jedis获取redis中二进制图片转Base64jedis获取redis里面的图片转成Base64

104 阅读 0 评论 69 点赞

我是靠谱客的博主虚心黑米，最近开发中收集的这篇文章主要介绍jedis获取redis中二进制图片转Base64jedis获取redis里面的图片转成Base64，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

文章目录

jedis获取redis里面的图片转成Base64
- jedis存对象
- jedis获取redis里面的图片转成Base64
- 获取Base64字符
- 转Base64工具类

jedis获取redis里面的图片转成Base64

jedis存对象

/** * 序列化 * * @param object * @return */ 
public static byte[] serialize(Object object) { 
    ObjectOutputStream oos = null; 
    ByteArrayOutputStream baos = null; 
    try { 
        baos = new ByteArrayOutputStream(); 
        oos = new ObjectOutputStream(baos); 
        oos.writeObject(object); 
        byte[] bytes = baos.toByteArray(); 
        return bytes; 
    } catch (Exception e) { 
        
    } return null; 
} 
/** * 反序列化 * * @param bytes * @return */ 
public static Object unserialize(byte[] bytes) {
    ByteArrayInputStream bais = null; 
    try { 
		ObjectInputStream inputStream;
        inputStream = new ObjectInputStream(new ByteArrayInputStream(bytes));
        Object obj = inputStream.readObject();
    } catch (Exception e) {
        
    } 
    return null;
}

jedis获取redis里面的图片转成Base64

/**
	 * 将字节转为对象
	 */
	public Object byte2Object(byte[] bytes) {
        if (bytes == null || bytes.length == 0)
            return null;
        try {
            ObjectInputStream inputStream;
            inputStream = new ObjectInputStream(new ByteArrayInputStream(bytes));
            Object obj = inputStream.readObject();
            return obj;
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        return null;
    }

获取Base64字符

String imgBase64Str = Base64Utill.getImgBase64Str(  
    (byte[])(byte2Object(jedis.get(key.getBytes())))  );

转Base64工具类

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.imageio.stream.FileImageInputStream;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;



public class Base64Utill {
	/** 
	  * 
	  * @Description 将字节转Base64文件
	  * @param data 要转换的字节
	  * @param fileType 文件类型
	  * @return Base64字符串
	  */
	public static String getImgBase64Str(byte[] data, String fileType) throws IOException {
	    String fileContentBase64 = null;
	    String base64Str = "data:" + fileType + ";base64,";
	    String content = null;      
	        //对字节数组Base64编码
	        if (data == null || data.length == 0) {
	            return null;
	        }
	        BASE64Encoder encoder = new BASE64Encoder();
	        content = encoder.encode(data);
	        if (content == null || "".equals(content)) {
	            return null;
	        }
	        fileContentBase64 = base64Str + content;

	    return fileContentBase64;
	}
	
	
	/** 
	  * 
	  * @Description 将字节转Base64
	  * @param data 要转换的字节

	  * @return Base64字符串
	  */
	public static String getImgBase64Str(byte[] data) throws IOException {
	    String fileContentBase64 = null;
	    String content = null;      
	        //对字节数组Base64编码
	        if (data == null || data.length == 0) {
	            return null;
	        }
	        BASE64Encoder encoder = new BASE64Encoder();
	        content = encoder.encode(data);
	        
	        if (content == null || "".equals(content)) {
	            return null;
	        }
	        fileContentBase64=content;
	    return fileContentBase64;
	}
	
	/** 
	  * 
	  * @Description 将字节转Base64文件
	  * @param file  要转换的文件
	  * @param fileType 文件类型
	  * @return Base64字符串
	  */
	public static String getImgBase64Str(File file)  {
	    String fileContentBase64 = null;
	 
	    String content = null;
	    //将图片文件转化为字节数组字符串，并对其进行Base64编码处理
	    InputStream in = null;
	    //读取图片字节数组
	    try {
	        in = new FileInputStream(file);
	        byte[] data =  new byte[in.available()];
	        in.read(data);
	        in.close();
	        //对字节数组Base64编码
	        if (data == null || data.length == 0) {
	            return null;
	        }
	        BASE64Encoder encoder = new BASE64Encoder();
	        content = encoder.encode(data);
	        if (content == null || "".equals(content)) {
	            return null;
	        }
	        return encoder.encode(data);
	    } catch (IOException e) {
	        e.printStackTrace();
	    } finally {
	        if (in != null) {
	            try {
					in.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
	        }
	    }
	    return fileContentBase64;
	}
	
	/** 
	  * 
	  * @Description 将字节转Base64文件
	  * @param file  要转换的文件
	  * @param fileType 文件类型
	  * @return Base64字符串
	  */
	public static String getImgBase64Str(File file, String fileType) throws IOException {
	    String fileContentBase64 = null;
	    String base64Str = "data:" + fileType + ";base64,";
	    String content = null;
	    //将图片文件转化为字节数组字符串，并对其进行Base64编码处理
	    InputStream in = null;
	    //读取图片字节数组
	    try {
	        in = new FileInputStream(file);
	        byte[] data =  new byte[in.available()];
	        in.read(data);
	        in.close();
	        //对字节数组Base64编码
	        if (data == null || data.length == 0) {
	            return null;
	        }
	        BASE64Encoder encoder = new BASE64Encoder();
	        content = encoder.encode(data);
	        if (content == null || "".equals(content)) {
	            return null;
	        }
	        fileContentBase64 = base64Str + content;
	    } catch (IOException e) {
	        e.printStackTrace();
	    } finally {
	        if (in != null) {
	            in.close();
	        }
	    }
	    return fileContentBase64;
	}

	/** 
	  * 
	  * @Description base64转字节
	  * @param base64Str 字符串 
	  * @return byte[]  
	  */
	 public static byte[] base64String2Byte(String base64Str){  
         BASE64Decoder decoder = new BASE64Decoder();
         byte[] b = null;
          try {
              b = decoder.decodeBuffer(base64Str);
              for (int i = 0; i < b.length; ++i) {
                  if (b[i] < 0) {
                      b[i] += 256;
                  }
             }
         } catch (IOException e) {
             e.printStackTrace();
         }  
         return b;  
   	 }

	 /**
	     * 将图片转换成Base64编码
	     * @param imgFile 待处理图片
	     * @return
	     */
    public static String getImgBase64Str(String imgFile) {
        // 将图片文件转化为字节数组字符串，并对其进行Base64编码处理

        InputStream in = null;
        byte[] data = null;
        // 读取图片字节数组
        try {
            in = new FileInputStream(imgFile);
            data = new byte[in.available()];
            in.read(data);
            in.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        BASE64Encoder encoder = new BASE64Encoder();
        return encoder.encode(data);
    }
	 
    /**
	     * 将图片转换成字节数组
	     * @param imgFile 待处理图片
	     * @return
	     */
    public  byte[] image2byte(String path){
        byte[] data = null;
        FileImageInputStream input = null;
        try {
            input = new FileImageInputStream(new File(path));
            ByteArrayOutputStream output = new ByteArrayOutputStream();
            byte[] buf = new byte[1024];
            int numBytesRead = 0;
            while ((numBytesRead = input.read(buf)) != -1) {
                output.write(buf, 0, numBytesRead);
            }
            data = output.toByteArray();
            output.close();
            input.close();
        }
        catch (FileNotFoundException ex1) {
            ex1.printStackTrace();
        }
        catch (IOException ex1) {
            ex1.printStackTrace();
        }
        return data;
    }
	    
    /**
	  * 对字节数组字符串进行Base64解码并生成图片
	  * @param imgStr 图片数据
	  * @param imgFilePath 保存图片全路径地址
	  * @return
	  */
    public static boolean generateImage(String imgStr, String imgFilePath) {
        //
        if (imgStr == null) // 图像数据为空
            return false;
        BASE64Decoder decoder = new BASE64Decoder();
        try {
            // Base64解码
            byte[] b = decoder.decodeBuffer(imgStr);
            for (int i = 0; i < b.length; ++i) {
                if (b[i] < 0) {// 调整异常数据
                    b[i] += 256;
                }
            }
            // 生成jpg图片
            OutputStream out = new FileOutputStream(imgFilePath);
            out.write(b);
            out.flush();
            out.close();
            return true;
        } catch (Exception e) {
            return false;
        }
	    }
	}

b[i] += 256;
}
}
// 生成jpg图片
OutputStream out = new FileOutputStream(imgFilePath);
out.write(b);
out.flush();
out.close();
return true;
} catch (Exception e) {
return false;
}
}
}