"{\"access_token\":\"5RtqZYttHHb3hoLfvayvkV6yFabyb67Re3KFThqsuHHy1DbjB6d3-Ras4jz0at2b20FoiJIhSFc5lS6bbFrlbjt9eX1JZareUh98TBJFOnI\",\"expires_in\":7200,\"refresh_token\":\"5KNZMgScv54mk9-jqidBLIM26epyRSk2oxq4zwDlgkEBBJVtZD2A6cWUH_j8zuVWPVaVLOZtW5N9VjXpnVJQKWqpvN-yYrggQcfguE6lfu0\",\"openid\":\"ok8M3wez1xhN8bER2QLLRUWkbbqA\",\"scope\":\"snsapi_userinfo\"}",
比如这个json数据,在java中怎么获得其中openid的值
米琪卡哇伊
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