时间戳转为日期

//小于10前面加0

function add(m){
　　return m<10 ? "0"+m : m;
}

function getTime(timestamp) {
　　var time = new Date(timestamp);
　　var year = time.getFullYear();
　　var month = time.getMonth()+1;
　　var day = time.getDate();
　　var hour = time.getHours();
　　var minutes = time.getMinutes();
　　var seconds = time.getSeconds();
　　return year +"-"+add(month)+"-"+add(day)+" "+add(hour)+":"+add(minutes)+":"+add(seconds);
}