解决SpringMVC表单重复提交总结

1.表单加添加隐藏域

<input type="hidden" name="token" value="${token}" id="token"/>

2.编写Annotation

package cn.zzu.wcj.interceptor.token;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface Token {

boolean save() default false;

boolean remove() default false;
}

3.编写Inteceptor

package cn.zzu.wcj.interceptor;

import java.lang.reflect.Method;

import java.util.UUID;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import cn.zzu.wcj.interceptor.token.Token;

public class TokenInterceptor extends HandlerInterceptorAdapter {
private static final Logger LOG = Logger.getLogger(Token.class);
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
if (handler instanceof HandlerMethod) {
HandlerMethod handlerMethod = (HandlerMethod) handler;
Method method = handlerMethod.getMethod();
Token annotation = method.getAnnotation(Token.class);
if (annotation != null) {
boolean needSaveSession = annotation.save();
if (needSaveSession) {
request.getSession(true).setAttribute("token", UUID.randomUUID().toString());
}
boolean needRemoveSession = annotation.remove();
if (needRemoveSession) {
if (isRepeatSubmit(request)) {
LOG.warn("please don't repeat submit,url:"+ request.getServletPath());
return false;
}
request.getSession(true).removeAttribute("token");
}
}
return true;
} else {
return super.preHandle(request, response, handler);
}
}

private boolean isRepeatSubmit(HttpServletRequest request) {
String serverToken = (String) request.getSession(true).getAttribute("token");
if (serverToken == null) {
return true;
}
String clinetToken = request.getParameter("token");
if (clinetToken == null) {
return true;
}
if (!serverToken.equals(clinetToken)) {
return true;
}
return false;
}
}

4.在SpringMVC配置文件中注册Interceptor

<mvc:interceptors>
<!-- 配置Token拦截器，防止用户重复提交数据 -->
<mvc:interceptor>
<!--拦截所有得URL-->
<mvc:mapping path="/**"/>
<!--拦截器路径-->
<bean class="cn.zzu.wcj.interceptor.TokenInterceptor"/>

</mvc:interceptor>
</mvc:interceptors>

Tips:在使用Ajax提交表单时注意获取隐藏域

<input type="hidden" name="token" value="${token}" id="token"/>

的值作为参数传递到后台.