Question

我正在尝试使用JDBC将此代码作为带有derby数据库的netbeans中的.JSP文件的servlet运行。我的问题并没有超出＆＃34; stmt.addBatch（查询）;＆＃34;它打印＆＃34;你好＆＃34;。我还在库中使用了derby.jar，derbyclient.jar和derbynet.jar。

期待听到别人的意见。

 import java.io.IOException;
 import java.io.PrintWriter;
 import javax.servlet.ServletException;
 import javax.servlet.annotation.WebServlet; 
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.sql.*;
 import java.io.*;
 import javax.sql.*;


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. You may use following sample code. */
        out.println("<!DOCTYPE html>");
        out.println("<html>");
        out.println("<head>");
        out.println("<title>Servlet Reg</title>");            
        out.println("</head>");
        out.println("<body>");
        String name=request.getParameter("name");
        String rate=request.getParameter("Rate");
        out.println(name);
        out.println(rate);
        Class.forName("org.apache.derby.jdbc.ClientDriver");

        Connection con=DriverManager.getConnection("jdbc:derby://localhost:1527/sample","APP","");
        Statement stmt=con.createStatement();

        String query="insert into movie values('"+rate+"','" +name+ "')";

        stmt.addBatch(query);
        out.println("hello");

        stmt.close();
        con.close();
        out.println("</body>");
        out.println("</html>");
    } catch(Exception e){
        e.printStackTrace();
    } finally {
        out.close();
    }
}

ExecuteUpdate（）挂起，无法运行我的程序

0 个答案: