add methods

hutool-http/src/test/java/cn/hutool/http/Issue2531Test.java

@@ -0,0 +1,28 @@
+package cn.hutool.http;
+
+import cn.hutool.core.lang.Console;
+import cn.hutool.core.map.MapUtil;
+import org.junit.Ignore;
+import org.junit.Test;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class Issue2531Test {
+
+	@Test
+	@Ignore
+	public void getTest(){
+		final Map<String,String> map = new HashMap<>();
+		map.put("str","+123");
+
+		final String queryParam = MapUtil.join(map, "&", "=");//返回str=+123
+		Console.log(queryParam);
+
+		final HttpRequest request = HttpUtil.createGet("http://localhost:8888/formTest?" + queryParam);
+		//request.setUrl("http://localhost:8888/formTest" + "?" + queryParam);
+		//noinspection resource
+		final HttpResponse execute = request.execute();
+		Console.log(execute.body());
+	}
+}