Jdbc 转换分离结果集并将其转换为CachedRowSetImpl时出错
这个问题是由于我使用的是getClob(1),我的数据库是mysql,所以CachedRowSet可能在mysql的实现上有问题…:(.如果我使用getClob,那么它会给出类型不匹配,当我将其转换为字符串并使用时,它会给出以下异常Jdbc 转换分离结果集并将其转换为CachedRowSetImpl时出错,jdbc,resultset,Jdbc,Resultset,这个问题是由于我使用的是getClob(1),我的数据库是mysql,所以CachedRowSet可能在mysql的实现上有问题…:(.如果我使用getClob,那么它会给出类型不匹配,当我将其转换为字符串并使用时,它会给出以下异常 public CachedRowSet viewQuery(String query) throws SQLException, Exception { //query = query; //CachedRowSetImpl crs = Ca
public CachedRowSet viewQuery(String query) throws SQLException, Exception {
//query = query;
//CachedRowSetImpl crs =
CachedRowSet crs = new CachedRowSetImpl();
try {
if (connection.isClosed()) {
setConnection();
}
System.out.println("Connection count 1 : " + connectionCount);
statement = connection.createStatement();
rs = statement.executeQuery(query);
crs.populate(rs);
crs = crs.createCopy();
closeConnection();
System.out.println("Connection count 2 : " + connectionCount);
} catch (Exception e) {
e.printStackTrace();
}
return crs;
}
例外情况:
SEVERE: Servlet.service() for servlet jsp threw exception
java.sql.SQLException: Invalid cursor position
at com.sun.rowset.CachedRowSetImpl.next(Unknown Source)
at
org.apache.jsp.eTender.Buyer.TenderBidCre_jsp._jspService(TenderBidCre_jsp.java:1460)
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:388)
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.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
at
org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:551)
at
org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:488)
at
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:968)
at org.apache.jsp.EProc_jsp._jspService(EProc_jsp.java:532)
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:388)
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.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:293)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)
错误跟踪中有两条语句需要查看 首先,
org.apache.jsp.eTender.Buyer.TenderBidCre_jsp._jspService(TenderBidCre_jsp.java:1460)
第二,
org.apache.jsp.EProc_jsp._jspService(EProc_jsp.java:532)
如果您使用的是Tomcat,那么您将在/Tomcat/work/Catalina/localhost/yourApp/org/apache/JSP
或者在您使用的地方提供JSPCachedRowSet
。问题就在那里
可能有用。阅读请给我解决方案,我也提出了我的方法