Java SQL更新无法正常工作
我正在处理JSF页面，该页面显示设置值并将设置更新到Oracle表中：Java SQL更新无法正常工作,java,sql,oracle,Java,Sql,Oracle,我正在处理JSF页面，该页面显示设置值并将设置更新到Oracle表中： public void updateDBSettings() throws SQLException { /* -- TABLE GLOBALSETTINGS CREATE TABLE GLOBALSETTINGS( SETTINGNAME VARCHAR2(40 ) NOT NULL, SETTINGVALUE VA
public void updateDBSettings() throws SQLException {
/*
-- TABLE GLOBALSETTINGS
CREATE TABLE GLOBALSETTINGS(
SETTINGNAME VARCHAR2(40 ) NOT NULL,
SETTINGVALUE VARCHAR2(40 )
)
/
*/
String SQL_Statement = null;
if (ds == null) {
throw new SQLException();
}
Connection conn = ds.getConnection();
if (conn == null) {
throw new SQLException();
}
PreparedStatement ps = null;
try {
conn.setAutoCommit(false);
boolean committed = false;
try {
/* Insert the new settings values with one SQL statement */
SQL_Statement = "UPDATE GLOBALSETTINGS "
+ "SET \"SettingValue\" = "
+ "CASE "
+ "WHEN \"SettingName\" = 'SessionTTL' THEN ? "
+ "WHEN \"SettingName\" = 'MaxUsersActive' THEN ? "
+ "WHEN \"SettingName\" = 'TimestampFormat' THEN ? "
+ "END "
+ "WHERE \"SettingName\" IN ('SessionTTL', 'MaxUsersActive', 'TimestampFormat')";
/* Execute the SQL statement */
ps = conn.prepareStatement(SQL_Statement);
ps.setString(1, settingsMap.get("SessionTTL"));
ps.setString(2, settingsMap.get("MaxUsersActive"));
ps.setString(3, settingsMap.get("TimestampFormat"));
ps.executeQuery();
conn.commit();
committed = true;
} finally {
if (!committed) {
conn.rollback();
}
}
} finally {
/* Release the resource after all SQL queries are executed */
ps.close();
conn.close();
}
/* Refresh Hash Map
* Get again settings from Oracle
*/
initSettings();
// Display the message
FacesContext context = FacesContext.getCurrentInstance();
context.addMessage(null, new FacesMessage("Successful", "Settings are updated"));
}
javax.faces.FacesException: #{ApplicationController.updateDBSettings}: java.sql.SQLSyntaxErrorException: ORA-00904: "SettingName": invalid identifier
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118)
at javax.faces.component.UICommand.broadcast(UICommand.java:315)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:722)
Caused by: javax.faces.el.EvaluationException: java.sql.SQLSyntaxErrorException: ORA-00904: "SettingName": invalid identifier
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
... 31 more
Caused by: java.sql.SQLSyntaxErrorException: ORA-00904: "SettingName": invalid identifier
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:445)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:396)
at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:879)
at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:450)
at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:192)
at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:531)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:207)
at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:1044)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1329)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3584)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3628)
at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeQuery(OraclePreparedStatementWrapper.java:1493)
at com.sun.gjc.spi.jdbc40.PreparedStatementWrapper40.executeQuery(PreparedStatementWrapper40.java:642)
at com.DX_57.SM_57.Application.updateDBSettings(Application.java:139)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at com.sun.el.parser.AstValue.invoke(AstValue.java:254)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:302)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
... 32 more
|#]
你能帮我解决这个问题吗？我确信问题出在SQL语句中。您的SQL是错误的。按照在Oracle中创建表的方式，应该删除SQL（双引号转义）- 当您使用以下SQL创建表时-
CREATE TABLE GLOBALSETTINGS(
SETTINGNAME VARCHAR2(40 ) NOT NULL,
SETTINGVALUE VARCHAR2(40 ) )
CREATE TABLE "GlobalSettings" (
"SettingName" VARCHAR2(40 ) NOT NULL,
"SettingValue" VARCHAR2(40 ) )
使用第一种方法，Oracle将所有内容都转换为大写。如果使用第二种方法，表/列名将保持区分大小写。如果使用第二种方法，则必须在sql中显示表/列名。对于第一种方法，您不应该转义表/列名。您的SQL是错误的。按照在Oracle中创建表的方式，应该删除SQL（双引号转义）- 当您使用以下SQL创建表时-
CREATE TABLE GLOBALSETTINGS(
SETTINGNAME VARCHAR2(40 ) NOT NULL,
SETTINGVALUE VARCHAR2(40 ) )
CREATE TABLE "GlobalSettings" (
"SettingName" VARCHAR2(40 ) NOT NULL,
"SettingValue" VARCHAR2(40 ) )