困扰已久的错误：java.sql.SQLException: Invalid SQL statement or JDBC escape，盼高人解决。
错误代码：

HTML code

log4j:ERROR Failed to excute sqljava.sql.SQLException: Invalid SQL statement or JDBC escape, terminating ''' not found.    at net.sourceforge.jtds.jdbc.SQLParser.parse(SQLParser.java:1155)    at net.sourceforge.jtds.jdbc.SQLParser.parse(SQLParser.java:156)    at net.sourceforge.jtds.jdbc.JtdsStatement.executeImpl(JtdsStatement.java:684)    at net.sourceforge.jtds.jdbc.JtdsStatement.executeUpdate(JtdsStatement.java:1166)    at net.sourceforge.jtds.jdbc.JtdsStatement.executeUpdate(JtdsStatement.java:1119)    at org.apache.log4j.jdbc.JDBCAppender.execute(JDBCAppender.java:178)    at org.apache.log4j.jdbc.JDBCAppender.flushBuffer(JDBCAppender.java:250)    at org.apache.log4j.jdbc.JDBCAppender.append(JDBCAppender.java:146)    at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:251)    at org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:66)    at org.apache.log4j.Category.callAppenders(Category.java:206)    at org.apache.log4j.Category.forcedLog(Category.java:391)    at org.apache.log4j.Category.log(Category.java:856)    at org.apache.commons.logging.impl.Log4JLogger.warn(Log4JLogger.java:222)    at com.opensymphony.xwork2.util.logging.commons.CommonsLogger.warn(CommonsLogger.java:56)    at org.apache.struts2.components.ServletUrlRenderer.renderFormUrl(ServletUrlRenderer.java:186)    at org.apache.struts2.components.Form.populateComponentHtmlId(Form.java:220)    at org.apache.struts2.components.UIBean.evaluateParams(UIBean.java:784)    at org.apache.struts2.components.ClosingUIBean.start(ClosingUIBean.java:57)    at org.apache.struts2.views.jsp.ComponentTagSupport.doStartTag(ComponentTagSupport.java:53)    at org.apache.jsp.web.enterprise.add_jsp._jspx_meth_s_005fform_005f0(add_jsp.java:188)    at org.apache.jsp.web.enterprise.add_jsp._jspx_meth_c_005fif_005f0(add_jsp.java:154)    at org.apache.jsp.web.enterprise.add_jsp._jspService(add_jsp.java:115)    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)    at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:88)    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)    at com.yaxing.util.ResFilter.doFilter(ResFilter.java:63)    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)    at java.lang.Thread.run(Thread.java:619) 
 

添加页面代码：
奇怪的是，这错误很诡异，只出现一次，以后再运行这个页面这个错误就不出来了，而且这个错误测试了N长时间了，确定了是页面的错了，因为这只是个添加的页面，项目中所有的查询页面都不报这个错的。都不知道重启了多少次tomcat了。。。



[解决办法]
这个是log4j的bug
要扩展log4j的JDBCAppender

import org.apache.log4j.Category;
import org.apache.log4j.Logger;
import org.apache.log4j.Priority;
import org.apache.log4j.jdbc.JDBCAppender;
import org.apache.log4j.spi.LoggingEvent;

import com.aopen.log.ReLoggingEvent;

public class MyJDBCAppender extends JDBCAppender {
@Override
protected String getLogStatement(LoggingEvent event) {
String fqnOfCategoryClass = event.fqnOfCategoryClass;
Category logger = Logger.getRootLogger();
Priority level = event.getLevel();
Object message = event.getMessage();
Throwable throwable = null;
ReLoggingEvent bEvent = new ReLoggingEvent(fqnOfCategoryClass, logger,
level, message, throwable);
return super.getLogStatement(bEvent);
}
}
[解决办法]
不好意思，漏了另一个类的代码
import org.apache.log4j.Category;
import org.apache.log4j.Priority;
import org.apache.log4j.spi.LoggingEvent;

public class ReLoggingEvent extends LoggingEvent {
private static final long serialVersionUID = 3359112146209080210L;

public ReLoggingEvent(String fqnOfCategoryClass, Category logger,
Priority level, Object message, Throwable throwable) {
super(fqnOfCategoryClass, logger, level, message, throwable);
}

@Override
public String getThreadName() {
String thrdName = super.getThreadName();
if (thrdName.indexOf("'") != -1) {
thrdName = thrdName.replaceAll("'", "''");
}
return thrdName;
}

/**
*
*
* @see org.apache.log4j.spi.LoggingEvent#getRenderedMessage()
*/
@Override
public String getRenderedMessage() {
String renderedMessage = super.getRenderedMessage();

if (renderedMessage != null && renderedMessage.indexOf("'") != -1)
renderedMessage = renderedMessage.replaceAll("'", "''");
return renderedMessage;
}
}


[解决办法]
然后配置log4j时，使用MyJDBCAppender替换JDBCAppender
[解决办法]
http://kai2008.iteye.com/blog/767484
log4j之重写JDBCAppender