java.lang.IndexOutOfBoundsException: Index: 12, Size: 12 如题

Question

首先我知道是越界，关键怎么解决，跪求高手！在线等
严重: Servlet.service() for servlet jsp threw exception
java.lang.IndexOutOfBoundsException: Index: 12, Size: 12
at java.util.ArrayList.RangeCheck(Unknown Source)
at java.util.ArrayList.get(Unknown Source)
at org.apache.jsp.NewProducts_jsp._jspService(NewProducts_jsp.java:335)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:654)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:445)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:379)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:292)
at com.fz.control.productsClServlet.doGet(productsClServlet.java:47)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
2011-3-15 12:28:58 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet productsClServlet threw exception
java.lang.IndexOutOfBoundsException: Index: 12, Size: 12
at java.util.ArrayList.RangeCheck(Unknown Source)
at java.util.ArrayList.get(Unknown Source)
at org.apache.jsp.NewProducts_jsp._jspService(NewProducts_jsp.java:335)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:654)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:445)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:379)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:292)
at com.fz.control.productsClServlet.doGet(productsClServlet.java:47)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)

Answer 1

size 为 12 的话，那 index 最多只能是 11，要是强行访问 12 的话就会抛出这个数组越界的异常。

Answer 2

要是用循环访问数组的话，把“<=”改成“<”

Answer 3

NewProducts_jsp.java:335
看这个，仔细检查下代码，数组的应该不多，不急，细心点

Answer 4

要么改 循环的最大参数, 要么就将运算符由<=改为< 上面说的都是对的

Answer 5

debug调试，看哪里写的有问题

Answer 6

java.lang.IndexOutOfBoundsException: Index: 12, Size: 12下标啊，越界了，下标最大11

Answer 7

com.fz.control.productsClServlet.doGet(productsClServlet.java:47)
debug你这个servlet的47行代码

Answer 8

出错的servlet代码：二楼说我越界Arraylist怎么越界的，我更本没有用数组 而且打印出Arraylist里面的结果是对的，没有十三个数据，只有十二个
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException { response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
PrintWriter out = response.getWriter();
String operate=request.getParameter("operate");
if(operate.equals("Details"))
{
String productsId=request.getParameter("id");
productBean pb=new productBean();
productsBeanBO pbbo=new productsBeanBO();
pb=pbbo.getProductBean(productsId);
request.setAttribute("productDetails", pb);
request.getRequestDispatcher("ProductDetails.jsp").forward(request, response);
}else if(operate.equals("moreNew"))
{

String s_pageNow=request.getParameter("pageNow");
System.out.println(s_pageNow);
request.setAttribute("pageNow", s_pageNow);
    request.getRequestDispatcher("NewProducts.jsp").forward(request, response);


}

Answer 9

恩 数组length和下标要弄清