初次提交

file-center/src/test/java/ParseTest.java

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+/**
+ * @author fancl
+ * @desc:
+ * @date 2022/12/15
+ */
+public class ParseTest {
+
+    public static void main(String[] args) {
+        int onLine = 5;
+        int inverterCount = 3;
+        double rate = Math.ceil((double)onLine/ inverterCount);
+        System.out.println(rate);
+
+        int i = 1;
+        int j=3;
+        double d = (double) i/ j;
+        System.out.println("d:"+d);
+    }
+}

file-center/src/test/java/com/ho/filecenter/FileRead.java

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+package com.ho.filecenter;
+
+import cn.hutool.core.codec.Base64;
+import com.ho.common.tools.exception.BaseResponseCode;
+import com.ho.common.tools.exception.BusinessException;
+import sun.misc.BASE64Encoder;
+
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.RandomAccessFile;
+
+/**
+ * @author fancl
+ * @desc:
+ * @date 2023/1/5
+ */
+public class FileRead {
+    public static void main(String[] args) {
+        String path = "d:/2.png";
+        BASE64Encoder encoder = new BASE64Encoder();
+        try {
+            byte[] bytes = readBlock(path, 0);
+
+            BufferedImage bufferedImage = ImageIO.read(new File(path));
+            ByteArrayOutputStream baos = new ByteArrayOutputStream();
+            ImageIO.write(bufferedImage, "png", baos);
+            byte[] bytes2 = baos.toByteArray();
+            String encode = Base64.encode(bytes);
+            String trim2 = encoder.encodeBuffer(bytes).trim();
+            System.out.println();
+            System.out.println();
+        }catch (Exception e){
+
+        }
+
+
+    }
+
+    //按位置分块读取文件内容
+    public static byte[] readBlock(String path, int pointer) throws Exception {
+        if (!new File(path).exists()){
+            throw new BusinessException(BaseResponseCode.FILE_NOT_EXISTS) ;
+        }
+        RandomAccessFile raf = new RandomAccessFile(path, "r");
+        long length = raf.length();
+        System.out.println("文件大小：" + length);
+        //设置指针的位置,每次有偏移
+        raf.seek(pointer * 102400);
+        //每次读取102400字节,这个应该改为参数配置
+        byte[] bytes = new byte[102400];
+        int readSize = raf.read(bytes);
+        //如果没有读到102400个字节，需要做数组拷贝
+        //读取时判断是否还有剩余字节
+        if (readSize < 102400) {
+            byte[] copy = new byte[readSize];
+            System.arraycopy(bytes, 0, copy, 0, readSize);
+            raf.close();
+            return copy;
+        }
+        raf.close();
+        return bytes;
+    }
+}

file-center/src/test/java/com/ho/filecenter/Test2.java

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+package com.ho.filecenter;
+
+import cn.hutool.core.date.DateUtil;
+import com.ho.common.tools.constant.CommonConstant;
+
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+/**
+ * @author fancl
+ * @desc:
+ * @date 2022/12/26
+ */
+public class Test2 {
+    public static void main(String[] args) {
+        Date now = new Date();
+        //开始时间,currentMaxDay之前的那天
+        String beginTime = DateUtil.format(DateUtil.offsetDay(now, -30), CommonConstant.DATE_YMD)
+                + CommonConstant.START_SUFFIX_TIMESTAMP;
+        //今天的23:59:59
+        String endTime = DateUtil.format(DateUtil.endOfDay(now), CommonConstant.DATE);
+        System.out.println();
+
+        List<Integer> list =new ArrayList();
+        list.add(1);
+        System.out.println( list.size());
+    }
+
+
+}