List求和

package com.bean;

import java.util.Date;

public class Hycosysfightservicemail {
	
    private String flightnumber;

    private Date actualdate;

    private String inflag;
  
    private Integer mailnum;

	private Double mailweight;
	
	   public String getFlightnumber() {
			return flightnumber;
		}

		public void setFlightnumber(String flightnumber) {
			this.flightnumber = flightnumber;
		}

		public Date getActualdate() {
			return actualdate;
		}

		public void setActualdate(Date actualdate) {
			this.actualdate = actualdate;
		}

		public String getInflag() {
			return inflag;
		}

		public void setInflag(String inflag) {
			this.inflag = inflag;
		}

		public Integer getMailnum() {
			return mailnum;
		}

		public void setMailnum(Integer mailnum) {
			this.mailnum = mailnum;
		}

		public Double getMailweight() {
			return mailweight;
		}

		public void setMailweight(Double mailweight) {
			this.mailweight = mailweight;
		}
}

package com.bean;

import java.util.Date;

public class Hyflightmanifest {
	
    private String flightnumber;

    private String inflag;

    private Date schdate;
 
	private Integer mailnum;

    private Double mailweight;

    public String getFlightnumber() {
		return flightnumber;
	}

	public void setFlightnumber(String flightnumber) {
		this.flightnumber = flightnumber;
	}

	public String getInflag() {
		return inflag;
	}

	public void setInflag(String inflag) {
		this.inflag = inflag;
	}

	public Date getSchdate() {
		return schdate;
	}

	public void setSchdate(Date schdate) {
		this.schdate = schdate;
	}

	public Integer getMailnum() {
		return mailnum;
	}

	public void setMailnum(Integer mailnum) {
		this.mailnum = mailnum;
	}

	public Double getMailweight() {
		return mailweight;
	}

	public void setMailweight(Double mailweight) {
		this.mailweight = mailweight;
	}

}

package com.main;

import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;

import com.bean.Hycosysfightservicemail;
import com.bean.Hyflightmanifest;

public class Test {

	private List<Hycosysfightservicemail> getHycosysfightservicemail() {
		List<Hycosysfightservicemail> maillist = new ArrayList<Hycosysfightservicemail>();
		Hycosysfightservicemail mialbean = new Hycosysfightservicemail();
		mialbean.setActualdate(new Date());
		mialbean.setFlightnumber("HU123");
		mialbean.setInflag("A");
		mialbean.setMailnum(new Integer("100"));
		mialbean.setMailweight(new Double("123.1"));
		maillist.add(mialbean);
		Hycosysfightservicemail mialbean2 = new Hycosysfightservicemail();
		mialbean2.setActualdate(new Date());
		mialbean2.setFlightnumber("RU123");
		mialbean2.setInflag("A");
		mialbean2.setMailnum(new Integer("200"));
		mialbean2.setMailweight(new Double("123.1"));
		maillist.add(mialbean2);
		return maillist;
	}

	private List<Hyflightmanifest> getHyflightmanifest() {
		List<Hyflightmanifest> manifestlist = new ArrayList<Hyflightmanifest>();
		Hyflightmanifest manifestbean = new Hyflightmanifest();
		manifestbean.setSchdate(new Date());
		manifestbean.setFlightnumber("HU123");
		manifestbean.setInflag("A");
		manifestbean.setMailnum(new Integer("400"));
		manifestbean.setMailweight(new Double("27.9"));
		manifestlist.add(manifestbean);
		Hyflightmanifest manifestbean2 = new Hyflightmanifest();
		manifestbean2.setSchdate(new Date());
		manifestbean2.setFlightnumber("CZ123");
		manifestbean2.setInflag("A");
		manifestbean2.setMailnum(new Integer("1000"));
		manifestbean2.setMailweight(new Double("27.9"));
		manifestlist.add(manifestbean2);
		return manifestlist;
	}

	private Hyflightmanifest findAndRemoveFromList2(
			List<Hyflightmanifest> list2, Hycosysfightservicemail mail) {
		for (Iterator<Hyflightmanifest> iterator = list2.iterator(); iterator
				.hasNext();) {
			Hyflightmanifest hyflightmanifest = (Hyflightmanifest) iterator
					.next();
			if (hyflightmanifest.getFlightnumber().equals(
					mail.getFlightnumber())
					&& hyflightmanifest.getInflag().equals(mail.getInflag())
					&& hyflightmanifest.getSchdate().getTime() == mail
							.getActualdate().getTime()) {
				iterator.remove();
				return hyflightmanifest;
			}
		}
		return null;
	}

	public static void main(String[] args) {
		List<Hycosysfightservicemail> list3 = new ArrayList<Hycosysfightservicemail>();
		Test test = new Test();
		List<Hycosysfightservicemail> list1 = test.getHycosysfightservicemail();
		List<Hyflightmanifest> list2 = test.getHyflightmanifest();

		for (Iterator<Hycosysfightservicemail> iterator = list1.iterator(); iterator.hasNext();) {
			Hycosysfightservicemail hycosysfightservicemail = (Hycosysfightservicemail) iterator
					.next();
			Hyflightmanifest hyflightmanifest = test.findAndRemoveFromList2(list2, hycosysfightservicemail);
			// 有则相加 
			if(null != hyflightmanifest){
				Hycosysfightservicemail mailbean3 = new Hycosysfightservicemail();
				mailbean3.setFlightnumber(hycosysfightservicemail.getFlightnumber());
				mailbean3.setInflag(hycosysfightservicemail.getInflag());
				mailbean3.setActualdate(hycosysfightservicemail.getActualdate());
				mailbean3.setMailnum(hycosysfightservicemail.getMailnum()+ hyflightmanifest.getMailnum());
				mailbean3.setMailweight(hycosysfightservicemail.getMailweight()+ hyflightmanifest.getMailweight());
				list3.add(mailbean3);
			// 无则直接加入list3 
			}else{
				list3.add(hycosysfightservicemail);
			}
		}
		// 把list2剩下的加入list3 
		for(Iterator<Hyflightmanifest> iterator= list2.iterator(); iterator.hasNext();){
			Hyflightmanifest hyflightmanifest = (Hyflightmanifest)iterator.next();
			Hycosysfightservicemail mailbean = new Hycosysfightservicemail();
			mailbean.setFlightnumber(hyflightmanifest.getFlightnumber());
			mailbean.setInflag(hyflightmanifest.getInflag());
			mailbean.setActualdate(hyflightmanifest.getSchdate());
			mailbean.setMailnum(hyflightmanifest.getMailnum());
			mailbean.setMailweight(hyflightmanifest.getMailweight());
			list3.add(mailbean);
		}
		
		for (Iterator<Hycosysfightservicemail> iterator = list3.iterator(); iterator.hasNext();) {
			Hycosysfightservicemail hycosysfightservicemail = (Hycosysfightservicemail) iterator
					.next();
			System.out.println("航班号:" + hycosysfightservicemail.getFlightnumber());
			System.out.println("日期:" + hycosysfightservicemail.getActualdate());
			System.out.println("进出港:" + hycosysfightservicemail.getInflag());
			System.out.println("邮件数：" + hycosysfightservicemail.getMailnum());
			System.out.println("邮件重量：" + hycosysfightservicemail.getMailweight());
			System.out.println("----------------------------------------------------------");
		}
		
		

	}

}