Guava学习

import java.util.Collections;import java.util.Comparator;import java.util.List;import com.google.common.base.Joiner;import com.google.common.base.Splitter;import com.google.common.collect.ComparisonChain;import com.google.common.collect.Lists;import com.google.common.primitives.Ints;/** *  *//** * @author zhanglong * */public class GuavaTest {/** * @param args */public static void main(String[] args) {//用，来连接List<String> list = Lists.newArrayList();list.add(null);list.add("zhanglong");Stringjoined = Joiner.on(",").useForNull("NA").join(list); //对null做处理，转换成NAStringjoinedSkipNull = Joiner.on(",").skipNulls().join(list); //过滤掉nullSystem.out.println(joined);System.out.println(joinedSkipNull);//分割String str = "djdjd,kdkdkd,ni,qianqian";for (String string : Splitter.on(",").split(str)) {System.out.println(string);}                //java与guava的排序        Person person1 = new Person();person1.setFirstName("zhang");person1.setSeoundName("yin");person1.setAge(26);Person person2 = new Person();person2.setFirstName("hang");person2.setSeoundName("zlon");person2.setAge(28);List<Person> listPerson = Lists.newArrayList();listPerson.add(person1);listPerson.add(person2);PersonComparator comparator = new PersonComparator();System.out.println(comparator.compare(person1, person2));Collections.sort(listPerson, new PersonComparator());for (Person person : listPerson) {System.out.println("java "+person.getFirstName());System.out.println("java "+person.getSeoundName());System.out.println("java "+person.getAge());}PersonGuava guava = new PersonGuava();System.out.println(guava.compare(person1, person2));Collections.sort(listPerson, new PersonGuava());for (Person person : listPerson) {System.out.println("guava "+person.getFirstName());System.out.println("guava "+person.getSeoundName());System.out.println("guava "+person.getAge());}}}//按照名字然后年龄排序class Person{private String firstName;private String seoundName;private int age;public String getFirstName() {return firstName;}public void setFirstName(String firstName) {this.firstName = firstName;}public String getSeoundName() {return seoundName;}public void setSeoundName(String seoundName) {this.seoundName = seoundName;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}}//javaclass PersonComparator implements Comparator<Person>{@Overridepublic int compare(Person o1, Person o2) {int result = o1.getFirstName().compareTo(o2.getFirstName());if(result != 0){return result;}result = o1.getSeoundName().compareTo(o2.getSeoundName());if(result != 0){return result;}return Ints.compare(o1.getAge(), o2.getAge());}}//guavaclass PersonGuava implements Comparator<Person>{@Overridepublic int compare(Person o1, Person o2) {return ComparisonChain.start().compare(o1.getFirstName(), o2.getFirstName()).compare(o1.getSeoundName(), o2.getSeoundName()).compare(o1.getAge(), o2.getAge()).result();}}//public int compare(CtItemDO o1, CtItemDO o2) //if(o1.getCommission() > o2.getCommission()) return 1; //if(o1.getCommission() < o2.getCommission()) return -1; //return 0;//}