【我的Android进阶之旅】解决Jackson解析json字符串报错：no single-String constructor/factory method

一、问题描述今天在使用Jackson解析json字符串的时候，报了如下所示的错误09-07 09:08:11.013 13311-13418/com.oyp.data.demo E/com.oyp.bigdata.common.utils.JSONUtil: com.fasterxml.jackson.databind.JsonMappingException: Can not instantiate value of type [simple type, class com.oyp.bigdata.collector.config.FilterInfoBean] from String value ('k'); no single-String constructor/factory method at [Source: [B@b8ddf88; line: 1, column: 1], jsonStr:"k":"filter_key","isVisible":true,"description":"功能开关", "v":[{"functionName":"func_test1","packageName":"packageName1"}, {"functionName":"func_test2","packageName":"packageName2"}]}, classType:com.oyp.bigdata.collector.config.FilterInfoBean