JTimeUtils

import java.math.BigDecimal;
import java.text.ParseException;
import java.util.Calendar;
import java.util.GregorianCalendar;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang3.time.FastDateFormat;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.context.annotation.Scope;
import org.springframework.web.bind.annotation.RestController;

import com.google.common.collect.Lists; 

@RestController
@Scope(ConfigurableBeanFactory.SCOPE_SINGLETON)
public abstract class JTimeUtils { 

    protected FastDateFormat format = FastDateFormat.getInstance("yyyy-MM-dd"); 
    /**
     * 验证时间是否过了3个月
     * 
     * @param time
     * @return
     */
    public boolean validateTime(String time) {
        try {
            threadLocal.get().setTime(format.parse(time));
            threadLocal.get().add(Calendar.MONTH, 3 + 1);
            return (threadLocal.get().getTime().getTime() >= System.currentTimeMillis());
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return false;
    }
/**
     * 四舍五入保留1位小数
     * 
     * @param val
     * @return
     */
    public double toDouble(double val) {
        BigDecimal bigDe = new BigDecimal(val);
        return bigDe.setScale(1, BigDecimal.ROUND_HALF_UP).doubleValue();
    }

    /**
     * 要在高并发环境下能有比较好的体验， 可以使用ThreadLocal来限制GregorianCalendar只能在线程内共享，
     * 这样就避免了多线程导致的线程安全问题。
     */
    protected static ThreadLocal<GregorianCalendar> threadLocal = new ThreadLocal<GregorianCalendar>() {
        @Override
        protected GregorianCalendar initialValue() {
            return new GregorianCalendar();
        }
    };

}