在上一段代码中，我收到了标题中列出的完全相同的错误。
我的代码中有一个用户名验证器，但忘记包含以下代码：
password =ESAPI.validator().getValidInput("Login password", password, "Password", 20, false);
添加后我解决了这个问题。
现在在我的下一个java页面中，我遇到了同样的问题并检查了代码，但如果我实际上遗漏了某些内容，则无法找到我所缺少的内容。
我和另一段正在处理的代码有同样的错误，并且能够解决它，因为我忘了包含另一行代码。
对于这段代码，我已经多次查看过，但无法弄清楚它有什么问题。
以下是代码：
package com.tunestore.action;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import org.apache.struts.action.DynaActionForm;
import org.apache.struts.util.MessageResources;
import org.owasp.esapi.ESAPI;
import com.tunestore.util.IWithDataSource;
public class RegisterAction extends Action implements IWithDataSource {
private DataSource dataSource;
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
}
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
DynaActionForm daf = (DynaActionForm)form;
ActionMessages errors = new ActionMessages();
ActionForward forward = mapping.getInputForward();
MessageResources resources = getResources(request);
//ESAPI START
if (!ESAPI.validator().isValidInput("Register username", daf.getString("username"), "SafeString", 20, false)) {
//ESAPI END
errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("errors.required", resources.getMessage("prompt.username")));
}
//ESAPI START
if (!ESAPI.validator().isValidInput("Register password", daf.getString("password"), "password", 20, false)) {
//ESAPI END
errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("errors.required", resources.getMessage("prompt.password")));
}
//ESAPI START
if (!ESAPI.validator().isValidInput("Register confirm password", daf.getString("rptpass"), "password", 20, false)) {
//ESAPI END
errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("errors.required", resources.getMessage("prompt.rpt")));
}
if ((null != daf.getString("password")) && (null != daf.getString("rptpass"))) {
if (! daf.getString("password").equals(daf.getString("rptpass"))) {
errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("error.rptpass.nomatch"));
}
}
Connection conn = null;
try {
conn = dataSource.getConnection();
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("SELECT COUNT(*) USERCNT "
+ "FROM TUNEUSER "
+ "WHERE USERNAME = '"
+ daf.getString("username")
+ "'");
rs.next();
if (rs.getInt("USERCNT") > 0) {
errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("error.user.exists"));
} else if (errors.isEmpty()) {
//ESAPI START
String sql = "INSERT INTO TUNEUSER (USERNAME,PASSWORD,BALANCE) VALUES (?, ?, ?)";
PreparedStatement pStmt = conn.prepareStatement(sql);
pStmt.setString(0, daf.getString("username"));
pStmt.setString(1, daf.getString("password"));
pStmt.setDouble(2, 0.00);
pStmt.executeUpdate();
//ESAPI END
ActionMessages msgs = getMessages(request);
msgs.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("user.added"));
forward = mapping.findForward("success");
}
} catch (Exception e) {
e.printStackTrace();
throw e;
} finally {
if (conn != null) {
try { conn.close(); } catch (Exception e) {}
}
}
request.setAttribute("ERRORS.REGISTER", errors);
return forward;
}
}
代码用于注册表单。当有人试图注册时，虽然给出了以下错误。
java.sql.SQLException: The column position '0' is out of range. The number of columns for this ResultSet is '3'.
at org.apache.derby.client.am.SQLExceptionFactory40.getSQLException(Unknown Source)
at org.apache.derby.client.am.SqlException.getSQLException(Unknown Source)
at org.apache.derby.client.am.ColumnMetaData.getColumnType(Unknown Source)
at org.apache.derby.client.am.PreparedStatement.setString(Unknown Source)
at org.apache.commons.dbcp.DelegatingPreparedStatement.setString(DelegatingPreparedStatement.java:132)
at com.tunestore.action.RegisterAction.execute(RegisterAction.java:90)
at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110)
at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:306)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at com.tunestore.servlet.PersistenceFilter.doFilter(PersistenceFilter.java:77)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:244)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:108)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:558)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:379)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:259)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:281)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: org.apache.derby.client.am.SqlException: The column position '0' is out of range. The number of columns for this ResultSet is '3'.
at org.apache.derby.client.am.ColumnMetaData.checkForValidColumnIndex(Unknown Source)
... 34 more
ROOT CAUSE
org.apache.derby.client.am.SqlException: The column position '0' is out of range. The number of columns for this ResultSet is '3'.
at org.apache.derby.client.am.ColumnMetaData.checkForValidColumnIndex(Unknown Source)
at org.apache.derby.client.am.ColumnMetaData.getColumnType(Unknown Source)
at org.apache.derby.client.am.PreparedStatement.setString(Unknown Source)
at org.apache.commons.dbcp.DelegatingPreparedStatement.setString(DelegatingPreparedStatement.java:132)
at com.tunestore.action.RegisterAction.execute(RegisterAction.java:90)
at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110)
at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:306)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at com.tunestore.servlet.PersistenceFilter.doFilter(PersistenceFilter.java:77)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:244)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:108)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:558)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:379)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:259)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:281)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
错误似乎指向我的代码的第90行：
pStmt.setString(0, daf.getString("username"));
然而，这行代码对我来说是正确的。我能错过什么？
答案 0 :(得分：6)
JDBC索引中的列索引从1开始
我无法看到您在代码中调用setString，但堆栈跟踪清楚地表明execute在第90行调用了setString。当您收到此异常时，您发布的代码是否正在运行？