fix code

hutool-poi/src/main/java/cn/hutool/poi/csv/CsvParser.java

@@ -12,12 +12,7 @@ import java.io.Closeable;
 import java.io.IOException;
 import java.io.Reader;
 import java.io.Serializable;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.LinkedHashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Objects;
+import java.util.*;
 
 /**
  * CSV行解析器，参考：FastCSV
@@ -32,7 +27,7 @@ public final class CsvParser extends ComputeIter<CsvRow> implements Closeable, S
 	private final Reader reader;
 	private final CsvReadConfig config;
 
-	private final Buffer buf = new Buffer(IoUtil.DEFAULT_LARGE_BUFFER_SIZE);
+	private final Buffer buf;
 	/**
 	 * 前一个特殊分界字符
 	 */
@@ -78,8 +73,20 @@ public final class CsvParser extends ComputeIter<CsvRow> implements Closeable, S
 	 * @param config 配置，null则为默认配置
 	 */
 	public CsvParser(final Reader reader, final CsvReadConfig config) {
+		this(reader, config, IoUtil.DEFAULT_LARGE_BUFFER_SIZE);
+	}
+
+	/**
+	 * CSV解析器
+	 *
+	 * @param reader Reader
+	 * @param config 配置，null则为默认配置
+	 * @param bufferSize 默认缓存大小
+	 */
+	public CsvParser(final Reader reader, final CsvReadConfig config, final int bufferSize) {
 		this.reader = Objects.requireNonNull(reader, "reader must not be null");
 		this.config = ObjUtil.defaultIfNull(config, CsvReadConfig::defaultConfig);
+		this.buf = new Buffer(bufferSize);
 	}
 
 	/**

hutool-poi/src/main/java/cn/hutool/poi/csv/CsvReader.java

@@ -1,13 +1,12 @@
 package cn.hutool.poi.csv;
 
-import cn.hutool.core.io.file.FileUtil;
 import cn.hutool.core.io.IORuntimeException;
 import cn.hutool.core.io.IoUtil;
+import cn.hutool.core.io.file.FileUtil;
 import cn.hutool.core.lang.func.SerConsumer;
 
 import java.io.Closeable;
 import java.io.File;
-import java.io.IOException;
 import java.io.Reader;
 import java.nio.charset.Charset;
 import java.nio.file.Path;
@@ -132,14 +131,9 @@ public class CsvReader extends CsvBaseReader implements Iterable<CsvRow>, Closea
 	 * @since 5.7.14
 	 */
 	public Stream<CsvRow> stream() {
-		return StreamSupport.stream(spliterator(), false)
-				.onClose(() -> {
-					try {
-						close();
-					} catch (final IOException e) {
-						throw new IORuntimeException(e);
-					}
-				});
+		return StreamSupport
+				.stream(spliterator(), false)
+				.onClose(this::close);
 	}
 
 	@Override
@@ -148,7 +142,7 @@ public class CsvReader extends CsvBaseReader implements Iterable<CsvRow>, Closea
 	}
 
 	@Override
-	public void close() throws IOException {
+	public void close() {
 		IoUtil.close(this.reader);
 	}
 }

hutool-poi/src/main/java/cn/hutool/poi/excel/cell/NullCell.java

@@ -73,21 +73,11 @@ public class NullCell implements Cell {
 		return null;
 	}
 
-	@Deprecated
-	public CellType getCellTypeEnum() {
-		return null;
-	}
-
 	@Override
 	public CellType getCachedFormulaResultType() {
 		return null;
 	}
 
-	@Deprecated
-	public CellType getCachedFormulaResultTypeEnum() {
-		return null;
-	}
-
 	@Override
 	public void setCellValue(final double value) {
 		throw new UnsupportedOperationException("Can not set any thing to null cell!");

hutool-poi/src/test/java/cn/hutool/poi/csv/Issue2783Test.java

@@ -11,12 +11,14 @@ public class Issue2783Test {
 	@Test
 	@Ignore
 	public void readTest() {
-//		final CsvWriter writer = CsvUtil.getWriter("d:/test/big.csv", CharsetUtil.UTF_8);
-//		for (int i = 0; i < Integer.MAX_VALUE; i++) {
-//			writer.writeLine("aaaa", "bbbb", "ccccc", "dddd");
-//		}
-//		writer.close();
+		// 测试数据
+		final CsvWriter writer = CsvUtil.getWriter("d:/test/big.csv", CharsetUtil.UTF_8);
+		for (int i = 0; i < Integer.MAX_VALUE; i++) {
+			writer.writeLine("aaaa", "bbbb", "ccccc", "dddd");
+		}
+		writer.close();
 
+		// 读取
 		final CsvReader reader = CsvUtil.getReader(FileUtil.getReader("d:/test/big.csv", CharsetUtil.UTF_8));
 		reader.read((SerConsumer<CsvRow>) strings -> {