获取主题
## 论坛首页
```
请求地址 论坛/misc/system/
```
### 请求参数
| 参数名 | 类型 | 说明 | 是否必填 |
|-------|------|-----|----------|
| cmd | string | 固定值 xy.bbs.subject.one | 是 |
| id| int | 主题编号 | 是 |
### 返回值
``` json
{
"code":1,
"data":{
"subject_title":"xxx",//主题标题
"subject_date":"xxx",//发布时间
"content":"xxx",//内容
"user_head":"xxx",//发帖人头像
"subject_lable":"xxx",//精 火
"subject_see":"xxx",//打开次数
"subject_accessory":"xxx",//附件列表
"subject_user":"xxx",//用户编号
"subject_username":"xxx",//用户账户
"subject_reply":"xxx",//回复数
"subject_firstName":"xxx",//一级名称
"subject_secondName":"xxx",//二级名称
"subject_thirdName":"xxx",//三级名称
"subject_third":"xxx",//三级编号
"subject_second":"xxx",//二级编号
"subject_first":"xxx",//一级编号
},
"msg":""
}
```