springmvc实现REST中的GET、POST、PUT和DELETE

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spring mvc 支持REST风格的请求方法，GET、POST、PUT和DELETE四种请求方法分别代表了数据库CRUD中的select、insert、update、delete，下面演示一个简单的REST实现过程。

参照http://blog.csdn.net/u011403655/article/details/44571287创建一个spring mvc工程
创建一个包，命名为me.elin.rest，添加一个RESTMethod类，代码如下

package me.elin.rect;import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;@Controller
@RequestMapping("/rest")
public class RESTMethod {private static final String SUCCESS = "success";// 该方法接受POST传值，请求url为/rest/restPost@RequestMapping(value = "restPost", method = RequestMethod.POST)public String restPost(@RequestParam(value = "id") Integer id) {System.out.println("POST ID:" + id);return SUCCESS;}// 该方法接受GET传值，请求url为/rest/restGet@RequestMapping(value = "/restGet", method = RequestMethod.GET)public String restGet(@RequestParam(value = "id") Integer id) {System.out.println("GET ID:" + id);return SUCCESS;}// 该方法接受PUT传值，请求url为/rest/restPut@RequestMapping(value = "/restPut", method = RequestMethod.PUT)public String restPut(@RequestParam(value = "id") Integer id) {System.out.println("PUT ID:" + id);return SUCCESS;}// 该方法接受DELETE传值，请求url为/rest/restDelete@RequestMapping(value="/restDelete",method=RequestMethod.DELETE)public String restDelete(@RequestParam(value = "id") Integer id) {System.out.println("DELETE ID:" + id);return SUCCESS;}
}

在web.xml中添加一个filter，用来过滤rest中的方法。代码如下

    <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WebContent下创建index.jsp文件，添加如下内容

<a href="rest/restGet?id=1">发送GET请求</a><form action="rest/restPost" method="post"><input type="text" name="id" value="2"/><input type="submit" value="发送POST请求"/>
</form><form action="rest/restPut" method="post"><input type="hidden" name="_method" value="PUT"><input type="text" name="id" value="3"><input type="submit" value="发送PUT请求">
</form><form action="rest/restDelete" method="post"><input type="hidden" name="_method" value="DELETE"><input type="text" name="id" value="4"><input type="submit" value="发送DELETE请求">
</form>