Springmvc构造RESTful详细讲解

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springrest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RESTfulurl,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

    springmvcrest 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)
2public　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)
2public　ModelAndView　delete(@PathVariable("blogId")　Long　blogId,@PathVariable("msgId")　Long　msgId,HttpServletRequest　request,HttpServletResponse　response)　{
3}

    1.springmvcweb.xml配置

 1
 2　 <</span>servlet-mapping>
 3　 <</span>servlet-name>default</</span>servlet-name>
 4　 <</span>url-pattern>/static
 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;
10
11　 private　UserInfoManager　userInfoManager;
12
13　 private　final　String　LIST_ACTION　=　"redirect:/userinfo";
14
15　 
18　 public　void　setUserInfoManager(UserInfoManager　manager)　{
19　 this.userInfoManager　=　manager;
20　 }
21
22　 
23　 @RequestMapping
24　 public　ModelAndView　index(HttpServletRequest　request,HttpServletResponse　response,UserInfo　userInfo)　{
25　 PageRequest<</span>Map>　pageRequest　=　newPageRequest(request,DEFAULT_SORT_COLUMNS);
26　 //pageRequest.getFilters();　//add　custom　filters　
27
28　 Page　page　=　this.userInfoManager.findByPageRequest(pageRequest);
29　 savePage(page,pageRequest,request);
30　 return　new　ModelAndView("/userinfo/list","userInfo",userInfo);
31　 }
32
33　 
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　 }
38
39　 
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　 }
45
46　 
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　 }
52
53　 
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　 }
59
60　 
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　 }
68
69　 
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　 }
75
76　 
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　<</span>　items.length;　i++)　{
81　　 java.lang.Long　id　=　new　;">　　 userInfoManager.removeById(id);
83　 }
84　 return　new　ModelAndView(LIST_ACTION);
85　 }
86
87}
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<</span>form:form　action="${ctx}/userinfo${userInfo.userId}"　method="put">
2</</span>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<</span>form　id="userInfo"　action="/springmvc_rest_demo/userinfo/2"　method="post">
2　 <</span>input　type="hidden"　name="_method"　value="put"/>
3</</span>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defaultservlet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URLrewrite,现我们使用 http://tuckey.org/urlrewrite/,重写规则如下

    

1<</span>urlrewrite>
2　　 
3　　 <</span>rule>
4　　　 <</span>condition　operator="notequal"　next="and"　type="request-uri">.*.jsp</</span>condition>
5　　　 <</span>condition　operator="notequal"　next="and"　type="request-uri">.*.jspx</</span>condition>
6　　　　 <</span>from>^(/.*\..*)$</</span>from>
7　　　　 <</span>to>/static$1</</span>to>
8　　 </</span>rule>
9</</span>urlrewrite>