急！JSP操作SqlServer2000数据库问题
这个是操作数据库的代码
程序代码：import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class DB {
private final String url = "jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=Blog";
private final String userName = "sa";
private final String password = "sa";
private Connection con = null;
private Statement stm=null;
/* 通过构造方法加载数据库驱动 */
public DB(){
try {
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();
} catch (Exception e) {
e.printStackTrace();
System.out.println("加载数据库驱动失败！");
}
}
/* 创建数据库连接 */
public void createCon() {
try {
con = DriverManager.getConnection(url, userName, password);
} catch (Exception e) {
e.printStackTrace();
System.out.println("获取数据库连接失败！");
}
}
/* 获取Statement对象 */
public void getStm(){
createCon();
try {
stm=con.createStatement();
} catch (SQLException e) {
e.printStackTrace();
System.out.println("创建Statement对象失败！");
}
}
/**
* @功能 对数据库的增加、修改和删除的操作
* @参数 sql为要执行的SQL语句
* @返回值 boolean型值
*/
public boolean executeUpdate(String sql) {
System.out.println(sql);
boolean mark=false;
try {
getStm();
int iCount = stm.executeUpdate(sql);
if(iCount>0)
mark=true;
else
mark=false;
} catch (Exception e) {
e.printStackTrace();
mark=false;
}
return mark;
}
/* 查询数据库 */
public ResultSet executeQuery(String sql) {
ResultSet rs=null;
try {
getStm();
try {
rs = stm.executeQuery(sql);
} catch (Exception e) {
e.printStackTrace();
System.out.println("查询数据库失败！");
}
} catch (Exception e) {
e.printStackTrace();
}
return rs;
}
/* 关闭数据库的操作 */
public void closed() {
if(stm!=null)
try {
stm.close();
} catch (SQLException e) {
e.printStackTrace();
System.out.println("关闭stm对象失败！");
}
if(con!=null)
try {
con.close();
} catch (SQLException e) {
e.printStackTrace();
System.out.println("关闭con对象失败！");
}
}
}
这个是控制台信息
程序代码：2009-12-23 23:34:08 org.apache.catalina.core.AprLifecycleListener init
信息: The Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: D:\Program Files\Genuitec\Common\binary\com.sun.java.jdk.win32.x86_1.6.0.013\bin;d:\Program Files\Genuitec\Common\plugins\com.genuitec.eclipse.easie.tomcat.myeclipse_7.5.0.zmyeclipse75020090612\tomcat\bin
2009-12-23 23:34:09 org.apache.coyote.http11.Http11Protocol init
严重: Error initializing endpoint
Address already in use: JVM_Bind:8080
at org.apache.tomcat.(JIoEndpoint.java:501)
at org.apache.coyote.http11.Http11Protocol.init(Http11Protocol.java:177)
at org.apache.catalina.connector.Connector.initialize(Connector.java:1059)
at org.apache.catalina.core.StandardService.initialize(StandardService.java:677)
at org.apache.catalina.core.StandardServer.initialize(StandardServer.java:792)
at org.apache.catalina.startup.Catalina.load(Catalina.java:518)
at org.apache.catalina.startup.Catalina.load(Catalina.java:538)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:260)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:412)
2009-12-23 23:34:09 org.apache.catalina.startup.Catalina load
严重: Catalina.start
LifecycleException: Protocol handler initialization failed: Address already in use: JVM_Bind:8080
at org.apache.catalina.connector.Connector.initialize(Connector.java:1061)
at org.apache.catalina.core.StandardService.initialize(StandardService.java:677)
at org.apache.catalina.core.StandardServer.initialize(StandardServer.java:792)
at org.apache.catalina.startup.Catalina.load(Catalina.java:518)
at org.apache.catalina.startup.Catalina.load(Catalina.java:538)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:260)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:412)
2009-12-23 23:34:09 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 1180 ms
2009-12-23 23:34:09 org.apache.catalina.core.StandardService start
信息: Starting service Catalina
2009-12-23 23:34:09 org.apache.catalina.core.StandardEngine start
信息: Starting Servlet Engine: Apache Tomcat/6.0.13
2009-12-23 23:34:11 org.apache.coyote.http11.Http11Protocol start
严重: Error starting endpoint
Address already in use: JVM_Bind:8080
at org.apache.tomcat.(JIoEndpoint.java:501)
at org.apache.tomcat.(JIoEndpoint.java:515)
at org.apache.coyote.http11.Http11Protocol.start(Http11Protocol.java:204)
at org.apache.catalina.connector.Connector.start(Connector.java:1132)
at org.apache.catalina.core.StandardService.start(StandardService.java:531)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:566)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
2009-12-23 23:34:11 org.apache.catalina.startup.Catalina start
严重: Catalina.start:
LifecycleException: service.getName(): "Catalina"; Protocol handler start failed: Address already in use: JVM_Bind:8080
at org.apache.catalina.connector.Connector.start(Connector.java:1139)
at org.apache.catalina.core.StandardService.start(StandardService.java:531)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:566)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
2009-12-23 23:34:11 org.apache.catalina.startup.Catalina start
信息: Server startup in 1973 ms
2009-12-23 23:34:11 org.apache.catalina.core.StandardServer await
严重: StandardServer.await: create[8005]:
Address already in use: JVM_Bind
at (Native Method)
at (PlainSocketImpl.java:359)
at (ServerSocket.java:319)
at (ServerSocket.java:185)
at org.apache.catalina.core.StandardServer.await(StandardServer.java:373)
at org.apache.catalina.startup.Catalina.await(Catalina.java:630)
at org.apache.catalina.startup.Catalina.start(Catalina.java:590)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
java.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC]Error establishing socket.
at com.microsoft.jdbc.base.BaseExceptions.createException(Unknown Source)
at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)
at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)
at com.microsoft.jdbc.sqlserver.tds.TDSConnection.<init>(Unknown Source)
at com.microsoft.jdbc.sqlserver.SQLServerImplConnection.open(Unknown Source)
at com.microsoft.jdbc.base.BaseConnection.getNewImplConnection(Unknown Source)
at com.microsoft.jdbc.base.BaseConnection.open(Unknown Source)
at com.microsoft.jdbc.base.BaseDriver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
at com.yxq.toolsbean.DB.createCon(DB.java:28)
at com.yxq.toolsbean.DB.getStm(DB.java:36)
at com.yxq.toolsbean.DB.executeQuery(DB.java:69)
at com.yxq.dao.LogonDao.getMaster(LogonDao.java:20)
at com.yxq.servlet.IndexServlet.<clinit>(IndexServlet.java:68)
at sun.misc.Unsafe.ensureClassInitialized(Native Method)
at sun.reflect.UnsafeFieldAccessorFactory.newFieldAccessor(UnsafeFieldAccessorFactory.java:25)
at sun.reflect.ReflectionFactory.newFieldAccessor(ReflectionFactory.java:122)
at java.lang.reflect.Field.acquireFieldAccessor(Field.java:918)
at java.lang.reflect.Field.getFieldAccessor(Field.java:899)
at java.lang.reflect.Field.set(Field.java:657)
at org.apache.catalina.loader.WebappClassLoader.clearReferences(WebappClassLoader.java:1615)
at org.apache.catalina.loader.WebappClassLoader.stop(WebappClassLoader.java:1495)
at org.apache.catalina.loader.WebappLoader.stop(WebappLoader.java:707)
at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4534)
at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:924)
at org.apache.catalina.startup.HostConfig.undeployApps(HostConfig.java:1180)
at org.apache.catalina.startup.HostConfig.stop(HostConfig.java:1151)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:313)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1086)
at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1098)
at org.apache.catalina.core.StandardEngine.stop(StandardEngine.java:448)
at org.apache.catalina.core.StandardService.stop(StandardService.java:584)
at org.apache.catalina.core.StandardServer.stop(StandardServer.java:744)
at org.apache.catalina.startup.Catalina.stop(Catalina.java:616)
at org.apache.catalina.startup.Catalina$CatalinaShutdownHook.run(Catalina.java:659)
获取数据库连接失败！
java.lang.NullPointerException
at com.yxq.toolsbean.DB.getStm(DB.java:38)
at com.yxq.toolsbean.DB.executeQuery(DB.java:69)
at com.yxq.dao.LogonDao.getMaster(LogonDao.java:20)
at com.yxq.servlet.IndexServlet.<clinit>(IndexServlet.java:68)
at sun.misc.Unsafe.ensureClassInitialized(Native Method)
at sun.reflect.UnsafeFieldAccessorFactory.newFieldAccessor(UnsafeFieldAccessorFactory.java:25)
at sun.reflect.ReflectionFactory.newFieldAccessor(ReflectionFactory.java:122)
at java.lang.reflect.Field.acquireFieldAccessor(Field.java:918)
at java.lang.reflect.Field.getFieldAccessor(Field.java:899)
at java.lang.reflect.Field.set(Field.java:657)
at org.apache.catalina.loader.WebappClassLoader.clearReferences(WebappClassLoader.java:1615)
at org.apache.catalina.loader.WebappClassLoader.stop(WebappClassLoader.java:1495)
at org.apache.catalina.loader.WebappLoader.stop(WebappLoader.java:707)
at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4534)
at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:924)
at org.apache.catalina.startup.HostConfig.undeployApps(HostConfig.java:1180)
at org.apache.catalina.startup.HostConfig.stop(HostConfig.java:1151)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:313)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1086)
at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1098)
at org.apache.catalina.core.StandardEngine.stop(StandardEngine.java:448)
at org.apache.catalina.core.StandardService.stop(StandardService.java:584)
at org.apache.catalina.core.StandardServer.stop(StandardServer.java:744)
at org.apache.catalina.startup.Catalina.stop(Catalina.java:616)
at org.apache.catalina.startup.Catalina$CatalinaShutdownHook.run(Catalina.java:659)
这个是页面中显示的内容
程序代码：HTTP Status 500 -
--------------------------------------------------------------------------------
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: java.lang.NullPointerException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:541)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:435)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
java.lang.NullPointerException
com.yxq.dao.FriendDao.queryFriend(FriendDao.java:47)
com.yxq.servlet.IndexServlet.doPost(IndexServlet.java:52)
com.yxq.servlet.IndexServlet.doGet(IndexServlet.java:25)
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:694)
org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:665)
org.apache.jsp.index_jsp._jspService(index_jsp.java:56)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.13 logs.
--------------------------------------------------------------------------------
Apache Tomcat/6.0.13
本人新手，错误一直调试不好，麻烦各位大大帮忙看看。急死人了~
[ 本帖最后由 swehenry 于 2009-12-23 23:56 编辑 ]
恳求各位大大帮忙找找错误，整了一天了