[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; /dO&r'!:
} W* YfyM
int i1=l; ][.1b@)qV
int i2=mid+1; ^T"A9uaG
for(int cur=l;cur<=r;cur++){ E3'6lv'
if(i1==mid+1) {Su]P {oJ
data[cur]=temp[i2++]; $>+-=XMVB
else if(i2>r) 0\/7[nwS
data[cur]=temp[i1++]; T]+*}C
else if(temp[i1] data[cur]=temp[i1++]; ]HRE-g
else 0GB6.Ggft
data[cur]=temp[i2++]; $*tuv?
} %j'lWwi
} #ws6z`mt
REa%kU
} 79&Mc,69
YO=;)RA
改进后的归并排序: SU*P@?:/}
nC z[#t
package org.rut.util.algorithm.support; ]M_)f
Vi]D](^!
import org.rut.util.algorithm.SortUtil; RD~QNj9,T
z*FlZLHY
/** Ih{~?(V$
* @author treeroot 2)G ZU
* @since 2006-2-2 X;-,3dy
* @version 1.0 a].Bn#AH!C
*/ ]UMwpL&rY
public class ImprovedMergeSort implements SortUtil.Sort { ;$Wa=wHb
y};qo'dlt
private static final int THRESHOLD = 10; 9,,1\0-T*
OuX/BMG
/* j,Mp["X&
* (non-Javadoc) Cu>pql<O
* _ TUw0:&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vWow^g
*/ MjHeUf
public void sort(int[] data) { ]TGJ|X
int[] temp=new int[data.length]; :D&QGw(n
mergeSort(data,temp,0,data.length-1); ^ K/B[8
} `W"-jz5#=
&%^[2^H8"
private void mergeSort(int[] data, int[] temp, int l, int r) { DRw%~
int i, j, k; l.C{Ar
int mid = (l + r) / 2; O'(qeN<^w
if (l == r) f3nib8B'
return; i2y?CI
if ((mid - l) >= THRESHOLD) 2t_E\W7w+
mergeSort(data, temp, l, mid); A=BpB}b
else T%Z`:mf
insertSort(data, l, mid - l + 1); jAF DkqH
if ((r - mid) > THRESHOLD) 7/Ew(X8Fs
mergeSort(data, temp, mid + 1, r); CvlAn7r,@
else ofS9h*wrJ
insertSort(data, mid + 1, r - mid); csYICLj
XfB;^y=u8
for (i = l; i <= mid; i++) { 2 !{P<
temp = data; y#r=^r]l)
} qD2<-E&M/
for (j = 1; j <= r - mid; j++) { U;ev3
temp[r - j + 1] = data[j + mid]; #LF_*a0v
} 1`b?nX
int a = temp[l]; 75<E0O
int b = temp[r]; u K 8r
for (i = l, j = r, k = l; k <= r; k++) { i^j{l_-JE
if (a < b) { NmK%k jCx
data[k] = temp[i++]; 28zt.9
a = temp; d d8^V_Kx
} else { /K'Kx
data[k] = temp[j--]; iPxSVH[
b = temp[j]; KPKby?qQ^
} dBCg$Rud&
} K{HdqmxL.I
} bvZmozbD
}Dk_gom_
/** L{aT"Of{X
* @param data }eBy p
* @param l 3&_(D)+
* @param i UT"L5{c
*/ A9F Z`
private void insertSort(int[] data, int start, int len) { @"Do8p!*(6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )TG\P,H9
} {d=y9Jb^
} V5R``Tp
} D4_D{\xhO
} +BmA4/P$
df}B:?Ew.
堆排序： fyT!/
IiSO{
package org.rut.util.algorithm.support; 3vDV
;9d(GP}eE
import org.rut.util.algorithm.SortUtil; V.;0F%zks5
7M5HIK6_
/** T7&itgEYG/
* @author treeroot <4^a(Zh
* @since 2006-2-2 @ -g^R4e<
* @version 1.0 :y0'[LV
*/ iQ~cG[6
public class HeapSort implements SortUtil.Sort{ DtyT8kr
h1J-AfV
/* (non-Javadoc) .3oFSc`q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LTG/gif[u
*/ RDk{;VED{
public void sort(int[] data) { F^KoEWj[H
MaxHeap h=new MaxHeap(); e(j"u;=
h.init(data); iQS?LksQX
for(int i=0;i h.remove(); h(jg7R
System.arraycopy(h.queue,1,data,0,data.length); %/s:G)
} Onby=Y o6
DH@*Oz-
private static class MaxHeap{ P6;L\9=H<
luAhyEp
void init(int[] data){ +n1}({7m
this.queue=new int[data.length+1]; *COr^7Kf5
for(int i=0;i queue[++size]=data; QZ%_hvY[%>
fixUp(size); 5h1FvJg
} o{m$b2BW
} 2i8'*L+j
}4\>q$8'
private int size=0; X=_N7!
;\(wJ{u?Y
private int[] queue; \Ui8Sgeei
v:<u0B-)$
public int get() { j =[Td
return queue[1]; g7#_a6
} ,!PNfJA2
$:F]O$A
public void remove() { *m2J$9q
SortUtil.swap(queue,1,size--); N!^U{;X7/
fixDown(1); TC"mP!1
} ?5"~V^L3
file://fixdown F6YMcdU
private void fixDown(int k) { sm/l'e
int j; ?zKDPBj
while ((j = k << 1) <= size) { *}cF]8c5W
if (j < size %26amp;%26amp; queue[j] j++; MZ6?s(mkx
if (queue[k]>queue[j]) file://不用交换 '9H]SEw
break; L)4TW6IUk
SortUtil.swap(queue,j,k); B4_0+K H
k = j; X|@|ZRN
} &nTB^MF
} *_3+ DF
private void fixUp(int k) { /k(0}g=\
while (k > 1) { \*1pFX#
int j = k >> 1; EivZI<<a
if (queue[j]>queue[k]) jja9:$#
break; =)(sN"%
SortUtil.swap(queue,j,k); -.i1l/FzP
k = j; ^~8l|d_
} #Z(8 vA^@
} 8iR%?5 >K
w~X1Il7A
} "~N#Jqzr:
!~"q$T>@
} UvxJ _
I4gyGg$H
SortUtil： B7_:,R.l
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package org.rut.util.algorithm; VO/" ot
dGTAZ(1W
import org.rut.util.algorithm.support.BubbleSort; 7[ *,t
import org.rut.util.algorithm.support.HeapSort; \P+lb-~\"
import org.rut.util.algorithm.support.ImprovedMergeSort; Hq< Vk.Nk
import org.rut.util.algorithm.support.ImprovedQuickSort; qbFzA i
import org.rut.util.algorithm.support.InsertSort; _hM3p
import org.rut.util.algorithm.support.MergeSort; +Q8Bin
import org.rut.util.algorithm.support.QuickSort; %v4/.4sR,;
import org.rut.util.algorithm.support.SelectionSort; %)?$82=2
import org.rut.util.algorithm.support.ShellSort; VLkK6W.u
;:a7rN"(
/** e:6R+8s2
* @author treeroot C$-IDBXK
* @since 2006-2-2 5<Xq7|Jt
* @version 1.0 &iId<.SiJ
*/ CXb)k.L
public class SortUtil { 0r.*7aXu
public final static int INSERT = 1; DU|0#z=*t5
public final static int BUBBLE = 2; A#f@0W:
public final static int SELECTION = 3; Tr-gdX ;
public final static int SHELL = 4; )1Z*kY?f!
public final static int QUICK = 5; W{?7Pn?1`
public final static int IMPROVED_QUICK = 6; *R0Ae 4
public final static int MERGE = 7; 8 U B?X
public final static int IMPROVED_MERGE = 8; =VH, i/@
public final static int HEAP = 9; 9Psy$
m+s^K{k}
public static void sort(int[] data) { htq#( M
sort(data, IMPROVED_QUICK); )CSb\
} Lg sQz(-
private static String[] name={ }pTy mAN
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *U)!9DvA
}; h7wm xa;
K#}DXq
private static Sort[] impl=new Sort[]{ BOoLs(p
new InsertSort(), $7T3wv9
new BubbleSort(), A|O7W|"W
new SelectionSort(), x{6/di
new ShellSort(), ]o6Or,ml
new QuickSort(), XA-DJ
new ImprovedQuickSort(), ;SEH|_/
new MergeSort(), (sq4
new ImprovedMergeSort(), bYYyXM
new HeapSort() 3;u*_ ]N_
}; k"LbB#Q
9axJ2J'g
public static String toString(int algorithm){ ?ye)&
return name[algorithm-1]; %S]H
} ZYos.ay
"Rf8#\Y/<
public static void sort(int[] data, int algorithm) { 2fu|X#R
impl[algorithm-1].sort(data); _iO,GT=J-
} =P<gZ-Cm
Wt"fn&R}
public static interface Sort { :CNHN2 J
public void sort(int[] data); x24
} .>Gq/[c0|
AhZ8B'Ee
public static void swap(int[] data, int i, int j) { |-bSoq7t
int temp = data; cP''
data = data[j]; L6fc_Mo.EE
data[j] = temp; b?hdWQSW7
} 7q<I7Wt
} XI~2Vzht