public CBConnection connect(String url, String charset) {
        this.url = url;
        this.charset = charset;
        return this;
    }
public CBConnection connect(String url, String charset) {
        this.url = url;
        this.charset = charset;
        return this;
    }
public CBConnection connect ( String url , String charset ) { this . url = url ; this . charset = charset ; return this ; }
连接地址

@param url     url
@param charset 编码
@return 连接
连接地址