Tomcat 连接池 - java.lang.UnsupportedOperationException：BasicDataSource 不支持

Question

我已经尝试使用 C3po 库进行连接池，但我的代码出现了诸如 abstractMethodError() 之类的错误，然后我决定使用 tomcat 池。现在我得到一个

    java.lang.UnsupportedOperationException: Not supported by BasicDataSource
    at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1062)
    at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:139)
    at org.hibernate.tool.hbm2ddl.SuppliedConnectionProviderConnectionHelper.prepare(SuppliedConnectionProviderConnectionHelper.java:51)
    at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:194)
    at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:178)
    at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:522)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1857)
    at classes.session.SessionCreate.buildSessionFactory1(SessionCreate.java:24)
    at classes.session.SessionCreate.<clinit>(SessionCreate.java:9)
    at classes.verifydata.CheckUniqueUserPass.uniqueUserPass(CheckUniqueUserPass.java:16)
    at org.apache.jsp.DataGen.CheckUserPassAvailable_jsp._jspService(CheckUserPassAvailable_jsp.java:70)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Unknown Source)
    10:56:19,762  INFO [http-bio-8081-exec-5] StatisticalLoggingSessionEventListener:275 - Session Metrics {
        42607 nanoseconds spent acquiring 1 JDBC connections;
        0 nanoseconds spent releasing 0 JDBC connections;
        0 nanoseconds spent preparing 0 JDBC statements;
        0 nanoseconds spent executing 0 JDBC statements;
        0 nanoseconds spent executing 0 JDBC batches;
        0 nanoseconds spent performing 0 L2C puts;
        0 nanoseconds spent performing 0 L2C hits;
        0 nanoseconds spent performing 0 L2C misses;
        0 nanoseconds spent executing 0 flushes (flushing a total of 0 entities and 0 collections);
        0 nanoseconds spent executing 0 partial-flushes (flushing a total of 0 entities and 0 collections)
    }
    Jan 06, 2015 10:56:19 AM org.apache.catalina.core.StandardWrapperValve invoke

我有这样的 Hibernate 配置文件

 <?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

    <session-factory>
        <property name="connection.driver_class">com.microsoft.sqlserver.jdbc.SQLServerDriver</property>
        <property name="hibernate.connection.datasource">java:comp/env/jdbc/secure_pass</property>
        <property name="hibernate.connection.url">connectionurl</property>
        <property name="hibernate.dialect">org.hibernate.dialect.SQLServer2008Dialect</property>
        <property name="hibernate.connection.username"></property>
        <property name="hibernate.connection.password"></property>

        <property name="hibernate.hbm2ddl.auto">update</property>
        <property name="net.sf.jasperreports.hql.query.run.type">list</property>
        <property name="net.sf.jasperreports.jdbc.fetch.size">50</property>
        <property name="net.sf.jasperreports.hql.clear.cache">true</property>
        <property name="net.sf.jasperreports.hql.query.list.page.size">50</property>

        ......

    </session-factory>
</hibernate-configuration>

我也有这样的 context-xml 文件：

 <?xml version="1.0" encoding="UTF-8"?> 
    <Context antiJARLocking="true" path="/DVDStore">

  <Resource 
  auth="Container"
  driverClassName="com.microsoft.sqlserver.jdbc.SQLServerDriver" 
  maxActive="30" maxIdle="10" 
  maxWait="10000" 
  name="jdbc/secure_pass" 
  password=""
  type="javax.sql.DataSource" 
  url="_DEV;" 
  username="r"/>
</Context>

不要担心这里的值......现在我得到了上述异常：请帮助。我已经完成了link

所需的所有操作

Answer 1

Spring 会调用 getConnection(String username, String password) 方法与数据库建立连接。但是 dbcp .jar 中的默认 getConnection(String username, String password) 方法会引发 UnsupportedOperationException。因此，您需要按如下方式覆盖该方法：

import java.sql.Connection;
import java.sql.SQLException;
import java.sql.SQLFeatureNotSupportedException;
import java.util.logging.Logger;
import org.apache.commons.dbcp.BasicDataSource;

public class MyDataSource extends BasicDataSource {

@Override
public Logger getParentLogger() throws SQLFeatureNotSupportedException {
    // TODO Auto-generated method stub
    return null;
}

@Override
public Connection getConnection(String username, String password) throws SQLException {
    // TODO Auto-generated method stub
    return createDataSource().getConnection();
}

}

Answer 2

我不得不调试一个类似的问题，可能的情况是你的类路径中有 hibernate.properties，可能在第三方 jar 之一中。

在我的案例中，开发人员添加了支持测试 jar 以及具有 hibernate.properties 的第三方 jar。

罪魁祸首正在填充属性 hibernate.connection.username 或 hibernate.connection.password

如果这些属性填充了非空值，hibernate 将调用

@Override
    public Connection getConnection() throws SQLException {
        if ( !available ) {
            throw new HibernateException( "Provider is closed!" );
        }
        return useCredentials ? dataSource.getConnection( user, pass ) : dataSource.getConnection();
    }

dataSource.getConnection( user, pass ) useCredentials 为真

org.apache.commons.dbcp.BasicDataSource类中的这个方法如下

public Connection getConnection(String user, String pass) throws SQLException {
        // This method isn't supported by the PoolingDataSource returned by
        // the createDataSource
        throw new UnsupportedOperationException("Not supported by BasicDataSource");
        // return createDataSource().getConnection(username, password);
    }

属性 useCredentials 填充为

    user = (String) configValues.get( Environment.USER );
    pass = (String) configValues.get( Environment.PASS );
    useCredentials = user != null || pass != null;

在方法中

公共无效配置（映射配置值）