注解的一些基础:
参见http://blog.csdn.net/duo2005duo/article/details/50505884和
http://blog.csdn.net/duo2005duo/article/details/50511476这两篇文章
1,自定义一个注解@Token 用来标记需要防止重复提交的方法
1 package com.bjca.framework.util; 2 /** 3 * <p> 4 *关于这个方法的用法是: 5 *在需要生成token的controller上增加@Token(save=true), 6 *而在需要检查重复提交的controller上添加@Token(remove=true)就可以了 7 *另外,你需要在view里在form里增加下面代码: 8 *<input type="hidden" name="token" value="${token}"> 9 * 此时会在拦截器中验证是否重复提交 10 * </p> 11 * 12 */ 13 import java.lang.annotation.*; 14 15 @Target(ElementType.METHOD) 16 @Retention (RetentionPolicy.RUNTIME) 17 public @interface Token { 18 19 boolean save() default false ; 20 21 boolean remove() default false ; 22 }
2,自定义一个针对该注解的拦截器 TokenInterceptor
1 package com.bjca.framework.util; 2 3 import org.apache.commons.logging.Log; 4 import org.apache.commons.logging.LogFactory; 5 import org.springframework.web.method.HandlerMethod; 6 import org.springframework.web.servlet.handler.HandlerInterceptorAdapter; 7 8 import javax.servlet.http.HttpServletRequest; 9 import javax.servlet.http.HttpServletResponse; 10 import java.lang.reflect.Method; 11 import java.util.UUID; 12 13 public class TokenInterceptor extends HandlerInterceptorAdapter { 14 public static Log log = LogFactory.getLog(TokenInterceptor.class); 15 @Override 16 public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { 17 System.out.println(handler.getClass()); 18 if (handler instanceof HandlerMethod) { 19 HandlerMethod handlerMethod = (HandlerMethod) handler; 20 Method method = handlerMethod.getMethod(); 21 Token annotation = method.getAnnotation(Token. class ); 22 23 if (annotation != null ) { 24 boolean needSaveSession = annotation.save(); 25 if (needSaveSession) { 26 String uuid=UUID.randomUUID().toString(); 27 log.debug("提交生成除令牌"+uuid); 28 request.getSession( false ).setAttribute( "token" , uuid); 29 } 30 boolean needRemoveSession = annotation.remove(); 31 if (needRemoveSession) { 32 if (isRepeatSubmit(request)) { 33 return false ; 34 } 35 log.debug("提交移除令牌"+request.getSession().getAttribute("token" )); 36 request.getSession( false ).removeAttribute( "token" ); 37 } 38 } 39 return true ; 40 } else { 41 return super .preHandle(request, response, handler); 42 } 43 } 44 45 private boolean isRepeatSubmit(HttpServletRequest request) { 46 String serverToken = (String) request.getSession( false ).getAttribute( "token" ); 47 if (serverToken == null ) { 48 return true ; 49 } 50 String clinetToken = request.getParameter( "token" ); 51 if (clinetToken == null ) { 52 return true ; 53 } 54 if (!serverToken.equals(clinetToken)) { 55 return true ; 56 } 57 return false ; 58 } 59 }
3,在spring MVC的配置文件里注册该拦截器
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:p="http://www.springframework.org/schema/p" 6 xmlns:context="http://www.springframework.org/schema/context" 7 xsi:schemaLocation="http://www.springframework.org/schema/beans 8 http://www.springframework.org/schema/beans/spring-beans-4.0.xsd 9 http://www.springframework.org/schema/context 10 http://www.springframework.org/schema/context/spring-context-4.0.xsd 11 http://www.springframework.org/schema/mvc 12 http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd" 13 > 14 <!-- 对spring org.lxh包下所有注解扫描 --> 15 <context:component-scan base-package="com.xxx"> 16 <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Repository" /> 17 </context:component-scan> 20 <!-- 支持spring mvc新的注解类型 详细spring3.0手册 15.12.1 mvc:annotation-driven--> 21 <mvc:annotation-driven /> 22 23 <bean id="viewResolver" 24 class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 25 <!-- 为了使用JSTL Tag修改默认的viewClass属性 --> 26 <property 27 name="viewClass" 28 value="org.springframework.web.servlet.view.JstlView" /> 29 <property 30 name="prefix" 31 value="/WEB-INF/views/" /> 32 <property 33 name="suffix" 34 value=".jsp"></property> 35 <property 36 name="order" 37 value="1"></property> 38 </bean> 39 <!-- 拦截器 --> 40 <mvc:interceptors> 41 <!-- 用户登录拦截 --> 42 <bean class="com.xx.xxx.filter.StageSecurityInterceptor"> 43 <property name="patterns" > 44 <list> 45 <value>.*/console/.*\.jhtml</value> 46 <value>.*/center/.*\.jhtml</value> 47 48 </list> 49 </property> 50 <property name="loginView"> 51 <value>/manage.jsp</value> 52 </property> 53 </bean> 54 <!-- 配置Token拦截器,防止用户重复提交数据 --> 55 <mvc:interceptor> 56 <mvc:mapping path="/**"/> 57 <bean class="com.xxx.framework.util.TokenInterceptor"/> 58 </mvc:interceptor> 59 </mvc:interceptors> 60 <!-- 61 <bean id="viewResolver" 62 class="org.springframework.web.servlet.view.ResourceBundleViewResolver"> 63 <property name="basenames"> 64 <list> 65 <value>views-stage</value> 66 </list> 67 </property> 68 </bean> 69 --> 70 </beans>
4,演示demo
4.1,在跳转至某个需要加上@Token(save = true)
1 @RequestMapping("/personalForm.jhtml") 2 @Token(save = true) 3 public String personalForm(HttpServletRequest request, HttpServletResponse response, ModelMap modelMap) { 4 Account account = Account.sessionAccount(); 5 if (account == null) { 6 return "redirect:/login.jsp"; 7 } 8 //..........业务.............. 9 }
4.2,在上个Controller 跳转的方法上加入${Token}
1 <div class="main clearfix nav center regist copyright_main5"> 2 <h3 class="registTitle">填写身份信息</h3> 3 <img alt="" src="<c:url value='/platform/stage/image/regist/wave.png'/>"><br /> <img src="<c:url value='/platform/stage/image/portals/regist-info.png'/>"></img> 4 <c:if test="${personalInfoForm.checkState eq 2}"> 5 <br/> 6 <div> 7 <font color="red" size="2"><span>身份认证意见:${personalInfoForm.checkOpnion}</span></font> 8 </div> 9 </c:if> 10 <form autocomplete="off" style="margin: 0;" id="form1" method="post" name="personalInfoForm" action="<c:url value='/center/member/savePersonalInfo.jhtml'/>" enctype="multipart/form-data"> 11 <input type="hidden" value="${personalInfoForm.id}" name="id" /> 12 <input type="hidden" name="token" value="${token}">
4.3,在表单提交方法的地方加上注解 @Token(remove = true)
1 @RequestMapping(value = "/savePersonalInfo.jhtml", method = {RequestMethod.POST}) 2 @Token(remove = true) 3 public String savePersonalInfo(HttpServletRequest request, HttpServletResponse response, ModelMap modelMap, PersonalInfo personalInfoForm) throws Exception { 4 DateFormat fm = new SimpleDateFormat("yyyy-MM-dd"); 5 Date birthday = fm.parse(request.getParameter("birthday2")); 6 personalInfoForm.setBirthday(birthday); 7 8 Account account = Account.sessionAccount(); 9 if(account==null){ 10 return "redirect:/login.jsp"; 11 } 12 //.....................业务......................... 13 }
5,完成了。