issue #39 添加oauth2的支持

weixin-java-mp/src/main/java/me/chanjar/weixin/mp/bean/result/WxMpOAuth2AccessToken.java

@@ -0,0 +1,64 @@
+package me.chanjar.weixin.mp.bean.result;
+
+import me.chanjar.weixin.common.util.json.WxGsonBuilder;
+
+/**
+ * Created by qianjia on 14/11/26.
+ */
+public class WxMpOAuth2AccessToken {
+
+  private String accessToken;
+
+  private int expiresIn = -1;
+
+  private String refreshToken;
+
+  private String openId;
+
+  private String scope;
+
+  public String getRefreshToken() {
+    return refreshToken;
+  }
+
+  public void setRefreshToken(String refreshToken) {
+    this.refreshToken = refreshToken;
+  }
+
+  public String getOpenId() {
+    return openId;
+  }
+
+  public void setOpenId(String openId) {
+    this.openId = openId;
+  }
+
+  public String getScope() {
+    return scope;
+  }
+
+  public void setScope(String scope) {
+    this.scope = scope;
+  }
+
+  public String getAccessToken() {
+    return accessToken;
+  }
+
+  public void setAccessToken(String accessToken) {
+    this.accessToken = accessToken;
+  }
+
+  public int getExpiresIn() {
+    return expiresIn;
+  }
+
+  public void setExpiresIn(int expiresIn) {
+    this.expiresIn = expiresIn;
+  }
+
+  public static WxMpOAuth2AccessToken fromJson(String json) {
+    return WxGsonBuilder.create().fromJson(json, WxMpOAuth2AccessToken.class);
+  }
+
+}