我有一个包含2列的表,用于在Oracle数据库中存储应用程序设置.这是一个基本的例子：

我想创建一个用预准备语句更新值的java方法.

示例代码：

更新的代码

public void updateDBSettings() throws SQLException {

String SQL_Statement = null;

if (ds == null) throw new SQLException();

Connection conn = ds.getConnection();

if (conn == null) throw new SQLException();

try {

conn.setAutoCommit(false);

boolean committed = false;

try {

SQL_Statement = "UPDATE GLOBALSETTINGS SET (SettingName = ?, SettingValue = ?)";

PreparedStatement updateQuery = conn.prepareStatement(SQL_Statement);

updateQuery.setString(1, "20");

updateQuery.setString(2, "40");

updateQuery.executeQuery();

conn.commit();

committed = true;

} finally {

if (!committed) conn.rollback();

}

}

finally {

conn.close();

}

}

我知道这个SQL语句是错误的.编写SQL语句的正确方法是什么？

最好的祝愿

彼得

P.S更新代码后,我得到这个错误堆栈：

javax.faces.el.E​​valuationException：java.sql.SQLSyntaxErrorException：ORA-00907：缺少右括号

at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102)

at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)

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:1542)

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:849)

at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:746)

at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1045)

at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:228)

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)

引起：java.sql.SQLSyntaxErrorException：ORA-00907：缺少右括号

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:124)

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 javax.el.BeanELResolver.invokeMethod(BeanELResolver.java:779)

at javax.el.BeanELResolver.invoke(BeanELResolver.java:528)

at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:257)

at com.sun.el.parser.AstValue.invoke(AstValue.java:248)

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