Parameter index out of range (1 > number of parameters, which is 0).] with r

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遇到Parameter index out of range (1 > number of parameters, which is 0)怎么办？
2011年05月12日星期四 23:45

遇到了Parameter index out of range (1 > number of parameters, which is 0) ，检查了很多遍错误。最后终于发现，原来PreparedStatement的sql中？是不能带有’单引号的。谢天谢地…一个很简单的失误，我折腾了4个钟头，忘大家引以为戒啊…

// 查询指定用户public User_table selOperation(String id) {   String sql = "select * from user_table where Id='?' ";   User_table user = null;   try {    PreparedStatement pst = (PreparedStatement) AdoOpen.openConn()      .prepareStatement(sql);    pst.setString(1, id);    ResultSet rs = pst.executeQuery();    if (rs.next()) {     user = new User_table();     user.setId(rs.getString(1));     user.setName(rs.getString(2));     user.setPassword(rs.getString(3));     user.setOnline(rs.getInt(4));     user.setQita(rs.getString(5));    }    rs.close();    pst.close();    //AdoOpen.CloseConn();   } catch (SQLException e) {    e.printStackTrace();   }   return user;}java.sql.SQLException: Parameter index out of range (1 > number of parameters, which is 0).at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926)at com.mysql.jdbc.PreparedStatement.checkBounds(PreparedStatement.java:3326)at com.mysql.jdbc.PreparedStatement.setInternal(PreparedStatement.java:3310)at com.mysql.jdbc.PreparedStatement.setString(PreparedStatement.java:4146)at ado.User_ADO.selOperation(User_ADO.java:60)at unit.ProssSeverl.rundom(ProssSeverl.java:95)at unit.ProssSeverl.regidit(ProssSeverl.java:71)at unit.ProssSeverl.Dealwith(ProssSeverl.java:43)at unit.ProssSeverl.service(ProssSeverl.java:36)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)at java.lang.Thread.run(Unknown Source)原来:String sql = "select * from user_table where Id='?' ";?不可以加单引号 改为String sql = "select * from user_table where Id=? ";

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