[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; W|)GV0YM
} oN *SRaAp
int i1=l; cC^W2\
int i2=mid+1; 9@:BK;Fi
for(int cur=l;cur<=r;cur++){ v6wRME;JA
if(i1==mid+1) JB&G~7Q85
data[cur]=temp[i2++]; 3p:=xL
else if(i2>r) Z5((1J9
data[cur]=temp[i1++]; ?qju DD
else if(temp[i1] data[cur]=temp[i1++]; 2dHM
else u?Fnlne4@
data[cur]=temp[i2++]; Oo FgQEr@
} >vUB%OLyP
} "6?lQw e
iaY5JEV:CA
} aXMv(e+
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改进后的归并排序: ZU=,f'bU
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package org.rut.util.algorithm.support; o^HNF+sm
Z}|TW~J=
import org.rut.util.algorithm.SortUtil; b<[jaI0
xC<=~(
/** qs=Gj?GwGQ
* @author treeroot 4HM;K_G%{
* @since 2006-2-2 +T9Q_e*
* @version 1.0 Fj S%n$
*/ ,mBZ`X@N
public class ImprovedMergeSort implements SortUtil.Sort { =v.{JV#
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private static final int THRESHOLD = 10; js~tKUvg
F"!agc2!
/* >9ob*6q,
* (non-Javadoc) 1Fv8T'
* TYYp"wx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2b5#PcKa
*/ +a|"{
public void sort(int[] data) { zJ5hvDmC
int[] temp=new int[data.length]; X4a^mw\"
mergeSort(data,temp,0,data.length-1); }i(qt&U;
} !{;[xXK4M
zG_p"Z7,
private void mergeSort(int[] data, int[] temp, int l, int r) { '!p=aF9L
int i, j, k; grr'd+_e
int mid = (l + r) / 2; aSel* L
if (l == r) Re>AsnA[
return; l09Fn>wa
if ((mid - l) >= THRESHOLD) "u_i[[y
mergeSort(data, temp, l, mid); jAXR`D
else cv2]*
insertSort(data, l, mid - l + 1); 2gt+l?O<PS
if ((r - mid) > THRESHOLD) ^EF'TO$
mergeSort(data, temp, mid + 1, r); yf!,4SUkU
else :Zza)>l
insertSort(data, mid + 1, r - mid); UVrQV$g!
xq2V0Jp1u
for (i = l; i <= mid; i++) { Pg`JQC|
temp = data; ndw7v
} ;+sl7qlA4
for (j = 1; j <= r - mid; j++) { xOythvO
temp[r - j + 1] = data[j + mid]; t-WjL@$F/
} -OrR $w|e
int a = temp[l]; WSRy%#
int b = temp[r]; n0Go p^3
for (i = l, j = r, k = l; k <= r; k++) { 8!&nKy<Y
if (a < b) { uVGa(4u}
data[k] = temp[i++]; [& ^RP,N~
a = temp; /be=u@KV
} else { n#4Gv|{XMD
data[k] = temp[j--]; I.1D*!tz
b = temp[j]; w]nX?S8
} Z&Ue|Z4Qt
} +c--&tBo
} iwU[6A
=Q-k'=6\
/** Di>rO038
* @param data 2:Q(Gl`<l
* @param l ;\qXbL7
* @param i P>(P2~$Y"
*/ *:g_'K"+
private void insertSort(int[] data, int start, int len) { gyev5txn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Fi4UaJ3K
} rFey4zzz
} pLnB)z?
} h./P\eDc
} yoQ\lk
C`QzT{6!
堆排序： iCP~O
Pz%~ST
package org.rut.util.algorithm.support; a[sKE?
9cG<hX9`F
import org.rut.util.algorithm.SortUtil; ^]>aHz9
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/** yS!(Ap
* @author treeroot 8O7Yv<
* @since 2006-2-2 =xL)$DTg)
* @version 1.0 L[y Pjw:0
*/ )#C mQXgG
public class HeapSort implements SortUtil.Sort{ RF?DtNuq
L&kr{7q
/* (non-Javadoc) X`:'i?(yj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <^8*<;PaG
*/ 4r&f%caU
public void sort(int[] data) { oh~:,
MaxHeap h=new MaxHeap(); M&KyA
h.init(data); +Rwx%=
for(int i=0;i h.remove(); wfR&li{
System.arraycopy(h.queue,1,data,0,data.length); [|RjHGf
} )K;]y-Us[
kccWoU,
private static class MaxHeap{ Y/fJQ6DY
HbM0TXo
void init(int[] data){ l+'F_a
this.queue=new int[data.length+1]; xq[Yg15d%
for(int i=0;i queue[++size]=data; mrM4RoO
fixUp(size); Qhn;`9+L
} fvqd'2 t
} T2=HG Z
P`(Mk6gE
private int size=0; lr~0pL
!l 6dg&
private int[] queue; N|K4{Frm
uwmQ?LS]V
public int get() { 8Lz]Z h=ZU
return queue[1]; B{MaMf)
} V'pqxjfd
</[: 9Cl
public void remove() { 8 lT{1ro
SortUtil.swap(queue,1,size--); poT&-Ic[
fixDown(1); (=u'sn:s
} 94/BG0
file://fixdown )8,|-o=
private void fixDown(int k) { 7K;!iX<d
int j; @?kJ).
while ((j = k << 1) <= size) { #_JYh?
if (j < size %26amp;%26amp; queue[j] j++; )nfEQ)L;h}
if (queue[k]>queue[j]) file://不用交换 $IX\O
break; O )d[8jw"
SortUtil.swap(queue,j,k); F #`=oM$5
k = j; fjG&`m#"
} wTc)S6%7
} j:,9%tg
private void fixUp(int k) { HrM$NRhu
while (k > 1) { rD &D)w
int j = k >> 1; O_~7Glu
if (queue[j]>queue[k]) Yh<WA>=
break; -_N)E ))G
SortUtil.swap(queue,j,k); ;9a 6pz<
k = j; ,$lemH1d
} i=S~(gp
} vB0RKk}d5
.; Q:p*
} `3cCH
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} r! %;R?c
aYn^)6^
SortUtil： K> g[k_
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package org.rut.util.algorithm; GVGlVAo|@
V3Z]DA
import org.rut.util.algorithm.support.BubbleSort; g}LAks
import org.rut.util.algorithm.support.HeapSort; 0#_'o ,
import org.rut.util.algorithm.support.ImprovedMergeSort; i3$$,W!
import org.rut.util.algorithm.support.ImprovedQuickSort; fyknP)21I
import org.rut.util.algorithm.support.InsertSort; Lgk
import org.rut.util.algorithm.support.MergeSort; dT|vYK}\
import org.rut.util.algorithm.support.QuickSort; XvTCK>1
import org.rut.util.algorithm.support.SelectionSort; hX:"QXx
import org.rut.util.algorithm.support.ShellSort; \ 0W!4D
zUJZ`seF
/** <y.]ImO
* @author treeroot p>w]rE:}
* @since 2006-2-2 b97w^ah4gJ
* @version 1.0 ULJmSe
*/ VqSc;w
public class SortUtil { AIYmS#V1W2
public final static int INSERT = 1; $sHP\{
public final static int BUBBLE = 2; )!:sFa 1
public final static int SELECTION = 3; \3f&7wU
public final static int SHELL = 4; ]`g@UtD9`
public final static int QUICK = 5; &ANP`=
public final static int IMPROVED_QUICK = 6; )kXhtjOl|
public final static int MERGE = 7; dt@P>rel
public final static int IMPROVED_MERGE = 8; 2Os1C}m
public final static int HEAP = 9; Qn@Pd*DR
'a6<ixgo0
public static void sort(int[] data) { O^Q7b7}y
sort(data, IMPROVED_QUICK); nI.x
} CNZz]H
private static String[] name={ Q4*?1`IsR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ElhRF{R
}; !>,m&O-x
"hxN!,DEZ
private static Sort[] impl=new Sort[]{ HBS\<}
new InsertSort(), 4`m~FNVS
new BubbleSort(), CC=d I
new SelectionSort(), Mn1Pt|_@!
new ShellSort(), aT!'}GjL
new QuickSort(), O/s$SX%g
new ImprovedQuickSort(), d\{>TdyF
new MergeSort(), Hb} X-6N
new ImprovedMergeSort(), H %JaZ?(
new HeapSort() K.<.cJE
}; i9<pqQ
Q_-_^J
public static String toString(int algorithm){ JxE53ev
return name[algorithm-1]; y$FW$Ka
} ajR%c2G;
IJYL s
public static void sort(int[] data, int algorithm) { !G^L/?z3
impl[algorithm-1].sort(data); c#-U%qZ
} wI]"U2L5
tz4 ]qOH8
public static interface Sort { ^z1&8k"[^
public void sort(int[] data); kft#R#m
} McH>"`
9EDfd NN
public static void swap(int[] data, int i, int j) { L37Y+C//
int temp = data; {vUN+We
data = data[j]; &,A64y
data[j] = temp; ?Nf>]|K:Q
} 1tTgP+
} (~CLn;'