Rest介绍
/blog/1 HTTP GET => 得到id = 1的blog /blog/1 HTTP DELETE => 删除 id = 1的blog /blog/1 HTTP PUT => 更新id = 1的blog /blog HTTP POST => 新增BLOG
以下详细解一下spring rest使用.
首先,我们带着如下两个问题查看本文。
1.如何在java构造没有扩展名的RESTful url,如 /forms/1,而不是 /forms/1.do
2.浏览器的form标签不支持提交delete,put请求,如何曲线解决
springmvc rest 实现
springmvc的resturl是通过@RequestMapping 及@PathVariable annotation提供的, 通过如@RequestMapping(value="/blog /{id}",method=RequestMethod.DELETE)即可处理/blog/1 的delete请求.
1 @RequestMapping(value="/blog/{id}",method=RequestMethod.DELETE) 2 public ModelAndView delete(@PathVariable Long id,HttpServletRequest request,HttpServletResponse response) {3 blogManager.removeById(id);4 return new ModelAndView(LIST_ACTION);5}
@RequestMapping @PathVariable如果URL中带参数,则配合使用,如
1 @RequestMapping(value="/blog/{blogId}/message/{msgId}",method=RequestMethod.DELETE) 2 public ModelAndView delete(@PathVariable("blogId") Long blogId,@PathVariable("msgId") Long msgId,HttpServletRequest request,HttpServletResponse response) {3}
1.springmvc web.xml配置
1 <!-- 该servlet为tomcat,jetty等容器提供,将静态资源映射从/改为/static/目录,如原来访问 http://localhost/foo.css ,现在http://localhost/static/foo.css --> 2 <servlet-mapping> 3 <servlet-name>default</servlet-name> 4 <url-pattern>/static/*</url-pattern> 5 </servlet-mapping> 6 <servlet> 7 <servlet-name>springmvc</servlet-name> 8 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 9 <load-on-startup>1</load-on-startup> 10 </servlet> 11 12 <!-- URL重写filter,用于将访问静态资源http://localhost/foo.css 转为http://localhost/static/foo.css --> 13 <filter> 14 <filter-name>UrlRewriteFilter</filter-name> 15 <filter-class>org.tuckey.web.filters.urlrewrite.UrlRewriteFilter</filter-class> 16 <init-param> 17 <param-name>confReloadCheckInterval</param-name> 18 <param-value>60</param-value> 19 </init-param> 20 <init-param> 21 <param-name>logLevel</param-name> 22 <param-value>DEBUG</param-value> 23 </init-param> 24 </filter> 25 <filter-mapping> 26 <filter-name>UrlRewriteFilter</filter-name> 27 <url-pattern>/*</url-pattern> 28 </filter-mapping> 29 30 <!-- 覆盖default servlet的/, springmvc servlet将处理原来处理静态资源的映射 --> 31 <servlet-mapping> 32 <servlet-name>springmvc</servlet-name> 33 <url-pattern>/</url-pattern> 34 </servlet-mapping> 35 36 <!-- 浏览器不支持put,delete等method,由该filter将/blog?_method=delete转换为标准的http delete方法 --> 37 <filter> 38 <filter-name>HiddenHttpMethodFilter</filter-name> 39 <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class> 40 </filter> 41 42 <filter-mapping> 43 <filter-name>HiddenHttpMethodFilter</filter-name> 44 <servlet-name>springmvc</servlet-name> 45 </filter-mapping>
2.webapp/WEB-INF/springmvc-servlet.xml配置,使用如下两个class激活@RequestMapping annotation
1 <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/> 2 <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/> 3
3.Controller编写
1 /** 2 * @RequestMapping("/userinfo") 具有层次关系,方法级的将在类一级@RequestMapping之一, 3 * 如下面示例, 访问方法级别的@RequestMapping("/new"),则URL为 /userinfo/new 4 */ 5@Controller 6@RequestMapping("/userinfo") 7public class UserInfoController extends BaseSpringController{ 8 //默认多列排序,example: username desc,createTime asc 9 protected static final String DEFAULT_SORT_COLUMNS = null;1011 private UserInfoManager userInfoManager;1213 private final String LIST_ACTION = "redirect:/userinfo";1415 /**16 * 通过spring自动注入17 **/18 public void setUserInfoManager(UserInfoManager manager) {19 this.userInfoManager = manager;20 }2122 /** 列表 */23 @RequestMapping24 public ModelAndView index(HttpServletRequest request,HttpServletResponse response,UserInfo userInfo) {25 PageRequest<Map> pageRequest = newPageRequest(request,DEFAULT_SORT_COLUMNS);26 //pageRequest.getFilters(); //add custom filters 2728 Page page = this.userInfoManager.findByPageRequest(pageRequest);29 savePage(page,pageRequest,request);30 return new ModelAndView("/userinfo/list","userInfo",userInfo);31 }3233 /** 进入新增 */34 @RequestMapping(value="/new")35 public ModelAndView _new(HttpServletRequest request,HttpServletResponse response,UserInfo userInfo) throws Exception {36 return new ModelAndView("/userinfo/new","userInfo",userInfo);37 }3839 /** 显示 */40 @RequestMapping(value="/{id}")41 public ModelAndView show(@PathVariable Long id,HttpServletRequest request,HttpServletResponse response) throws Exception {42 UserInfo userInfo = (UserInfo)userInfoManager.getById(id);43 return new ModelAndView("/userinfo/show","userInfo",userInfo);44 }4546 /** 编辑 */47 @RequestMapping(value="/{id}/edit")48 public ModelAndView edit(@PathVariable Long id,HttpServletRequest request,HttpServletResponse response) throws Exception {49 UserInfo userInfo = (UserInfo)userInfoManager.getById(id);50 return new ModelAndView("/userinfo/edit","userInfo",userInfo);51 }5253 /** 保存新增 */54 @RequestMapping(method=RequestMethod.POST)55 public ModelAndView create(HttpServletRequest request,HttpServletResponse response,UserInfo userInfo) throws Exception {56 userInfoManager.save(userInfo);57 return new ModelAndView(LIST_ACTION);58 }5960 /** 保存更新 */61 @RequestMapping(value="/{id}",method=RequestMethod.PUT)62 public ModelAndView update(@PathVariable Long id,HttpServletRequest request,HttpServletResponse response) throws Exception {63 UserInfo userInfo = (UserInfo)userInfoManager.getById(id);64 bind(request,userInfo);65 userInfoManager.update(userInfo);66 return new ModelAndView(LIST_ACTION);67 }6869 /** 删除 */70 @RequestMapping(value="/{id}",method=RequestMethod.DELETE)71 public ModelAndView delete(@PathVariable Long id,HttpServletRequest request,HttpServletResponse response) {72 userInfoManager.removeById(id);73 return new ModelAndView(LIST_ACTION);74 }7576 /** 批量删除 */77 @RequestMapping(method=RequestMethod.DELETE)78 public ModelAndView batchDelete(HttpServletRequest request,HttpServletResponse response) {79 String[] items = request.getParameterValues("items");80 for(int i = 0; i < items.length; i++) {81 java.lang.Long id = new java.lang.Long(items[i]);82 userInfoManager.removeById(id);83 }84 return new ModelAndView(LIST_ACTION);85 }8687}881 /userinfo => index() 2 /userinfo/new => _new() 3 /userinfo/{id} => show() 4 /userinfo/{id}/edit => edit() 5 /userinfo POST => create() 6 /userinfo/{id} PUT => update() 7 /userinfo/{id} DELETE => delete() 8 /userinfo DELETE => batchDelete() 9
注(不使用 /userinfo/add => add() 方法是由于add这个方法会被maxthon浏览器当做广告链接过滤掉,因为包含ad字符)
4.jsp 编写
1 <form:form action="${ctx}/userinfo${userInfo.userId}" method="put"> 2 </form:form>
生成的html内容如下, 生成一个hidden的_method=put,并于web.xml中的HiddenHttpMethodFilter配合使用,在服务端将post请求改为put请求
1 <form id="userInfo" action="/springmvc_rest_demo/userinfo/2" method="post"> 2 <input type="hidden" name="_method" value="put"/> 3 </form>
另外一种方法是你可以使用ajax发送put,delete请求.
5.静态资源的URL重写
如上我们描述,现因为将default servlet映射至/static/的子目录,现我们访问静态资源将会带一个/static/前缀.
如 /foo.gif, 现在访问该文件将是 /static/foo.gif.
那如何避免这个前缀呢,那就是应用URL rewrite,现我们使用 http://tuckey.org/urlrewrite/, 重写规则如下
1 <urlrewrite> 2 <!-- 访问jsp及jspx将不rewrite url,其它.js,.css,.gif等将重写,如 /foo.gif => /static/foo.gif --> 3 <rule> 4 <condition operator="notequal" next="and" type="request-uri">.*.jsp</condition> 5 <condition operator="notequal" next="and" type="request-uri">.*.jspx</condition> 6 <from>^(/.*\..*)$</from> 7 <to>/static$1</to> 8 </rule> 9 </urlrewrite>
转载于:https://www.cnblogs.com/kms1989/p/5535478.html
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