为WxError加入builder模式支持

weixin-java-common/src/main/java/me/chanjar/weixin/common/bean/result/WxError.java

@@ -5,8 +5,7 @@ import me.chanjar.weixin.common.util.json.WxGsonBuilder;
 import java.io.Serializable;
 
 /**
- * 微信错误码说明
- * http://mp.weixin.qq.com/wiki/index.php?title=全局返回码说明
+ * 微信错误码说明，请阅读： <a href="http://mp.weixin.qq.com/wiki/10/6380dc743053a91c544ffd2b7c959166.html">全局返回码说明</a>
  * @author Daniel Qian
  *
  */
@@ -54,4 +53,30 @@ public class WxError implements Serializable {
     return "微信错误: errcode=" + errorCode + ", errmsg=" + errorMsg + "\njson:" + json;
   }
 
+  public static Builder newBuilder(){
+    return new Builder();
+  }
+  
+  public static class Builder{
+    private int errorCode;
+    private String errorMsg;
+    
+    public Builder setErrorCode(int errorCode) {
+      this.errorCode = errorCode;
+      return this;
+    }
+    
+    public Builder setErrorMsg(String errorMsg) {
+      this.errorMsg = errorMsg;
+      return this;
+    }
+    
+    public WxError build(){
+      WxError wxError = new WxError();
+      wxError.setErrorCode(this.errorCode);
+      wxError.setErrorMsg(this.errorMsg);
+      return wxError;
+    }
+    
+  }
 }

weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/WxMpServiceImpl.java

@@ -483,9 +483,8 @@ public class WxMpServiceImpl implements WxMpService {
     try {
       return String.format(url, URLEncoder.encode(ticket, Charsets.UTF_8.name()));
     } catch (UnsupportedEncodingException e) {
-      WxError error = new WxError();
-      error.setErrorCode(-1);
-      error.setErrorMsg(e.getMessage());
+      WxError error = WxError.newBuilder().setErrorCode(-1)
+            .setErrorMsg(e.getMessage()).build();
       throw new WxErrorException(error);
     }
   }