Springmvc构造RESTful详细讲解
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Rest介绍
/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.
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
2public ModelAndView delete(@PathVariable("blogId") Long blogId,@PathVariable("msgId") Long msgId,HttpServletRequest request,HttpServletResponse response) {
3}
1.springmvc web.xml配置
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
2<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>
3
3.Controller编写
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;
10
11 private UserInfoManager userInfoManager;
12
13 private final String LIST_ACTION = "redirect:/userinfo";
14
15 /**
16 * 通过spring自动注入
17 **/
18 public void setUserInfoManager(UserInfoManager manager) {
19 this.userInfoManager = manager;
20 }
21
22 /** 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
27
28 Page page = this.userInfoManager.findByPageRequest(pageRequest);
29 savePage(page,pageRequest,request);
30 return new ModelAndView("/userinfo/list","userInfo",userInfo);
31 }
32
33 /** 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 }
38
39 /** 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 }
45
46 /** 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 }
52
53 /** 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 }
59
60 /** 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 }
68
69 /** 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 }
75
76 /** 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 }
86
87}
88
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
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
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
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>
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