XE420GK液压挖掘机是我公司一款高端配置高效率作业能力的新产品。拥有5项核心技术，采用我公司自主研发的液压控制系统，搭载大排量主泵，低速大扭矩发动机，全新舒适性驾驶室，客户体验极佳，广泛适应于土石方作业、大型基建工程等工程建设。
康明斯发动机，低速大扭矩输出，满足重载模式下动力输出与油耗的动态平衡与经济性，功率储备足，满足海拔5000m施工需求；
进口大规格主阀，压力损失小、响应速度快、流量分配更合理；
标配加长、加强型底盘系统，矿山工作稳定性更好，可靠性更高，四轮一带采用加强型四轮一带，保证矿山等恶劣工况下的使用寿命；
采用大箱体工作装置，运用有限元分析，对动臂、斗杆上关键部位进行加强；
散热器采用高性能复合翅片、新型铅锡焊接工艺，散热效率提升，节能降噪，环境温度适应性可至50℃。
Type Exception Report
Message An exception occurred processing [/guosi/include/pro_detail_comment.jsp] at line [52]
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
org.apache.jasper.JasperException: An exception occurred processing [/guosi/include/pro_detail_comment.jsp] at line [52]
49: String url = "http://koubei.21-sun.com/detail/"+id+".htm";
50: String add_date = CommonString.getFormatPara(CommonDate.getFormatDate("yyyy-MM-dd",m.getFieldValue("add_date")));
51: int randomInt = random.nextInt(10000)%citys.length;
52: String rProvince=citys[randomInt-1];
53: if(rProvince.equals("")||rProvince==null){
54: rProvince="山东";
55: }
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:610)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:499)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:379)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:327)
javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
com.jerehnet.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:121)
Root Cause
java.lang.ArrayIndexOutOfBoundsException: -1 org.apache.jsp.guosi.include.pro_005fdetail_005fcomment_jsp._jspService(pro_005fdetail_005fcomment_jsp.java:202) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet.java:764) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:466) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:379) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:327) javax.servlet.http.HttpServlet.service(HttpServlet.java:764) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) com.jerehnet.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:121)
Note The full stack trace of the root cause is available in the server logs.