[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; X0a)6HZ{
} 8SH&b8k<<
int i1=l; B?A]0S
int i2=mid+1; )b AOA
for(int cur=l;cur<=r;cur++){ xZbiEDU
if(i1==mid+1) QX`Qnk|Y
data[cur]=temp[i2++]; hb@,fgo!Q
else if(i2>r) q|N,?f9
data[cur]=temp[i1++]; ~4-:;8a
else if(temp[i1] data[cur]=temp[i1++]; C8dC_9
else g"b{M
data[cur]=temp[i2++]; cX~J6vNy5
} a6Zg~>vX
} j_]#Ew\q
r xlKoa
} GnTCq_\
Owd{;
改进后的归并排序: :c03"jvYE
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package org.rut.util.algorithm.support; lqaOLZH
,u.G6"<
import org.rut.util.algorithm.SortUtil; vGX L'k
M/?*?B
/** vca]yK<u
* @author treeroot b{ M'aV
* @since 2006-2-2 $W_sIS0\z
* @version 1.0 OoIs'S-Z#
*/ _z6_mmMp
public class ImprovedMergeSort implements SortUtil.Sort { (AIgW
c+a"sx\
private static final int THRESHOLD = 10; yyZs[5Q
QVT|6znw
/* #E`wqI\'
* (non-Javadoc) qnO>F^itF
* r2b_$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o57r ,`N
*/ pDYcsC{p
public void sort(int[] data) { bX*>Zm
int[] temp=new int[data.length]; Kg8n3pLAX
mergeSort(data,temp,0,data.length-1); d@b" ~r}
} A!GQ4.~%
Sm5T/&z
private void mergeSort(int[] data, int[] temp, int l, int r) { BQo$c~
int i, j, k; b+/z,c6w
int mid = (l + r) / 2; AQ)DiH
if (l == r) 1\u{1 V
return; A WS[e$Mt2
if ((mid - l) >= THRESHOLD) nNc>nB1
mergeSort(data, temp, l, mid); V'iT>
else Y%zYO
insertSort(data, l, mid - l + 1); nyl[d|pVa
if ((r - mid) > THRESHOLD) H{1'OC
mergeSort(data, temp, mid + 1, r); {e]ktj#+{
else @sPuc.
insertSort(data, mid + 1, r - mid); %M7EOa
59k[A~)~
for (i = l; i <= mid; i++) { XbaUmCuh
temp = data; cqd}.D
} $:}sm0;
for (j = 1; j <= r - mid; j++) { z%lLbKSe
temp[r - j + 1] = data[j + mid]; i8nzPKF2$3
} BbCaIt
int a = temp[l]; +{b3A@f|F
int b = temp[r]; ]yAOKmS
for (i = l, j = r, k = l; k <= r; k++) { ,v@C=4'm
if (a < b) { >{1 i8 b@
data[k] = temp[i++]; SoJ=[5W
a = temp; (8Inf_59
} else { EK8rV
data[k] = temp[j--]; -]~KQvIH!
b = temp[j]; *S= c0
} -\I".8"YE
} 2~B9 (|
} VKb=)v[K
!kQJ6U
/** #E;a;$p
* @param data :k/Z|
* @param l s2kom)
* @param i :ceT8-PBRx
*/ Va-.
private void insertSort(int[] data, int start, int len) { 1e)5D& njS
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k:i}xKu
} E``\Jre@
} wf""=;
} \$Q?
} qBDhCE
.~Gt=F+`s
堆排序： Vjqs\
|T+YC[T#v
package org.rut.util.algorithm.support; CFW#+U#U
~{00moN"m
import org.rut.util.algorithm.SortUtil; d`sIgll&n
kE[Hq-J=N
/** AAc*\K
* @author treeroot XCyAt;neon
* @since 2006-2-2 o?`^ UG-
* @version 1.0 2qDyb]9
*/ bH`r=@.:cu
public class HeapSort implements SortUtil.Sort{ Q&`if O
@g%^H)T
/* (non-Javadoc) u;Rm/.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZOzwO6(_
*/ @!KG;d:l
public void sort(int[] data) { UZ-[vD1n
MaxHeap h=new MaxHeap(); neBcS[
h.init(data); qBF}-N_
for(int i=0;i h.remove(); hOM#j
System.arraycopy(h.queue,1,data,0,data.length); VK[`e[.C
} ,cFBLj(@
YF$nL(
private static class MaxHeap{ h {M=V
W8N__
void init(int[] data){ :Oh*Q(>
this.queue=new int[data.length+1]; (X/dP ~
for(int i=0;i queue[++size]=data; 2*pNIc
fixUp(size); *}RV)0mif
} COFCa&m9c
} k`=&m"&#
&'"dYZj{
private int size=0; $TY1'#1U;
uZXG"
private int[] queue; \}:;kO4f
6QX2&[qWS
public int get() { z|v/hUrD
return queue[1]; 5-! Zm]
} "VgPaz#
1qE*M7_:E>
public void remove() { \:Z8"~G
SortUtil.swap(queue,1,size--); owe6ge7m
fixDown(1); Q60'5Wt
} 60X))MyN
file://fixdown RN ~pC
private void fixDown(int k) { ppR;v
int j; L8~zQV$h
while ((j = k << 1) <= size) { b@ OF
if (j < size %26amp;%26amp; queue[j] j++; PwS7!dzH-
if (queue[k]>queue[j]) file://不用交换 fp2uk3Bm[
break; WVdF/H
SortUtil.swap(queue,j,k); @XN*H- |
k = j; (dHil#l
} 4Ixu%
} h:Hpz
private void fixUp(int k) { 4=C7V,a
while (k > 1) { !~-@p?kW/
int j = k >> 1; 4%>2>5
if (queue[j]>queue[k]) v O@7o
break; CH] +S>$
SortUtil.swap(queue,j,k); qrkJ:
k = j; ~mk>9Gp
} ,Wlw#1fP
} +qee8QH
5K {{o''
} {(_>A\zi
5uO.@0
} *DuP~8
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SortUtil： HC>MCwx=r
P$Fq62;}r4
package org.rut.util.algorithm; DlxL:
Ybp';8V
import org.rut.util.algorithm.support.BubbleSort; pe>[Ts`2F
import org.rut.util.algorithm.support.HeapSort; XG8UdR|
import org.rut.util.algorithm.support.ImprovedMergeSort; ;3 /*Z5p
import org.rut.util.algorithm.support.ImprovedQuickSort; w3K>IDWI7
import org.rut.util.algorithm.support.InsertSort; +OfHa\Nz
import org.rut.util.algorithm.support.MergeSort; #OVS]Asn}
import org.rut.util.algorithm.support.QuickSort; x]pZcx9
import org.rut.util.algorithm.support.SelectionSort; lJ(];/%
import org.rut.util.algorithm.support.ShellSort; P|rreSv*
*B%ulsm
/** \PM5B"MDZ
* @author treeroot p&W{g$D>
* @since 2006-2-2 nrJW.F]S8[
* @version 1.0 EzGO/uZ]
*/ *4O9W8Qz
public class SortUtil { yBnUz"
public final static int INSERT = 1; 4N_iHe5U
public final static int BUBBLE = 2; g$^I/OK?
public final static int SELECTION = 3; U^d!*9R
public final static int SHELL = 4; =m/BH^|&W
public final static int QUICK = 5; [f#7~
public final static int IMPROVED_QUICK = 6; (x1 #_~
public final static int MERGE = 7; hs?cV)hDS
public final static int IMPROVED_MERGE = 8; ITf4PxF
public final static int HEAP = 9; Tw@:sWC
Km!~zG7<
public static void sort(int[] data) { `+5,=S
sort(data, IMPROVED_QUICK); rk< 3QXv
} yN9setw*,M
private static String[] name={ (T1d!v"~"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" aSQvtv)91
}; N5Ih+8zT
FSA"U9 w<
private static Sort[] impl=new Sort[]{ Bw4 _hlm
new InsertSort(), K%(DRkj)
new BubbleSort(), CNrK]+>
new SelectionSort(), *7^w}v+.
new ShellSort(), cnR18NK
new QuickSort(), G&dz<f
new ImprovedQuickSort(), *L=F2wW
new MergeSort(), xv~EwT)
new ImprovedMergeSort(), =O'>H](Q
new HeapSort() DRmN+2I
}; `Uy4>?
%-#rzeaW
public static String toString(int algorithm){ Or"+d 5
return name[algorithm-1]; Nj$h/P
} @{o3NR_
X$9 "dL
public static void sort(int[] data, int algorithm) { #uCE0}N@
impl[algorithm-1].sort(data); NG\^>.8
} .;jp2^
7N}==T89[
public static interface Sort { qZ rv2dT
public void sort(int[] data); .Uh|V-
} /rZ`e'}
mH5[(?
public static void swap(int[] data, int i, int j) { 95b65f
int temp = data; SZL('x,"^
data = data[j]; ~v^I*/uY
data[j] = temp; BM_Rlcx~
} wSIfqf+y
} >SaT?k1E