实现Comparator接口-->Collections.sort(List, new ComparaObject());
public class ComparaObject implements Comparator<User>{
@Override
public int compare(User o1, User o2) {
String user1_name = StringUtil.toHanyuPinyin(o1.getName());
String user2_name = StringUtil.toHanyuPinyin(o2.getName());
int b_photo = o1.getIsHavePhoto().compareTo(o2.getIsHavePhoto());
int b_contact = o1.getIsContact().compareTo(o2.getIsContact());
int b_name = user1_name.compareTo(user2_name);
if (b_photo ==0) { //先按照是否有照片排序
if(b_contact == 0) {//再按照是否是联系人排
return b_name;
}else {
return -b_contact; //最后按照name的拼音升序
}
}else {
return -b_photo;
}
}
}
工具类
//调用
List<SortDescription> sortDesList = new ArrayList<SortDescription>();
sortDesList.add(new SortDescription("isHavePhoto",false)); //根据isHavePhoto降序
sortDesList.add(new SortDescription("isContact",false)); //根据isContact降序
sortDesList.add(new SortDescription("name",true)); //根据name升序
Collections.sort(users, new ComparaObject(sortDesList));
//实现
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Comparator;
import java.util.List;
import net.sourceforge.pinyin4j.PinyinHelper;
import net.sourceforge.pinyin4j.format.HanyuPinyinCaseType;
import net.sourceforge.pinyin4j.format.HanyuPinyinOutputFormat;
import net.sourceforge.pinyin4j.format.HanyuPinyinToneType;
import net.sourceforge.pinyin4j.format.HanyuPinyinVCharType;
import net.sourceforge.pinyin4j.format.exception.BadHanyuPinyinOutputFormatCombination;
class SortDescription {
private String fildName;
private Boolean isAsc;
public SortDescription(String fildName, Boolean isAsc) {
super();
this.fildName = fildName;
this.isAsc = isAsc;
}
public String getFildName() {
return fildName;
}
public void setFildName(String fildName) {
this.fildName = fildName;
}
public Boolean getIsAsc() {
return isAsc;
}
public void setIsAsc(Boolean isAsc) {
this.isAsc = isAsc;
}
}
public class ComparaObject implements Comparator<Object>{
private List<SortDescription> sortDesList;
public List<SortDescription> getSortDesList() {
return sortDesList;
}
public void setSortDesList(List<SortDescription> sortDesList) {
this.sortDesList = sortDesList;
}
public ComparaObject(List<SortDescription> sortDesList) {
super();
this.sortDesList = sortDesList;
}
int comparaTwoObj(SortDescription des, Object o1, Object o2) {
String value1 = null;
String value2 = null;
try {
value1 = hendleReturnValue(o1, des.getFildName());
value2 = hendleReturnValue(o2, des.getFildName());
} catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
int compara = toHanyuPinyin(value1).compareTo(toHanyuPinyin(value2));
return compara;
}
private String hendleReturnValue(Object obj, String fildName) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException {
String methodName = "get" + fildName.substring(0, 1).toUpperCase() + fildName.substring(1);
Object obj1 = InvokeWithObj(obj, methodName, null);
if (obj1 instanceof String) {
return (String) obj1;
}else {
return obj1 + "";
}
}
@Override
public int compare(Object o1, Object o2) {
for (int i = 0; i < this.sortDesList.size(); i++) {
SortDescription des = this.sortDesList.get(i);
int compara = comparaTwoObj(des, o1, o2);
if (compara != 0) {
return des.getIsAsc() == true ? compara : -compara;
}else {
continue;
}
}
return 0;
}
//根据对象,方法名,参数调用方法
private Object InvokeWithObj (Object obj, String methodName, Object ...args) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException {
Class prams[] = getPramsClass(args);
Method method = getKindOfClassMethod(obj.getClass(),methodName,prams);
method.setAccessible(true); //设置可以访问私有方法
Object returnObj = method.invoke(obj, args);
return returnObj;
}
//根据参数对象数组获取参数类数组
private Class[] getPramsClass ( Object ...args){
if (args == null) {
return null;
}
Class[] prams = new Class[args.length];
for (int i = 0; i < args.length; i++) {
prams[i] = args[i].getClass();
}
return prams;
}
//获取类的指定方法,子类没有向父类找
private Method getKindOfClassMethod(Class cls, String methodName, Class[] prams) {
Method method = null;
Class clazz = cls;
while (method == null && clazz != Object.class) {
try {
method = clazz.getDeclaredMethod(methodName, prams);
} catch (NoSuchMethodException e) {
e.printStackTrace();
clazz = clazz.getSuperclass();
}
}
return method;
}
private String toHanyuPinyin(String ChineseLanguage){
if (ChineseLanguage == null) {
return "";
}
char[] cl_chars = ChineseLanguage.trim().toCharArray();
String hanyupinyin = "";
HanyuPinyinOutputFormat defaultFormat = new HanyuPinyinOutputFormat();
defaultFormat.setCaseType(HanyuPinyinCaseType.LOWERCASE);// 输出拼音全部小写
defaultFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);// 不带声调
defaultFormat.setVCharType(HanyuPinyinVCharType.WITH_V) ;
try {
for (int i=0; i<cl_chars.length; i++){
if (String.valueOf(cl_chars[i]).matches("[\u4e00-\u9fa5]+")){// 如果字符是中文,则将中文转为汉语拼音
hanyupinyin += PinyinHelper.toHanyuPinyinStringArray(cl_chars[i], defaultFormat)[0];
} else {// 如果字符不是中文,则不转换
hanyupinyin += cl_chars[i];
}
}
} catch (BadHanyuPinyinOutputFormatCombination e) {
System.out.println("字符不能转成汉语拼音");
}
return hanyupinyin;
}
}
利用快速排序实现
public class JMQuickSort {
private static List<JMSortDes> sortDesList;
public List<JMSortDes> getSortDesList() {
return sortDesList;
}
public void setSortDesList(List<JMSortDes> sortDesList) {
JMQuickSort.sortDesList = sortDesList;
}
public static <T> void quickSort(List<JMSortDes> sortDesList, List<T> objects) {
JMQuickSort.sortDesList = sortDesList;
sort(objects, 0, objects.size()-1);
}
//快速排序
private static <T> void sort(List<T> objects, int left, int right){
if (left >= right) { return; }
int i = left, j = right;
T obj = objects.get(left);
while(i < j) {
while(i < j && objectCompara(obj, objects.get(j)) <= 0) {
j--;
}
T usj = objects.get(j);
objects.remove(i);
objects.add(i, usj);
while(i < j && objectCompara(obj, objects.get(i)) >= 0) {
i++;
}
T usi = objects.get(i);
objects.remove(j);
objects.add(j, usi);
}
objects.remove(i);
objects.add(i, obj);
sort(objects, left, i-1);
sort(objects, i+1, right);
}
static int objectCompara(Object o1, Object o2) {
//大于0--->o1大
for (int i = 0; i < JMQuickSort.sortDesList.size(); i++) {
JMSortDes des = JMQuickSort.sortDesList.get(i);
int compara = comparaTwoObj(des, o1, o2);
if (compara != 0) {
return des.getIsAsc() == true ? compara : -compara;
}else {
continue;
}
}
return 0;
}
private static int comparaTwoObj(JMSortDes des, Object o1, Object o2) {
String value1 = null;
String value2 = null;
try {
value1 = hendleReturnValue(o1, des.getFildName());
value2 = hendleReturnValue(o2, des.getFildName());
} catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
int compara = toHanyuPinyin(value1).compareTo(toHanyuPinyin(value2));
return compara;
}
private static String hendleReturnValue(Object obj, String fildName) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException {
String methodName = "get" + fildName.substring(0, 1).toUpperCase() + fildName.substring(1);
Object obj1 = InvokeWithObj(obj, methodName, null);
if (obj1 instanceof String) {
return (String) obj1;
}else {
return obj1 + "";
}
}
private static String toHanyuPinyin(String ChineseLanguage){
if (ChineseLanguage == null) {
return "";
}
char[] cl_chars = ChineseLanguage.trim().toCharArray();
String hanyupinyin = "";
HanyuPinyinOutputFormat defaultFormat = new HanyuPinyinOutputFormat();
defaultFormat.setCaseType(HanyuPinyinCaseType.LOWERCASE);// 输出拼音全部小写
defaultFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);// 不带声调
defaultFormat.setVCharType(HanyuPinyinVCharType.WITH_V) ;
try {
for (int i=0; i<cl_chars.length; i++){
if (String.valueOf(cl_chars[i]).matches("[\u4e00-\u9fa5]+")){// 如果字符是中文,则将中文转为汉语拼音
hanyupinyin += PinyinHelper.toHanyuPinyinStringArray(cl_chars[i], defaultFormat)[0];
} else {// 如果字符不是中文,则不转换
hanyupinyin += cl_chars[i];
}
}
} catch (BadHanyuPinyinOutputFormatCombination e) {
System.out.println("字符不能转成汉语拼音");
}
return hanyupinyin;
}
//根据对象,方法名,参数调用方法
private static Object InvokeWithObj (Object obj, String methodName, Object ...args) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException {
Class[] prams = null;
if (args != null) {
prams = new Class[args.length];
if (args != null) {
for (int i = 0; i < args.length; i++) {
prams[i] = args[i].getClass();
}
}
}
Method method = null;
Class clazz = obj.getClass();
while (method == null && clazz != Object.class) {
try {
method = clazz.getDeclaredMethod(methodName, prams);
} catch (NoSuchMethodException e) {
e.printStackTrace();
clazz = clazz.getSuperclass();
}
}
method.setAccessible(true); //设置可以访问私有方法
Object returnObj = method.invoke(obj, args);
return returnObj;
}
}
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