Springmvc构造RESTful详细讲解

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  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    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    31    < servlet-mapping > 32      < servlet-name > springmvc servlet-name > 33      < url-pattern > / url-pattern > 34    servlet-mapping > 35 36    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 " )  7 public   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  @RequestMapping 24  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} 88

 

1 /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    
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/heartstage/p/3409687.html

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