小编Sha*_*han的帖子

当从java程序存储长值时，mongodb该值以这种格式存储

`NumberLong(n)`.

 db.mycollection.find()

    { "_id" : ObjectId("52bd9475c8ceae448b16c077"), "companyId" : NumberLong(10132), "tableId" : NumberLong(87803), "rowId" : NumberLong(88154), "classNameId" : NumberLong(10129), "classPK" : NumberLong(88153) }

但我想将这些值存储为 10132、87803 等。

我正在尝试使用java程序中的JDBC连接到AS400 DB2数据库,但我无法连接,因为它提供了一个SQLException,指出没有为jdbc找到合适的驱动程序:as400://192.168.1.11

虽然我添加了没有为jdbc找到合适的驱动程序:as400://192.168.1.11

我将以下库添加到我的项目中:db2jcc_licence_cu.jar,db2jcc4.jar,jt400-6.4.jar.

import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.ResultSet;
public class ReadAllTables {
        public static void main(String args[]) throws Exception {
                //Class.forName ("com.ibm.as400.access.AS400JDBCDriver");
                DriverManager.registerDriver(new com.ibm.as400.access.AS400JDBCDriver());

                // Enable logging
                // DriverManager.setLogStream(System.err);

                System.out.println("Getting Connection");
                Connection c = DriverManager.getConnection ("?jdbc:as400://ipaddress","username","password");  
                DatabaseMetaData md = c.getMetaData();
                ResultSet rs = md.getTables(null, null, "%", null);
                while (rs.next()) {
                  System.out.println(rs.getString(3));

                }



        }

}

这就是我得到的错误:

在线程"main"java.sql.SQLException中获取连接异常:在java.sql.DriverManager.getConnection(java.sql.DriverManager.getConnection上的java.sql.DriverManager.getConnection(未知源)中找不到合适的jdbc驱动程序:as400://192.168.1.11来自com.test.ReadAllTables.main的未知来源(ReadAllTables.java:18)

提前致谢

当我在 tomcat 服务器上的 liferay 6.0.6 中一个接一个地部署两个 portlet 时，第二个部署的 portlet 正在取消部署第一个部署的 portlet，反之亦然，在更改其顺序时发生：

堆栈跟踪：

 2ERROR [HotDeployUtil:112] com.liferay.portal.kernel.deploy.hot.HotDeployException: Error registering plugins for abc-portlet
 3com.liferay.portal.kernel.deploy.hot.HotDeployException: Error registering plugins for abc-portlet
 4    at com.liferay.portal.kernel.deploy.hot.BaseHotDeployListener.throwHotDeployException(BaseHotDeployListener.java:45)
 5    at com.liferay.portal.deploy.hot.PluginPackageHotDeployListener.invokeDeploy(PluginPackageHotDeployListener.java:161)
 6    at com.liferay.portal.kernel.deploy.hot.HotDeployUtil._doFireDeployEvent(HotDeployUtil.java:109)
 7    at com.liferay.portal.kernel.deploy.hot.HotDeployUtil._fireDeployEvent(HotDeployUtil.java:182)
 8    at com.liferay.portal.kernel.deploy.hot.HotDeployUtil.fireDeployEvent(HotDeployUtil.java:38)
 9    at com.liferay.portal.kernel.servlet.PortletContextListener.doPortalInit(PortletContextListener.java:99)
10    at com.liferay.portal.kernel.util.BasePortalLifecycle.portalInit(BasePortalLifecycle.java:42)
11    at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:52)
12    at com.liferay.portal.kernel.util.BasePortalLifecycle.registerPortalLifecycle(BasePortalLifecycle.java:50)
13    at com.liferay.portal.kernel.servlet.PortletContextListener.contextInitialized(PortletContextListener.java:55)
14    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4135)
15    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4630)
16    at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1244)
17    at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1342)
18    at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:303)
19    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
20    at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1337)
21    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601) …