我在servlet中有一个更新查询。语法是正确的，但是当我执行查询时，没有任何反应。执行保持冻结状态，命令永远不会结束。几分钟后，消息“ADVERTENCIA：GRIZZLY0023：中断空闲线程：http-thread-pool-8080（5）”。每隔几秒打印一次
我尝试过：
con.stmt.executeUpdate ("SQL");
con.rset = con.stmt.executeQuery ("SQL");
和PreparedStatement。
这是查询：
System.out.println(""
+ " UPDATE JSP_TABLE SET "
+ " field1 = '" + request.getParameter("input1") + "',"
+ " field2= '" + request.getParameter("input2") + "',"
+ " field3= '" + request.getParameter("input3") + "',"
+ " field4= '" + request.getParameter("input4") + "',"
+ " field5= '" + request.getParameter("input5") + "',"
+ " field6= '" + request.getParameter("input6") + "',"
+ " field7= '" + request.getParameter("input7") + "',"
+ " field8= '" + indicador + " VS " + request.getParameter("input8") + "',"
+ " field9= '" + request.getParameter("input") + " al " + request.getParameter("hasta9") + "'"
+ " WHERE ID_PK = " + request.getParameter("inputPK"));
我的所有语句，结果集和连接在使用结束时都会关闭。 我有第二次更新，工作正常。
package Funciones;
import conexion.conectar;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ActualizarDinamica extends HttpServlet {
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, SQLException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
conectar con = new conectar();
try {
/*
* TODO output your page here. You may use following sample code.
*/
con.stmt = con.conn.createStatement();
String indicador = "";
switch (Integer.parseInt(request.getParameter("indicador"))) {
case 1:
indicador = "Nivel de Servicio";
break;
case 2:
indicador = "Venta";
break;
case 3:
indicador = request.getParameter("txt_otro");
break;
case 0:
indicador = "Presencia";
break;
};
/* way 1
* con.rset = con.stmt.executeQuery(""
+ " UPDATE JSP_TABLE SET "
+ " FIELD1 = '" + request.getParameter("input1") + "',"
+ " FIELD2 = '" + request.getParameter("input2") + "',"
+ " FIELD3 = '" + request.getParameter("input3") + "',"
+ " FIELD4 = '" + request.getParameter("input4") + "',"
+ " FIELD5 = '" + request.getParameter("input5") + "',"
+ " FIELD6 = '" + request.getParameter("input6") + "',"
+ " FIELD7 = '" + request.getParameter("input7") + "',"
+ " FIELD8 = '" + indicador + " VS " + request.getParameter("input8") + "',"
+ " FIELD9 = '" + request.getParameter("input9") + " al " + request.getParameter("input10") + "'"
+ " WHERE FIELD_PK = " + request.getParameter("input11_ID"));
con.rset = con.stmt.executeQuery(""
+ " UPDATE JSP_TABLE2 SET"
+ " FIELD_DATE = TO_DATE('" + request.getParameter("input12") + " " + request.getParameter("input14") + ":" + request.getParameter("input13") + "','DD/MM/YYYY HH24:MI')"
+ " WHERE FIELD_ID = " + request.getParameter("input11_ID"));
*/
/* way 2
con.stmt.executeUpdate(""
+ " UPDATE JSP_TABLE SET "
+ " FIELD1 = '" + request.getParameter("input1") + "',"
+ " FIELD2 = '" + request.getParameter("input2") + "',"
+ " FIELD3 = '" + request.getParameter("input3") + "',"
+ " FIELD4 = '" + request.getParameter("input4") + "',"
+ " FIELD5 = '" + request.getParameter("input5") + "',"
+ " FIELD6 = '" + request.getParameter("input6") + "',"
+ " FIELD7 = '" + request.getParameter("input7") + "',"
+ " FIELD8 = '" + indicador + " VS " + request.getParameter("input8") + "',"
+ " FIELD9 = '" + request.getParameter("input9") + " al " + request.getParameter("input10") + "'"
+ " WHERE FIELD_PK = " + request.getParameter("input11_ID"));
con.stmt.executeUpdate(""
+ " UPDATE JSP_TABLE2 SET"
+ " FIELD_DATE = TO_DATE('" + request.getParameter("input12") + " " + request.getParameter("input14") + ":" + request.getParameter("input13") + "','DD/MM/YYYY HH24:MI')"
+ " WHERE FIELD_ID = " + request.getParameter("input11_ID"));
*/
//way 3
PreparedStatement updateSmallQuery = null;
PreparedStatement updateBigQuery = null;
String bigQuery=
""
+ " UPDATE JSP_TABLE SET "
+ " FIELD1 = '" + request.getParameter("input1") + "',"
+ " FIELD2 = '" + request.getParameter("input2") + "',"
+ " FIELD3 = '" + request.getParameter("input3") + "',"
+ " FIELD4 = '" + request.getParameter("input4") + "',"
+ " FIELD5 = '" + request.getParameter("input5") + "',"
+ " FIELD6 = '" + request.getParameter("input6") + "',"
+ " FIELD7 = '" + request.getParameter("input7") + "',"
+ " FIELD8 = '" + indicador + " VS " + request.getParameter("input8") + "',"
+ " FIELD9 = '" + request.getParameter("input9") + " al " + request.getParameter("input10") + "'"
+ " WHERE FIELD_PK = " + request.getParameter("input11_ID");
String smallQuery= ""
+ " UPDATE JSP_TABLE2 SET"
+ " FIELD_DATE = TO_DATE('" + request.getParameter("input12") + " " + request.getParameter("input14") + ":" + request.getParameter("input13") + "','DD/MM/YYYY HH24:MI')"
+ " WHERE FIELD_ID = " + request.getParameter("input11_ID");
try {
con.conn.setAutoCommit(false);
updateSmallQuery = con.conn.prepareStatement(smallQuery);
updateBigQuery = con.conn.prepareStatement(bigQuery);
updateBigQuery.executeUpdate();
updateSmallQuery.executeUpdate();
con.conn.commit();
} catch (SQLException e) {
System.out.println("catch!");
System.out.println(e.getMessage());
if (con != null) {
try {
System.err.print("Transaction is being rolled back");
con.conn.rollback();
} catch (SQLException excep) {
}
}
} finally {
if (updateSmallQuery != null) {
updateSmallQuery.close();
}
if (updateBigQuery != null) {
updateBigQuery .close();
}
con.conn.setAutoCommit(true);
}
response.sendRedirect("sol_env_c.jsp");
} finally {
con.conn.commit();
con.conn.close();
con.stmt.close();
out.close();
}
}
}
希望这有助于找到答案。 PD：小的运行没有问题。最重要的是问题。
编辑：
这是conectar（）
public conectar() {
try {
Class.forName("oracle.jdbc.OracleDriver");
System.out.println("Oracle JDBC driver loaded ok.");
conn = DriverManager.getConnection(params, user, password);
} catch (Exception e) {
System.err.println("Exception: " + e.getMessage());
}
}
答案 0 :(得分：0)
Bill几乎肯定是正确的，你只是锁定你想要更新的行。你提到“语法是正确的”，这表明你可能直接在数据库中检查过它 - 例如使用SQL * Plus或SQL Developer - 并且尚未在该会话中发布rollback（或commit）。尝试从代码中更新相同的行然后等待释放锁。
如果您可以找到手动运行更新的会话，请在其中发出rollback。如果不能，您可以通过以下查询查看哪些会话持有锁：
select vs.osuser, vs.process, vs.logon_time, vs.sid, vs.serial#, vs.program,
dl.lock_type, dl.mode_held, dl.blocking_others
from dba_locks dl
left join v$session vs on vs.sid = dl.session_id
where lock_type != 'Media Recovery'
and lock_type != 'Redo Thread';
当你的代码正在运行 - 并挂起 - 你可以通过以下方式看到阻止它的内容：
select vsw.osuser, vsw.process, vsw.logon_time, vsw.sid, vsw.program,
dw.lock_type, dw.mode_held,
vsh.osuser, vsh.process, vsh.logon_time, vsh.sid, vsh.serial#, vsh.program
from dba_waiters dw
left join v$session vsw on vsw.sid = dw.waiting_session
left join v$session vsh on vsh.sid = dw.holding_session;
或搜索其他示例，例如this。您需要权限才能查询v$效果视图，如果您没有这些视图，则可能需要DBA帮助。如果您无法手动回滚锁定，则可能需要DBA帮助来终止锁定会话。
你也应该注意关于参数化参数的评论。