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我試圖做一個搜索程序:前端 - java和後端 - mysql。mySql-java簡單的搜索控制檯應用程序
我試着一點點,下面的代碼:
public static void searchRecord() throws SQLException{
Scanner in = new Scanner(System.in);
int empnum;
System.out.print("Enter employee number: ");
empnum = in.nextInt();
String search = "SELECT fname FROM employees WHERE emp_num='"+ empnum + "'";
resultSet = statement.executeQuery(search);
String empnum_rs = null;
while(resultSet.next()){
empnum_rs = resultSet.getString(empnum);
}
System.out.print(empnum_rs);
}
我來到這裏的問題是,當我鍵入emp_num日食拋出這些行:
Exception in thread "main" java.sql.SQLException: Column Index out of range, 2 > 1.
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:988)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:974)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:919)
at com.mysql.jdbc.ResultSetImpl.checkColumnBounds(ResultSetImpl.java:830)
at com.mysql.jdbc.ResultSetImpl.getStringInternal(ResultSetImpl.java:5773)
at com.mysql.jdbc.ResultSetImpl.getString(ResultSetImpl.java:5692)
at Test.searchRecord(Test.java:55)
at Test.main(Test.java:37)
哦感謝隊友!我應該爲我的emp_num放置列。再次感謝 – 2012-07-10 13:29:20
您可以在'get ...'方法中使用coumn編號或列名稱。 – 2012-07-10 13:30:32
但是當我添加lname列時,它只顯示fname。我如何連接姓氏? – 2012-07-10 13:30:38