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package com.dsideal.resource.Interceptor;
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import com.dsideal.resource.Util.CommonUtil;
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import com.jfinal.aop.Interceptor;
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import com.jfinal.aop.Invocation;
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import com.jfinal.core.Controller;
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/**
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* 检查是不是符合layui的分页查询规则
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*
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* @author Administrator
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*/
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public class LayUiPageInfoInterceptor implements Interceptor {
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@Override
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public void intercept(Invocation inv) {
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LayUiPageInfoInterface annotation = inv.getMethod().getAnnotation(LayUiPageInfoInterface.class);
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if (annotation != null) {
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checkLayUiPageInfo(annotation, inv);
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} else {
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inv.invoke();
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}
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}
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public void checkLayUiPageInfo(LayUiPageInfoInterface annotation, Invocation inv) {
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Controller con = inv.getController();
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String header = con.getHeader("Content-Type"); //取出head头
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if (header != null && header.indexOf("multipart/form-data") != -1) { //判断是否是form-data
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inv.invoke();
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}
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String[] value = annotation.value();
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String o_page = null;
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String o_limit = null;
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for (String v : value) {
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String parameter = con.getPara(v);
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if (v.equals("page")) {
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o_page = parameter;
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}
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if (v.equals("limit")) {
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o_limit = parameter;
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}
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}
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if (o_page != null && o_limit != null) {
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if (!CommonUtil.isNumeric(o_page)) {
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con.renderJson(CommonUtil.returnMessageJson(false, "传入的page参数不是数字！"));
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}
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if (!CommonUtil.isNumeric(o_limit)) {
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con.renderJson(CommonUtil.returnMessageJson(false, "传入的limit参数不是数字！"));
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}
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//检查大小
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int page = Integer.parseInt(o_page);
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int limit = Integer.parseInt(o_limit);
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if (limit > 100) {
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con.renderJson(CommonUtil.returnMessageJson(false, "传入的limit参数大于100，被禁止！"));
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}
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if (limit < 1) {
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con.renderJson(CommonUtil.returnMessageJson(false, "传入的limit参数小于1，被禁止！"));
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}
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//放行
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inv.invoke();
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} else if (o_page == null) {
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con.renderJson(CommonUtil.returnMessageJson(false, "传入的page参数为空！"));
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} else if (o_limit == null) {
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con.renderJson(CommonUtil.returnMessageJson(false, "传入的limit参数为空！"));
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}
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}
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}
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