Spring MVC过滤器-HiddenHttpMethodFilter

需要注意的是，由于doFilterInternal方法只对method为post的表单进行过滤，所以在页面中必须如下设置：

<form action="..." method="post">
    <input type="hidden" name="_method" value="put" />
        ......
</form>

而不是使用：

<form action="..." method="put">
        ......
</form>

同时，HiddenHttpMethodFilter必须作用于dispatcher前，所以在web.xml中配置HiddenHttpMethodFilter时，需参照如下代码：

        <filter>  
                <filter-name>HiddenHttpMethodFilter</filter-name>  
                <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>  
        </filter>  
        <filter-mapping>  
                <filter-name>HiddenHttpMethodFilter</filter-name>  
                <servlet-name>spring</servlet-name>  
        </filter-mapping>
        <servlet>
        <servlet-name>spring</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:dispatcher.xml</param-value>
        </init-param>
    </servlet>
        <servlet-mapping>
        <servlet-name>spring</servlet-name>
        <url-pattern>*.html</url-pattern>
    </servlet-mapping>

下面是一个示例：

<form th:action="@{/emp}" method="post">  
<!--发送put请求修改员工数据-->
    <!--
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";值就是我们指定的请求方式
-->
    <input type="hidden" name="_method" value="put" th:if="${emp!=null}"/>
    <input type="hidden" name="id" th:if="${emp!=null}" th:value="${emp.id}">
    <div class="form-group">
        <label>LastName</label>
        <input name="lastName" type="text" class="form-control" placeholder="zhangsan" th:value="${emp!=null}?${emp.lastName}">
    </div>
    <div class="form-group">
        <label>Email</label>
        <input name="email" type="email" class="form-control" placeholder="zhangsan@atguigu.com" th:value="${emp!=null}?${emp.email}">
    </div>
    <div class="form-group">
        <label>Gender</label><br/>
        <div class="form-check form-check-inline">
            <input class="form-check-input" type="radio" name="gender" value="1" th:checked="${emp!=null}?${emp.gender==1}">
            <label class="form-check-label">男</label>
        </div>
        <div class="form-check form-check-inline">
            <input class="form-check-input" type="radio" name="gender" value="0" th:checked="${emp!=null}?${emp.gender==0}">
            <label class="form-check-label">女</label>
        </div>
    </div>
    <div class="form-group">
        <label>department</label>
        <!--提交的是部门的id-->
        <select class="form-control" name="department.id">
            <option th:selected="${emp!=null}?${dept.id == emp.department.id}" th:value="${dept.id}" th:each="dept:${depts}" th:text="${dept.departmentName}">1</option>
        </select>
    </div>
    <div class="form-group">
        <label>Birth</label>
        <input name="birth" type="text" class="form-control" placeholder="zhangsan" th:value="${emp!=null}?${#dates.format(emp.birth, 'yyyy-MM-dd HH:mm')}">
    </div>
    <button type="submit" class="btn btn-primary" th:text="${emp!=null}?'修改':'添加'">添加</button>
</form>

Spring MVC过滤器-HiddenHttpMethodFilter

标签：标准   framework   示例   web   sel   而不是   pos   post请求   last   

原文地址：https://www.cnblogs.com/codingcc1/p/11073297.html