fix bom

hutool-captcha/src/test/java/cn/hutool/captcha/CaptchaTest.java

@@ -108,4 +108,11 @@ public class CaptchaTest {
 		captcha.write("d:/test/gif_captcha.gif");
 		assert captcha.verify(captcha.getCode());
 	}
+
+	@Test
+	public void bgTest(){
+		LineCaptcha captcha = CaptchaUtil.createLineCaptcha(200, 100, 4, 1);
+		captcha.setBackground(Color.WHITE);
+		captcha.write("d:/test/test.jpg");
+	}
 }

hutool-core/src/main/java/cn/hutool/core/io/BOMInputStream.java

@@ -1,13 +1,13 @@
 package cn.hutool.core.io;
 
+import cn.hutool.core.util.CharsetUtil;
+
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.PushbackInputStream;
 
-import cn.hutool.core.util.CharsetUtil;
-
 /**
- * 读取带BOM头的流内容，<code>getCharset()</code>方法调用后会得到BOM头的编码，且会去除BOM头<br>
+ * 读取带BOM头的流内容，{@code getCharset()}方法调用后会得到BOM头的编码，且会去除BOM头<br>
  * BOM定义：http://www.unicode.org/unicode/faq/utf_bom.html<br>
  * <ul>
  * <li>00 00 FE FF = UTF-32, big-endian</li>
@@ -46,10 +46,20 @@ public class BOMInputStream extends InputStream {
 	}
 	// ----------------------------------------------------------------- Constructor end
 
+	/**
+	 * 获取默认编码
+	 *
+	 * @return 默认编码
+	 */
 	public String getDefaultCharset() {
 		return defaultCharset;
 	}
 
+	/**
+	 * 获取BOM头中的编码
+	 *
+	 * @return 编码
+	 */
 	public String getCharset() {
 		if (!isInited) {
 			try {

hutool-core/src/main/java/cn/hutool/core/io/FileUtil.java

@@ -1019,8 +1019,8 @@ public class FileUtil extends PathUtil {
 	 * @param isRetainExt 是否保留原文件的扩展名，如果保留，则newName不需要加扩展名
 	 * @param isOverride  是否覆盖目标文件
 	 * @return 目标文件
-	 * @since 3.0.9
 	 * @see PathUtil#rename(Path, String, boolean)
+	 * @since 3.0.9
 	 */
 	public static File rename(File file, String newName, boolean isRetainExt, boolean isOverride) {
 		if (isRetainExt) {
@@ -1704,6 +1704,17 @@ public class FileUtil extends PathUtil {
 		}
 	}
 
+	/**
+	 * 读取带BOM头的文件为Reader
+	 *
+	 * @param file 文件
+	 * @return BufferedReader对象
+	 * @since 5.5.8
+	 */
+	public static BufferedReader getBOMReader(File file) {
+		return IoUtil.getReader(getBOMInputStream(file));
+	}
+
 	/**
 	 * 获得一个文件读取器
 	 *

hutool-core/src/main/java/cn/hutool/core/io/IoUtil.java

@@ -222,6 +222,17 @@ public class IoUtil extends NioUtil {
 		return getReader(in, Charset.forName(charsetName));
 	}
 
+	/**
+	 * 从{@link BOMInputStream}中获取Reader
+	 *
+	 * @param in {@link BOMInputStream}
+	 * @return {@link BufferedReader}
+	 * @since 5.5.8
+	 */
+	public static BufferedReader getReader(BOMInputStream in) {
+		return getReader(in, in.getCharset());
+	}
+
 	/**
 	 * 获得一个Reader
 	 *

hutool-core/src/test/java/cn/hutool/core/io/FileUtilTest.java

@@ -118,7 +118,7 @@ public class FileUtilTest {
 	}
 
 	@Test
-	public void equlasTest() {
+	public void equalsTest() {
 		// 源文件和目标文件都不存在
 		File srcFile = FileUtil.file("d:/hutool.jpg");
 		File destFile = FileUtil.file("d:/hutool.jpg");

hutool-poi/src/test/java/cn/hutool/poi/excel/ExcelUtilTest.java

@@ -42,4 +42,12 @@ public class ExcelUtilTest {
 		Assert.assertEquals(0, a11.getX());
 		Assert.assertEquals(10, a11.getY());
 	}
+
+	@Test
+	public void readAndWriteTest(){
+		ExcelReader reader = ExcelUtil.getReader("d:\\test/select.xls");
+		ExcelWriter writer = reader.getWriter();
+		writer.writeCellValue(1, 2, "设置值");
+		writer.close();
+	}
 }