!288 特殊符号工具类

Merge pull request !288 from dazer007/v5-dev

hutool-extra/src/test/java/cn/hutool/extra/servlet/ServletUtilTest.java

@@ -0,0 +1,30 @@
+package cn.hutool.extra.servlet;
+
+import org.junit.Test;
+
+import javax.servlet.http.HttpServletResponse;
+import java.io.ByteArrayInputStream;
+import java.nio.charset.StandardCharsets;
+
+/**
+ * ServletUtil工具类测试
+ * @author dazer
+ * @date 2021/3/24 15:02
+ * @see ServletUtil
+ */
+public class ServletUtilTest {
+	@Test
+	public void writeTest() {
+		HttpServletResponse response = null;
+		byte[] bytes = new String("地球是我们共同的家园，需要大家珍惜.").getBytes(StandardCharsets.UTF_8);
+
+		//下载文件
+		// 这里没法直接测试，直接写到这里，方便调用；
+		if (response != null) {
+			String fileName = "签名文件.pdf";
+			String contentType = "application/pdf";// application/octet-stream、image/jpeg、image/gif
+			response.setCharacterEncoding(StandardCharsets.UTF_8.name()); // 必须设置否则乱码; 但是 safari乱码
+			ServletUtil.write(response, new ByteArrayInputStream(bytes), contentType, fileName);
+		}
+	}
+}