关于 Gson 解析JSON数据。。。
1.首先,我是从服务器端传回来的JSON数据如下:
<code>{"info":"succeed","user_id":"1","user_password":"9999","user_email":"95469@qq.com","user_nicheng":"\u6817\u5b50","user_sex":"\u7537","user_phone":"13590272662","user_add":null,"user_qianming":"\u5199\u4e0a\u4e00\u53e5\u8bdd\uff0c\u54f2\u7406\u4eba\u751f\u3002__by_\u6817\u5b50"} </code>
信息大概是:info,user_id,user_password,user_email,user_nicheng,
user_sex,user_phone,user_add,user_qianming
2.然后我用 Gson 去解析以上这一段JSON,代码如下:
<code>UserBean user = new Gson().fromJson(string, UserBean.class); </code>
3.最后贴上 UserBean.class 的代码。。。
<code>public class UserBean implements IUserBean{ String info; int userId; String userEmail; String userNicheng; String userSex; String userPhone; String userAdd; String userQianming; //还有以下的 setXXX , getXXX 方法就忽略了</code>
然后问题是解析出来的 UserBean 的对象 user 中,只有info,userId是有值得,其他没有值,这是怎么回事。。。?
还有,Gson 中的fromJson方法,对我自定义的 UserBean 有什么要求吗?
回复内容:
1.首先,我是从服务器端传回来的JSON数据如下:
<code>{"info":"succeed","user_id":"1","user_password":"9999","user_email":"95469@qq.com","user_nicheng":"\u6817\u5b50","user_sex":"\u7537","user_phone":"13590272662","user_add":null,"user_qianming":"\u5199\u4e0a\u4e00\u53e5\u8bdd\uff0c\u54f2\u7406\u4eba\u751f\u3002__by_\u6817\u5b50"} </code>
信息大概是:info,user_id,user_password,user_email,user_nicheng,
user_sex,user_phone,user_add,user_qianming
2.然后我用 Gson 去解析以上这一段JSON,代码如下:
<code>UserBean user = new Gson().fromJson(string, UserBean.class); </code>
3.最后贴上 UserBean.class 的代码。。。
<code>public class UserBean implements IUserBean{ String info; int userId; String userEmail; String userNicheng; String userSex; String userPhone; String userAdd; String userQianming; //还有以下的 setXXX , getXXX 方法就忽略了</code>
然后问题是解析出来的 UserBean 的对象 user 中,只有info,userId是有值得,其他没有值,这是怎么回事。。。?
还有,Gson 中的fromJson方法,对我自定义的 UserBean 有什么要求吗?
info有值因为JSON里有info
其他没有值是因为class的member在JSON里不存在(GSON不会把JSON的user_email填到java的userEmail)
userId有值因为.. java的int一定有一个值
gson没啥特别的坑.. 有个无参数无依赖的构造函数就能用 (也就是说非static的inner class不可以. 如果没有就要自己写一个InstanceCreator)
<code>public class Book implements Serializable { @SerializedName("jcId") private String bookId; ... 省略set get 方法 } json 串里是jcId, 用注解和bookId 就可以绑定在一起呢</code>

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