Java 无法创建PoolableConnectionFactory[JSP servlet和MySQL]
我遇到以下错误:java.sql.SQLException:无法创建PoolableConnectionFactory无法打开文件:C:\AppServers\glassfish5\glassfish\domains\domain1/config/keystore.jks[密钥库被篡改,或密码不正确] 通过简单地在MySQL数据库连接上添加useSSL=false,并在DBConnection类中添加JDBC_URL字符串,解决了这个问题 数据库连接 pom.xml 错误Java 无法创建PoolableConnectionFactory[JSP servlet和MySQL],java,mysql,jsp,servlets,glassfish,Java,Mysql,Jsp,Servlets,Glassfish,我遇到以下错误:java.sql.SQLException:无法创建PoolableConnectionFactory无法打开文件:C:\AppServers\glassfish5\glassfish\domains\domain1/config/keystore.jks[密钥库被篡改,或密码不正确] 通过简单地在MySQL数据库连接上添加useSSL=false,并在DBConnection类中添加JDBC_URL字符串,解决了这个问题 数据库连接 pom.xml 错误 您的问题与NullPo
您的问题与NullPointerException无关。您的异常处理很糟糕,您需要修复它,这样您就不会再次感到困惑 问题 您的异常处理方案可以归结为:将一些信息打印到标准输出,然后继续。最后一点就是问题所在:您的代码并不是按照这样的理念编写的:每一行都可能只是做一些事情,或者什么都不做,这取决于是否发生异常。因此,您的代码一直在运行,因为事情没有处于您预期的状态,所以会发生更多的错误,这些错误是完全不相关的-它们不是问题所在,但它们会阻塞日志并使您感到困惑 处理例外情况的正确策略是处理它们。不管怎样,只要把它打印出来,然后继续下去,就不会和他们打交道了。如果你不能处理它们,这是常见的情况,那么就让异常冒出来吧。除非您可以编写解决问题的代码,否则不要捕获它。一个没有任何东西可以处理的异常应该一直冒泡并卷起线程,这是最好的解决方案,也是最少的代码,所以这是一个双赢的结果 显然打算与数据库交互的方法应该声明为抛出SQLException,而您的公共静态void main方法应该声明为抛出Exception,这是允许的 如果你不知何故必须捕获一个检查过的异常,即使你不知道该做什么,那是不好的,那么至少把它放在下面;抛出新的RuntimeExceptionUnhandled,e;在catch块中,而不是'e.printStackTraceSystem.out' 您实际的异常问题 您的mysql驱动程序正在尝试加载损坏的密钥库。这是一个相当棘手的问题 很可能您已经添加了一个配置,或者正在应用一个默认配置,该配置在
C:\AppServers\glassfish5\glassfish\domains\domain1/config/keystore.jks-我认为问题不在于斜杠的混合,java通常对此理解得很好,但我打赌该文件不存在。或者,您试图创建密钥文件,但发生了异常,同样令人遗憾的异常处理导致您没有意识到密钥文件已损坏。检查文件-它可能根本不在那里,或者0字节。重新生成它,或修复配置。我通过在数据库URL中添加useSSL=false来解决问题。它看起来像是一个关闭调用DBConnection.Closer;,DBConnection.closestmt;或DBConnection.closeconn;正在将null对象传递给close方法`调试代码以确定哪一个为null,以及它为什么为null是否已关闭?然后检查null或捕获null并采取措施解决它。只是想检查一下,您的代码是否真的从数据库中获取了用户?堆栈跟踪的其余部分在哪里?很可能try块中的某个内容抛出,导致rs或stmt甚至conn为null,并在finally块中抛出NPE。我们需要查看完整的堆栈跟踪。始终包含完整的堆栈跟踪。@Sorifind我标记了一个调试点,但当我在调试模式下运行web应用时,我无法前进任何一行。不知道如何搜索空值。@JimGarrison我刚刚添加了完整的堆栈跟踪。抱歉,这个问题与您的代码无关,NPE只是一个更严重问题的副作用,Java不喜欢您作为密钥库提供的文件。从这里开始。非常感谢你的回答。我找到了这个文件,它有5KB,所以我可以说它不是空的。我读到GlassFish有时会在一些版本中将默认密码从changeme更改为changeit。我看不懂这个文件,不知道怎么读。我还没有找到如何编辑它。难得的是,我有另一个web应用程序具有类似的代码,工作正常,使用完全相同的过程创建。它在JDK发行版中的keytool工具,位于jar和javac旁边,可以使用。在网上搜索有关如何调用它的教程。这是一个命令行工具。
package data;
import java.sql.*;
import javax.sql.DataSource;
import org.apache.commons.dbcp2.BasicDataSource;
public class DBConnection {
private static final String JDBC_URL = "jdbc:mysql://localhost:3306/course_management_system?zeroDateTimeBehavior=CONVERT_TO_NULL&useTimezone=true&serverTimezone=UTC";
private static final String JDBC_USER = "root";
private static final String JDBC_PASSWORD = "admin";
private static BasicDataSource dataSource;
public static DataSource getDataSource() {
if (dataSource == null) {
dataSource = new BasicDataSource();
dataSource.setUrl(JDBC_URL);
dataSource.setUsername(JDBC_USER);
dataSource.setPassword(JDBC_PASSWORD);
dataSource.setInitialSize(50);
try {
Class.forName("com.mysql.cj.jdbc.Driver");
} catch (ClassNotFoundException ex) {
ex.printStackTrace(System.out);
}
}
return dataSource;
}
public static Connection getConnection() throws SQLException {
return getDataSource().getConnection();
}
public static void close(ResultSet rs) {
try {
rs.close();
} catch (SQLException ex) {
ex.printStackTrace(System.out);
}
}
public static void close(PreparedStatement stmt) {
try {
stmt.close();
} catch (SQLException ex) {
ex.printStackTrace(System.out);
}
}
public static void close(Connection conn) {
try {
conn.close();
} catch (SQLException ex) {
ex.printStackTrace(System.out);
}
}
}
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>mb</groupId>
<artifactId>CourseManagementSystem</artifactId>
<version>1.0</version>
<packaging>war</packaging>
<name>CourseManagementSystem</name>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<failOnMissingWebXml>false</failOnMissingWebXml>
<jakartaee>8.0</jakartaee>
</properties>
<dependencies>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>${jakartaee}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.22</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>2.8.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<compilerArguments>
<endorseddirs>${endorsed.dir}</endorseddirs>
</compilerArguments>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.6</version>
<executions>
<execution>
<phase>validate</phase>
<goals>
<goal>copy</goal>
</goals>
<configuration>
<outputDirectory>${endorsed.dir}</outputDirectory>
<silent>true</silent>
<artifactItems>
<artifactItem>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>${jakartaee}</version>
<type>jar</type>
</artifactItem>
</artifactItems>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
CourseManagementSystem was successfully deployed in 316 milliseconds.|#]
java.sql.SQLException: Cannot create PoolableConnectionFactory (Cannot open file:C:\AppServers\glassfish5\glassfish\domains\domain1/config/keystore.jks [Keystore was tampered with, or password was incorrect])
at org.apache.commons.dbcp2.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:656)
at org.apache.commons.dbcp2.BasicDataSource.createDataSource(BasicDataSource.java:534)
at org.apache.commons.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:734)
at data.DBConnection.getConnection(DBConnection.java:35)
at data.UserDAO.list(UserDAO.java:30)
at web.UserController.doGet(UserController.java:18)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:645)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:750)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1540)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:217)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:119)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:611)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:550)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:114)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:332)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:199)
at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:463)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:168)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:206)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:180)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:242)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:539)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:593)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:573)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.sql.SQLNonTransientConnectionException: Cannot open file:C:\AppServers\glassfish5\glassfish\domains\domain1/config/keystore.jks [Keystore was tampered with, or password was incorrect]
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:110)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:70)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:833)
at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:453)
at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246)
at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:198)
at org.apache.commons.dbcp2.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:52)
at org.apache.commons.dbcp2.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:357)
at org.apache.commons.dbcp2.BasicDataSource.validateConnectionFactory(BasicDataSource.java:103)
at org.apache.commons.dbcp2.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:652)
... 35 more
Caused by: com.mysql.cj.exceptions.SSLParamsException: Cannot open file:C:\AppServers\glassfish5\glassfish\domains\domain1/config/keystore.jks [Keystore was tampered with, or password was incorrect]
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151)
at com.mysql.cj.protocol.ExportControlled.getSSLContext(ExportControlled.java:550)
at com.mysql.cj.protocol.ExportControlled.performTlsHandshake(ExportControlled.java:303)
at com.mysql.cj.protocol.StandardSocketFactory.performTlsHandshake(StandardSocketFactory.java:188)
at com.mysql.cj.protocol.a.NativeSocketConnection.performTlsHandshake(NativeSocketConnection.java:97)
at com.mysql.cj.protocol.a.NativeProtocol.negotiateSSLConnection(NativeProtocol.java:333)
at com.mysql.cj.protocol.a.NativeAuthenticationProvider.connect(NativeAuthenticationProvider.java:167)
at com.mysql.cj.protocol.a.NativeProtocol.connect(NativeProtocol.java:1350)
at com.mysql.cj.NativeSession.connect(NativeSession.java:157)
at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:953)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:823)
... 42 more
Caused by: java.io.IOException: Keystore was tampered with, or password was incorrect
at sun.security.provider.JavaKeyStore.engineLoad(JavaKeyStore.java:782)
at sun.security.provider.JavaKeyStore$JKS.engineLoad(JavaKeyStore.java:56)
at sun.security.provider.KeyStoreDelegator.engineLoad(KeyStoreDelegator.java:224)
at sun.security.provider.JavaKeyStore$DualFormatJKS.engineLoad(JavaKeyStore.java:70)
at java.security.KeyStore.load(KeyStore.java:1445)
at com.mysql.cj.protocol.ExportControlled.getSSLContext(ExportControlled.java:530)
... 51 more
Caused by: java.security.UnrecoverableKeyException: Password verification failed
at sun.security.provider.JavaKeyStore.engineLoad(JavaKeyStore.java:780)
... 56 more
|#]
StandardWrapperValve[web.UserController]: Servlet.service() for servlet web.UserController threw exception
java.lang.NullPointerException
at data.DBConnection.close(DBConnection.java:40)
at data.UserDAO.list(UserDAO.java:51)
at web.UserController.doGet(UserController.java:18)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:645)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:750)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1540)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:217)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:119)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:611)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:550)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:114)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:332)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:199)
at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:463)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:168)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:206)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:180)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:242)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:539)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:593)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:573)
at java.lang.Thread.run(Thread.java:748)
|#]