我使用jsp和servlet开发了一个网站，但它提供了异常 java.sql.SQLException：ORA-00604.重新启动服务器后它运行正常。 以下是我的代码
public class LoginCheck extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public LoginCheck() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
ArrayList<String> appAddList = new ArrayList<String>();
ArrayList<String> appNameList = new ArrayList<String>();
PrintWriter out = response.getWriter();
Calendar objCal1=Calendar.getInstance();
Calendar objCal2=Calendar.getInstance();
objCal2.set(1970,0,1,0,0,0);
response.setDateHeader("Last-Modified",objCal1.getTime().getTime());
response.setDateHeader("Expires",objCal2.getTime().getTime());
response.setHeader( "Pragma" , "no-cache" );
response.setHeader( "Cache-Control" , "no-cache" );
response.addHeader("Cache-Control","no-store");
Cookie cookies[] = request.getCookies();
if(cookies != null) {
for(int i = 0; i < cookies.length; i++) {
cookies[i].setMaxAge(0);
response.addCookie(cookies[i]);
}
}
HttpSession session = request.getSession();
session.setAttribute( "user" , request.getParameter( "username" ) );
session.setAttribute( "pass" , request.getParameter( "pass" ) );
String user = (String)session.getAttribute( "user" );
String pass = (String)session.getAttribute( "pass" );
session.setMaxInactiveInterval(120);
java.sql.Connection con = TSM.intf.Common.com.Common.Connection.getConnection();
Statement stmtEmpTable = null;
Statement stmtAppTable = null;
PreparedStatement stmtDesigID = null;
PreparedStatement stmtEmpTableAppAcc = null;
try {
stmtEmpTable = con.createStatement();
stmtAppTable = con.createStatement();
stmtEmpTableAppAcc = con.prepareStatement( "select appaccess from employee where empid = ?" );
stmtDesigID = con.prepareStatement( "select desigid from employee where empid = ?" );
ResultSet rsEmp = stmtEmpTable.executeQuery( "Select empid , username , userpassword , employeename from Employee" );
ResultSet rsAppName = stmtAppTable.executeQuery( "select appname from application" );
boolean correctId = false;
boolean mach = false;
int indexnum = Integer.parseInt( request.getParameter("index") );
String[] appaccess = null;
String path = response.encodeURL(request.getContextPath() );
appAddList.add( 0 , path + "\\JSP\\Login\\index.jsp");
appNameList.add( 0 , "index" );
while( rsEmp.next() ) {
if( user.equals( rsEmp.getString("username") ) && pass.equals( rsEmp.getString("userpassword") ) ) {
correctId = true;
String name = rsEmp.getString("employeename");
String[] empName = name.split(" ");
String emp = "";
for(String str : empName) {
if( str.length() != 0 ) {
str = str.substring(0, 1).toUpperCase() + str.substring(1).toLowerCase() + " ";
emp += str;
}
}
session.setAttribute( "empname" , emp );
session.setAttribute( "empid" , rsEmp.getInt("empid") );
stmtEmpTableAppAcc.setInt( 1 , (Integer)session.getAttribute("empid") );
ResultSet rs = stmtEmpTableAppAcc.executeQuery();
rs.next();
appaccess = rs.getString("appaccess").split("#~##~#");
while( rsAppName.next() ) {
appAddList.add( path + "\\JSP\\Login\\" + rsAppName.getString("appname") + "Home.jsp" );
appNameList.add( rsAppName.getString("appname") );
}
stmtDesigID.setInt( 1 , (Integer)session.getAttribute("empid") );
ResultSet rsdesgid = stmtDesigID.executeQuery();
rsdesgid.next();
if( rsdesgid.getInt(1) == 1) {
appAddList.set( 1 , path + "\\JSP\\Login\\TimeManagerHome.jsp" );
}
for( String str : appaccess ) {
if( indexnum == 0) {
mach = true;
out.println("<html><HEAD><meta http-equiv=\"refresh\" content=\"0;URL=" + appAddList.get(indexnum) + "\"></HEAD>");
out.println("<body></body></html>");
}
if( str.equals( appNameList.get(indexnum) ) ) {
mach = true;
out.println("<html><HEAD><meta http-equiv=\"refresh\" content=\"0;URL=" + appAddList.get(indexnum) + "\"></HEAD>");
out.println("<body></body></html>");
}
}
rs.close();
rsdesgid.close();
}
}
String url = response.encodeURL(request.getContextPath() + "\\JSP\\Login\\Login.jsp");
if( !correctId ) {
out.print( "<script>alert(\"Please Enter Correct UserID & Password.\")</script>" );
out.println("<html><HEAD><meta http-equiv=\"refresh\" content=\"0;URL=" + url + "\"></HEAD>");
out.println("<body></body></html>");
}
if( !mach && correctId) {
out.print( "<script>alert(\"Do not use the application.\")</script>" );
out.println("<html><HEAD><meta http-equiv=\"refresh\" content=\"0;URL=" + url + "\"></HEAD>");
out.println("<body></body></html>");
}
rsEmp.close();
rsAppName.close();
} catch( SQLException e ) {
e.printStackTrace();
}
}
}
答案 0 :(得分：0)
我可以看到你已经打开了几个陈述和准备好的陈述：
stmtEmpTable = con.createStatement();
stmtAppTable = con.createStatement();
stmtEmpTableAppAcc = con.prepareStatement( "select appaccess from employee where empid = ?" );
stmtDesigID = con.prepareStatement("select ...");
但是我无法在 finally {} 块中看到你正确关闭。 我相信这是你获得 java.sql.SQLException：ORA-00604。
的地方请在finally{}块内关闭它们，并检查是否收到相同的异常错误。保持这是一个很好的做法。
希望这可以帮助您克服这个问题。
答案 1 :(得分：0)
您尚未关闭为sql连接建立的connection对象。建议关闭所有语句，结果集和连接对象。
finally{
resultset.close();
statement.close();
connection.close();
}
finally块也会在所有条件下执行。所以它会关闭所有与数据库相关的对象，避免造成错误。
答案 2 :(得分：0)
您可能遇到过这种情况：
要获取所有触发器的列表，您可以使用
select * from dba_triggers
where trigger_type not in ('BEFORE EACH ROW','AFTER EACH ROW')
（您可以排除行级触发器，因为它们在概念上属于表，并且在删除表时会自动删除）。在确定违规触发器后，您可以禁用或删除它。