解決SpringMVC表單重複提交總結

1.表單加添加隱藏域

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

2.編寫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.編寫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配置文件中註冊Interceptor

    <mvc:interceptors>
            <!-- 配置Token攔截器，防止用戶重複提交數據 -->
            <mvc:interceptor>
                <!--攔截所有得URL-->
                <mvc:mapping path="/**"/>
                <!--攔截器路徑-->
                <bean class="cn.zzu.wcj.interceptor.TokenInterceptor"/>

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

Tips:在使用Ajax提交表單時注意獲取隱藏域<input type="hidden" name="token" value="${token}" id="token"/>的值作爲參數傳遞到後臺.