这是本人项目里查询数据库方法里其中之一，之前用Oracle数据库时没有异常，
public DocumentImpl selectRecordById(DocumentImpl doc){
String name=null;
String val=null;
NodeList children = doc.getDocumentElement().getChildNodes();
name=children.item(0).getNodeName();
val=children.item(0).getTextContent();
//查询
Connection con=null;
DocumentImpl result=new DocumentImpl();
Element root = result.createElement("root");
result.appendChild(root);
try{
con=JdbcUtil.getConnection();
con.setAutoCommit(false);
String sql="select * from clerk_ledger_xjy where "+name+" = ?";
//System.out.println(sql);
PreparedStatement ps = con.prepareStatement(sql);
ps.setString(1, val);
con.commit();
ResultSet rs = ps.executeQuery();
ResultSetMetaData rsmd = rs.getMetaData();
int count = rsmd.getColumnCount();
int row=1;
while(rs.next()){
Element rows = result.createElement("row"+row);
root.appendChild(rows);
for (int i = 1;i <= count;i++){
String key = rsmd.getColumnLabel(i).toLowerCase();
String value = (rs.getString(key)==null?"":rs.getString(key));
WSDomUtil.appendChildNode(result , rows, key, value);
//System.out.println(key+":"+value);
}
row++;
}
}catch (Exception e) {
e.printStackTrace();
try {
con.rollback();
} catch (SQLException e1) {
e1.printStackTrace();
}
throw new RuntimeException(
"查询失败", e);
} finally {
JdbcUtil.close(con);
}
// try {
// System.out.println(WSDomUtil.convertXMLDOMToString(result));
// } catch (Exception e) {
// e.printStackTrace();
// }
return result;
}
现在换成数据库db2，方法调用的时候老是报错：
com.ibm.db2.jcc.am.SqlException: [jcc][t4][10251][10308][3.57.82] 正在连接上执行事务时，请求了 java.sql.Connection.close()。 事务仍然保持活动状态，不能关闭连接。 ERRORCODE=-4471, SQLSTATE=null com.ibm.db2.jcc.am.bd.a(bd.java:660) com.ibm.db2.jcc.am.bd.a(bd.java:60) com.ibm.db2.jcc.am.bd.a(bd.java:120) com.ibm.db2.jcc.am.jb.u(jb.java:1167) com.ibm.db2.jcc.am.jb.x(jb.java:1190) com.ibm.db2.jcc.am.jb.v(jb.java:1176) com.ibm.db2.jcc.am.jb.close(jb.java:1160) util.JdbcUtil.close(JdbcUtil.java:41) dao.SelectDao.selectById(SelectDao.java:63) service.QueryServiceImpl.finduser(QueryServiceImpl.java:18) web.QueryController.query(QueryController.java:55) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) java.lang.reflect.Method.invoke(Unknown Source) org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215) org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132) org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745) org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686) org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:953) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:844) javax.servlet.http.HttpServlet.service(HttpServlet.java:624) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:829) javax.servlet.http.HttpServlet.service(HttpServlet.java:731) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
上面已经commit过，事务已经提交 ，下面关闭连接怎么还会出问题 ，求高手指点
解决方案
30
ps.executeQuery();//执行完后
con.commit();
con.commit();