[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; F@m]Imn5Dx
} <sU?q<MC
int i1=l; Q-A:0F&{t
int i2=mid+1; xJCMxt2Y
for(int cur=l;cur<=r;cur++){ xBba&A]=
if(i1==mid+1) L`sg60z
data[cur]=temp[i2++]; gcS?r :
else if(i2>r) ?D 8<}~Do
data[cur]=temp[i1++]; JmMB=} <
else if(temp[i1] data[cur]=temp[i1++]; b02V#m;Z
else 'G] P09`*)
data[cur]=temp[i2++]; jb0wP01R
} s &4k
} #vwK6'z
TcW-pY<N
} 0L->e(Vf7u
;Fo%R$y
改进后的归并排序: UA>3,|gV1
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package org.rut.util.algorithm.support; r"E%U:y3P
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import org.rut.util.algorithm.SortUtil; /l.:GH36f
E6 g]EE
/** y!z2+q2
* @author treeroot Q#kSp8
* @since 2006-2-2 PjwDth A1
* @version 1.0 v,T:V#f^
*/ ,W8EU
public class ImprovedMergeSort implements SortUtil.Sort { RIC\f_Dv
o7gYj\
private static final int THRESHOLD = 10; $,Eb(j
3(2WO^zX {
/* n>t&l8g%g
* (non-Javadoc) 3o_)x
* @euH[<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V/.Na(C~
*/ _sp,,gz
public void sort(int[] data) { LDDgg u
int[] temp=new int[data.length]; $Cgl$A
mergeSort(data,temp,0,data.length-1); X| !VjUH
} I45 kPfu
h+gaKh=k+
private void mergeSort(int[] data, int[] temp, int l, int r) { RGu`Jk
int i, j, k; %IA1Y>`
int mid = (l + r) / 2; #!0=I s^
if (l == r) [Xa,|
return; )])nd"E
if ((mid - l) >= THRESHOLD) 1;*4yJ2
mergeSort(data, temp, l, mid); uI9eUO
else Vjdu9Ez
insertSort(data, l, mid - l + 1); Gye84C2E=
if ((r - mid) > THRESHOLD) (HEi;
mergeSort(data, temp, mid + 1, r); ]Cc3}+(s
else m&PB5s\=
insertSort(data, mid + 1, r - mid); 'iM#iA8
r*q
for (i = l; i <= mid; i++) { OXxgnn>W'
temp = data; bI-uF8"
} A`B>fI
for (j = 1; j <= r - mid; j++) { "[QQ(]={
temp[r - j + 1] = data[j + mid]; ~hZr1hT6L
} 70GwTK.{~
int a = temp[l]; %jE0Z4\
int b = temp[r]; a1>Tz
for (i = l, j = r, k = l; k <= r; k++) { ~GLWhe-
if (a < b) { cMfJq}C<
data[k] = temp[i++]; } =p e;l
a = temp; 9xN`
} else { Zt"#'1
data[k] = temp[j--]; {X\%7Zef+
b = temp[j]; *@VS^JB
} ynZp|'b?<
} U!GfDt
} ]Sey|/@D
<Fi*wV
/** | |u
* @param data }Ug O$1
* @param l oO3X>y{gN
* @param i p)qM{`]G\
*/ c(kYCVc
private void insertSort(int[] data, int start, int len) { Ez/>3:;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _ea|E 8
} xrZzfg
} {UFs1
} =o)B1(v@.
} !DM GAt\
Kr'Yz!
堆排序： +gyGA/5:d$
z41v5rB4
package org.rut.util.algorithm.support; 2M>`W5
0<XxR6w
import org.rut.util.algorithm.SortUtil; <^w4+5sT/
S-[S?&c`
/** ]i/Bq!d l
* @author treeroot zEKVyZd*{
* @since 2006-2-2 |\U5m6q
* @version 1.0 )zydD=,bu
*/ #Ibpf ,
public class HeapSort implements SortUtil.Sort{ 7.*Mmx~]=
=`k',V_
/* (non-Javadoc) {pXqw'"1.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (@Kc(>(: Y
*/ <2e[;$
public void sort(int[] data) { [;Jq=G8&t
MaxHeap h=new MaxHeap(); Ie[DTy
h.init(data); %l3f .
for(int i=0;i h.remove(); YCq:]
System.arraycopy(h.queue,1,data,0,data.length); n#5S-z1KNw
} xnDst9%
R:`)*=rL%
private static class MaxHeap{ I uC7Hx`z
GvBmh.
void init(int[] data){ y q!{\@-
this.queue=new int[data.length+1]; +} y"S-
for(int i=0;i queue[++size]=data; **.g^Pyc
fixUp(size); X4JSI%E
} i!*8@:VI
} C;%1XFzM
X2E=2tXl`7
private int size=0; #fDM{f0]R
5FE&
private int[] queue; _`.Q7
WFTwFm6
public int get() { tC5>K9Ed
return queue[1]; l(HxZlHr
} Y[s}?Xu]w#
HLCI
public void remove() { Ab8Ke|fA
SortUtil.swap(queue,1,size--); 1/v#Z#3[
fixDown(1); (3Z;c_N
} 3:>hHQi
file://fixdown #S(b2LEc
private void fixDown(int k) { >IipWTVo<
int j; *6G@8TIh
while ((j = k << 1) <= size) { %Iiu#- 'B
if (j < size %26amp;%26amp; queue[j] j++; "-Pz2QJY
if (queue[k]>queue[j]) file://不用交换 /i{V21(%
break; wlEK"kKU
SortUtil.swap(queue,j,k); \zeuvD
k = j; $WO{!R
} MS]Q\g}U
} rN,T}M=2
private void fixUp(int k) { /I:&P Pff
while (k > 1) { VI-6t"l
int j = k >> 1; nG-DtG^z
if (queue[j]>queue[k]) <O.|pJus
break; ?XV3Y3
SortUtil.swap(queue,j,k); ornU8H`
k = j; TkVqv v
} i7e_~K
} j_h0hm]
r^{Bw1+
} h@TP=
i.^:xZ
} y&V'GhW!dd
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SortUtil： i1K$~
!3{;oU%*
package org.rut.util.algorithm; av_ +M;G
F:~@e(
import org.rut.util.algorithm.support.BubbleSort; DG}s`'
import org.rut.util.algorithm.support.HeapSort; LQR^lD+_=
import org.rut.util.algorithm.support.ImprovedMergeSort; z6P~HF+&h
import org.rut.util.algorithm.support.ImprovedQuickSort; Ro;I%j
import org.rut.util.algorithm.support.InsertSort; n(i/jW~0w
import org.rut.util.algorithm.support.MergeSort; \Yn0|j>
import org.rut.util.algorithm.support.QuickSort; 06?d#{?M1o
import org.rut.util.algorithm.support.SelectionSort; hZw8*H^tP
import org.rut.util.algorithm.support.ShellSort; 1vS-m x
%j2$ ezud
/** XM#nb$gl
* @author treeroot 8A}<-?>
* @since 2006-2-2 2%*\XPt)
* @version 1.0 yF1p^>*ak&
*/ Zy.3yQM9i
public class SortUtil { !,C8
public final static int INSERT = 1; ?6HnN0A)
public final static int BUBBLE = 2; [7NO !^
public final static int SELECTION = 3; O<ybiPR
public final static int SHELL = 4; T^{=cx9x9
public final static int QUICK = 5; 2H`>Kj
public final static int IMPROVED_QUICK = 6; Ktu~%)k%
public final static int MERGE = 7; Xq<_r^
public final static int IMPROVED_MERGE = 8; +~=j3U
public final static int HEAP = 9; bcT'!:
3`)ej`
public static void sort(int[] data) { drvrj~o:
sort(data, IMPROVED_QUICK); 'ka$@,s:
} wEN[o18{
private static String[] name={ suYbD!`(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" sk*vmxClY
}; A~^x*#q{4
^8YBW<9
private static Sort[] impl=new Sort[]{ Vol}wc
new InsertSort(), k3KT':*
new BubbleSort(), ig .
new SelectionSort(), < +kdL
new ShellSort(), z:
new QuickSort(), -%Rbd0gVH\
new ImprovedQuickSort(), 9p1@Lfbj
new MergeSort(), +n$ruoRJh
new ImprovedMergeSort(), TQPrOs?
new HeapSort() ]h=5d09z
}; t*dq*(3"c
URt+MTU[
public static String toString(int algorithm){ Z3=N= xY]
return name[algorithm-1]; `C$QR 8
} w9mAeGyE
7 toIbC#
public static void sort(int[] data, int algorithm) { Xbrc_V\_
impl[algorithm-1].sort(data); NqveL<r`
} #k[Y(_
k+J63+obd
public static interface Sort { IYHNN
public void sort(int[] data); l?YO!$
} rq Uk_|Xa
l;&kX6 w
public static void swap(int[] data, int i, int j) { mNEh\4ai
int temp = data; B=7maYeU
data = data[j]; NFC/4
data[j] = temp; $o9@ ?2
} HLdHyK/S
} T LF'7ufq