spring 3.0应用 – springmvc结构RESTful URL具体讲授
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2019-06-14

spring 3.0应用 – springmvc结构RESTful URL具体讲授

spring 3.0应用 – springmvc结构RESTful URL具体讲授

副标题#e#

由于下一版本的rapid-framwork需要集成spring RESTful URL,所以研究了一下怎么搭建.并遇到了一下问题。

springmvc 3.0 中增加 RESTful URL成果,结构出雷同javaeye此刻的URL。 rest先容

好比如下URL

Java代码

/blog/1 HTTP GET =>  获得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

以下具体解一下spring rest利用.

首先,我们带着如下两个问题查察本文。

1.如安在java结构没有扩展名的RESTful url,如 /forms/1,而不是 /forms/1.do

2.欣赏器的form标签不支持提交delete,put请求,如何曲线办理

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)即可处理惩罚/blog/1 的delete请求.

Java代码

@RequestMapping(value="/blog/{id}",method=RequestMethod.DELETE)
public ModelAndView delete(@PathVariable Long id,HttpServletRequest request,HttpServletResponse response) {
  blogManager.removeById(id);
  return new ModelAndView(LIST_ACTION);
}

@RequestMapping @PathVariable假如URL中带参数,则共同利用,如

Java代码

@RequestMapping(value="/blog/{blogId}/message/{msgId}",method=RequestMethod.DELETE)
public ModelAndView delete(@PathVariable("blogId") Long blogId,@PathVariable("msgId") Long msgId,HttpServletRequest request,HttpServletResponse response) {
}


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spring rest设置指南

1.springmvc web.xml设置

Xml代码

<!-- 该servlet为tomcat,jetty等容器提供,将静态资源映射从/改为/static/目次,如本来会见 http://localhost/foo.css ,此刻http://localhost/static/foo.css -->
  <servlet-mapping>
  <servlet-name>default</servlet-name>
  <url-pattern>/static/*</url-pattern>
  </servlet-mapping>
  <servlet>
    <servlet-name>springmvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>

  <!-- URL重写filter,用于将会见静态资源http://localhost/foo.css 转为http://localhost/static/foo.css -->
  <filter>
  <filter-name>UrlRewriteFilter</filter-name>
  <filter-class>org.tuckey.web.filters.urlrewrite.UrlRewriteFilter</filter-class>
  <init-param>
     <param-name>confReloadCheckInterval</param-name>
     <param-value>60</param-value>
    </init-param>
  <init-param>
        <param-name>logLevel</param-name>
        <param-value>DEBUG</param-value>
      </init-param>
  </filter>
  <filter-mapping>
  <filter-name>UrlRewriteFilter</filter-name>
  <url-pattern>/*</url-pattern>
  </filter-mapping>

  <!-- 包围default servlet的/, springmvc servlet将处理惩罚本来处理惩罚静态资源的映射 -->
  <servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

  <!-- 欣赏器不支持put,delete等method,由该filter将/blog?_method=delete转换为尺度的http delete要领 -->
  <filter>
  <filter-name>HiddenHttpMethodFilter</filter-name>
  <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
  </filter>

  <filter-mapping>
  <filter-name>HiddenHttpMethodFilter</filter-name>
  <servlet-name>springmvc</servlet-name>
  </filter-mapping>

2.webapp/WEB-INF/springmvc-servlet.xml设置,利用如下两个class激活@RequestMapping annotation

Java代码

<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/>
   <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>

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完整设置

Java代码

<beans default-autowire="byName"  >

  <!-- 自动搜索@Controller标注的类 -->
  <context:component-scan base-package="com.**.controller"/>

   <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/>

   <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>

   <!-- Default ViewResolver -->
   <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
     <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
     <property name="prefix" value="/pages"/>
     <property name="suffix" value=".jsp"></property>
   </bean>

   <bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource" p:basename="i18n/messages"/>

   <!-- Mapping exception to the handler view -->
   <bean id="exceptionResolver" class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
    <!-- to /commons/error.jsp -->
     <property name="defaultErrorView" value="/commons/error"/>
     <property name="exceptionMappings">
       <props>
       </props>
     </property>
   </bean>

</beans>

3.Controller编写

Java代码

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/**
  * @RequestMapping("/userinfo") 具有条理干系,要领级的将在类一级@RequestMapping之一,
  * 如下面示例, 会见要领级此外@RequestMapping("/new"),则URL为 /userinfo/new
  */
@Controller
@RequestMapping("/userinfo")
public class UserInfoController extends BaseSpringController{
  //默认多列排序,example: username desc,createTime asc
  protected static final String DEFAULT_SORT_COLUMNS = null;

  private UserInfoManager userInfoManager;

  private final String LIST_ACTION = "redirect:/userinfo";

  /**
  * 通过spring自动注入
  **/
  public void setUserInfoManager(UserInfoManager manager) {
  this.userInfoManager = manager;
  }

  /** 列表 */
  @RequestMapping
  public ModelAndView index(HttpServletRequest request,HttpServletResponse response,UserInfo userInfo) {
  PageRequest<Map> pageRequest = newPageRequest(request,DEFAULT_SORT_COLUMNS);
  //pageRequest.getFilters(); //add custom filters 

  Page page = this.userInfoManager.findByPageRequest(pageRequest);
  savePage(page,pageRequest,request);
  return new ModelAndView("/userinfo/list","userInfo",userInfo);
  }

  /** 进入新增 */
  @RequestMapping(value="/new")
  public ModelAndView _new(HttpServletRequest request,HttpServletResponse response,UserInfo userInfo) throws Exception {
  return new ModelAndView("/userinfo/new","userInfo",userInfo);
  }

  /** 显示 */
  @RequestMapping(value="/{id}")
  public ModelAndView show(@PathVariable Long id,HttpServletRequest request,HttpServletResponse response) throws Exception {
  UserInfo userInfo = (UserInfo)userInfoManager.getById(id);
  return new ModelAndView("/userinfo/show","userInfo",userInfo);
  }

  /** 编辑 */
  @RequestMapping(value="/{id}/edit")
  public ModelAndView edit(@PathVariable Long id,HttpServletRequest request,HttpServletResponse response) throws Exception {
  UserInfo userInfo = (UserInfo)userInfoManager.getById(id);
  return new ModelAndView("/userinfo/edit","userInfo",userInfo);
  }

  /** 生存新增 */
  @RequestMapping(method=RequestMethod.POST)
  public ModelAndView create(HttpServletRequest request,HttpServletResponse response,UserInfo userInfo) throws Exception {
  userInfoManager.save(userInfo);
  return new ModelAndView(LIST_ACTION);
  }

  /** 生存更新 */
  @RequestMapping(value="/{id}",method=RequestMethod.PUT)
  public ModelAndView update(@PathVariable Long id,HttpServletRequest request,HttpServletResponse response) throws Exception {
  UserInfo userInfo = (UserInfo)userInfoManager.getById(id);
  bind(request,userInfo);
  userInfoManager.update(userInfo);
  return new ModelAndView(LIST_ACTION);
  }

  /** 删除 */
  @RequestMapping(value="/{id}",method=RequestMethod.DELETE)
  public ModelAndView delete(@PathVariable Long id,HttpServletRequest request,HttpServletResponse response) {
  userInfoManager.removeById(id);
  return new ModelAndView(LIST_ACTION);
  }

  /** 批量删除 */
  @RequestMapping(method=RequestMethod.DELETE)
  public ModelAndView batchDelete(HttpServletRequest request,HttpServletResponse response) {
  String[] items = request.getParameterValues("items");
  for(int i = 0; i < items.length; i++) {
   java.lang.Long id = new java.lang.Long(items[i]);
   userInfoManager.removeById(id);
  }
  return new ModelAndView(LIST_ACTION);
  }

}

#p#副标题#e#

上面是rapid-framework 新版本生成器生成的代码,今后也将应用此法则,rest url中增删改查等根基要领与Controller的要领映射法则

Java代码

#p#分页标题#e#

/userinfo  => index()
  /userinfo/new => _new()
  /userinfo/{id} => show()
  /userinfo/{id}/edit  => edit()
  /userinfo POST => create()
  /userinfo/{id} PUT => update()
  /userinfo/{id} DELETE => delete()
  /userinfo DELETE => batchDelete()

注(不利用 /userinfo/add  => add() 要领是由于add这个要了解被maxthon欣赏器当做告白链接过滤掉,因为包括ad字符)

4.jsp 编写

Html代码

<form:form action="${ctx}/userinfo/${userInfo.userId}" method="put">
</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共同利用,在处事端将post请求改为put请求

Java代码

<form id="userInfo" action="/springmvc_rest_demo/userinfo/2" method="post">
  <input type="hidden" name="_method" value="put"/>
</form>

别的一种要领是你可以利用ajax发送put,delete请求.

5.静态资源的URL重写

如上我们描写,现因为将default servlet映射至/static/的子目次,现我们会见静态资源将会带一个/static/前缀.

如 /foo.gif, 此刻会见该文件将是 /static/foo.gif.

那如何制止这个前缀呢,那就是应用URL rewrite,现我们利用 http://tuckey.org/urlrewrite/, 重写法则如下

Xml代码

<urlrewrite>
   <!-- 会见jsp及jspx将不rewrite url,其它.js,.css,.gif等将重写,如 /foo.gif => /static/foo.gif -->
   <rule>
    <condition operator="notequal" next="and" type="request-uri">.*.jsp</condition>
    <condition operator="notequal" next="and" type="request-uri">.*.jspx</condition>
     <from>^(/.*\..*)$</from>
     <to>/static$1</to>
   </rule>
</urlrewrite>

另笔者专门写了一个 RestUrlRewriteFilter来做同样的事件,今后会跟着rapid-framework一起宣布.比这个越发轻量级.

而且该代码已经孝敬给spring,不知会不会在下一版本宣布

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