这篇文章给大家介绍springmvc中如何防止表单重复提交,内容非常详细,感兴趣的小伙伴们可以参考借鉴,希望对大家能有所帮助。
初始化页面时生成一个唯一token,将其放在页面隐藏域和session中
拦截器拦截请求,校验来自页面请求中的token与session中的token是否一致
判断,如果一致则提交成功并移除session中的token,不一致则说明重复提交并记录日志
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface Token {
boolean save() default false;
boolean remove() default false;
}
@Slf4j
public class RepeatSubmitInterceptor extends HandlerInterceptorAdapter {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
HandlerMethod handlerMethod = null;
try {
handlerMethod = (HandlerMethod)handler;
} catch (Exception e) {
return true;
}
Method method = handlerMethod.getMethod();
Token token = method.getAnnotation(Token.class);
if(token != null ){
boolean saveSession = token.save();
if(saveSession){
request.getSession(true).setAttribute("token", UUID.randomUUID());
}
boolean removeSession = token.remove();
if(removeSession){
if(isRepeatSubmitSession(request)){
log.info("repeat submit session :" + request.getServletPath());
response.sendRedirect("/error/409");
return false;
}
request.getSession(true).removeAttribute("token");
}
}
return true;
}
private boolean isRepeatSubmitSession(HttpServletRequest request){
String sessionToken = String.valueOf(request.getSession(true).getAttribute("token") == null ? "" : request.getSession(true).getAttribute("token"));
String clientToken = String.valueOf(request.getParameter("token") == null ? "" : request.getParameter("token"));
if(sessionToken == null || sessionToken.equals("")){
return true;
}
if(clientToken == null || clientToken.equals("")){
return true;
}
if(!sessionToken.equals(clientToken)){
return true;
}
return false;
}
}
<mvc:interceptor>
<mvc:mapping path="/**"/>
<bean class="com.chinagdn.base.common.interceptor.RepeatSubmitInterceptor"/>
</mvc:interceptor>
使用案例
//save = true 用于生成token
@Token(save = true)
@RequestMapping(value = "save", method = RequestMethod.GET)
public String save(LoginUser loginUser, Model model) throws Exception {
return "sys/user/edit";
}
//remove = true 用于验证token
@Token(remove = true)
@RequestMapping(value = "save", method = RequestMethod.POST)
public String save(@Valid LoginUser loginUser, Errors errors, RedirectAttributes redirectAttributes, Model model) throws Exception {
//.....
}
jsp页面隐藏域添加token
<input type="hidden" name="token" value="${sessionScope.token}">
拦截器拦截请求,将上一次请求的url和参数和这次的对比
判断,是否一致说明重复提交并记录日志
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface SameUrlData {
}
public class SameUrlDataInterceptor extends HandlerInterceptorAdapter {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
if (handler instanceof HandlerMethod) {
HandlerMethod handlerMethod = (HandlerMethod) handler;
Method method = handlerMethod.getMethod();
//是否有 SameUrlData 注解
SameUrlData annotation = method.getAnnotation(SameUrlData.class);
if (annotation != null) {
if (repeatDataValidator(request)) {//如果重复相同数据
response.sendRedirect("/error/409");
return false;
} else {
return true;
}
}
return true;
} else {
return super.preHandle(request, response, handler);
}
}
/**
* 验证同一个url数据是否相同提交 ,相同返回true
* @param httpServletRequest
* @return
*/
private boolean repeatDataValidator(HttpServletRequest httpServletRequest) {
String params = JsonMapper.toJsonString(httpServletRequest.getParameterMap());
String url = httpServletRequest.getRequestURI();
Map<String, String> map = new HashMap<>();
map.put(url, params);
String nowUrlParams = map.toString();//
Object preUrlParams = httpServletRequest.getSession().getAttribute("repeatData");
if (preUrlParams == null) { //如果上一个数据为null,表示还没有访问页面
httpServletRequest.getSession().setAttribute("repeatData", nowUrlParams);
return false;
} else { //否则,已经访问过页面
if (preUrlParams.toString().equals(nowUrlParams)) { //如果上次url+数据和本次url+数据相同,则表示城府添加数据
return true;
} else { //如果上次 url+数据 和本次url加数据不同,则不是重复提交
httpServletRequest.getSession().setAttribute("repeatData", nowUrlParams);
return false;
}
}
}
}
<mvc:interceptor>
<mvc:mapping path="/**"/>
<bean class="com.chinagdn.base.common.interceptor.SameUrlDataInterceptor"/>
</mvc:interceptor>
使用案例
//在controller层使用 @SameUrlData 注解即可
@SameUrlData
@RequestMapping(value = "save", method = RequestMethod.POST)
public String save(@Valid LoginUser loginUser, Errors errors, RedirectAttributes redirectAttributes, Model model) throws Exception {
//.....
}
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