小编Sri*_*vas的帖子

我在控制台上手动运行tomcat 6作为Windows服务.我需要在启动之前更改java_opts.我怎么做？另外,有没有办法可以动态地查看日志？

有什么办法可以限制stdout.logApache Tomcat中文件的大小吗？作为服务system.out语句运行时,请转到stdout文件.但是我需要一种机制,通过在达到2GB大小之后创建新文件或者类似的东西来控制stdout日志文件的大小.截至目前,每天都会创建一个新文件,但这还不够.

一旦达到大小限制,我正在尝试将我的tomcat配置为翻转日志文件.我正在运行tomcat作为Windows服务,并将我的所有stdout重定向到catalina.log.这是我通过logging.properties配置来设置大小限制的方式.但它没有用.

logging.properties

handlers = 1catalina.org.apache.juli.FileHandler, 2localhost.org.apache.juli.FileHandler, 3manager.org.apache.juli.FileHandler, 4host-manager.org.apache.juli.FileHandler, java.util.logging.ConsoleHandler

.handlers = 1catalina.org.apache.juli.FileHandler, java.util.logging.ConsoleHandler

############################################################
# Handler specific properties.
# Describes specific configuration info for Handlers.
############################################################

1catalina.org.apache.juli.FileHandler.level = FINE
1catalina.org.apache.juli.FileHandler.directory = e:/apache-tomcat/logs/server_111-1001
1catalina.org.apache.juli.FileHandler.prefix = catalina.
1catalina.org.apache.juli.FileHandler.limit = 100000 # size 100kb 
1catalina.org.apache.juli.FileHandler.count = 5


2localhost.org.apache.juli.FileHandler.level = FINE
2localhost.org.apache.juli.FileHandler.directory = e:/apache-tomcat/logs/server_111-1001
2localhost.org.apache.juli.FileHandler.prefix = localhost.

3manager.org.apache.juli.FileHandler.level = FINE
3manager.org.apache.juli.FileHandler.directory = e:/apache-tomcat/logs/server_111-1001
3manager.org.apache.juli.FileHandler.prefix = manager.

4host-manager.org.apache.juli.FileHandler.level = FINE
4host-manager.org.apache.juli.FileHandler.directory = e:/apache-tomcat/logs/server_111-1001
4host-manager.org.apache.juli.FileHandler.prefix = host-manager.

java.util.logging.ConsoleHandler.level = FINE
java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter


############################################################
# Facility …

这是context.xml中的我的Resource元素::

<Resource name="jdbc/myoracle" auth="Container"
              type="javax.sql.DataSource" driverClassName="oracle.jdbc.driver.OracleDriver"
              url="jdbc:oracle:thin:@localhost:1521:XE"
              username="hr" password="hr" maxActive="20" maxIdle="10"
              maxWait="-1"/> 

这是我在web.xml中的资源引用:

       <resource-ref>
            <description>Oracle Datasource</description>
            <res-ref-name>jdbc/myoracle</res-ref-name>
            <res-type>javax.sql.DataSource</res-type>
            <res-auth>Container</res-auth>
        </resource-ref>

然后@Resource我在代码中使用注释:

      @Resource(mappedName = "jdbc/myoracle")
        DataSource ds;

当我尝试在ds上使用getConnection()创建连接对象时,我在运行时得到一个空指针异常:

    Oct 24, 2011 12:18:21 PM org.apache.catalina.core.StandardWrapperValve invoke
    INFO: java.lang.NullPointerException
        at jdbc.patientDaoImpl.get_patients(patientDaoImpl.java:248)
        at org.apache.jsp.index2_jsp._jspService(index2_jsp.java:92)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:419)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:333)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:223)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:563)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:399) …

我有一个有时间的字符串.我需要把它四舍五入到最近的小时和最近的一分钟.我怎么在java中做到这一点？例如:字符串时间="12:58:15"; 我需要把它整理到1:00:00和12:58:00

我在oracle数据库中插入一条记录,我从java bean中获取值.它像这样::

insert into allergy (patient_id, allergy, reaction) values(seq_patient.nextval, '" + bean.getPatient_allergy() + "', '"+ bean.getReaction()+"')";

但过敏的值可能会产生撇号,导致sql失败,ORA-00917:缺少逗号.有没有办法克服这个问题？

我正在使用解析器解析以下XML:

<Person>
<Name>Test</Name>
<Phone>111-111-2222</OtherPhone>
<Address>lee h&amp;y</Address>
<Person>

sax解析器的characters方法只读取地址数据,直到'lee h',因为它不将'&'视为一个字符.我需要在address元素中获取完整的文本.关于我应该如何做的任何想法？这是我的sax解析器(这里的地址是一个标志,它通知XML中存在一个地址元素):

boolean address=false;

 public void startElement(String uri, String localName,
            String qName, Attributes attributes)
            throws SAXException {


        if (qName.equalsIgnoreCase("Address")) {
            address= true;

        }

    public void characters(char ch[], int start, int length)
                throws SAXException {

            String data = new String(ch, start, length);


            if (address) {

                System.out.println("Address is: "+data);
                address = false;
            }

输出是:: lee h