add method

CHANGELOG.md

@@ -3,12 +3,13 @@
 
 -------------------------------------------------------------------------------------------------------------
 
-# 5.7.20 (2022-01-12)
+# 5.7.20 (2022-01-13)
 
 ### 🐣新特性
 * 【core   】     增加对null值友好的groupingBy操作的Collector实现，可指定map类型（pr#498@Gitee）
 * 【core   】     增加KetamaHash（issue#2084@Github）
 * 【crypto 】     增加SignUtil
+* 【json   】     JSONGetter增加getBeanList方法
 * 
 ### 🐞Bug修复
 * 【core   】     修复setter重载导致匹配错误（issue#2082@Github）

hutool-core/src/main/java/cn/hutool/core/io/file/FileWriter.java

@@ -16,7 +16,6 @@ import java.io.InputStream;
 import java.io.OutputStreamWriter;
 import java.io.PrintWriter;
 import java.nio.charset.Charset;
-import java.util.Collection;
 import java.util.Map;
 import java.util.Map.Entry;
 
@@ -165,7 +164,7 @@ public class FileWriter extends FileWrapper {
 	 * @return 目标文件
 	 * @throws IORuntimeException IO异常
 	 */
-	public <T> File writeLines(Collection<T> list) throws IORuntimeException {
+	public <T> File writeLines(Iterable<T> list) throws IORuntimeException {
 		return writeLines(list, false);
 	}
 
@@ -177,7 +176,7 @@ public class FileWriter extends FileWrapper {
 	 * @return 目标文件
 	 * @throws IORuntimeException IO异常
 	 */
-	public <T> File appendLines(Collection<T> list) throws IORuntimeException {
+	public <T> File appendLines(Iterable<T> list) throws IORuntimeException {
 		return writeLines(list, true);
 	}
 
@@ -190,7 +189,7 @@ public class FileWriter extends FileWrapper {
 	 * @return 目标文件
 	 * @throws IORuntimeException IO异常
 	 */
-	public <T> File writeLines(Collection<T> list, boolean isAppend) throws IORuntimeException {
+	public <T> File writeLines(Iterable<T> list, boolean isAppend) throws IORuntimeException {
 		return writeLines(list, null, isAppend);
 	}
 
@@ -205,12 +204,13 @@ public class FileWriter extends FileWrapper {
 	 * @throws IORuntimeException IO异常
 	 * @since 3.1.0
 	 */
-	public <T> File writeLines(Collection<T> list, LineSeparator lineSeparator, boolean isAppend) throws IORuntimeException {
+	public <T> File writeLines(Iterable<T> list, LineSeparator lineSeparator, boolean isAppend) throws IORuntimeException {
 		try (PrintWriter writer = getPrintWriter(isAppend)) {
 			for (T t : list) {
 				if (null != t) {
-					writer.print(t);
 					printNewLine(writer, lineSeparator);
+					writer.print(t);
+					
 					writer.flush();
 				}
 			}

hutool-json/src/main/java/cn/hutool/json/JSONGetter.java

@@ -9,6 +9,7 @@ import cn.hutool.core.util.StrUtil;
 
 import java.time.LocalDateTime;
 import java.util.Date;
+import java.util.List;
 import java.util.Optional;
 
 /**
@@ -113,6 +114,21 @@ public interface JSONGetter<K> extends OptNullBasicTypeFromObjectGetter<K> {
 		return (null == obj) ? null : obj.toBean(beanType);
 	}
 
+	/**
+	 * 从JSON中直接获取Bean的List列表<br>
+	 * 先获取JSONArray对象，然后转为Bean的List
+	 *
+	 * @param <T>      Bean类型
+	 * @param key      KEY
+	 * @param beanType Bean类型
+	 * @return Bean的List，如果值为null或者非JSONObject类型，返回null
+	 * @since 5.7.20
+	 */
+	default <T> List<T> getBeanList(K key, Class<T> beanType) {
+		final JSONArray jsonArray = getJSONArray(key);
+		return (null == jsonArray) ? null : jsonArray.toList(beanType);
+	}
+
 	@Override
 	default Date getDate(K key, Date defaultValue) {
 		// 默认转换