring Boot 自动配置及原理分析
- Spring Boot 日志
- SpringBoot Web 开发、Thymeleaf 模版 Spring MVC
- SpringBoot RESTful风格的增删改查 CRUD
文章目录
- 06 SpringBoot RESTful风格的增删改查 CRUD
-
- 专栏列表
- 默认访问首页
- i18n国际化
- 点击连接切换语言
- 实现登录功能
- 修改页面立即生效
- 拦截器进行登陆检查
- CRUD-员工列表
- thymeleaf公共页面元素抽取
-
- 语法
- 后台页面抽取
- 引入片段传递参数
- 员工添加
- 日期格式修改
- 员工修改
- 员工删除
静态资源文件 - PathA
静态资源文件 - PathB
[Demo from GitHub](https://github.com/kevinkda/MarkdownRepository/tree/master/Develop Demo/Java Framework/Spring/SpringBoot/spring-boot-restful-crud-01)
- 将静态资源(css,img,js)添加到项目中，放到 SpringBoot 默认的静态资源文件夹下
- 将模板文件(html)放到 template文件夹下
如果你的静态资源明明放到了静态资源文件夹下却无法访问，请检查一下是不是在自定义的配置类上加了**@EnableWebMvc注解**
默认访问首页
template文件加不是静态资源文件夹，默认是无法直接访问的，所以要添加视图映射
package com.kevinkda.test.spring.boot.springbootrestfulcrud01.config;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
/**
* @author Kevin KDA on 2020/6/28 16:49
* @version 1.0.0
* @project maven-test-01
* @package com.kevinkda.test.spring.boot.springbootrestfulcrud01.config
* @classname MyMvcConfig
* @apiNote
* @since 1.0.0
*/
@Configuration
public class MyMvcConfig implements WebMvcConfigurer {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("login");
registry.addViewController("/index").setViewName("login");
registry.addViewController("/index.html").setViewName("login");
}
// 所有的 WebMvcConfigurerAdapter 组件都会一起起作用
// 将组件注册在容器
@Bean
public WebMvcConfigurerAdapter webMvcConfigurerAdapter() {
WebMvcConfigurerAdapter adapter = new WebMvcConfigurerAdapter() {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
// super.addViewControllers(registry);
registry.addViewController("/").setViewName("login");
registry.addViewController("/login.html").setViewName("index");
}
};
return adapter;
}
}
访问：http://localhost:8080/
i18n国际化
-
编写国际化配置文件，抽取页面需要显示的国际化消息
创建i18n文件夹存放配置文件，文件名格式为
基础名(login)+语言代码(zh)+国家代码(CN)
-
SpringBoot自动配置好了管理国际化资源文件的组件
@Configuration(proxyBeanMethods = false) @ConditionalOnMissingBean(name = AbstractApplicationContext.MESSAGE_SOURCE_BEAN_NAME, search = SearchStrategy.CURRENT) @AutoConfigureOrder(Ordered.HIGHEST_PRECEDENCE) @Conditional(ResourceBundleCondition.class) @EnableConfigurationProperties public class MessageSourceAutoConfiguration { private static final Resource[] NO_RESOURCES = {}; public MessageSourceAutoConfiguration() { } // 我们的配置文件可以直接放在类路径下叫 messages.properties private String basename = "messages"; @Bean @ConfigurationProperties(prefix = "spring.messages") public MessageSourceProperties messageSourceProperties() { return new MessageSourceProperties(); } @Bean public MessageSource messageSource(MessageSourceProperties properties) { ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource(); if (StringUtils.hasText(properties.getBasename())) { // 设置国际化资源文件的基础名（去掉语言国家代码的） messageSource.setBasenames(StringUtils .commaDelimitedListToStringArray(StringUtils.trimAllWhitespace(properties.getBasename()))); } if (properties.getEncoding() != null) { messageSource.setDefaultEncoding(properties.getEncoding().name()); } messageSource.setFallbackToSystemLocale(properties.isFallbackToSystemLocale()); Duration cacheDuration = properties.getCacheDuration(); if (cacheDuration != null) { messageSource.setCacheMillis(cacheDuration.toMillis()); } messageSource.setAlwaysUseMessageFormat(properties.isAlwaysUseMessageFormat()); messageSource.setUseCodeAsDefaultMessage(properties.isUseCodeAsDefaultMessage()); return messageSource; } } -
使用
ResourceBundleMessageSource在配置文件中添加国际化文件的位置和基础名spring.messages.basename=i18n.login如果配置文件中没有配置基础名，就在类路径下找基础名为
message的配置文件 -
将页面文字改为获取国际化配置，格式
#{key}，在页面使用fmt:message取出国际化内容<html lang="en" xmlns:th="http://www.thymeleaf.org"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <meta name="description" content=""> <meta name="author" content=""> <title>Signin Template for Bootstraptitle> <link href="asserts/css/bootstrap.min.css" th:href="@{/webjars/bootstrap/4.0.0/css/bootstrap.css}" rel="stylesheet"> <link href="asserts/css/signin.css" th:href="@{/asserts/css/signin.css}" rel="stylesheet"> head> <body class="text-center"> <form class="form-signin" action="dashboard.html"> <img class="mb-4" src="asserts/img/bootstrap-solid.svg" th:src="@{/asserts/img/bootstrap-solid.svg}" alt="" width="72" height="72"> <h1 class="h3 mb-3 font-weight-normal" th:text="#{login.tip}">Please sign inh1> <label class="sr-only" th:text="#{login.username}">Usernamelabel> <input type="text" class="form-control" placeholder="Username" th:placeholder="#{login.username}" required="" autofocus=""> <label class="sr-only" th:text="#{login.password}">Passwordlabel> <input type="password" class="form-control" placeholder="Password" th:placeholder="#{login.password}" required=""> <div class="checkbox mb-3"> <label> <input type="checkbox" value="remember-me" > [[#{login.remember}]] label> div> <button class="btn btn-lg btn-primary btn-block" type="submit" th:text="#{login.btn}">Sign inbutton> <p class="mt-5 mb-3 text-muted">© 2017-2018p> <a class="btn btn-sm">中文a> <a class="btn btn-sm">Englisha> form> body> html> -
然后就可以更改浏览器语言，页面就会使用对应的国际化配置文件
-
原理
国际化Locale（区域信息对象）；
LocaleResolver（获取区域信息对象的组件）；
在springmvc配置类
WebMvcAutoConfiguration中注册了该组件@Bean /** *前提是容器中不存在这个组件， *所以使用自己的对象就要配置@Bean让这个条件不成立（实现LocaleResolver 即可） */ @ConditionalOnMissingBean /** * 如果在application.properties中有配置国际化就用配置文件的 * 没有配置就用AcceptHeaderLocaleResolver 默认request中获取 */ @ConditionalOnProperty( prefix = "spring.mvc", name = {"locale"} ) public LocaleResolver localeResolver() { if (this.mvcProperties.getLocaleResolver() == org.springframework.boot.autoconfigure.web.servlet.WebMvcProperties.LocaleResolver.FIXED) { return new FixedLocaleResolver(this.mvcProperties.getLocale()); } else { AcceptHeaderLocaleResolver localeResolver = new AcceptHeaderLocaleResolver(); localeResolver.setDefaultLocale(this.mvcProperties.getLocale()); return localeResolver; } }点击链接切换国际化
package com.kevinkda.test.spring.boot.springbootrestfulcrud01; import org.springframework.util.StringUtils; import org.springframework.web.servlet.LocaleResolver; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.util.Locale; /** * 可以在连接上携帯区域信息 * * @author Kevin KDA on 2020/6/28 22:04 * @version 1.0.0 * @project maven-test-01 * @package com.kevinkda.test.spring.boot.springbootrestfulcrud01 * @classname MyLocaleResolver * @apiNote * @since 1.0.0 */ public class MyLocaleResolver implements LocaleResolver { @Override public Locale resolveLocale(HttpServletRequest httpServletRequest) { //获取请求参数中的语言 String language = httpServletRequest.getParameter("l"); //没带区域信息参数就用系统默认的 Locale locale = Locale.getDefault(); if (!StringUtils.isEmpty(language)) { //提交的参数是zh_CN （语言代码_国家代码） String[] split = language.split("_"); locale = new Locale(split[0], split[1]); } return locale; } @Override public void setLocale(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Locale locale) { } }@Configuration public class MyMvcConfig extends WebMvcConfigurerAdapter { @Bean public LocaleResolver localeResolver() { return new MyLocaleResolver(); } }默认的就是根据请求头带来的区域信息获取Locale进行国际化
public Locale resolveLocale(HttpServletRequest request) { Locale defaultLocale = this.getDefaultLocale(); if (defaultLocale != null && request.getHeader("Accept-Language") == null) { return defaultLocale; } else { Locale requestLocale = request.getLocale(); List<Locale> supportedLocales = this.getSupportedLocales(); if (!supportedLocales.isEmpty() && !supportedLocales.contains(requestLocale)) { Locale supportedLocale = this.findSupportedLocale(request, supportedLocales); if (supportedLocale != null) { return supportedLocale; } else { return defaultLocale != null ? defaultLocale : requestLocale; } } else { return requestLocale; } } }
点击连接切换语言
-
实现点击连接切换语言，而不是更改浏览器
-
修改页面，点击连接携带语言参数
<a class="btn btn-sm" href="?l=zh_CN">中文a> <a class="btn btn-sm" href="?l=en_US">Englisha> -
自己实现区域信息解析器
public class MyLocaleResolver implements LocaleResolver { @Override public Locale resolveLocale(HttpServletRequest httpServletRequest) { //获取请求参数中的语言 String language = httpServletRequest.getParameter("l"); //没带区域信息参数就用系统默认的 Locale locale = Locale.getDefault(); if (!StringUtils.isEmpty(language)) { //提交的参数是zh_CN （语言代码_国家代码） String[] split = language.split("_"); locale = new Locale(split[0], split[1]); } return locale; } @Override public void setLocale(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Locale locale) { } } -
在配置类中将其注册到容器中
@Configuration public class MyMvcConfig implements WebMvcConfigurer { @Override public void addViewControllers(ViewControllerRegistry registry) { registry.addViewController("/").setViewName("login"); registry.addViewController("/index").setViewName("login"); registry.addViewController("/index.html").setViewName("login"); } @Bean public LocaleResolver localeResolver() { return new MyLocaleResolver(); } }
-
如果没有生效，请检查@Bean的那个方法的名称是否为localeResolver
实现登录功能
-
提供登录的controller
@Controller public class UserController { @PostMapping("/user/login") public String login(@RequestParam String username, @RequestParam String password, HttpSession session, Model model) { if (!StringUtils.isEmpty(username) && "123456".equals(password)) { //登录成功，把用户信息方法哦session中，防止表单重复提交，重定向到后台页面 session.setAttribute("loginUser", username); return "redirect:/main.html"; } //登录失败,返回到登录页面 model.addAttribute("msg", "用户名或密码错误！"); return "login"; } } -
修改表单提交地址，输入框添加name值与参数名称对应
<form class="form-signin" action="dashboard.html" th:action="@{/user/login}" method="post"> <img class="mb-4" src="asserts/img/bootstrap-solid.svg" alt="" width="72" height="72"> <h1 class="h3 mb-3 font-weight-normal" th:text="#{login.tip}">Please sign inh1> <label class="sr-only">Usernamelabel> <input type="text" name="username" class="form-control" th:placeholder="#{login.username}" placeholder="Username" autofocus=""> <label class="sr-only">Passwordlabel> <input type="password" name="password" class="form-control" th:placeholder="#{login.password}" placeholder="Password" required=""> <div class="checkbox mb-3"> <label> <input type="checkbox" value="remember-me"> [[#{login.remember}]] label> div> <button class="btn btn-lg btn-primary btn-block" type="submit" th:text="#{login.btn}">Sign inbutton> <p class="mt-5 mb-3 text-muted">© 2017-2018p> <a class="btn btn-sm" href="?l=zh_CN">中文a> <a class="btn btn-sm" href="?l=en_US">Englisha> form> -
由于登录失败是转发，所以页面的静态资源请求路径会不正确，使用模板引擎语法替换
<link href="asserts/css/bootstrap.min.css" th:href="@{/asserts/css/bootstrap.min.css}" rel="stylesheet"> <link href="asserts/css/signin.css" th:href="@{/asserts/css/signin.css}" rel="stylesheet"> -
添加登录失败页面显示
<h1 class="h3 mb-3 font-weight-normal" th:text="#{login.tip}">Please sign inh1> <p th:text="${msg}" th:if="${not #strings.isEmpty(msg)}" style="color: red">p>
修改页面立即生效
开发期间模板引擎页面修改以后，要实时生效
-
禁用模板引擎的缓存
# 禁用缓存 spring.thymeleaf.cache=falsespring: # 禁用缓存 thymeleaf: cache: false -
在页面修改完成以后按快捷键
ctrl+f9，重新编译；
拦截器进行登陆检查
-
实现拦截器
package cn.clboy.hellospringbootweb.interceptor; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class LoginHandlerInterceptor implements HandlerInterceptor { @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { Object loginUser = request.getSession().getAttribute("loginUser"); if (loginUser == null) { //未登录，拦截，并转发到登录页面 request.setAttribute("msg", "您还没有登录，请先登录！"); request.getRequestDispatcher("/index").forward(request, response); return false; } return true; } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { } } -
注册拦截器
package cn.clboy.hellospringbootweb.config; import cn.clboy.hellospringbootweb.interceptor.LoginHandlerInterceptor; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.LocaleResolver; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.ViewControllerRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurer; @Configuration public class MyMvcConfig implements WebMvcConfigurer { //定义不拦截路径 private static final String[] excludePaths = {"/", "/index", "/index.html", "/user/login", "/asserts/**"}; @Override public void addViewControllers(ViewControllerRegistry registry) { registry.addViewController("/").setViewName("login"); registry.addViewController("/index").setViewName("login"); registry.addViewController("/index.html").setViewName("login"); registry.addViewController("/main.html").setViewName("dashboard"); } @Bean public LocaleResolver localeResolver() { return new MyLocaleResolver(); } @Override public void addInterceptors(InterceptorRegistry registry) { //添加不拦截的路径，SpringBoot已经做好了静态资源映射，所以我们不用管 registry.addInterceptor(new LoginHandlerInterceptor()) .excludePathPatterns(excludePaths); } }在spring2.0+的版本中，只要用户自定义了拦截器，则静态资源会被拦截。但是在spring1.0+的版本中，是不会拦截静态资源的。
因此，在使用spring2.0+时，配置拦截器之后，我们要把静态资源的路径加入到不拦截的路径之中。
CRUD-员工列表
使用rest风格
| 实验功能 | 请求URI | 请求方式 |
|---|---|---|
| 查询所有员工 | emps | GET |
| 查询某个员工(来到修改页面) | emp/1 | GET |
| 来到添加页面 | emp | GET |
| 添加员工 | emp | POST |
| 来到修改页面（查出员工进行信息回显） | emp/1 | GET |
| 修改员工 | emp | PUT |
| 删除员工 | emp/1 | DELETE |
-
为了页面结构清晰，在template文件夹下新建emp文件夹，将list.html移动到emp文件夹下
-
将dao层和实体层java代码复制到项目中
dao，entities -
添加员工controller，实现查询员工列表的方法
@Controller public class EmpController { @Autowired private EmployeeDao employeeDao; @GetMapping("/emps") public String emps(Model model) { Collection<Employee> empList = employeeDao.getAll(); model.addAttribute("emps", empList); return "emp/list"; } } -
修改后台页面，更改左侧侧边栏，将
customer改为员工列表，并修改请求路径<li class="nav-item"> <a class="nav-link" th:href="@{/emps}"> <svg .....> ...... svg> 员工列表 a> li> -
同样emp/list页面的左边侧边栏是和后台页面一模一样的，每个都要修改很麻烦，接下来，抽取公共片段
thymeleaf公共页面元素抽取
语法
~{templatename::selector}：模板名::选择器
~{templatename::fragmentname}:模板名::片段名
/*公共代码片段*/
<footer th:fragment="copy">
© 2011 The Good Thymes Virtual Grocery
footer>
/*引用代码片段*/
<div th:insert="~{footer :: copy}"><div th:insert="footer :: copy">div>
具体参考官方文档：https://www.thymeleaf.org/doc/tutorials/3.0/usingthymeleaf.html#including-template-fragments
三种引入公共片段的th属性：
th:insert：将公共片段整个插入到声明引入的元素中th:replace：将声明引入的元素替换为公共片段th:include：将被引入的片段的内容包含进这个标签中
/*公共片段*/
<footer th:fragment="copy">
© 2011 The Good Thymes Virtual Grocery
footer>
/*引入方式*/
<div th:insert="footer :: copy">div>
<div th:replace="footer :: copy">div>
<div th:include="footer :: copy">div>
/*效果*/
<div>
<footer>
© 2011 The Good Thymes Virtual Grocery
footer>
div>
<footer>
© 2011 The Good Thymes Virtual Grocery
footer>
<div>
© 2011 The Good Thymes Virtual Grocery
div>
后台页面抽取
-
将后台主页中的顶部导航栏作为片段，在list页面引入
dashboard.html：
<nav th:fragment="topbar" class="navbar navbar-dark sticky-top bg-dark flex-md-nowrap p-0"> <a class="navbar-brand col-sm-3 col-md-2 mr-0" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">Company namea> <input class="form-control form-control-dark w-100" type="text" placeholder="Search" aria-label="Search"> <ul class="navbar-nav px-3"> <li class="nav-item text-nowrap"> <a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">Sign outa> li> ul> nav>list.html：
<body> <div th:replace="dashboard::topbar">div> ...... -
使用选择器的方式 抽取左侧边栏代码
dashboard.html：
<div class="container-fluid"> <div class="row">list.html：
<div class="container-fluid"> <div class="row"> <div th:replace="dashboard::#sidebar">div> ......
引入片段传递参数
实现点击当前项高亮
将dashboard.html中的公共代码块抽出为单独的html文件，放到commos文件夹下
在引入代码片段的时候可以传递参数，然后在sidebar代码片段模板中判断当前点击的链接
语法：
~{templatename::selector(变量名=值)}
/*或者在定义代码片段时，定义参数*/
topbar.html
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<body>
<nav th:fragment="topbar" class="navbar navbar-dark sticky-top bg-dark flex-md-nowrap p-0">
<a class="navbar-brand col-sm-3 col-md-2 mr-0" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">Company
namea>
<input class="form-control form-control-dark w-100" type="text" placeholder="Search" aria-label="Search">
<ul class="navbar-nav px-3">
<li class="nav-item text-nowrap">
<a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">Sign outa>
li>
ul>
nav>
body>
html>
sidebar.html
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Titletitle>
head>
<body>
<nav id="sidebar" class="col-md-2 d-none d-md-block bg-light sidebar">
<div class="sidebar-sticky">
<ul class="nav flex-column">
<li class="nav-item">
<a class="nav-link active" th:class="${currentURI}=='main.html'?'nav-link active':'nav-link'" th:href="@{/main.html}">
.....
body>
html>
然后在dashboard.html和list.html中引入
<body>
<div th:replace="commons/topbar::topbar">div>
<div class="container-fluid">
<div class="row">
<div th:replace="commons/sidebar::#sidebar(currentURI='main.html')">div>
......
<body>
<div th:replace="commons/topbar::topbar">div>
<div class="container-fluid">
<div class="row">
<div th:replace="commons/sidebar::#sidebar(currentURI='emps')">div>
......
-
显示员工数据，添加增删改按钮
<main role="main" class="col-md-9 ml-sm-auto col-lg-10 pt-3 px-4"> <h2> <button class="btn btn-sm btn-success">添加员工button> h2> <div class="table-responsive"> <table class="table table-striped table-sm"> <thead> <tr> <th>员工号th> <th>姓名th> <th>邮箱th> <th>性别th> <th>部门th> <th>生日th> <th>操作th> tr> thead> <tbody> <tr th:each="emp:${emps}"> <td th:text="${emp.id}">td> <td th:text="${emp.lastName}">td> <td th:text="${emp.email}">td> <td th:text="${emp.gender}==1?'男':'女'">td> <td th:text="${emp.department.departmentName}">td> <td th:text="${#dates.format(emp.birth,'yyyy-MM-dd')}">td> <td> <button class="btn btn-sm btn-primary">修改button> <button class="btn btn-sm btn-danger">删除button> td> tr> tbody> table> div> main>
员工添加
-
创建员工添加页面
add.html...... <body> <div th:replace="commons/topbar::topbar">div> <div class="container-fluid"> <div class="row"> <div th:replace="commons/sidebar::#sidebar(currentURI='emps')">div> <main role="main" class="col-md-9 ml-sm-auto col-lg-10 pt-3 px-4"> <form> <div class="form-group"> <label>LastNamelabel> <input name="lastName" type="text" class="form-control" placeholder="zhangsan"> div> <div class="form-group"> <label>Emaillabel> <input name="email" type="email" class="form-control" placeholder="[email protected]"> div> <div class="form-group"> <label>Genderlabel><br/> <div class="form-check form-check-inline"> <input class="form-check-input" type="radio" name="gender" value="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"> <label class="form-check-label">女label> div> div> <div class="form-group"> <label>departmentlabel> <select name="department.id" class="form-control"> <option th:each="dept:${departments}" th:text="${dept.departmentName}" th:value="${dept.id}">option> select> div> <div class="form-group"> <label>Birthlabel> <input name="birth" type="text" class="form-control" placeholder="zhangsan"> div> <button type="submit" class="btn btn-primary">添加button> form> main> div> div> ...... -
点击链接跳转到添加页面
<a href="/emp" th:href="@{/emp}" class="btn btn-sm btn-success">添加员工a>Copy to clipboardErrorCopied -
EmpController添加映射方法@Autowired private DepartmentDao departmentDao; @GetMapping("/emp") public String toAddPage(Model model) { //准备部门下拉框数据 Collection<Department> departments = departmentDao.getDepartments(); model.addAttribute("departments",departments); return "emp/add"; } -
修改页面遍历添加下拉选项
<select class="form-control"> <option th:each="dept:${departments}" th:text="${dept.departmentName}">option> select> -
表单提交，添加员工
<form th:action="@{/emp}" method="post">Copy to clipboardErrorCopied@PostMapping("/emp") public String add(Employee employee) { System.out.println(employee); //模拟添加到数据库 employeeDao.save(employee); //添加成功重定向到列表页面 return "redirect:/emps"; }
日期格式修改
表单提交的日期格式必须是yyyy/MM/dd的格式，可以在配置文件中修改格式
spring.mvc.date-format=yyyy-MM-dd
员工修改
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点击按钮跳转到编辑页面
<a th:href="@{/emp/}+${emp.id}" class="btn btn-sm btn-primary">修改a>Copy to clipboardErrorCopied -
添加编辑页面，表单的提交要为post方式，提供
_method参数<body> <div th:replace="commons/topbar::topbar">div> <div class="container-fluid"> <div class="row"> <div th:replace="commons/sidebar::#sidebar(currentURI='emps')">div> <main role="main" class="col-md-9 ml-sm-auto col-lg-10 pt-3 px-4"> <form th:action="@{/emp}" method="post"> <input type="hidden" name="id" th:value="${emp.id}"> <input type="hidden" name="_method" value="put"> <div class="form-group"> <label>LastNamelabel> <input name="lastName" th:value="${emp.lastName}" type="text" class="form-control" placeholder="zhangsan"> div> <div class="form-group"> <label>Emaillabel> <input name="email" th:value="${emp.email}" type="email" class="form-control" placeholder="[email protected]"> div> <div class="form-group"> <label>Genderlabel><br/> <div class="form-check form-check-inline"> <input class="form-check-input" type="radio" name="gender" value="1" th:checked="${emp.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="${emp.gender==0}"> <label class="form-check-label">女label> div> div> <div class="form-group"> <label>departmentlabel> <select name="department.id" class="form-control"> <option th:each="dept:${departments}" th:value="${dept.id}" th:selected="${dept.id}==${emp.department.id}" th:text="${dept.departmentName}">option> select> div> <div class="form-group"> <label>Birthlabel> <input name="birth" type="text" class="form-control" placeholder="zhangsan" th:value="${#dates.format(emp.birth,'yyyy-MM-dd')}"> div> <button type="submit" class="btn btn-primary">添加button> form> main> div> div> ...... -
Controller转发到编辑页面，回显员工信息
@GetMapping("/emp/{id}") public String toEditPage(@PathVariable Integer id, Model model) { Employee employee = employeeDao.get(id); //准备部门下拉框数据 Collection<Department> departments = departmentDao.getDepartments(); model.addAttribute("emp", employee).addAttribute("departments", departments); return "emp/edit"; } -
提交表单修改员工信息
@PutMapping("/emp") public String update(Employee employee) { employeeDao.save(employee); return "redirect:/emps"; }
员工删除
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点击删除提交发出delete请求
@DeleteMapping("/emp/{id}") public String delete(@PathVariable String id){ employeeDao.delete(id); return "redirect:/emps"; }如果提示不支持POST请求，在确保代码无误的情况下查看是否配置启动
HiddenHttpMethodFilterspring.mvc.hiddenmethod.filter.enabled=true
这个好像是2.0版本以后修改的
如果删除不掉，请修改
EmployeeDao，把String转为Integer类型public void delete(String id) { employees.remove(Integer.parseInt(id)); }