测试json字符串：

{"access_token":"hkbQl5o_l67dZ7_vJRATKBwTLk9Yj5QyMuOJThAr8Baj0xWf4wxW1p4ym4iTZ3-ptWRRoVtbCNJnyjGLfed_4bB0HiqGP8v-aXOJUUk1tFs","expires_in":7200,"refresh_token":"_or_31yEp8XhxGWvrAzdWIkXfFlKjfb3iTRpfaN_3kPAVQAPLW6PaW_zmO4GSkC2R0QxqsyJrvLVbDrq4PW9JALi7S6PB8g8yWSwo-PcBqs","openid":"o7jBjwzBUESlQnlLQy_UR25BJe3o","scope":"snsapi_base"}

Java代码中获取：

JSONObject jsonObj=JSONObject.parseObject(openId);
String openid=jsonObj.getString("openid");

jsp中获取：

先后台设置：mv.addObject("tributes",JSON.toJSON("字符串"));---springMVC、（import com.alibaba.fastjson.*）

前台：JSON.parse('${tributes}');