/**
Rest 风格的 URL.
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
如何发送 PUT 请求和 DELETE 请求呢 ?
1. 需要在web.xml文件中配置 HiddenHttpMethodFilter
<!--
配置 org.springframework.web.filter.HiddenHttpMethodFilter: 可以把 POST 请求转为 DELETE 或 POST 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>
2. 需要发送 POST 请求
3. 需要在发送 POST 请求时携带一个 name="_method" 的隐藏域, 值为 DELETE 或 PUT
jsp文件如下：
<form action="springmvc/testRest/1" method="post">
<input type="hidden" name="_method" value="PUT"/>
<input type="submit" value="TestRest PUT"/>
</form>
<br><br>
<form action="springmvc/testRest/1" method="post">
<input type="hidden" name="_method" value="DELETE"/>
<input type="submit" value="TestRest DELETE"/>
</form>
<br><br>
<form action="springmvc/testRest" method="post">
<input type="submit" value="TestRest POST"/>
</form>
<br><br>
<a href="springmvc/testRest/1">Test Rest Get</a>
<br><br>
在 SpringMVC 的目标方法中如何得到 id 呢? 使用 @PathVariable 注解
*/
@RequestMapping(value = "/testRest/{id}", method = RequestMethod.PUT)
public String testRestPut(@PathVariable Integer id) {
System.out.println("testRest Put: " + id);
return SUCCESS;
}
@RequestMapping(value = "/testRest/{id}", method = RequestMethod.DELETE)
public String testRestDelete(@PathVariable Integer id) {
System.out.println("testRest Delete: " + id);
return SUCCESS;
}
@RequestMapping(value = "/testRest", method = RequestMethod.POST)
public String testRest() {
System.out.println("testRest POST");
return SUCCESS;
}
@RequestMapping(value = "/testRest/{id}", method = RequestMethod.GET)
public String testRest(@PathVariable Integer id) {
System.out.println("testRest GET: " + id);
return SUCCESS;
}
/**
* @PathVariable 可以来映射 URL 中的占位符到目标方法的参数中.
* @param id
* @return
*/
@RequestMapping("/testPathVariable/{id}")
public String testPathVariable(@PathVariable("id") Integer id) {
System.out.println("testPathVariable: " + id);
return SUCCESS;
}
@RequestMapping("/testAntPath/*/abc")
public String testAntPath() {
System.out.println("testAntPath");
return SUCCESS;
}