[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; Wds>'zzS
} c 1F^Gj!8
int i1=l; K& ^qn&
int i2=mid+1; 'M"z3j]m-,
for(int cur=l;cur<=r;cur++){ @r*GGI!
if(i1==mid+1) KUZi3\p9W>
data[cur]=temp[i2++]; wCLniCt
else if(i2>r) )Ac,F6w
data[cur]=temp[i1++]; H;nzo3x
else if(temp[i1] data[cur]=temp[i1++]; Zwc&4:5%
else `Uz.9_6
data[cur]=temp[i2++]; ~3:hed7:
} d5gwc5X
} NzQvciJ@"
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} EZB0qZIp
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改进后的归并排序: Opu*i
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package org.rut.util.algorithm.support; *P*~CHx>
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import org.rut.util.algorithm.SortUtil; Pt5wm\
x/<]/D
/** }5vKQf
* @author treeroot 4%r?(C0x
* @since 2006-2-2 vm+3!s:u
* @version 1.0 C<^i`[&P$
*/ mnM]@8^G
public class ImprovedMergeSort implements SortUtil.Sort { PM[W7gT
j? BL8E'
private static final int THRESHOLD = 10; R|qrK
[m:cO6DM,
/* g.9C>>tj
* (non-Javadoc) _$>);qIP4
* u/j\pDl.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Hu<]*(lK%
*/ I(~([F2
public void sort(int[] data) { PxrT@.T$
int[] temp=new int[data.length]; .Bl:hk\
mergeSort(data,temp,0,data.length-1); *x2!N$b
} EX{%CPp7}
ck]I?
private void mergeSort(int[] data, int[] temp, int l, int r) { aYa`ex
int i, j, k; -nNKUt.I
int mid = (l + r) / 2; F!#)l*OX;
if (l == r) im&N&A
return; Zt9G[[]
if ((mid - l) >= THRESHOLD) R5=J:o
mergeSort(data, temp, l, mid); yP$esDP
else (9%?ik
insertSort(data, l, mid - l + 1); =_k
if ((r - mid) > THRESHOLD) 8wkhbD|;
mergeSort(data, temp, mid + 1, r); 6Z#Nh@!+C
else 30^q_|l:]
insertSort(data, mid + 1, r - mid); O.Pp*sQ^
++,I`x+p
for (i = l; i <= mid; i++) { 85&7WAco"B
temp = data; ;?HP/dZLz
} Xf&YcHo
for (j = 1; j <= r - mid; j++) { X:Z3R0
temp[r - j + 1] = data[j + mid]; p)B/(%
} =a,qRO
int a = temp[l]; FA,n>
int b = temp[r]; o$L%t@
for (i = l, j = r, k = l; k <= r; k++) { bQ3<>e\%B
if (a < b) { c+3(|k-M
data[k] = temp[i++]; j$Ndq(<tG
a = temp; Nut&g"u2
} else { HQ"T>xb
data[k] = temp[j--]; 'm*W<
b = temp[j]; u $-&Im<
} 2EM6k|l5
} bI0xI[#Q
} }F{s\qUt
"|(.W3f1
/** m@kLZimD
* @param data 6inAnC@I
* @param l >C_G~R
* @param i .\$A7DD+A
*/ O1o>eDE5A
private void insertSort(int[] data, int start, int len) { Wx-0Ip'9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !~C%0{9+u@
} hA 5p'a+K
} {c)\}s(}F
} V $I8iVGL
} 9cB+x`+Lu
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堆排序： )I*(yUj
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package org.rut.util.algorithm.support; nQV0I"f]?]
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import org.rut.util.algorithm.SortUtil; u4FD}nV
!o`7$`%Wz\
/** (^iF)z
* @author treeroot [r"Oi| 8I
* @since 2006-2-2 RP{0+
* @version 1.0 c?CfM>
*/ rAP="H<
public class HeapSort implements SortUtil.Sort{ H'#06zP>5
h9 DUS,G9,
/* (non-Javadoc) ,(q] $eOZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) grE(8M
*/ 4#>Z.sf
public void sort(int[] data) { QSF0?Puf
MaxHeap h=new MaxHeap(); rtAPkXJFM
h.init(data); }y*D(`
for(int i=0;i h.remove(); R4 eu,,J
System.arraycopy(h.queue,1,data,0,data.length); U:8]G
} e bpt/q[
C)j/!+nh
private static class MaxHeap{ I\_2=mL
$i+@vbU6
void init(int[] data){ b}NNkM
this.queue=new int[data.length+1]; NUVKAAgMX
for(int i=0;i queue[++size]=data; DcBAncsK
fixUp(size); (y; 6H
} stK}K-=`
} 'A5T$JV.r4
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private int size=0; \k=dqWBr7
W2rd[W
private int[] queue; nxhlTf>3
d@ 8M_ O |
public int get() { :AlvWf$d
return queue[1]; Z:^#9D{
} M>5OC)E
+ Fo^NT
public void remove() { eZa7brC|
SortUtil.swap(queue,1,size--); V5$Gb6?K
fixDown(1); plPPf+\
} J|{50?S{^
file://fixdown t* Ct*
private void fixDown(int k) { "XxmiK
int j; c6 &k?Puy
while ((j = k << 1) <= size) { <vWP_yy
if (j < size %26amp;%26amp; queue[j] j++; rK'Lvt@w
if (queue[k]>queue[j]) file://不用交换 b||usv[or
break; o@gceZuk
SortUtil.swap(queue,j,k); #pPOQv:~
k = j; (bv{17K
} :@jctH~
} vC>2%Zgf-
private void fixUp(int k) { W7A!QS
while (k > 1) { O^CBa$
int j = k >> 1; uQc("F
if (queue[j]>queue[k]) VsSAb%
break; v#{Nh8n
SortUtil.swap(queue,j,k); >6yQuB
k = j; <eMqg u
} D"aK;_W@h
} }v}F8}4
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} 6bUP]^d
PcA^ jBgGl
} 9d|8c > I
8/j|=Q,5
SortUtil： ` Ny(S2
^@8XJ[C,_
package org.rut.util.algorithm; `},:dDHI
:k?`gm$
import org.rut.util.algorithm.support.BubbleSort; ;/kd.Q
import org.rut.util.algorithm.support.HeapSort; @k;65'"Q
import org.rut.util.algorithm.support.ImprovedMergeSort; VD&wO'U
import org.rut.util.algorithm.support.ImprovedQuickSort; @yb'h`f]
import org.rut.util.algorithm.support.InsertSort; m%u`#67oK
import org.rut.util.algorithm.support.MergeSort; f_O|
import org.rut.util.algorithm.support.QuickSort; &iw,||#
import org.rut.util.algorithm.support.SelectionSort; HdtGyh6X0
import org.rut.util.algorithm.support.ShellSort; l(rm0_
i/-IjgM"-
/** p5E okh
* @author treeroot !yj1X Ar
* @since 2006-2-2 ij:a+T
* @version 1.0 `q]' ^EzJ
*/ QyL]-zNg
public class SortUtil { oy jkk
public final static int INSERT = 1; j?*n@'
public final static int BUBBLE = 2; $!. [R}
public final static int SELECTION = 3; r4[=pfe25
public final static int SHELL = 4; 1lIs jBo g
public final static int QUICK = 5; K_Y{50#
public final static int IMPROVED_QUICK = 6; 2~hdJ/
public final static int MERGE = 7; wN'S+4
public final static int IMPROVED_MERGE = 8; @1'OuX^
public final static int HEAP = 9; Z?xaXFm_
_+P*XY5
public static void sort(int[] data) { 0 N7I:vJ
sort(data, IMPROVED_QUICK); p/_W*0/i
} 9;XbyA]
private static String[] name={ MVzj7~+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" p_BG#dRM
}; ^PFiO 12
V C VqUCc
private static Sort[] impl=new Sort[]{ ,d/$!Yf
new InsertSort(), {@L{l1|0
new BubbleSort(), gQik>gFr
new SelectionSort(), !bLCha\
new ShellSort(), En7+fQ
new QuickSort(), 0^Ldw)C"
new ImprovedQuickSort(), **__&Xp1
new MergeSort(), i#YDdz
new ImprovedMergeSort(), <H]PP6_g:
new HeapSort() ;DX{+Z[
}; Q(N'Oj:J
0_je@p+$
public static String toString(int algorithm){ ynra%"sd
return name[algorithm-1]; 6[XaIco=C
} {BM:c$3@j
VB |k
public static void sort(int[] data, int algorithm) { P\WHM(
impl[algorithm-1].sort(data); >DY/CcG\P
} Z(RsB_u5
)x[=}0C
public static interface Sort { m`zd0IRTP
public void sort(int[] data); w7~]c,$y.
} chD7^&5]
bny@AP(CY+
public static void swap(int[] data, int i, int j) { rkS'OC
int temp = data; +Q_xY>ej
data = data[j]; +e>G V61
data[j] = temp; "Vc|D (g
} bZWR.</
} YdvXp/P:|