序列化对象工具类，用于保存和读取redis数据使用

朱雀 2020-10-24 17:15 583阅读 0赞

package com.lz.art.util;
    
    import java.io.ByteArrayInputStream;
    import java.io.ByteArrayOutputStream;
    import java.io.Closeable;
    import java.io.IOException;
    import java.io.ObjectInputStream;
    import java.io.ObjectOutputStream;
    import java.util.ArrayList;
    import java.util.List;
    
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    /**
     * 序列化对象工具类，用于保存和读取redis数据使用
     * Function:
     * Date: 2017年5月16日
     */
    public class SerializeUtil  {
    
        private static Logger log = LoggerFactory.getLogger(SerializeUtil.class);  
    
        /**
         * 序列化对象
         * @param object
         * @return
         */
        public static byte[] serialize(Object object) {  
            ObjectOutputStream oos = null;  
            ByteArrayOutputStream baos = null;  
            byte[] bytes = null;
            try {  
                // 序列化  
                baos = new ByteArrayOutputStream();  
                oos = new ObjectOutputStream(baos);  
                oos.writeObject(object);  
                bytes = baos.toByteArray();  
            } catch (Exception e) {  
                e.printStackTrace();  
            } finally {  
                try {  
                    if (oos != null) {  
                        oos.close();  
                    }  
                    if (baos != null) {  
                        baos.close();  
                    }  
                } catch (Exception e2) {  
                    e2.printStackTrace();  
                }  
            }  
            return bytes;  
        }  
    
        /**
         * 反序列化对象
         * @param bytes
         * @return
         */
        public static Object unserialize(byte[] bytes) { 
            Object obj = null; 
            ByteArrayInputStream bais = null;  
            try {  
                // 反序列化  
                bais = new ByteArrayInputStream(bytes);  
                ObjectInputStream ois = new ObjectInputStream(bais);  
                obj = ois.readObject();  
                ois.close();   
                bais.close();
            } catch (Exception e) {  
                e.printStackTrace();  
            }  
            return obj;  
        }  
    
        /**
         * 关闭的数据源或目标。调用 close()方法可释放对象保存的资源（如打开文件）
         * 关闭此流并释放与此流关联的所有系统资源。如果已经关闭该流，则调用此方法无效。
         * @param closeable
         */
        public static void close(Closeable closeable) {  
            if (closeable != null) {  
                try {  
                    closeable.close();  
                } catch (Exception e) {  
                    log.info("Unable to close %s", closeable, e);  
                }  
            }  
        }
    
        /**
         * 列表序列化（用于Redis整存整取）
         * @param value
         * @return
         */
        public static <T> byte[] serialize(List<T> value) {  
            if (value == null) {  
                throw new NullPointerException("Can't serialize null");  
            }  
            byte[] rv=null;  
            ByteArrayOutputStream bos = null;  
            ObjectOutputStream os = null;  
            try {  
                bos = new ByteArrayOutputStream();  
                os = new ObjectOutputStream(bos);  
                for(T obj : value){  
                    os.writeObject(obj);  
                }  
                os.writeObject(null);  
                os.close();  
                bos.close();  
                rv = bos.toByteArray();  
            } catch (IOException e) {  
                throw new IllegalArgumentException("Non-serializable object", e);  
            } finally {  
                close(os);
                close(bos);
            }  
            return rv;  
        }
    
        /**
         * 反序列化列表（用于Redis整存整取）
         * @param in
         * @return
         */
        public static <T> List<T> unserializeForList(byte[] in) {  
            List<T> list = new ArrayList<T>();  
            ByteArrayInputStream bis = null;  
            ObjectInputStream is = null;  
            try {  
                if(in != null) {  
                    bis=new ByteArrayInputStream(in);  
                    is=new ObjectInputStream(bis);  
                    while (true) {  
                        T obj = (T) is.readObject();  
                        if(obj == null){  
                            break;  
                        }else{  
                            list.add(obj);  
                        }  
                    }  
                    is.close();  
                    bis.close();  
                }  
            } catch (IOException e) {  
                log.warn("Caught IOException decoding %d bytes of data",  
                        in == null ? 0 : in.length, e);  
            } catch (ClassNotFoundException e) {  
                log.warn("Caught CNFE decoding %d bytes of data",  
                        in == null ? 0 : in.length, e);  
            } finally {  
                close(is);  
                close(bis);  
            }  
            return list;  
        }  
    
    }