3.SpringMVC_HiddenHttpMethodFilter

1.利用REST风格URL来进行资源处理

HTTP的四种请求方式GET POST PUT DELETE分别处理查增改删操作。那么在springmvc里，HiddenHttpMethodFilter会将post请求转化为put或delete。（因为

浏览器form只支持get和post）

在web.xml中配置该过滤器

<!-- 配置HiddlenHttpMethodFilter:可以把POST请求转换为PUT或者DELETE -->

<filter>
<filter-name>HiddenHttpMethodFilter</filter-name>
<filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>HiddenHttpMethodFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

对应jsp页面

<form action="springmvc/testRest/1" method="post">
<input type="hidden" name="_method" value="PUT"/>
<input type="submit" value="Test PUT">
</form>
<br><br>

<form action="springmvc/testRest/1" method="post">
<input type="hidden" name="_method" value="DELETE"/>
<input type="submit" value="Test DELETE">
</form>
<br><br>

<form action="springmvc/testRest" method="post">
<input type="submit" value="Test Post">
</form>
<br><br>

<a href="springmvc/testRest/1">Test REST get</a>
<br> <br> <br>

处理java类
private static final String SUCCESS="success";

@RequestMapping(value="/testRest/{id}",method=RequestMethod.PUT)
public String testRestPUT(@PathVariable(value="id") Integer id){
System.out.println("REST PUT:"+id);
return SUCCESS;
}

@RequestMapping(value="/testRest/{id}",method=RequestMethod.DELETE)
public String testRestDELETE(@PathVariable(value="id") Integer id){
System.out.println("REST DELETE:"+id);
return SUCCESS;
}

@RequestMapping(value="/testRest",method=RequestMethod.POST)
public String testRestPOST(){
System.out.println("REST POST:");
return SUCCESS;
}

@RequestMapping(value="/testRest/{id}",method=RequestMethod.GET)
public String testRest(@PathVariable(value="id") Integer id){
System.out.println("REST GET:"+id);
return SUCCESS;
}

注意：在Tomcat8中，DELETE和PUT无法跳转success.jsp页面，低版本可以。通过重定向到另外Controller来解决可以。
@RequestMapping(value="/testRest/{id}",method=RequestMethod.DELETE)
public String testRestDELETE(@PathVariable(value="id") Integer id){
System.out.println("REST DELETE:"+id);
return "redirect:/springmvc/testMethod";
}

@RequestMapping(value="/testMethod",method=RequestMethod.GET)
public String testMethod(){
System.out.println("testMethod");
return SUCCESS;
}