spring mvc & velocity 配置备忘

  Spring里面最重要的概念是IOC和AOP，还有两项很重要的模块是事务和MVC，对于IOC和AOP，我们要深究其源码实现，对于事务，我们务必理解。对于MVC，Spring MVC提供的功能很多、很先进，但我们一般只要用其中的一小部分就可以满足我们的开发需求，另外，我们并不建议你排斥Struts2，因为它也是经过无数公司验证过的优秀的框架。本文给出spring mvc简单配置和部分代码举例。

WEB-INF/web.xml

Xml代码  

1. <?xml version="1.0" encoding="utf-8"?>  
2. <web-app xmlns="http://java.sun.com/xml/ns/javaee"  
3.          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
4.          xsi:schemaLocation="http://java.sun.com/xml/ns/javaee  
5.                       http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"  
6.          version="3.0"  
7.          metadata-complete="true">  
8.   
9.     <display-name>ixhong-admin-web</display-name>  
10.   
11.     <context-param>  
12.         <param-name>contextConfigLocation</param-name>  
13.         <param-value>classpath:spring-context.xml</param-value>  
14.     </context-param>  
15.     <listener>  
16.         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
17.     </listener>  
18.   
19.     <filter>  
20.         <filter-name>characterEncodingFilter</filter-name>  
21.         <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>  
22.         <init-param>  
23.             <param-name>encoding</param-name>  
24.             <param-value>UTF-8</param-value>  
25.         </init-param>  
26.         <init-param>  
27.             <param-name>forceEncoding</param-name>  
28.             <param-value>true</param-value>  
29.         </init-param>  
30.     </filter>  
31.   
32.     <filter-mapping>  
33.         <filter-name>characterEncodingFilter</filter-name>  
34.         <url-pattern>/*</url-pattern>  
35.     </filter-mapping>  
36.   
37.     <servlet>  
38.         <servlet-name>spring-mvc</servlet-name>  
39.         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  
40.         <init-param>  
41.             <param-name>contextConfigLocation</param-name>  
42.             <param-value>classpath:spring-velocity.xml</param-value>  
43.         </init-param>  
44.         <load-on-startup>1</load-on-startup>  
45.     </servlet>  
46.   
47.     <servlet-mapping>  
48.         <servlet-name>spring-mvc</servlet-name>  
49.         <url-pattern>*.xyz</url-pattern>  
50.     </servlet-mapping>  
51.   
52.     <welcome-file-list>  
53.         <welcome-file>/index.html</welcome-file>  
54.     </welcome-file-list>  
55.     <error-page>  
56.         <error-code>404</error-code>  
57.         <location>/404_error.html</location>  
58.     </error-page>  
59. </web-app>  

WEB-INF/velocity-tools.xml

Xml代码  

1. <toolbox>  
2.     <tool>  
3.         <key>stringUtils</key>  
4.         <scope>application</scope>  
5.         <class>org.apache.commons.lang.StringUtils</class>  
6.     </tool>  
7.     <tool>  
8.         <key>dateFormatUtils</key>  
9.         <scope>application</scope>  
10.         <class>org.apache.commons.lang.time.DateFormatUtils</class>  
11.     </tool>  
12.     <tool>  
13.         <key>escapeUtils</key>  
14.         <scope>application</scope>  
15.         <class>org.apache.commons.lang.StringEscapeUtils</class>  
16.     </tool>  
17. </toolbox>  

spring-velocity.xml

Xml代码  

1. <?xml version="1.0" encoding="UTF-8"?>  
2. <beans xmlns="http://www.springframework.org/schema/beans"  
3.        xmlns:mvc="http://www.springframework.org/schema/mvc"  
4.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
5.        xmlns:context="http://www.springframework.org/schema/context"  
6.   
7.        xsi:schemaLocation="http://www.springframework.org/schema/beans  
8.                            http://www.springframework.org/schema/beans/spring-beans-3.2.xsd  
9.                            http://www.springframework.org/schema/mvc  
10.                            http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd  
11.                            http://www.springframework.org/schema/context  
12.                            http://www.springframework.org/schema/context/spring-context-3.2.xsd"  
13.        default-autowire="byName">  
14.     <!-- -->  
15.     <mvc:annotation-driven>  
16.         <mvc:message-converters>  
17.             <bean class="org.springframework.http.converter.StringHttpMessageConverter">  
18.                 <property name = "supportedMediaTypes">  
19.                     <list>  
20.                         <value>text/plain;charset=UTF-8</value>  
21.                         <value>text/html;charset=UTF-8</value>  
22.                     </list>  
23.                 </property>  
24.             </bean>  
25.   
26.         </mvc:message-converters>  
27.     </mvc:annotation-driven>  
28.   
29.     <context:component-scan base-package="com.architectj.admin.web.controller"/>  
30.   
31.     <bean id="velocityConfig" class="org.springframework.web.servlet.view.velocity.VelocityConfigurer">  
32.         <property name="resourceLoaderPath" value="/WEB-INF/vm"/>  
33.         <property name="configLocation" value="classpath:velocity.properties"/>  
34.     </bean>  
35.   
36.     <!-- 上传数据大小 -->  
37.     <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  
38.         <property name="maxUploadSize" value="5242880"/><!-- 最大5M -->  
39.     </bean>  
40.   
41.     <bean id="handlerMapping" class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping">  
42.     </bean>  
43.   
44.     <bean id="exceptionResolver" class="com.architectj.admin.web.ExceptionHandler"/>  
45.   
46.     <bean id="viewResolver" class="org.springframework.web.servlet.view.velocity.VelocityLayoutViewResolver">  
47.         <property name="suffix" value=".vm"/>  
48.         <property name="layoutUrl" value="layout/default.vm"/>  
49.         <!-- 使用springMacro、使用servlet的对象 -->  
50.         <property name="exposeSpringMacroHelpers" value="true"/>  
51.         <property name="exposeRequestAttributes" value="true"/>  
52.         <property name="exposeSessionAttributes" value="true"/>  
53.         <property name="contentType" value="text/html;charset=UTF-8"/>  
54.         <!-- spring的日期格式化 -->  
55.         <property name="dateToolAttribute" value="dateTool"/>  
56.         <property name="toolboxConfigLocation" value="/WEB-INF/velocity-tools.xml"/>  
57.         <property name="attributesMap">  
58.             <map>  
59.             </map>  
60.         </property>  
61.     </bean>  
62.     <mvc:interceptors>  
63.         <mvc:interceptor>  
64.             <mvc:mapping path="/user/**" />  
65.             <mvc:mapping path="/teacher/**"/>  
66.             <bean class="com.architectj.admin.web.interceptor.LoginInterceptor" />  
67.         </mvc:interceptor>  
68.         <mvc:interceptor>  
69.             <mvc:mapping path="/user/**" />  
70.             <mvc:mapping path="/teacher/**"/>  
71.             <bean class="com.architectj.admin.web.interceptor.SecurityInterceptor" />  
72.         </mvc:interceptor>  
73.         <mvc:interceptor>  
74.             <mvc:mapping path="/user/**"/>  
75.             <mvc:mapping path="/teacher/**"/>  
76.             <bean class="com.architectj.admin.web.interceptor.PermissionInterceptor"/>  
77.         </mvc:interceptor>  
78.     </mvc:interceptors>  
79. </beans>  

 velocity.properties

Xml代码  

1. #encoding    
2. input.encoding=UTF-8  
3. output.encoding=UTF-8  
4. contentType=text/html;charset=UTF-8  
5. #autoreload when vm changed  
6. resource.loader=file  
7. file.resource.loader.class=org.apache.velocity.runtime.resource.loader.FileResourceLoader  
8. file.resource.loader.cache=false  
9. file.resource.loader.modificationCheckInterval=1  
10. velocimacro.library.autoreload=true  
11. velocimacro.library=macro.vm  

 macro.vm

Xml代码  

1. #macro(pagination $targetUrl $queryResult)  
2. <div id="kkpager"></div>  
3. <script type="text/javascript" src="/lib/kkpager.min.js"></script>  
4. <script type="text/javascript">  
5.     //init  
6.     $(function(){  
7.         //生成分页  
8.         //有些参数是可选的，比如lang，若不传有默认值  
9.         kkpager.generPageHtml({  
10.             //当前页码  
11.             pno : $!{query.currentPage},  
12.             //总页码  
13.             total : $!{queryResult.totalPage},  
14.             //总数据条数  
15.             totalRecords : $!{queryResult.amount},  
16.             //链接前部  
17.             hrefFormer : '$targetUrl',  
18.             //链接尾部  
19.             hrefLatter : '',  
20.             getLink : function(n){  
21.                 if (n == 1){  
22.                     return this.hrefFormer;  
23.                 }  
24.                 return this.hrefFormer + "&page="+n;  
25.             }  
26.         });  
27.     });  
28. </script>  
29. #end  

 LoginInterceptor

Java代码  

1. public class LoginInterceptor implements HandlerInterceptor{  
2.   
3.     @Override  
4.     public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {  
5.          // 解析cookie得到source  
6.         UserDO user = this.decoder(source);  
7.         LoginContext context = new LoginContext();  
8.         context.setUser(user);  
9.         LoginContextHolder.set(context);  
10.         return true;  
11.     }  
12.   
13.     @Override  
14.     public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {  
15.         if(modelAndView != null) {  
16.             modelAndView.addObject("xxx",LoginContextHolder.getLoginUser());  
17.         }  
18.     }  
19.   
20.     @Override  
21.     public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {  
22.         LoginContextHolder.clear();  
23.     }  
24.   
25.   
26.     protected UserDO decoder(String content){  
27.         // ...  
28.         return user;  
29.     }  
30.   
31.   
32. }  

 SecurityInterceptor

Java代码  

1. public class SecurityInterceptor implements HandlerInterceptor{  
2.   
3.     @Override  
4.     public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {  
5.         LoginContext loginContext = LoginContextHolder.get();  
6.         if(loginContext != null && loginContext.getUser() != null) {  
7.             return true;  
8.         }  
9.         response.sendRedirect("/login.xyz");//登陆  
10.         return false;  
11.     }  
12.   
13.     @Override  
14.     public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {  
15.   
16.     }  
17.   
18.     @Override  
19.     public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {  
20.   
21.     }  
22. }  

 Controller

Java代码  

1. @Controller  
2. public class IndexController extends BaseController{  
3.   
4.     @Autowired  
5.     private AdminService adminService;  
6.   
7.     @RequestMapping("/login")  
8.     public ModelAndView login(HttpServletRequest request,HttpServletResponse response) {  
9.         ModelAndView mav = new ModelAndView();  
10.         if (LoginContextHolder.getLoginUser() != null){  
11.             mav.setViewName("redirect:/yyy/list.xyz");  
12.         }  
13.         return mav;  
14.     }  
15.   
16.     @RequestMapping(value = "xxxxxx", method = {RequestMethod.POST, RequestMethod.GET})  
17.     @ResponseBody  
18.     public String loginAction(@RequestParam("name") String name, @RequestParam("password") String password,  
19.                               @RequestParam("code") String code,  
20.                               HttpServletRequest request,HttpServletResponse response) {  
21.   
22.         if(LoginContextHolder.getLoginUser() != null){  
23.             Result result = new Result();  
24.             result.setSuccess(true);  
25.             return ResultHelper.renderAsJson(result);  
26.         }  
27.   
28.         //验证码校验  
29.         // ...  
30.   
31.         Result result = this.adminService.login(name.trim(), password);  
32.         // ...  
33.         return ResultHelper.renderAsJson(result);  
34.     }  
35.   
36. }  

 附：velocity注释是 ##  注释掉的东西不会再html源码里显示，而<!--会显示，模版引擎/编译器会做忽略的事情，HTML的注释不会忽略

原文链接：[http://wely.iteye.com/blog/2278604]