jdbc-db2 - 提取完整记录

Question

我试图从 DB2 table 中提取数据。我想知道是否有一种方法可以在不指定各个列名称的情况下从 ResultSet 打印整个记录。

我的代码：

import java.sql.*;

            public class Ftp {
                public static void main(String[] args) {
                    String url = "jdbc:db2://mvshost:4456/SQA_SYSTEM";
                    String user = "xxxxx";
                    String password = "yyyyyy";
                    Connection con;
                    PreparedStatement stmt;
                    ResultSet rs;
                    try {
                        Class.forName("com.ibm.db2.jcc.DB2Driver");
                        con = DriverManager.getConnection(url, user, password);
                        con.setAutoCommit(false);
                        stmt = con.prepareStatement("SELECT EMP FROM IDATDMK.GREEN");
                        rs = stmt.executeQuery();
                        while (rs.next()) {
                            String EMP = rs.getString("EMP");
                            System.out.println("EMP from DB2 = " + EMP);                    
                        }
                        rs.close();
                        stmt.close();
                        con.commit();
                        con.close();

                    }
                    catch (Exception e) {
                      System.out.println("Exception: " + e);
                      }
                    }
                }
            }

如果我将查询写成 Select * from IDATDMK.GREEN，我如何在不指定各个列名称的情况下在 while 循环中打印整个记录。我在 table.

中有 80 多列

Answer 1

ResultSetMetaData rsmd = rs.getMetaData();
int columnsNumber = rsmd.getColumnCount();

while(rs.next(){
for (int i = 1; i <= columnsNumber; i++) {
       if (i > 1) System.out.print("\n");
       String columnValue = rs.getString(i);
       System.out.print(columnValue) }}

jdbc-db2 - 提取完整记录

jdbc-db2 - extract full record

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