Question

public void selectdata(Connection conn, String database){

    String table = "Mo";  // using Mo table,
    String comandoSql = "SELECT * FROM " + database + "."+"dbo"+ "."+ table;
    try {
        stmt = conn.createStatement();  

        rs = stmt.executeQuery(comandoSql);
        System.out.println("Command sql: ");
        while (rs.next()) {
            String DocumentName = rs.getString(2); 
            doc1 = DocumentName;
            try {

                File file = new File("///.txt");  // path to output folder.
                FileWriter fileWritter = new FileWriter(file,true);
                BufferedWriter out = new BufferedWriter(fileWritter);
                out.write(doc1);
                out.newLine();
                out.close();

                  } catch (IOException e1) {
              System.out.println("Could not write in the file");
            } 
          }
    } catch (SQLException e) {
            e.printStackTrace();
    }

这会生成输出文件但包含一个文件中的所有记录，我的问题是如何为每个记录生成单独的文件，不想做后期处理以生成单独的文件？任何帮助??????不喜欢扫描仪，因为不知道一条记录中有多少行（这是一种存储在数据库表中的多种文件!!!!）

Answer 1

只需为每条记录创建一个新文件：

 int counter = 0;

 while (rs.next()) {
        String DocumentName = rs.getString(2); 
        doc1 = DocumentName;
        try {

            File file = new File("///" + counter + ".txt");  // path to output folder.
            FileWriter fileWritter = new FileWriter(file,true);
            BufferedWriter out = new BufferedWriter(fileWritter);
            out.write(doc1);
            out.newLine();
            out.close();
            counter++;

              } catch (IOException e1) {
          System.out.println("Could not write in the file");
        } 
      }

只需创建一个计数器变量或其他东西来区分每个文件。将计数器附加到文件名，以便为每条记录创建一个新文件......

如何为每个sql记录创建单独的输出文件？

1 个答案: