Gson解析Json字符串出现异常:Expected a BEGIN_ARRAY but was STRING at line 1 column 107 $的解决方法
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最近在做登陆功能,需要解析服务器返回的json数据,在解析时我用了Google自带的Gson解析器,用bean类保存解析出来的数据,为确保bean类格式的正确性,用AndroidStudio插件GsonFormat实现,但是解析一直报错:
“Expected a BEGIN_ARRAY but was STRING at line 1 column 107 $........”,
在网上查了半天,网友提供的方法试了很多,虽然报的异常一模一样,但是问题还是没有解决。弄了两天,忽然发现,原来是后台传给我的json格式有问题,修改之后,问题解决。
修改之前的json :
{"success":false,"loginMsg":"用户名或密码不正确","sessionId":"","menu":""}就是menu的值格式错误,这时menu值为空,解析之后得到的空字符是String类型的值,而我根据后台给我有值的menu在bean中将menu定义为List,所以报错。修改之后的json:{"success":false,"loginMsg":"用户名或密码不正确","sessionId":"","menu":[]}头大,这样的错误真心不好发现,对于我这样的新手,由于不常见,就拿过来让遇到同样问题的参考一下,及时干掉bug!
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