我使用以下代码来执行查询。它显示错误为 ORA-00905:缺少关键字。当我在 sql*plus 中执行此操作时，它显示正确的结果。使用 servlet 则不会。任何人都可以帮我解决这个问题
public class PickOfferNo extends HttpServlet {
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
try {
//TODO output your page here
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet PickOfferNo</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1>Servlet PickOfferNo at " + request.getContextPath () + "</h1>");
out.println("</body>");
out.println("</html>");
} finally {
out.close();
}
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//processRequest(request, response);
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
try
{
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet PickOfferNo</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1>Servlet PickOfferNo at " + request.getContextPath () + "</h1>");
doPost(request,response);
out.println("</body>");
out.println("</html>");
}
finally
{
out.close();
}
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//processRequest(request, response);
String ofrn=null;
String cd=null;
String no=null;
cd=request.getParameter("sec_code");
PrintWriter out=response.getWriter();
try
{
Class.forName("oracle.jdbc.driver.OracleDriver");
java.sql.Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@192.168.1.200:1521:pdsm", "test", "test");
Statement stmt=conn.createStatement();
conn.setAutoCommit(true);
ResultSet rs=stmt.executeQuery("select to_char(nvl(max(substr(offerno,4,4)),0)+1) into '"+no+"' from offer1 where div_sec='"+cd+"'");
ResultSet rs1=stmt.executeQuery("select lpad(ltrim(rtrim("+no+")),4,'0') from dual");
if(rs1.next())
no=rs1.getString(1);
ofrn=cd+no;
//obj.put("offrn", ofrn);
out.println(ofrn);
}
catch(Exception e)
{
out.println(e.getMessage());
}
}
/**
* Returns a short description of the servlet.
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}
谢谢。请帮忙
最佳答案
SELECT INTO 表达式在这里不起作用。 SELECT INTO 表达式只能在 PL/SQL 运行时使用，例如在存储过程中。您应该使用常规的 SELECT 语法并照常从 ResultSet 对象获取结果。以下代码应该可以工作:
ResultSet rs=stmt.executeQuery("select to_char(nvl(max(substr(offerno,4,4)),0)+1) from offer1 where div_sec='"+cd+"'");
if(rs.next())
no=rs.getString(1);
ResultSet rs1=stmt.executeQuery("select lpad(ltrim(rtrim("+no+")),4,'0') from dual");
if(rs1.next())
no=rs1.getString(1);
关于java - ORA-00905 : missing keyword error in executing from servlet，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/14398827/