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--- java-example:total-line-number [2021/11/15 07:40] – morgan0329
+++ java-example:total-line-number [2021/11/15 07:53] (current) – morgan0329
@@ Line 1: / Line 1: @@
+====== 统计代码行数 ======
+<code java>
+package com.platform;
+/**
+ * 用来统计某个文件夹下到底有多少行代码的
+ * @author Morgan.L
+ * @version 1.0
+ * @date 2020/10/26 16:31
+ */
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import org.apache.commons.lang3.StringUtils;
+public class MainTotalLineNumber {
+  public static void main(String[] args) throws IOException {
+    countLine("C:/git5/First", true);
+    System.out.println("totalLineNum=>" + totalLineNum + " totalFileNum=>" + totalFileNum
+      + " lineNum/fileNum=>" + (totalLineNum/totalFileNum));
+    totalLineNum = 0;
+    totalFileNum = 0;
+    countLine("C:/git5/Second", true);
+    System.out.println("totalLineNum=>" + totalLineNum + " totalFileNum=>" + totalFileNum
+      + " lineNum/fileNum=>" + (totalLineNum/totalFileNum));
+  }
+  private static BufferedReader bufferedReader = null;
+  private static int totalLineNum = 0;
+  private static int totalFileNum = 0;
+  private static String[] allowFileTypes = {".java", ".xml", ".properties"};
+  private static void countLine(String filePath, boolean ignoreBlankLine) throws IOException {
+    File file = new File(filePath);
+    countOneFile(file, ignoreBlankLine);
+  }
+  private static void countOneFile(File file, boolean ignoreBlankLine) throws IOException {
+    File[] children = file.listFiles();
+    if(children == null) return;
+    for (int i = 0; i < children.length; i++) {
+      if(children[i].isDirectory() && "target".equals(children[i].getName())) {
+        continue;
+      }
+      if (children[i].isFile() && validFileType(children[i].getName(), allowFileTypes)) {
+        totalFileNum++;
+        bufferedReader = new BufferedReader(new FileReader(children[i]));
+        if (ignoreBlankLine) {
+          String line;
+          while ((line = bufferedReader.readLine()) != null) {
+            if (StringUtils.isNotBlank(line)) {
+              totalLineNum++;
+            }
+          }
+        } else {
+          while (bufferedReader.readLine() != null) {
+            totalLineNum++;
+          }
+        }
+      } else {
+        countOneFile(children[i], ignoreBlankLine);
+      }
+    }
+  }
+  public static boolean validFileType(String filePath, String... allowTypes) {
+    if (StringUtils.isNotBlank(filePath)) {
+      for (String type : allowTypes) {
+        if (filePath.indexOf(type) > -1) {
+          return true;
+        }
+      }
+    }
+    return false;
+  }
+}
+</code>