【Demo】Base64编码图片转json的效果对比

 1 public class Test {
 2     public static void main(String[] args) throws IOException {
 3         byte[] data = Test.getFileByte();
 4         System.out.println("压缩前的大小:" + data.length / 1024.0 + " KB");
 5         //压缩
 6         byte[] resByte = Test.gzipFile(data);
 7         System.out.println("压缩以后的大小:" + resByte.length / 1024.0 + " KB");
 8 
 9         //base64
10         String encode = Base64.getEncoder().encodeToString(resByte);
11         System.out.println("base64以后的大小:" + encode.length() / 1024.0 + " KB");
12 
13         String json1 = GsonUtils.toJson(data);
14         System.out.println("原始数据转json大小:" + json1.length() / 1024.0 + " KB");
15         String json2 = GsonUtils.toJson(resByte);
16         System.out.println("压缩后转json大小:" + json2.length() / 1024.0 + " KB");
17         String json3 = GsonUtils.toJson(encode);
18         System.out.println("压缩并base64以后转json大小:" + json3.length() / 1024.0
19             + " KB");
20         System.out.println((double) json1.length() / data.length + " 倍");
21         System.out.println((double) json2.length() / data.length + " 倍");
22         System.out.println((double) json3.length() / data.length + " 倍");
23 
24     }
25 
26     private static byte[] gzipFile(byte[] data) throws IOException {
27         ByteArrayOutputStream bos1 = new ByteArrayOutputStream();
28 
29         GZIPOutputStream gzip = new GZIPOutputStream(bos1);
30         gzip.write(data);
31 
32         gzip.flush();
33         gzip.close();
34         gzip.finish();
35 
36         return bos1.toByteArray();
37     }
38 
39     private static byte[] getFileByte() throws IOException {
40         String path = "D:\\111.png";
41         File file = new File(path);
42         InputStream fis = null;
43         ByteArrayOutputStream bos = null;
44         byte[] data = new byte[0];
45         try {
46             fis = new FileInputStream(file);
47 
48             bos = new ByteArrayOutputStream((int) file.length());
49 
50             byte[] buf = new byte[1024];
51             int len = -1;
52             while ((len = fis.read(buf)) != -1) {
53                 bos.write(buf, 0, len);
54             }
55             data = bos.toByteArray();
56         } catch (Exception e) {
57             e.printStackTrace();
58         } finally {
59             if (bos != null) {
60                 bos.close();
61             }
62 
63             if (fis != null) {
64                 fis.close();
65             }
66         }
67         return data;
68     }
69 }

结果：
压缩前的大小:1.9638671875 KB
压缩以后的大小:1.97265625 KB
base64以后的大小:2.6328125 KB
原始数据转json大小:7.1806640625 KB
压缩后转json大小:7.263671875 KB
压缩并base64以后转json大小:2.64453125 KB
3.6563898557931376 倍
3.6986573843858777 倍
1.3465937344604675 倍