SpringMVC框架
3.3 HiddenHttpMethodFilter过滤器源码分析
- 为什么请求隐含参数名称必须叫做”_method”
- hiddenHttpMethodFilter 的处理过程
3.4 实验代码
- 配置HiddenHttpMethodFilter过滤器
<!-- 支持REST风格的过滤器:可以将POST请求转换为PUT或DELETE请求 --> <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> |
- 代码
/** * 1.测试REST风格的 GET,POST,PUT,DELETE 操作 * 以CRUD为例: * 新增: /order POST * 修改: /order/1 PUT update?id=1 * 获取: /order/1 GET get?id=1 * 删除: /order/1 DELETE delete?id=1
* 2.如何发送PUT请求或DELETE请求? * ①.配置HiddenHttpMethodFilter * ②.需要发送POST请求 * ③.需要在发送POST请求时携带一个 name="_method"的隐含域,值为PUT或DELETE
* 3.在SpringMVC的目标方法中如何得到id值呢? * 使用@PathVariable注解 */ @RequestMapping(value="/testRESTGet/{id}",method=RequestMethod.GET) public String testRESTGet(@PathVariable(value="id") Integer id){ System.out.println("testRESTGet id="+id); return "success"; }
@RequestMapping(value="/testRESTPost",method=RequestMethod.POST) public String testRESTPost(){ System.out.println("testRESTPost"); return "success"; }
@RequestMapping(value="/testRESTPut/{id}",method=RequestMethod.PUT) public String testRESTPut(@PathVariable("id") Integer id){ System.out.println("testRESTPut id="+id); return "success"; }
@RequestMapping(value="/testRESTDelete/{id}",method=RequestMethod.DELETE) public String testRESTDelete(@PathVariable("id") Integer id){ System.out.println("testRESTDelete id="+id); return "success"; } |