[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; n#^ii/H
} z"P/Geb:O
int i1=l; 'S%H"W\
int i2=mid+1; %z~=Jz^
for(int cur=l;cur<=r;cur++){ L Q0e@5
if(i1==mid+1) "fu:hHq
data[cur]=temp[i2++]; .F},Z[a&
else if(i2>r) qWM+!f
data[cur]=temp[i1++]; %'OY
else if(temp[i1] data[cur]=temp[i1++]; Jb*E6-9G
else !|\l*
data[cur]=temp[i2++]; F:N8{puq5
} `vZX"+BAh
} Y'C1L4d
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} lhC hk7l
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改进后的归并排序: -}_1f[b
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package org.rut.util.algorithm.support; pO92cGJ8
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import org.rut.util.algorithm.SortUtil; k(he<-GF\
jn(%v]
/** F1meftK
* @author treeroot 9y&bKB2,
* @since 2006-2-2 J6Vx7
* @version 1.0 _"*}8{|
*/ 6H=gura&
public class ImprovedMergeSort implements SortUtil.Sort { ;5DDV6
\PWH(E9
private static final int THRESHOLD = 10; Wdi`ZE
0SDnMij&bf
/* #%EHcgF
* (non-Javadoc) 'o~gT ;T#
* (x fN=Te,-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B"8jEYT5
*/ T'{9!By,P
public void sort(int[] data) { 1yVhO2`7]
int[] temp=new int[data.length]; w2db=9
mergeSort(data,temp,0,data.length-1); v7n@CWnN
} F1A40h7R$Y
!Au#j^5K-o
private void mergeSort(int[] data, int[] temp, int l, int r) { Q(36RX%@
int i, j, k; V';l H2
int mid = (l + r) / 2; o7t{?|
if (l == r) 5owK2
return; Lw2VdFi>E&
if ((mid - l) >= THRESHOLD) rr,w/[
mergeSort(data, temp, l, mid); &r\8VEZq"
else \W]gy_=D{
insertSort(data, l, mid - l + 1); .cbC2t95
if ((r - mid) > THRESHOLD) YS_3Cq
mergeSort(data, temp, mid + 1, r); 2vWn(6`
else Q8MIpa!:
insertSort(data, mid + 1, r - mid); 7Ja*T@ !h
;tSAQ
for (i = l; i <= mid; i++) { j+@3.^vK
temp = data; AJm$(3?/D
} ]f0OmUHR5i
for (j = 1; j <= r - mid; j++) { 1 +[sM
temp[r - j + 1] = data[j + mid]; T7%!JBg@
} L$BV`JWPw
int a = temp[l]; "Kdn`zN{
int b = temp[r]; 9z..LD(
for (i = l, j = r, k = l; k <= r; k++) { ES?*w@x
if (a < b) { ?w+ V:D
data[k] = temp[i++]; _OC@J*4.
a = temp; BlQX$s]
} else { ^Kg n:l
data[k] = temp[j--]; fjOq@thD
b = temp[j]; Qz3Z_V4k9
} aL%E#
} |R1T;J<[
} i[@13kr
2j}DI"|h
/** +FAj30
* @param data [q_+s
* @param l UKQ"sC
* @param i 4(8trD6
*/ Px&_6}YWy
private void insertSort(int[] data, int start, int len) { f:-l}Zj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); VX&PkGi?o
} SI=u-'%
} NB4O,w
} kw@^4n+M
} r5Tdp)S
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堆排序： HA*L*:0
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package org.rut.util.algorithm.support; 6tndC o;`
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import org.rut.util.algorithm.SortUtil; H#DvCw
8'HS$J;C
/** tKeTHj;jO
* @author treeroot q;")
* @since 2006-2-2 uINdeq7|F
* @version 1.0 0'fswa)
*/ XS">`9o!
public class HeapSort implements SortUtil.Sort{ kJp~'\b
tw>2<zmSi%
/* (non-Javadoc) zD79M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Cf3!Ud
*/ qS2Nk.e]o
public void sort(int[] data) { Z sTtSM\Ac
MaxHeap h=new MaxHeap(); dw3Hk$"h
h.init(data); z8'1R6nq
for(int i=0;i h.remove(); M{Z ;7n'
System.arraycopy(h.queue,1,data,0,data.length); `}$o<CJ
} %KXiB6<4
{VL@U$'oI
private static class MaxHeap{ pX ^^0
o[T+/Ej&
void init(int[] data){ !6T"J!F#
this.queue=new int[data.length+1]; ~?AEtl#&"
for(int i=0;i queue[++size]=data; C=/B\G/.9
fixUp(size); {^ b2nOMv
} ^Aq0<
} G$+v |z
Zn'tNt/
private int size=0; uI)twry]@
RI0^#S_{
private int[] queue; /}(d'@8p
:Ko6.|
public int get() { ~vFa\7sf
return queue[1]; ^k;]"NR
} LmePJ
AO$AT_s
public void remove() { g4$(%]
SortUtil.swap(queue,1,size--); eZLEdTScM
fixDown(1); hlaN'j <C
} /.Ak'Vmi
file://fixdown %,kP_[!>Q
private void fixDown(int k) { ^ RA'E@"
int j; rNii,_
while ((j = k << 1) <= size) { FM >ae-L-
if (j < size %26amp;%26amp; queue[j] j++; [d6!
if (queue[k]>queue[j]) file://不用交换 b}3"v(
break; e "A"
SortUtil.swap(queue,j,k); yZ|"qP1
k = j; .h7s.p?
} g[3LPKQ
} s|]g@czan
private void fixUp(int k) { DAB9-[y+
while (k > 1) { [|DKBJ
int j = k >> 1; 8AuBs;i
if (queue[j]>queue[k]) #]kjyT0
break; ttzNv>L,
SortUtil.swap(queue,j,k); 6<._^hyq
k = j; "6$V1B0KW
} MC}t8L=
} @1JwjtNk
hj [77EEz
} - {QU>`2
[y[d7V9_o
} udZOg
;Y$>WKsV
SortUtil： &12KpEyf
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package org.rut.util.algorithm; b-&iJ &>'
;uUFgDi
import org.rut.util.algorithm.support.BubbleSort; :8A+2ra&
import org.rut.util.algorithm.support.HeapSort; Ey&H?OFiP
import org.rut.util.algorithm.support.ImprovedMergeSort; d;Vy59}eY
import org.rut.util.algorithm.support.ImprovedQuickSort; ~&i4FuK
import org.rut.util.algorithm.support.InsertSort; Nr~$i%[
import org.rut.util.algorithm.support.MergeSort; N{;!xIv
import org.rut.util.algorithm.support.QuickSort; ;sZG=y@
import org.rut.util.algorithm.support.SelectionSort; s[yWBew
import org.rut.util.algorithm.support.ShellSort; Cbw *?9d
&AQqI
/** Je1d|1!3
* @author treeroot 5Q?Jm~H9
* @since 2006-2-2 _FY&XL=
* @version 1.0 <'a~Y3B"o
*/ 0 &zp
public class SortUtil { ~t`^|cr|
public final static int INSERT = 1; XA>W>|
public final static int BUBBLE = 2; &S,D;uhF
public final static int SELECTION = 3; =ejj@c
public final static int SHELL = 4; 8M,*w6P
public final static int QUICK = 5; eqo0{e
public final static int IMPROVED_QUICK = 6; !eLj+0
public final static int MERGE = 7; ti\ ${C3
public final static int IMPROVED_MERGE = 8; I`kfe`_
public final static int HEAP = 9; 9DxHdpOk
w,LtQhQ
public static void sort(int[] data) { CLR1CGnn7
sort(data, IMPROVED_QUICK); O VV@
} m[9.'@ye
private static String[] name={ 06&J!,p :
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :C~Ar]
}; Ott6y
5)k8(kH
private static Sort[] impl=new Sort[]{ uN|A}/hr]
new InsertSort(), pP. _%5
new BubbleSort(), d7OygDb<
new SelectionSort(), MMM tB6
new ShellSort(), 7L{1S v
new QuickSort(), `ONjEl
new ImprovedQuickSort(), b_0THy.Z
new MergeSort(), Xz+%Ym
new ImprovedMergeSort(), *o6}>;
new HeapSort() bx0.(Nv/X
}; u6qK4*eAD
:t}\%%EbmE
public static String toString(int algorithm){ b\k]Jx
return name[algorithm-1]; )pB#7aEw
} P6:9o}K6
YG "Ta|@5
public static void sort(int[] data, int algorithm) { L:R4&|E/t
impl[algorithm-1].sort(data); {f/qI`
} f-ltV<C_
^|]&"OaB Z
public static interface Sort { BQ@7^E[
public void sort(int[] data); XH%L]
} \iuR+I
lSj gN~:z
public static void swap(int[] data, int i, int j) { p8rh`7
int temp = data; l& :EKh
data = data[j]; tcD7OC:"6
data[j] = temp; ;FPx
} Pf*6/7S:
} 2;}leZ@U