[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; zXxT%ZcCj
} .oUTqki
int i1=l; |:<f-j7t~
int i2=mid+1; !|S43i&p
for(int cur=l;cur<=r;cur++){ o/Q;f@
if(i1==mid+1) Ab"@714@
data[cur]=temp[i2++]; p\ZNy\N^
else if(i2>r) hL;(C)(
data[cur]=temp[i1++]; A_5P/ARmI
else if(temp[i1] data[cur]=temp[i1++]; 6U,O*WJ%e
else I\[_9
data[cur]=temp[i2++]; u=7J/!H7^
} ApV~(k)W
} 4X |(5q?
T7u%^xm
} }$Tl ?BRpU
`Kr,>sEAM
改进后的归并排序: EbE-}>7OO
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package org.rut.util.algorithm.support; c>Xs&_
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import org.rut.util.algorithm.SortUtil; !F1N~6f
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/** b@f$nS B
* @author treeroot [^e%@TV>d
* @since 2006-2-2 u5: q$P
* @version 1.0 j=aI9p
*/ JYd 'Jp8bP
public class ImprovedMergeSort implements SortUtil.Sort { VAf1" )pC
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private static final int THRESHOLD = 10; `a/%W4
lXiKY@R#
/* w6GyBo{2O_
* (non-Javadoc) ua]o6GlO
* v+`N*\J_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TQ*1L:X7M&
*/ Oz`BEyb]{
public void sort(int[] data) { &c:Ad% z
int[] temp=new int[data.length]; 5^lxj~ F
mergeSort(data,temp,0,data.length-1); orfO^;qTY
} Hx*;jpy(2
G) 7;;
private void mergeSort(int[] data, int[] temp, int l, int r) { ahOMCZF|
int i, j, k; \LppYXz
int mid = (l + r) / 2; <|+Ex
if (l == r) TDNQu_E
return; |J}Mgb-4
if ((mid - l) >= THRESHOLD) ]0)|7TV*
mergeSort(data, temp, l, mid); G<f@#[$'
else `[)YEgs
insertSort(data, l, mid - l + 1); .#Z%1U%P.
if ((r - mid) > THRESHOLD) !~&R"2/
mergeSort(data, temp, mid + 1, r); TXk?#G\o
else i9A+gtd
insertSort(data, mid + 1, r - mid); $lIz{ySJv
tj4VWJK
for (i = l; i <= mid; i++) { V=V:SlS9|
temp = data; ayD}r#7
} `gb5"`EZ
for (j = 1; j <= r - mid; j++) { k"]dK,,
temp[r - j + 1] = data[j + mid]; \\7ZWp\fN
} vIwCJN1C
int a = temp[l]; ?yR&/a
int b = temp[r]; b7tOo7aH)
for (i = l, j = r, k = l; k <= r; k++) { :Q_<Z@2Y{
if (a < b) { QxOjOKAG
data[k] = temp[i++]; T{Uc:Z
a = temp; B'EKM)dA
} else { rZ^v?4Z\
data[k] = temp[j--]; aKuSd3E@#
b = temp[j]; 9Z'8!$LYg
} aZ'Lx:)R
} @u%_1
} Kt|1&Gk
+H#U~p$
/** ux3<l+jv^
* @param data #x3ujJ
* @param l 3*)ig@e6
* @param i 3?Pn6J{O
*/ Ve!fU
private void insertSort(int[] data, int start, int len) { @kU@N?5e
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pV,P|>YTf
} g[7#w,o
} xD[Gq%
} 5 Ho^N1q
} z;wELz1L{
wz.6du6-
堆排序： '@CR\5 @
Z(_ZAB%+D
package org.rut.util.algorithm.support; 9*=W-v
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import org.rut.util.algorithm.SortUtil; Eb>78k(3I)
m[@Vf9
/** fpN- o
* @author treeroot aKJQm'9Ks
* @since 2006-2-2 !o+_T?
* @version 1.0 V-r3-b
*/ $aPfGZ<i
public class HeapSort implements SortUtil.Sort{ XNb ZNaAd
AT)a :i
/* (non-Javadoc) SdwS= (e6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j>/ ,$H
*/ 0{PzUIM,W
public void sort(int[] data) { ,SiY;(b=\
MaxHeap h=new MaxHeap(); -"[<ek
h.init(data); dG71*)<)t
for(int i=0;i h.remove(); !\;FNu8_.
System.arraycopy(h.queue,1,data,0,data.length); \7 NpT}dj
} 13&0rLS
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private static class MaxHeap{ T,OwM\`.X{
Z@%HvB7
void init(int[] data){ OOz[-j>'Y+
this.queue=new int[data.length+1]; 0W()lQ
for(int i=0;i queue[++size]=data; V@QK
fixUp(size); d4 (/m_HMu
} _:B1_rz7,
} !'*csg
Q9&kJ%Mo
private int size=0; @hImk`&[N
FsGlJ
private int[] queue; I;?X f
+/;*|
public int get() { *79m^
return queue[1]; |fY/i] Ax
} <JwX_\?ln
Ep4Hqx $
public void remove() { K!mOr
SortUtil.swap(queue,1,size--); <x),,a=X
fixDown(1); 02k4N%
} 5I@w~z
file://fixdown CCGV~e+
private void fixDown(int k) { ?<yM7O,4
int j; sW^a`VM
while ((j = k << 1) <= size) { ec|/ /
if (j < size %26amp;%26amp; queue[j] j++; Px>va01n
if (queue[k]>queue[j]) file://不用交换 `:G%
break; 5Y3i|cj
SortUtil.swap(queue,j,k); 9ElCg"
k = j; V8~jf-\$b
} nB ".'=
} 2spg?]
private void fixUp(int k) { CC3v%^81l^
while (k > 1) { fXQiNm[P
int j = k >> 1; zK+52jhi
if (queue[j]>queue[k]) NS,5/t
break; +/+P\O
SortUtil.swap(queue,j,k); 'iLH `WE
k = j; &wetzC)
} t%r :4,
} B )JM%r
jRpdft
} Us~ X9n_F
bxXiQa
} efuK
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SortUtil： WnAd5#G
"MiD8wX-
package org.rut.util.algorithm; h.whjiCFa
G;oFTP>o
import org.rut.util.algorithm.support.BubbleSort; Cv=GZGn-
import org.rut.util.algorithm.support.HeapSort; 7=*VpX1
import org.rut.util.algorithm.support.ImprovedMergeSort; ELh3^
import org.rut.util.algorithm.support.ImprovedQuickSort; p11G#.0
import org.rut.util.algorithm.support.InsertSort; aP>37s
import org.rut.util.algorithm.support.MergeSort; ;</Twm;:
import org.rut.util.algorithm.support.QuickSort; 5GAy "Xd
import org.rut.util.algorithm.support.SelectionSort; IdM*5Y>f
import org.rut.util.algorithm.support.ShellSort; ;' e@t8i6
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/** `HX3|w6W;
* @author treeroot I&1!v8
* @since 2006-2-2 chAan~r[*
* @version 1.0 QlW=_Ymv{
*/ M>_= "atI
public class SortUtil { uiBTnG"
public final static int INSERT = 1; 04y!\
public final static int BUBBLE = 2; 4^!4eyQ^
public final static int SELECTION = 3; i|\{\d
public final static int SHELL = 4; 3^G96]E
public final static int QUICK = 5; J^I7BsZ
public final static int IMPROVED_QUICK = 6; Wtv#h~jy9
public final static int MERGE = 7; v29G:YQe
public final static int IMPROVED_MERGE = 8; @PcCiGZ
public final static int HEAP = 9; B[xR-6phW
_JOP[KHb
public static void sort(int[] data) { a%~yol0wO7
sort(data, IMPROVED_QUICK); TvrwVL)
} M<qudi
private static String[] name={ #Mi|IwL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DcFCKji
}; bx(w:]2
\mXqak,y
private static Sort[] impl=new Sort[]{ KP~-$NR
new InsertSort(), x9}++r
new BubbleSort(), :z~!p~
new SelectionSort(), XN;/nU
new ShellSort(), J#7(]!;F
new QuickSort(), ,ZK]i CGk
new ImprovedQuickSort(), &LU'.jY
new MergeSort(), 5a$$95oL
new ImprovedMergeSort(), cTj~lO6
new HeapSort() 1!s28C5u
}; _ +KmNfR
UpeQOC
public static String toString(int algorithm){ [~?M/QI9
return name[algorithm-1]; #,P(isEZ"
} =QiT)9q)
MYTS3(
public static void sort(int[] data, int algorithm) { kukaim>K
impl[algorithm-1].sort(data); @9_)On9hZ
} 2k3 z'RLG
lS3 _Ild
public static interface Sort { p#M!S2&z
public void sort(int[] data); K.h]JD]o
} v@,XinB[
J3\)Jy
public static void swap(int[] data, int i, int j) { gX"T*d>y
int temp = data; T{~MiC6A
data = data[j]; oUS,+e
data[j] = temp; AJWLEc4XK
} &z0iLa4q)
} ]n1D1