自己写的一个获取时间段的工具类

可以获取当前时间前5min 10min 30min 60min 1day的时间
方便开发时使用到时间段的时候调用

package com.struct;

import java.text.SimpleDateFormat;
import java.util.Calendar;

public class Str_Time {

    Calendar ca=Calendar.getInstance();
    
    String year = ca.get(Calendar.YEAR) + "";
    String month = (ca.get(Calendar.MONTH) + 1) < 10 ? "0"
            + (ca.get(Calendar.MONTH) + 1) : ca.get(Calendar.MONTH) + 1 + "";
    String date = (ca.get(Calendar.DATE)) < 10 ? "0" + ca.get(Calendar.DATE)
            : ca.get(Calendar.DATE) + "";
    String hour = (ca.get(Calendar.HOUR_OF_DAY) < 10 ? "0"
            + ca.get(Calendar.HOUR_OF_DAY) : ca.get(Calendar.HOUR_OF_DAY) + "");
    String minute = (ca.get(Calendar.MINUTE) < 10 ? "0"
            + ca.get(Calendar.MINUTE) : ca.get(Calendar.MINUTE) + "");
    String second = (ca.get(Calendar.SECOND) < 10 ? "0"
            + ca.get(Calendar.SECOND) : ca.get(Calendar.SECOND) + "");
    
    //获取当前年月日，小时分钟秒，并按照需求格式化为 2016-07-08 12:01:01这种格式
    private SimpleDateFormat SDF = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

    public String getFiveMinTime() {
        Calendar ca=Calendar.getInstance();
        int now = ca.get(Calendar.MINUTE);
        ca.set(Calendar.MINUTE, now - 5);
        String date = SDF.format(ca.getTime());
        return date;
    }//获取当前时间前五分钟
    
    public String getTenMinTime(){
        Calendar ca=Calendar.getInstance();
        int now = ca.get(Calendar.MINUTE);
        ca.set(Calendar.MINUTE, now - 10);
        String date = SDF.format(ca.getTime());
        return date;
    }//获取当前时间前十分钟
    
    public String get30MinTime(){
        Calendar ca=Calendar.getInstance();
        int now = ca.get(Calendar.MINUTE);
        ca.set(Calendar.MINUTE, now - 30);
        String date = SDF.format(ca.getTime());
        return date;
    }//获取当前时间前半小时
    
    public String get60MinTime(){
        Calendar ca=Calendar.getInstance();
        int now = ca.get(Calendar.MINUTE);
        ca.set(Calendar.MINUTE, now - 60);
        String date = SDF.format(ca.getTime());
        return date;
    }//获取当前时间前一小时
    
    public String getOneDayTime(){
        Calendar ca=Calendar.getInstance();
        int now = ca.get(Calendar.DATE);
        ca.set(Calendar.DATE, now - 1);
        String date = SDF.format(ca.getTime());
        return date;
    }//获取当前时间前一天
    

    public String getNowTime() {
        Calendar ca=Calendar.getInstance();
        String date = SDF.format(ca.getTime());
        return date;
    }//获取当前时间

    public String getYear() {
        return year;
    }

    public String getMonth() {
        return month;
    }

    public String getDate() {
        return date;
    }

    public String getHour() {
        return hour;
    }

    public String getMinute() {
        return minute;
    }

    public String getSecond() {
        return second;
    }
}