小编Roh*_*hit的帖子

Java中的FileInputStream和BufferedInputStream有什么区别？

我有以下要求:其实我有txt文件我需要压缩这个文件并使用oracle UTL_COMPRESS包创建gz文件.我需要在Unix 11b上使用Oracle 11g实现此功能.我已经尝试使用下面的代码,它在某种程度上工作.我的意思是它正在努力压缩小尺寸文件.

DECLARE
   f utl_file.file_type;
   compressed     BLOB;
  data_b BFILE;
BEGIN
   f := UTL_FILE.fopen ('DIR_UTL_COM_TEST', 'Test1.gz', 'wb');
   data_b := BFILENAME ('DIR_UTL_COM_TEST','pk_intibuy_pkb.txt');
   DBMS_LOB.FILEOPEN (data_b, DBMS_LOB.LOB_READONLY);
   DBMS_LOB.createtemporary (compressed, false);
   compressed := UTL_COMPRESS.lz_compress (data_b,6);
   UTL_FILE.put_raw(f, compressed, true);
   UTL_FILE.fclose (f);
   DBMS_LOB.FILECLOSE (data_b);
   DBMS_LOB.freetemporary (compressed);
END;

但是这段代码无法压缩大文件.如果有人在oracle 11g中实现此功能,请帮忙.非常感谢.错误消息:

Error report:
ORA-06502: PL/SQL: numeric or value error 
ORA-06512: at line 11 06502. 00000 - "PL/SQL: numeric or value error%s"

以下是Employee bean类.

public class Employee {
    public String name;
    public int age;

    public Employee()
    {

    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge()
    {
        return age;
    }

    public void setAge(int age)
    {
        this.age = age;
    }
}

我有其他EmployeeTest类,在其中我创建Employee类的对象并存储在ArrayList中.

import java.util.ArrayList;

public class EmployeeTest {
    public static void main(String[] args) 
    {
        ArrayList<Employee> empList = new ArrayList<Employee>();
        Employee emp1 = new Employee();
        emp1.setAge(15);
        emp1.setName("Employee1");
        Employee emp2 = new Employee();
        emp2.setAge(10); …