1：狀態(tài)碼_http
2：java訪問（http）：國家氣象局 免費接口
3：httpClientSocket ~~~ httpSocketServer
4：httpGet ~ httpPost
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1：狀態(tài)碼_http·······························································································································································
http請求的響應(yīng)碼一般分為五類 1xx 2xx 3xx 4xx 5xx

1xx 臨時性的消息 101：當(dāng)客戶端問服務(wù)端支不支持http2.0的時候，如果支持服務(wù)端會返回 101 表示我支持http2.0 。
100：當(dāng)客戶端一個請求分多次發(fā)送給服務(wù)端的時候，就會在header里面加一個字段告訴服務(wù)端，你別急我后面還有請求，是要多個請求合并成一個請求的。服務(wù)端收到之后就會返回一個100的狀態(tài)碼跟客戶端說好的我知道了這是一個需要多個合 并成一個的請求。

2xx 成功的提示： 200本次請求操作成功了。

3xx 重定向 301是永久重定向，永久更換服務(wù)器
302臨時重定向 ，某個頁面有問題需要臨時修改
304 數(shù)據(jù)沒有變化，刷新如果服務(wù)器數(shù)據(jù)沒有返回的時候會返回。

4x