对象的操作_JAVA_编程开发_程序员俱乐部

class="java" name="code">

public class TestObj {
	private String title ;
	private String value;
	public String getTitle() {
		return title;
	}
	public void setTitle(String title) {
		this.title = title;
	}
	public String getValue() {
		return value;
	}
	public void setValue(String value) {
		this.value = value;
	}
	
	
}

import java.util.List;

public class Wmap {
	private String key;
	private List<TestObj> value;

	public String getKey() {
		return key;
	}

	public void setKey(String key) {
		this.key = key;
	}

	public List<TestObj> getValue() {
		return value;
	}

	public void setValue(List<TestObj> value) {
		this.value = value;
	}



}

import java.util.ArrayList;
import java.util.List;

public class Distinct {

	public static void main(String[] args) {
		// ------------------------------------------- 准备数据
		TestObj tobj1 = new TestObj();
		tobj1.setTitle("tttt");
		tobj1.setValue("1");

		TestObj tobj2 = new TestObj();
		tobj2.setTitle("qqq");
		tobj2.setValue("2");
		
		TestObj tobj3 = new TestObj();
		tobj3.setTitle("www");
		tobj3.setValue("3");

		List<TestObj> lo = new ArrayList<TestObj>();
		lo.add(tobj1);
		lo.add(tobj1);
		lo.add(tobj1);
		lo.add(tobj2);
		lo.add(tobj2);
		lo.add(tobj3);
		// ------------------------------------------- 挑出value不同的对象
		List<TestObj> lo2 = lo;
		List<TestObj> lod = new ArrayList<TestObj>();
		lod.add(lo2.get(0));
		for (int a = 0; a < lo2.size(); a++) {
			for (int b = 0, c = 0; b < lod.size(); b++) {
				if (!lo2.get(a).getValue().equals(lod.get(b).getValue())) {
					c++;
				}
				if (c == lod.size()) {
					lod.add(lo2.get(a));
					break;
				}
			}
		}
		System.out.println(lod.size());

		// ------------------------------------------统一放进一个伪Map中，key是不同的值，value是list对象集合
		List<Wmap> lm = new ArrayList<Wmap>();
		// 初始化MAP
		for (int d = 0; d < lod.size(); d++) {
			Wmap wmap = new Wmap();
			wmap.setKey(lod.get(d).getValue());
			wmap.setValue(new ArrayList<TestObj>());
			lm.add(wmap);
		}

		for (int e = 0; e < lod.size(); e++) {
			for (int f = 0; f < lo2.size(); f++) {
				if (lo2.get(f).getValue().equals(lod.get(e).getValue())) {
					for(int g = 0 ; g <lm.size();g++ ){
						if(lo2.get(f).getValue().equals(lm.get(g).getKey())){
							lm.get(g).getValue().add(lo2.get(f));
						}
					}
				}

			}
		}
		
		System.out.println(lm);
		
		

	}

}