package com.test.zhuce;import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;public class Cshi {
public static void main(String[] args) throws ClassNotFoundException
{
Connection con = null;
Statement sql=null;
ResultSet rs=null;
String uid="12092401";
String sid="2221";
Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver");
try {
con=DriverManager.getConnection("jdbc:odbc:lib","","");
} catch (SQLException e) {
System.out.println("执行2");
}
String sqle="UPDATE yonghu set id1='"+sid+"' WHERE id="+"\'"+uid+"\'";
try {
sql.executeUpdate(sqle);
} catch (SQLException e)
{
System.out.println("执行");
} }}
错误信息是:java.lang.NullPointerException
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;public class Cshi {
public static void main(String[] args) throws ClassNotFoundException
{
Connection con = null;
Statement sql=null;
ResultSet rs=null;
String uid="12092401";
String sid="2221";
Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver");
try {
con=DriverManager.getConnection("jdbc:odbc:lib","","");
} catch (SQLException e) {
System.out.println("执行2");
}
String sqle="UPDATE yonghu set id1='"+sid+"' WHERE id="+"\'"+uid+"\'";
try {
sql.executeUpdate(sqle);
} catch (SQLException e)
{
System.out.println("执行");
} }}
错误信息是:java.lang.NullPointerException
解决方案 »
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