[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; @or&GcQ*
} ;|5m;x/a
int i1=l; SoI"a^fY
int i2=mid+1; Kzfa4C
for(int cur=l;cur<=r;cur++){ )#N)w5DU
if(i1==mid+1) rp (nGiI
data[cur]=temp[i2++]; c~K^ooS-
else if(i2>r) 2xN1=ug
data[cur]=temp[i1++]; BC=U6>`/
else if(temp[i1] data[cur]=temp[i1++]; _p"nR
else hS/oOeG<Y
data[cur]=temp[i2++]; 8A~5@
} b7^VWX%
} Y.$'<1
3.Oc8(N^}
} g@BQ!}_#5
~q 0)+'
改进后的归并排序: =X'i^Q
JBo/<W#|
package org.rut.util.algorithm.support; rhGHR5 g
|[7xTD
import org.rut.util.algorithm.SortUtil; \cP\I5IW:s
>gtKyn]
/** T\55uQ
* @author treeroot 2;VggPpT
* @since 2006-2-2 Z?kLAhy!
* @version 1.0 SQ9s
*/ t9685s
public class ImprovedMergeSort implements SortUtil.Sort { !~u;CMR
NpG5$?
private static final int THRESHOLD = 10; ],YIEOx6
vr+O)/P})
/* eZ#nZB
* (non-Javadoc) BWamF{\d1a
* O]o`!c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B{^o}:e
*/ `j{q$Y=AG
public void sort(int[] data) { uO%G,b
int[] temp=new int[data.length]; \$n?J(N
mergeSort(data,temp,0,data.length-1); po~V{>fUm
} ;cgc\xm>
:Y`cgi0vkd
private void mergeSort(int[] data, int[] temp, int l, int r) { ![YLY&}s
int i, j, k; tt2`N3Eu\
int mid = (l + r) / 2; ?4GI19j
if (l == r) "E =\Vz
return; X YO09#>&
if ((mid - l) >= THRESHOLD) &^KmfT5C
mergeSort(data, temp, l, mid); 0*o)k6?q3
else 2iYf)MC
insertSort(data, l, mid - l + 1); .>NhC"
if ((r - mid) > THRESHOLD) !*_5 B'
mergeSort(data, temp, mid + 1, r); v<c~ '?YzO
else Bt[OGa(q
insertSort(data, mid + 1, r - mid); &(UVS0=Dp,
d~1Nct$:
for (i = l; i <= mid; i++) { MQ>.^]B]o
temp = data; {_ti*#
} ">PpC]Y1
for (j = 1; j <= r - mid; j++) { phr6@TI
temp[r - j + 1] = data[j + mid]; #K:|@d
} m_{OCHS+
int a = temp[l]; P{v>o,a.
int b = temp[r]; ;`Eie2y{M
for (i = l, j = r, k = l; k <= r; k++) { c|OIUc
if (a < b) { f|G,pDLx
data[k] = temp[i++]; @|! 9~F
a = temp; eJFGgJRIvF
} else { ij i<+oul
data[k] = temp[j--]; d5mhk[p7\J
b = temp[j]; '~Uo+<v$w
} 3)ac
} Z".mEF-b
} !mLQdkTE
`oQ)qa_
/** V~ph1Boz2
* @param data }GX[N\$N
* @param l SA@MJ>Z
* @param i 02OL-bv}HS
*/ x-O9|%aRJ
private void insertSort(int[] data, int start, int len) { :a3 +f5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `\LhEnIwu
} <;}jf*A
} wN1%;~?7
} gRA}sF
} 72@lDY4cE
c#X9d8>
堆排序： SJ$N]<d
_X5@%/Vz
package org.rut.util.algorithm.support; 9fp@d
2]W"sT[
import org.rut.util.algorithm.SortUtil; a-w=LpVM
Cj^:8 ?%
/** Gu} `X23
* @author treeroot Ln/6]CMl
* @since 2006-2-2 >Hb>wlYR
* @version 1.0 <8#Q5
*/ IH|PdVNtg
public class HeapSort implements SortUtil.Sort{ <j"}EEb^
ue8Cpn^M
/* (non-Javadoc) z*?-*6W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $OOZ-+8
*/ vpR^G`/
public void sort(int[] data) { I`Goc!5t
MaxHeap h=new MaxHeap(); *((wp4b
h.init(data); Itn7Kl
for(int i=0;i h.remove(); OL+dx`Y
System.arraycopy(h.queue,1,data,0,data.length); 0IU>KGJ-0s
} PAG.],"D
0?kaXD
private static class MaxHeap{ wcz|Zy
pm$ZKM
void init(int[] data){ pE.f}
this.queue=new int[data.length+1]; :C6
for(int i=0;i queue[++size]=data; 6b1f?0
fixUp(size); BZAeg">3
} 6f1%5&si
} Fl{:aq"3
u;1/.`NPB
private int size=0; :EOx>Pf_9)
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private int[] queue; 0].x8{~o
(bEX"U-
public int get() { 1n}q6oa=
return queue[1]; c32IO&W4
} .Cv0Ze
S;a'@5
public void remove() { K"~Tk`[0Q
SortUtil.swap(queue,1,size--); h%'4V<V
fixDown(1); ShXk\"
} yh9fHN)F
file://fixdown u{Jv6K,
private void fixDown(int k) { cI}qMc
int j; O^fg~g X
while ((j = k << 1) <= size) { 8\,|T2w,X
if (j < size %26amp;%26amp; queue[j] j++; A)9[.fhx
if (queue[k]>queue[j]) file://不用交换 *Z0Y:"
break; 6{h+(|.(
SortUtil.swap(queue,j,k); &0B<iO<f
k = j; d&S4`\g?8
} rGb7p`J
} ~AbnksR
private void fixUp(int k) { biwV7<
while (k > 1) { ~F5JN^5Y
int j = k >> 1; [NQ\(VQ1c
if (queue[j]>queue[k]) 5f+ziiZ
break; GA&mM
SortUtil.swap(queue,j,k); 5~(.:RX:q
k = j; zJ;K4)"j
} >:W7f2%8`
} a[TR_uR
IT,d(UV_
} uK6_HvHuy
_?UW,5=O
} DG_tmDT4
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SortUtil： kOfq6[JC
w k1O*_76
package org.rut.util.algorithm; !eb}jL
P'o:Vhm_H
import org.rut.util.algorithm.support.BubbleSort; cG|)z<Z
import org.rut.util.algorithm.support.HeapSort; HN'r ZAZ(
import org.rut.util.algorithm.support.ImprovedMergeSort; =)Z!qjf1U
import org.rut.util.algorithm.support.ImprovedQuickSort; f1R&Q
import org.rut.util.algorithm.support.InsertSort; rNzsc|a:
import org.rut.util.algorithm.support.MergeSort; 1rhsmcE
import org.rut.util.algorithm.support.QuickSort; 1d49z9F
import org.rut.util.algorithm.support.SelectionSort; @8zp(1.
import org.rut.util.algorithm.support.ShellSort; .54E*V1
_4E . P
/** W}+f}/&l
* @author treeroot .<`W2*1
* @since 2006-2-2 x+~IXi>Ig
* @version 1.0 |12Cg>;j*n
*/ g@WGd(o0)
public class SortUtil { a`}b'X:
public final static int INSERT = 1; {0(:7IY,
public final static int BUBBLE = 2; ;K[ G]8
public final static int SELECTION = 3; l!2hwRR
public final static int SHELL = 4; Dd+ f,$
public final static int QUICK = 5; %(4G[R[
public final static int IMPROVED_QUICK = 6; ~$g$31/
public final static int MERGE = 7; tPO\e]
public final static int IMPROVED_MERGE = 8; 1$,t:/'-4
public final static int HEAP = 9; gI^);JrTE
M1._{Jw5
public static void sort(int[] data) { GH%'YY3|
sort(data, IMPROVED_QUICK); (W~jr-O^
} W#cr9"'Ta
private static String[] name={ `Pj7O/!)#!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" p%304oP6
}; zGz^T
]h (TZu
private static Sort[] impl=new Sort[]{ u7|{~D&f
new InsertSort(), c"ukV_6~J
new BubbleSort(), 75Xi%mlE7
new SelectionSort(), XQEGMaZ
new ShellSort(), |xI\)VE^
new QuickSort(), OCy\aCp
new ImprovedQuickSort(), bH7[6#y$
new MergeSort(), 33d86H%;
new ImprovedMergeSort(), 6T6 S9A*nT
new HeapSort() hjiU{@q
}; oOk.Fq
B`Q.<Lqu
public static String toString(int algorithm){ '8~cf
return name[algorithm-1]; G~ZDXQ>5CP
} G9\Bi-'ul
l ' ]d&
public static void sort(int[] data, int algorithm) { 7Dy\-9:v
impl[algorithm-1].sort(data); 5qco4@8
} |(Zv g}c_
'< OB j
public static interface Sort { H~-zq}4
public void sort(int[] data); -&Fxg>FrYb
} %UJ!(_
m{={a5GD
public static void swap(int[] data, int i, int j) { ^RkHdA
int temp = data; &J|3uY,'j
data = data[j]; 3j.Ft*SV
data[j] = temp; 9GS<d.#Nvc
} Cna@3)_
} dN>XZv