[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; &VU^d3gv~
} 9BOn8p;yz
int i1=l; }@$CS5w
int i2=mid+1; >nehyo:#
for(int cur=l;cur<=r;cur++){ D{8B;+
if(i1==mid+1) ~,F]~|U7l
data[cur]=temp[i2++]; #bGYHN
else if(i2>r) gYho$E
data[cur]=temp[i1++]; 2PPb
else if(temp[i1] data[cur]=temp[i1++]; C4X3;l Z%S
else ;X;x.pi
data[cur]=temp[i2++]; Z1W%fT
} :1t&>x=T
} p{qA%D
8M3DG=D
} yp]vDm
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改进后的归并排序: NV{= tAR
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package org.rut.util.algorithm.support; Z<C39s
jl;N Fk%
import org.rut.util.algorithm.SortUtil; l8Yr]oNkz
FLsJ<C~/~
/** -=:tlH n
* @author treeroot =dKk #*
* @since 2006-2-2 Y/mfBkh
* @version 1.0 k<fR)o
*/ ,,EG"Um6
public class ImprovedMergeSort implements SortUtil.Sort { U;ujN8
!f!YMpN
private static final int THRESHOLD = 10; "_dJ4<8
XkW@"pf&Fh
/* @/01MBs;
* (non-Javadoc) b<r*EY
* [r]<~$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pR*3Q@Ng
*/ C2iOF/4
public void sort(int[] data) { m=pH G
int[] temp=new int[data.length]; RAEN &M
mergeSort(data,temp,0,data.length-1); &QHmo*
} {9@E[bWp#
.aK=z)
private void mergeSort(int[] data, int[] temp, int l, int r) { [;toumv
int i, j, k; 2l+'p[b0>
int mid = (l + r) / 2; 02^\np
if (l == r) Zia6m[^Q
return; 1-4[w *u>
if ((mid - l) >= THRESHOLD) _{B2z[G}
mergeSort(data, temp, l, mid); v+C D{Tc
else NXOvC!<
insertSort(data, l, mid - l + 1); e \kR/<L
if ((r - mid) > THRESHOLD) 2gvS`+<TP
mergeSort(data, temp, mid + 1, r); Mns=X)/hc
else E[CvxVCx
insertSort(data, mid + 1, r - mid); KJ-Q$ M
'r^'wv]
for (i = l; i <= mid; i++) { %74f6\
temp = data; N'5DB[:c:
} RzB64
for (j = 1; j <= r - mid; j++) { *:l$ud
temp[r - j + 1] = data[j + mid]; #s}tH$MT#
} =/xXB
int a = temp[l]; }ZwnG=7T?
int b = temp[r]; &t@ $]m(
for (i = l, j = r, k = l; k <= r; k++) { eEmLl(Lb
if (a < b) { jNIz:_c-~
data[k] = temp[i++]; !P6y_Frpe
a = temp; ri9n.-xs
} else { </fTn_{2s8
data[k] = temp[j--]; t!ZFpMv]n
b = temp[j]; q<fj1t1w
} p7*7V.>X
} =Y3d~~
} ,*p(q/kJh~
w'5W L
/** ?GZ?HK|
* @param data b DF_
* @param l YWq{?'AaR
* @param i @zix%x
*/ fG7-07
private void insertSort(int[] data, int start, int len) { PO2]x:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); r7)iNTQ1
} E?mW4?
} .e:+Ek+
} NXE1v~9V
} 8,m:
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堆排序： F|WH=s3
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package org.rut.util.algorithm.support; C|ou7g4'p
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import org.rut.util.algorithm.SortUtil; ~1{~iB2G
~#zb
/** 0`WZ
* @author treeroot Y7yzM1?t
* @since 2006-2-2 J=DD/Gp
* @version 1.0 ^A;ec h7I
*/ y|.dM.9V
public class HeapSort implements SortUtil.Sort{ A<g5:\3
rHtX4;f+><
/* (non-Javadoc) +d6Jrd*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sy9YdPPE
*/ Y9(BxDP_+Y
public void sort(int[] data) { Yr:$)ap
MaxHeap h=new MaxHeap(); *-_joAWTG
h.init(data); IG@@CH
for(int i=0;i h.remove(); (b1rd
System.arraycopy(h.queue,1,data,0,data.length); X`daaG_l
} "w{,ndZ
`udZ =S"/L
private static class MaxHeap{ 3dI(gm6
PuU<
void init(int[] data){ Z~7}
this.queue=new int[data.length+1]; xWty2/!h
for(int i=0;i queue[++size]=data; xm<sH!,j
fixUp(size); uFi[50
} y\[GS2nTX
} a% 82I::t
&sPu3.p
private int size=0; Hkj| e6
o Bp.|8-
private int[] queue; V P4ToYc
"[]J[!}x
public int get() { L2y{\<JC"
return queue[1]; |.U- yyz
} ,%]s:vk[u
0EP8MRSR
public void remove() { kI$p~
SortUtil.swap(queue,1,size--); M7IQJFra
fixDown(1); DWJkN4}o
} /K#J63 ,
file://fixdown :!gzx n
private void fixDown(int k) { t~]oJ5%
int j; %^8>=
while ((j = k << 1) <= size) { ~;Xkt G:
if (j < size %26amp;%26amp; queue[j] j++; I*i$!$Bx2
if (queue[k]>queue[j]) file://不用交换 "LH*T
break; Fqp~1>wi
SortUtil.swap(queue,j,k); \A3yM{G~+
k = j; 8uhB&qxB
} WN?meZ/N/
} i(>v~T,(
private void fixUp(int k) { Hz<)a(r!J
while (k > 1) { _N`pwxpsb
int j = k >> 1; =E%<"FB
if (queue[j]>queue[k]) =R\-mov$
break; q\5C-f
SortUtil.swap(queue,j,k); qxW2q8QHo
k = j; bYH! P/
} [Z?vC
} ./;*LD
-Qco4>Z8
} |k9A*7I
s97L/iH
} _`Sz}Yk
#3u471bp
SortUtil： -x1O|q69
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package org.rut.util.algorithm; 6ypqnOTr
C(*)7| m
import org.rut.util.algorithm.support.BubbleSort; A,s .<TG
import org.rut.util.algorithm.support.HeapSort; @$'1
import org.rut.util.algorithm.support.ImprovedMergeSort; }tT*Ch?u
import org.rut.util.algorithm.support.ImprovedQuickSort; 9^c"HyR
import org.rut.util.algorithm.support.InsertSort; {VE$i2nC8
import org.rut.util.algorithm.support.MergeSort; P X<,/6gz
import org.rut.util.algorithm.support.QuickSort; Mky8qVQ2
import org.rut.util.algorithm.support.SelectionSort; =1vVITwl
import org.rut.util.algorithm.support.ShellSort; [f'DxZF-
CSooJ1Ep~'
/** rJm%qSZz
* @author treeroot }t #Hq
* @since 2006-2-2 f?C !Br}
* @version 1.0 SB[,}h<u1
*/ KhV; />(
public class SortUtil { (Dl68]FX
public final static int INSERT = 1; y0'"
public final static int BUBBLE = 2; w8g36v*+(u
public final static int SELECTION = 3; 0-+`{j
public final static int SHELL = 4; Vkb&' rXw+
public final static int QUICK = 5; ^i^S1h"
public final static int IMPROVED_QUICK = 6; j{'@g[HW
public final static int MERGE = 7; d|sI>6jD
public final static int IMPROVED_MERGE = 8; fJC,ubP[5
public final static int HEAP = 9; 3,B[%!3d
I1H:h
public static void sort(int[] data) { <cz~q=%v2&
sort(data, IMPROVED_QUICK); wB( igPi
} l9.wMs*`X
private static String[] name={ ),6Z1 K1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" c$'UfW
}; g%<7Px[W
{:enoV"
private static Sort[] impl=new Sort[]{ 6A/|XwfE/v
new InsertSort(), K~WwV8c9;
new BubbleSort(), Ja#idF[V
new SelectionSort(), Z [5HI;
new ShellSort(), qQ6NxhQo
new QuickSort(), 9aC>gye!
new ImprovedQuickSort(), HF\L`dJX?
new MergeSort(), tIC_/ 6
new ImprovedMergeSort(), q& Vt*
new HeapSort() Yazpfw 7'd
}; 6C/D&+4
Zy7@"C
public static String toString(int algorithm){ W:>RstbnMG
return name[algorithm-1]; %]Nz54!
} rd1&?X
o#wF/ I
public static void sort(int[] data, int algorithm) { aTs_5q
impl[algorithm-1].sort(data); Phgn|
} ]@ [=FK^
}wkBa]
public static interface Sort { tY:-13F
public void sort(int[] data); 9AL\6@<a*
} )-a_,3x%j
C>;yW7*g"
public static void swap(int[] data, int i, int j) { r%'2a+}D
int temp = data; }RUC#aW1
data = data[j]; 6]gs{zG
data[j] = temp; `u-VGd\
} J= |[G'
} m9xu$z|e