RetResult增加Map<String, String> attach成员变量

src/org/redkale/service/RetResult.java

@@ -5,6 +5,7 @@
  */
 package org.redkale.service;
 
+import java.util.*;
 import org.redkale.convert.json.*;
 
 /**
@@ -28,6 +29,8 @@ public class RetResult<T> {
 
     protected T result;
 
+    protected Map<String, String> attach;
+
     public RetResult() {
     }
 
@@ -99,6 +102,32 @@ public class RetResult<T> {
         return this;
     }
 
+    /**
+     * 同 setAttach
+     *
+     * @param attach attach
+     *
+     * @return RetResult
+     */
+    public RetResult<T> attach(Map<String, String> attach) {
+        this.attach = attach;
+        return this;
+    }
+
+    /**
+     * attach添加元素
+     *
+     * @param key   String
+     * @param value String
+     *
+     * @return RetResult
+     */
+    public RetResult<T> attach(String key, Object value) {
+        if (this.attach == null) this.attach = new HashMap<>();
+        this.attach.put(key, value == null ? null : String.valueOf(value));
+        return this;
+    }
+
     /**
      * 结果码 0表示成功、 非0表示错误
      *
@@ -148,6 +177,24 @@ public class RetResult<T> {
         this.result = result;
     }
 
+    /**
+     * 结果附件
+     *
+     * @return 结果附件
+     */
+    public Map<String, String> getAttach() {
+        return attach;
+    }
+
+    /**
+     * 设置结果附件
+     *
+     * @param attach Map
+     */
+    public void setAttach(Map<String, String> attach) {
+        this.attach = attach;
+    }
+
     @Override
     public String toString() {
         return JsonConvert.root().convertTo(this);