HTTP Status 500 - An exception occurred processing JSP page /register_post.jsp at line 44哪错了_百度知道
HTTP Status 500 - An exception occurred processing JSP page /register_post.jsp at line 44哪错了
String userPassword=request.checklogin(CheckLogin.println(&quot: org:334) javax.java.JasperException.jasper.service(HttpJspBase:
out:727)note The full stack trace of the root cause is available in the Apache Tomcat&#47:
{47.servlet.JspS).将获取到的用户登录信息与数据库中保存的用户信息进行比较44.jasper:568) org.apache.servlet.jasper.java.service(HttpServlet.service(JspServlet.servlet.apache.JspServlet:
String loginMsg = check,userPassword).apache.java.jsp at line 44description The server encountered an internal error that prevented it from fulfilling this request.java.jsptype Exception reportmessage An exception occurred processing JSP page &#47.jasper:70) javax.runtime.42.45;SUCCESS_LOGIN&quot.apache:432) org.jasper.java.JspServletWrapper.CheckLogin.HttpServlet.java.
Stacktrace:727)root cause))46.53 logs.java.servlet.register_005fpost_jsp.http.JspS).serviceJspFile(JspServlet.HttpServlet.java.java.JspServletWrapper:
43.apache，请重新选择用户名&quot.jasper:727) org.service(JspServletWrapper.java:
/&#47.java:470) org.JspServlet.该用户已经存在.checklogin(nickName.servlet:334) javax.HttpJspBase._jspService(register_005fpost_register_post.getParameter(&quot: An exception occurred processing JSP page &#47:60) org.NullPointerException com.serviceJspFile(JspServlet:390) org.service(HttpServlet:118) org.apache.servlet.java.apache.apache:390) org.jsp at line 4441;register_post.http.jasper.apache.service(HttpServlet.userPassword&quot.JspServletWrapper:
if(loginMsg.service(JspServlet.handleJspException(JspServletWrapper.servlet.HttpServlet.exceptionorg.service(JspServletWrapper.equals(&quot.apache.7.0.servlet
提问者采纳
根据com,userPassword),userPassword为空2.CheckLogin，再慢慢解决~:60)表示执行下面语句时:60)看看对应行代码是多少个人估计.checklogin()使用到了其他空的变量先定位问题.CheckLogin.java.lang.checklogin(nickName：1 可能是参数nickName，进入到checklogin方法.java.NullPointerException com.checklogin(CheckLoginroot causejava.checklogin(CheckLogin，有空值异常String loginMsg = check
解决不了了，打算买一份，你那有读书网站的项目吗
没有，现在报什么错误
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出门在外也不愁运行jsp出现错误HTTP Status 500_百度知道
运行jsp出现错误HTTP Status 500
service(JspServlet.doHandlePageException(PageContextImpl.jsp at line 63: org.servlet.Properties&quot.HttpS&gt.JasperException.java.servlet.jasper.apache.jasper.HttpJspBase.jasper.HttpS&#47.%@ page import=&quot.HttpServlet.apache.servlet:260) javax.lang.jasper.http:70) javax: 5.java.apache:313) org.http.http.apache.JspServlet!9.service(JspSmypack.JspServletW %&gt.7.runtime:144) org.ServletException: java.java.apache.jsp.JspServlet.PageContextImpl.jasper.jasper:260) javax.BookDB&common.BookDB org.service(JspServletWrapper.serviceJspFile(JspServlet.HttpJspBase: An exception occurred processing JSP page &#47.JspServletW6.jasper:70) javax.java.java.runtime.JspServletWrapper.java.java.jasper.servlet._jspService(check_jsp.serviceJspFile(JspServlet.servlet.jsp: 6.JspServlet.apache.check_jsp: Could not initialize class mypack:717)note The full stack trace of the root cause is available in the Apache Tomcat&#47:794) org.util.apache.http.java.check_jsp.NoClassDefFoundError.PageContextImpl: &lt.jasper.apache.java: 8.servlet.java.servlet:386) org.service(JspServletWrapper:410) bookDB&quot.handlePageException(PageContextImpl.jasper.service(HttpJspBase:useBean id=&quot.servlet.JspServlet.java.jasper:313) org.apache: &lt.java:79) 4.service(HttpServlet:386)
class=&quot.serviceJspFile(JspServlet.service(HttpServlet:519) java.HttpServlet:717) org.java.runtime.apache.java.jasper.apache:
public String convert(String s){Stacktrace.servlet.JspServlet.30 logs.apache._jspService(check_jsp:717)root cause javax: &lt: Could not initialize class mypack.jasper.servlet.handleJspException(JspServletWrapper.service(JspServletWrapper:260) javax.apache:717)root cause java.HttpServlet.servlet.java.apache.service(JspServlet.java. scope=&quot.jasper.JspServlet.service(HttpJspBase.NoClassDefFoundError.java.0.service(HttpS%.jasper.java:313) org.lang.servlet.JspServletWrapper:865) org.servlet:717) org.java.http.servlet.BookDB org.jsp.service(HttpServlet.service(HttpServlet.apache.application&quot.servlettype Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.servlet.exception org
ublic class BookDB {
private static SessionFactory sessionFactory.
} catch (Throwable ex) {
return (User) session.openSession();
public static SessionFactory getSessionFactory() {
return sessionFactory.err.println(&Initial SessionFactory creation failed.openSession(), uname).& + ex);
throw new ExceptionInInitializerError(ex);
public static Session getSession(){
return sessionFactory.load(U
public User getUser(String uname) {
Session session = getSessionFactory();
private BookDB(){}
sessionFactory = new Configuration().configure().buildSessionFactory()
提问者采纳
保留 cglib-nodep.jar试试，也可能是jar对应包的版本比如cglib-nodep-2.1_3.jar 对应spring的 版本是2。.可能是jar包的冲突.5.jar。删除cglib。
我只有一个cglib-2.1.3.jar
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其他1条回答
BookDB类。确定工程中有这个类吗: Could not initialize class mypack.NoClassDefFoundError？ BookDB 是在mypack下吗.BookDB都说了无法初始化mypack，就是找不到这个类了java.lang
确定啊 BookDB就是在源包里的mypack下的
private BookDB(){}构造函数是私有的，无法初始化
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出门在外也不愁求帮忙看看如何解决这个错误，急求，不胜感激。_百度知道
求帮忙看看如何解决这个错误，急求，不胜感激。
340) piler.jasper.service(JspServletWrapper.servlet:378) piler.java.java.jasper:646) org.generateClass(JDTCtomcat-7&#92.pile(Compiler: [D:103) piler.JasperException.apache.servlet.jasper.JspCompilationContext.java.java.java.apache:357) org:390) org:typeException reportmessageUnable to compile class for JSP.JspServlet.jasper:468) org.Catalina&#piler.apache: [14] in the generated java file.jsp&#92.servlet.HttpServlet.apache: Unable to compile class for JSP.java] Only a work&#92.javacError(DefaultErrorHandler.37 logs.pile(Compiler: An Clothes&#92.checkLogin_jsp.mysql.jasper.org&#92.apache.javacError(ErrorDispatcher.JspServlet.7: org.apache&#92.apache.service(JspServlet:&#92.jdbc.0;localhost&#92. com.DefaultErrorHandler.java.jasper:331) org.serviceJspFile(JspServlet.apache:728) noteThe full stack trace of the root cause is available in the Apache Tomcat&#47.compile(pile(JspCompilationContext.jasper.Driver resolves to a piler.java.apache.service(HttpServlet.jasper:334) javax.servlet:353) org:descriptionThe server encountered an internal error that prevented it from fulfilling this request.apache.exceptionorgHTTP Status 500 - Unable to compile class for JSP
表名String url = &;localhost/ /;/ /数据库用户名String userPasswd = &%&String password = AND password='String driverName = &quot.*&第14行} catch (ClassNotFoundException e) {root&+ userName + &/ + dbName + & / &#47.&#47.clothes&quot.forName(&quot.Driver&quot:mysql：&密码String dbName = &java.getParameter(& + userP/原页面代码如下; + password + &' //%String logname = request:&#47.println(e);/数据库名String tableName = &联结字符串try {CString sql = &users&%&).println(e).createStatement();com.Driver&ResultSet rs =+ logname + &}try {Connection con = DriverM);logname&quot.);}%&gt.getParameter(&quot.jdbc.jdbc.&&%@ page contentType=&&password=&.getConnection(url);Statement statement =&驱动程序名String userName = &&/&%@ page import=&quot?user=&text/ charset=utf-8&password&.%@ page import=&quot.executeQuery(sql);&'; /; /SELECT * FROM users where logname ='%&/&&quot.Driver& } catch (SQLException e) {out
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你的out.println的out是哪里来的，有定义吗？
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I am attempting to return the count of mysql rows. I get the following error when I run the .jsp file:
org.apache.jasper.JasperException: An exception occurred processing
JSP page /index.jsp at line 54
Which is this line of code:
// count posts in category 1
catCount = conn.countCategoryPosts(1);
I know the database connection is setup fine.
This is the countCategoryPosts method.
public int countCategoryPosts(int ncatID) throws Exception{
int catID = ncatID;
sql = "SELECT COUNT(*) FROM crm_posts WHERE cat_id = ?";
prep = conn.prepareStatement(sql);
prep.setInt(1, catID);
rs = prep.executeQuery();
}catch(Exception e){
e.printStackTrace();
return rs.getInt(1);
What is causing the error?
EDIT: As requested the full stacktrace:
type Exception report
message An exception occurred processing JSP page /index.jsp at line 54
description The server encountered an internal error that prevented it from fulfilling this request.
org.apache.jasper.JasperException: An exception occurred processing JSP page /index.jsp at line 54
id = Integer.parseInt(catAttributes[1]);
// count posts in this category
catCount = conn.countCategoryPosts(1);
// get posts in this category
postList = conn.getCategoryPosts(id);
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:568)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:455)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)
org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:394)
root cause
javax.servlet.ServletException: java.sql.SQLException: Before start of result set
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:916)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:845)
org.apache.jsp.index_jsp._jspService(index_jsp.java:208)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)
org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:394)
root cause
java.sql.SQLException: Before start of result set
com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1084)
com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987)
com.mysql.jdbc.SQLError.createSQLException(SQLError.java:973)
com.mysql.jdbc.SQLError.createSQLException(SQLError.java:918)
com.mysql.jdbc.ResultSetImpl.checkRowPos(ResultSetImpl.java:850)
com.mysql.jdbc.ResultSetImpl.getInt(ResultSetImpl.java:2705)
com.servlet.explore.dbCon.countCategoryPosts(dbCon.java:103)
org.apache.jsp.index_jsp._jspService(index_jsp.java:145)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)
org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:394)
1,37083063
You can not call
rs.getInt(1)
if you did not move your cursor with
rs.next() // for example
This should work:
public int countCategoryPosts(int ncatID) throws Exception{
int catID = ncatID;
int result = 0;
sql = "SELECT COUNT(*) FROM crm_posts WHERE cat_id = ?";
prep = conn.prepareStatement(sql);
prep.setInt(1, catID);
rs = prep.executeQuery();
if (rs.next()) {
result = rs.getInt(1);
}catch(Exception e){
e.printStackTrace();
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