Topic: jsp连接mysql出错!!!急急急!已经有两天了还没有弄好!!!请各位大虾帮忙 |
Print this page |
1.jsp连接mysql出错!!!急急急!已经有两天了还没有弄好!!!请各位大虾帮忙 | Copy to clipboard |
Posted by: 52dumpling Posted on: 2005-07-24 08:40 testmysql.jsp文件代码如下: <%@ page contentType="text/html;charset=GB2312" %> <%@ page language="java" import="java.sql.*"%> <% java.sql.Connection conn; java.lang.String strConn; Class.forName("org.gjt.mm.mysql.Driver").newInstance(); conn= java.sql.DriverManager.getConnection("jdbc:mysql://192.168.10.2:8080/test","root","admin"); statement stmt=conn.createStatement(); ResultSet rs=null; rs=stmt.executeQuery("select * from test"); %> 放在root目录下运行结果如下: org.apache.jasper.JasperException: Unable to compile class for JSP An error occurred at line: 3 in the jsp file: /testmysql.jsp Generated servlet error: D:\Program Files\Tomcat\work\Catalina\localhost\_\org\apache\jsp\testmysql_jsp.java:50: cannot find symbol symbol : class statement location: class org.apache.jsp.testmysql_jsp statement stmt=conn.createStatement(); ^ 1 error 说明: 我的环境变量设置: classpath .;D:\Program Files\jdk1.5\lib\tools.jar;D:\Program Files\jdk1.5\lib\dt.jar;D:\Program Files\Tomcat\common\lib\servlet-api.jar;D:\Program Files\Tomcat\common\lib\jsp-api.jar;D\Program Files\jdk1.5\lib\mm.mysql-2.0.4-bin.jar path D:\Program Files\jdk1.5\bin;%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;D:\Program Files\MySQL\bin; JAVA_HOME D:\Program Files\jdk1.5\bin CATALINA_HOME D:\Program Files\Tomcat CATALINA_BASE D:\Program Files\Tomcat 用javac运行helloword.java都是正常的 我还把tools.jar和dt.jar都放在tomcat\common\lib 和jdk1.5\lib目录下了 mysql的驱动文件mm.mysql-2.0.4-bin.jar我也同时放在上面两个目录下了 我安装的是jdk1.5+mysql4.1+tomcat5.0.28 |
2.Re:jsp连接mysql出错!!!急急急!已经有两天了还没有弄好!!!请各位大虾帮忙 [Re: 52dumpling] | Copy to clipboard |
Posted by: jimmy14 Posted on: 2005-07-24 09:39 Statement stmt=conn.createStatement(); |
3.Re:jsp连接mysql出错!!!还是出错啊!!! [Re: 52dumpling] | Copy to clipboard |
Posted by: 52dumpling Posted on: 2005-07-24 10:04 谢谢楼上的高手指点: 将statement stmt=conn.createStatement(); 已经改为 Statement stmt=conn.createStatement(); 但是还是出错了;信息如下: type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception javax.servlet.ServletException: Communication link failure: java.io.EOFException org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825) org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758) org.apache.jsp.testmysql_jsp._jspService(testmysql_jsp.java:61) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) root cause java.sql.SQLException: Communication link failure: java.io.EOFException org.gjt.mm.mysql.MysqlIO.init(MysqlIO.java:370) org.gjt.mm.mysql.Connection.connectionInit(Connection.java:261) org.gjt.mm.mysql.jdbc2.Connection.connectionInit(Connection.java:89) org.gjt.mm.mysql.Driver.connect(Driver.java:167) java.sql.DriverManager.getConnection(Unknown Source) java.sql.DriverManager.getConnection(Unknown Source) org.apache.jsp.testmysql_jsp._jspService(testmysql_jsp.java:49) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) 请指点!!!! 为谢!1 |
4.Re:jsp连接mysql出错!!!还是出错啊!!! [Re: 52dumpling] | Copy to clipboard |
Posted by: jimmy14 Posted on: 2005-07-24 13:26 post your whole testmysql.jsp, show how did you read data. |
5.Re:jsp连接mysql出错!!!还是出错啊!!! [Re: jimmy14] | Copy to clipboard |
Posted by: 52dumpling Posted on: 2005-07-24 15:01 testmysql.jsp文件代码如下: 是从网上down 下来的原文件 <%@ page contentType="text/html;charset=GB2312" %> <%@ page language="java" import="java.sql.*"%> <% java.sql.Connection conn; java.lang.String strConn; Class.forName("org.gjt.mm.mysql.Driver").newInstance(); conn= java.sql.DriverManager.getConnection("jdbc:mysql://192.168.10.2:8080/test","root","admin"); statement stmt=conn.createStatement(); ResultSet rs=null; rs=stmt.executeQuery("select * from test"); %> 是按照网上的步骤安装开发环境的,然后就是到了这里testmysql.jsp出了问题了 |
6.Re:jsp连接mysql出错!!!还是出错啊!!! [Re: jimmy14] | Copy to clipboard |
Posted by: sylilzy Posted on: 2005-07-24 15:45 不知你的mysql是什么版本,不过最好不要用旧版的mysql驱动:org.gjt.mm.mysql.Driver,去mysql的网站下最新的驱动mysql-connector-java-3.1.6.zip,用com.mysql.jdbc.Driver连接应该没问题 |
7.Re:jsp连接mysql出错!!!急急急!已经有两天了还没有弄好!!!请各位大虾帮忙 [Re: 52dumpling] | Copy to clipboard |
Posted by: sylilzy Posted on: 2005-07-24 15:47 不好意思,刚才没仔细看你的程序,其中: conn= java.sql.DriverManager.getConnection("jdbc:mysql://192.168.10.2:8080/test","root","admin"); 你应该连接数据库的某个端口,比如:jdbc:mysql://localhost:3306/testdb |
8.Re:jsp连接mysql出错!!!急急急!已经有两天了还没有弄好!!!请各位大虾帮忙 [Re: 52dumpling] | Copy to clipboard |
Posted by: sylilzy Posted on: 2005-07-24 15:48 如果有问题与我联系:sylilzy@163.com |
9.Re:jsp连接mysql出错!!!急急急!已经有两天了还没有弄好!!!请各位大虾帮忙 [Re: sylilzy] | Copy to clipboard |
Posted by: 52dumpling Posted on: 2005-07-24 17:10 谢谢大侠指点。问题已经解决了!!! |
10.Re:jsp连接mysql出错!!!急急急!已经有两天了还没有弄好!!!请各位大虾帮忙 [Re: 52dumpling] | Copy to clipboard |
Posted by: chengbd Posted on: 2005-07-28 12:31 52dumpling,这么多人,说了这么多与你交流。如果你只以“问题已经解决了!!!”作为最后的总结,是不是太简单了,如果别人也这样回答你,让你自己去调试,你的感受如何? 不妨也花费些您的时间,把你解决问题的过程,和问题到底出在哪写出来吧。虽然你也许会觉得这个问题解决的很弱智,不过这样才是更好的交流。 |
11.Re:jsp连接mysql出错!!!急急急!已经有两天了还没有弄好!!!请各位大虾帮忙 [Re: 52dumpling] | Copy to clipboard |
Posted by: 52dumpling Posted on: 2005-07-28 18:59 谢谢楼上的高手指点。真是一语惊醒梦中人。现在才明白任何细小的问题都要认真去对待,努力寻找解决问题的解决方法才能学到知识。 现在将我解决问题的过程介绍如下: 1、第一次按照网上介绍的方法配置后(具体配置及测试文件见顶部帖子),出现以下问题: org.apache.jasper.JasperException: Unable to compile class for JSP An error occurred at line: 3 in the jsp file: /testmysql.jsp Generated servlet error: D:\Program Files\Tomcat\work\Catalina\localhost\_\org\apache\jsp\testmysql_jsp.java:50: cannot find symbol symbol : class statement location: class org.apache.jsp.testmysql_jsp statement stmt=conn.createStatement(); ^ 1 error 后来是jimmy14 指点: 将statement stmt=conn.createStatement(); 改为Statement stmt=conn.createStatement(); 接着又出现如下问题: java.sql.SQLException: Communication link failure: java.io.EOFException org.gjt.mm.mysql.MysqlIO.init(MysqlIO.java:370) org.gjt.mm.mysql.Connection.connectionInit(Connection.java:261) org.gjt.mm.mysql.jdbc2.Connection.connectionInit(Connection.java:89) org.gjt.mm.mysql.Driver.connect(Driver.java:167) java.sql.DriverManager.getConnection(Unknown Source) java.sql.DriverManager.getConnection(Unknown Source) org.apache.jsp.testmysql_jsp._jspService(testmysql_jsp.java:49) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) 按照上面错误的信息来看应该是数据库驱动连接问题 以前的老版本驱动文件mm.mysql-2.0.4-bin.jar已经不适合了,就下载了新的驱动文件:mysql-connector-java-3.1.10-bin.jar 安装后问题才得以解决。 还有一点要说明的就是:网上好多测试文章、配置文章不能完全ctrl+c ctrl+v 必须认认真真的看清楚,里面包含空格、大小写问题、端口问题等等都需要修改的。 在此我要感谢楼上各位的帮助和指点。希望以后能够跟大家一起学习交流。 |
12.Re:jsp连接mysql出错!!!急急急!已经有两天了还没有弄好!!!请各位大虾帮忙 [Re: 52dumpling] | Copy to clipboard |
Posted by: 52dumpling Posted on: 2005-07-28 19:21 学习jsp已经有几天了,现在将我这几天的学习笔记总结如下: 2005年7月24-26日最终设置,运行成功 环境:winxp+jdk1.5+tomcat5.0.28+mysql4.1 说明: 1、安装jdk1.5 2、安装tomcat5.0.28 3、安装mysql4.1 4、配置环境变量(具体如下) 说明:(1、tools.jar和dt.jar均放在tomcat\common\lib下 和jdk1.5\lib下;2、mysql的驱动文件也要同时放在上面两个目录下) classpath .;D:\Program Files\jdk1.5\lib\tools.jar;D:\Program Files\jdk1.5\lib\dt.jar;D:\Program Files\Tomcat\common\lib\servlet-api.jar;D:\Program Files\Tomcat\common\lib\jsp-api.jar;D\Program Files\jdk1.5\lib\mm.mysql-2.0.4-bin.jar path D:\Program Files\jdk1.5\bin;%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;D:\Program Files\MySQL\bin; JAVA_HOME D:\Program Files\jdk1.5\bin CATALINA_HOME D:\Program Files\Tomcat CATALINA_BASE D:\Program Files\Tomcat ********************************************************** classpath增加部分2005.07.25 (mssql2000的jdbc驱动) 在用jsp连接mssql2000测试的时候,出现的问题最多。由于当时没有将问题收录下来,在网上搜索了很多文章才解决的。现在将经验总结如下: 1、断掉网络,先安装mssql 2000 + mssql 2000的jdbc驱动 + mssql 2000的补丁spk3 + mssql 2000的jdbcjdbc驱动的补丁spk 2、找到jdbc驱动文件安装目录下的msutil.jar,msbase.jar,mssqlerver.jar三个文件并分别放在tomcat\common\lib和jdk1.5\lib下面。 3、加入环境变量,重新启动电脑, 我的电脑最终完整的classpath如下(包含mysql及sql2000的驱动程序): .;D:\Program Files\jdk1.5\lib\tools.jar; D:\Program Files\jdk1.5\lib\dt.jar; D:\Program Files\Tomcat\common\lib\servlet-api.jar; D:\Program Files\Tomcat\common\lib\jsp-api.jar; D\Program Files\jdk1.5\lib\mysql-connector-java-3.1.10-bin.jar; D\Program Files\tomcat\common\lib\mysql-connector-java-3.1.10-bin.jar; D:\Program Files\tomcat\common\lib\msutil.jar; D:\Program Files\tomcat\common\lib\msbase.jar; D:\Program Files\tomcat\common\lib\mssqlerver.jar ********************************************************** 测试文件: 1、testmysql.jsp <%@ page contentType="text/html;charset=GB2312" %> <%@ page language="java" import="java.sql.*"%> <% java.sql.Connection conn; java.lang.String strConn; Class.forName("com.mysql.jdbc.Driver").newInstance(); conn= java.sql.DriverManager.getConnection("jdbc:mysql://192.168.10.2:3306/mysql","root","admin"); Statement stmt=conn.createStatement(); ResultSet rs=null; rs=stmt.executeQuery("select * from user"); %> 2、testmssql.jsp <%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*,java.io.*"%> <html> <body> <% Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance(); String url="jdbc:microsoft:sqlserver://192.168.10.2:1433;DatabaseName=pubs"; String user="sa"; String password="admin"; Connection conn=DriverManager.getConnection(url,user,password); Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE); String sql="select job_id,job_desc from jobs"; ResultSet rs=stmt.executeQuery(sql); while(rs.next()){%> 您的第一个字段内容为:<%=rs.getString(1)%><br> 您的第二个字段内容为:<%=rs.getString(2)%><br> <%}%> <%out.print("数据库操作成功,恭喜你");%> <%rs.close(); stmt.close(); conn.close(); %> </body> </html> 以上两个文件都测试通过。 另外,为了方便学习,我从网上下载了不少工具及文件,详细清单如下: 一、JDK 1、j2sdk-1_4_2-windows-i586.exe 42.7M 2、j2sdk1.4.2.exe 52.2M 3、jdk1.5.exe 43.9M 4、jdk-1_5_0_02-nb-4_0-ml-win.exe 102M 二、Tomcat服务器 1、jakarta-tomcat-5.0.28.exe 10M 2、jakarta-tomcat-5.0.30.exe 10.2M 3、jakarta-tomcat-5.5.9.exe 4.29M 三、jboss服务器 jboss-4.0.2.tar.gz 四、mysql数据库及客户端工具 1、mysql-4.0.25-win32.zip 25.1M 2、mysql-4.1.13-win32.zip 37.7M 3、mysql-5.0.9-beta-win32.zip 42M 4、phpmyadmin2.6.0_final.rar 1.04M 5、MySQL-Front_2.5_Setup.exe 1.02M 6、mysql-administrator-1.1.0-rc-win-noinstall.zip 4.21M 7、mysql-query-browser-1.1.13-win-noinstall.zip 4.73M 五、数据库驱动文件 1、mysql-connector-java-3.1.10.zip 6.69M 2、mm.mysql-2.0.4-bin.jar 107K 3、mssql2000 jdbcsetup.exe 1.99M 4、mssql2000 jdbc驱动spk3 2.29M 六、插件 1、tomcatPluginV3.zip 2、lomboz-3.1M6.zip 如有需要,可以与我联系 QQ:106634458 e-mail:iszx@163.com |
Powered by Jute Powerful Forum® Version Jute 1.5.6 Ent Copyright © 2002-2021 Cjsdn Team. All Righits Reserved. 闽ICP备05005120号-1 客服电话 18559299278 客服信箱 714923@qq.com 客服QQ 714923 |