diff --git a/pay-java-common/src/main/java/com/egzosn/pay/common/http/ClientHttpRequest.java b/pay-java-common/src/main/java/com/egzosn/pay/common/http/ClientHttpRequest.java
index 5cdec5e..dfcdf1a 100644
--- a/pay-java-common/src/main/java/com/egzosn/pay/common/http/ClientHttpRequest.java
+++ b/pay-java-common/src/main/java/com/egzosn/pay/common/http/ClientHttpRequest.java
@@ -154,14 +154,16 @@ public class ClientHttpRequest<T> extends HttpEntityEnclosingRequestBase impleme
         if (null == request){
             return this;
         }
-        if (request instanceof Map) {
+        if (request instanceof HttpEntity){
+            setEntity((HttpEntity)request);
+        } else if (request instanceof Map) {
             StringEntity entity = new StringEntity(getMapToParameters((Map) request), APPLICATION_FORM_URLENCODED_UTF_8);
             setEntity(entity);
         } else if (request instanceof String) {
             StringEntity entity = new StringEntity((String) request,  APPLICATION_FORM_URLENCODED_UTF_8);
             setEntity(entity);
         } else {
-            StringEntity entity = new StringEntity(JSON.toJSONString(request), APPLICATION_FORM_URLENCODED_UTF_8);
+            StringEntity entity = new StringEntity(JSON.toJSONString(request), ContentType.APPLICATION_JSON);
             setEntity(entity);
         }
 
diff --git a/pay-java-common/src/main/java/com/egzosn/pay/common/http/HttpStringEntity.java b/pay-java-common/src/main/java/com/egzosn/pay/common/http/HttpStringEntity.java
new file mode 100644
index 0000000..56fed0e
--- /dev/null
+++ b/pay-java-common/src/main/java/com/egzosn/pay/common/http/HttpStringEntity.java
@@ -0,0 +1,55 @@
+package com.egzosn.pay.common.http;
+
+import org.apache.http.entity.ContentType;
+import org.apache.http.entity.StringEntity;
+
+import java.io.UnsupportedEncodingException;
+import java.nio.charset.Charset;
+import java.nio.charset.UnsupportedCharsetException;
+import java.util.Map;
+
+import static com.egzosn.pay.common.http.UriVariables.getMapToParameters;
+
+/**
+ * 请求实体
+ *
+ * @author egan
+ * @email egzosn@gmail.com
+ * @date 2017/12/20
+ */
+public class HttpStringEntity extends StringEntity {
+
+    public HttpStringEntity(Map<String, Object> request, ContentType contentType) throws UnsupportedCharsetException {
+        super(getMapToParameters(request), contentType);
+    }
+
+    public HttpStringEntity(Map<String, Object> request, String charset) throws UnsupportedCharsetException {
+        super(getMapToParameters(request), charset);
+    }
+
+    public HttpStringEntity(Map<String, Object> request, Charset charset) {
+        super(getMapToParameters(request), charset);
+    }
+
+    public HttpStringEntity(Map<String, Object> request) throws UnsupportedEncodingException {
+        super(getMapToParameters(request));
+    }
+
+    public HttpStringEntity(String string, ContentType contentType) throws UnsupportedCharsetException {
+        super(string, contentType);
+    }
+
+    public HttpStringEntity(String string, String charset) throws UnsupportedCharsetException {
+        super(string, charset);
+    }
+
+    public HttpStringEntity(String string, Charset charset) {
+        super(string, charset);
+    }
+
+    public HttpStringEntity(String string) throws UnsupportedEncodingException {
+        super(string);
+    }
+
+
+}