需要在web.xml文件配置
<!--
将POST请求转化为DELETE或者是PUT
要用_method指定真正的请求参数
-->
<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>

在页面上使用隐藏的from提交<form id="deleteF" action="" method="post"><input type="hidden" name="_method" value="DELETE"/>

</form>
或者ajax请求提交
var url = "<c:url value="/product/delete"/>"+"/"+pid+".do";
$.ajax({
type : 'post',
data : {'_method':'delete'},（注意：'_method':'delete'）
dataType : 'json',
url : url,
success : function(data){
window.location.href="http://localhost:8080/product/findAll.do";
},
error:function(){
window.location.href="http://localhost:8080/product/findAll.do";
}
});

后端使用注解配置
@RequestMapping(value = "/delete/{pid}",method = RequestMethod.DELETE)
public String delete(@PathVariable("pid") String id) throws Exception{}或者：
@DeleteMapping("/delete/{pid}")
br/>或者：
@DeleteMapping("/delete/{pid}")