[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; ee9nfvG-
} @H?_x/qBT
int i1=l; 6tKm'`^z4
int i2=mid+1; ~jqG
for(int cur=l;cur<=r;cur++){ 0A7 qO1%xw
if(i1==mid+1) I`O)I&KH
data[cur]=temp[i2++]; ~MOab e
else if(i2>r) 4IW7^Pq`P
data[cur]=temp[i1++]; }E}b/ulg1
else if(temp[i1] data[cur]=temp[i1++]; -X)KY_Xn@/
else ~PoBvHi
data[cur]=temp[i2++]; [J6*Q9B<V&
} o,#[Se*n
} D m|_;iO,
%S2^i3
} -@wnQ?
5tIM@,.I/
改进后的归并排序: c|s*(WljY
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package org.rut.util.algorithm.support; ~;pv&s5}
UX9r_U5)
import org.rut.util.algorithm.SortUtil; $h({x~Oj9
JpFfO<uO
/** :-I~-Yj
* @author treeroot 3e<FlH{
* @since 2006-2-2 |#r[{2sS
* @version 1.0 8, >YB+Hb
*/ z&"-%l.b@}
public class ImprovedMergeSort implements SortUtil.Sort { u)DhkF|
#\Q{?F!4
private static final int THRESHOLD = 10; XuQ7nlbnq
KvFGwq"X
/* 7,\Uk|
* (non-Javadoc) m}x&]">9
* :[#~,TW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }P5zf$
*/ _>G=v!
public void sort(int[] data) { 4|&7j7<u
int[] temp=new int[data.length]; Bhy:" r%#
mergeSort(data,temp,0,data.length-1); ON(H7
} GYx_9"J\5
ed,w-;(n~
private void mergeSort(int[] data, int[] temp, int l, int r) { >@2l/x8;
int i, j, k; Dn6k,nVh
int mid = (l + r) / 2; `o9vE0^T<
if (l == r) <By6%<JTn
return; F^m`j6
if ((mid - l) >= THRESHOLD) V7zF5=w
mergeSort(data, temp, l, mid); Pgy&/-u
else +&W%]KEh
insertSort(data, l, mid - l + 1); m"2KAq61
if ((r - mid) > THRESHOLD) FyZa1%Tv@
mergeSort(data, temp, mid + 1, r); k \|[=
else Wp0e?bK_
insertSort(data, mid + 1, r - mid); Z=ayVsJ3
q<YteuZJ,
for (i = l; i <= mid; i++) { 4{:W5eT!/
temp = data; $II[b-X?S
} /\%K7\
for (j = 1; j <= r - mid; j++) { Q]';1#J\
temp[r - j + 1] = data[j + mid]; H$^b.5K
} 9I a4PPEH1
int a = temp[l]; ?G5JAG`
int b = temp[r]; .b4_O CGg
for (i = l, j = r, k = l; k <= r; k++) { 9.KOrg5}L
if (a < b) { :qV}v2
data[k] = temp[i++]; %SRUHx[D
a = temp; 1PMBo=SUe8
} else { d9zI A6y
data[k] = temp[j--]; >uok\sX
b = temp[j]; @#T*OH
} dQ=mg#(
} hcw)qB,s
} KzQ\A!qG
_YXk,ME!Q
/** c2}?[\U]
* @param data E^.y$d~dS
* @param l G`9\v=0
* @param i >IW0YIQy,
*/ ;79X#hI
private void insertSort(int[] data, int start, int len) { Wgl7)Xk.)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `<Z5/;a5W
} YfC1.8
} P@Wi^svj
} UTEUVcJ\
} w_po5[]R
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堆排序： ^X6fgsjz
7$(>Z^ Em
package org.rut.util.algorithm.support; (+<SR5,/3
|Ire#0Nwx
import org.rut.util.algorithm.SortUtil; Do7&OBI~
<RmI)g>'_^
/** %]JSDb=C
* @author treeroot u>Z0ug6x
* @since 2006-2-2 Epm\=s
* @version 1.0 3~"G(UP
*/ fF208A7U I
public class HeapSort implements SortUtil.Sort{ .:tAZZ
)5Ddvz>+
/* (non-Javadoc) A KO#$OJE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AL/q6PWi
*/ \UI7H1XDH
public void sort(int[] data) { ]X,C9
MaxHeap h=new MaxHeap(); [&n2 yt
h.init(data); ]HP aM
for(int i=0;i h.remove(); @O}%sjC1
System.arraycopy(h.queue,1,data,0,data.length); 7Op6>i
} fX).A`
X>w(^L*>
private static class MaxHeap{ ](3e +JC
Cf`s:A5<J
void init(int[] data){ ]/!#:
this.queue=new int[data.length+1]; jX^uNmb
for(int i=0;i queue[++size]=data; 8kQ >M
fixUp(size); Vx@JP93|
} SI=vA\e
} sE$!MQb
'rJkxU{
private int size=0; A4.Q\0
`}gjfu -'\
private int[] queue; YC#N],#
SMVn2H@
public int get() { fu3/n@L
return queue[1]; w-?_U7'
} dzMlfJp
4l+"J:,
public void remove() { V6Kw71'9
SortUtil.swap(queue,1,size--); oLEqy
fixDown(1); m72r6Yq2@
} K_ P08
file://fixdown Qvh: hkR
private void fixDown(int k) { y^:!]-+
int j; WpE\N0Yg
while ((j = k << 1) <= size) { (J8(_MF
if (j < size %26amp;%26amp; queue[j] j++; Tj}H3/2
if (queue[k]>queue[j]) file://不用交换 PSz|I8 c
break; fOEw]B#@
SortUtil.swap(queue,j,k); T+7O+X#
k = j; won;tO]\;@
} m@)~.E
} b: UTq 7^
private void fixUp(int k) { [(U:1&x&
while (k > 1) { X>^St&B}fC
int j = k >> 1; X4LU/f<f
if (queue[j]>queue[k]) iJE $3
break; VdpwZ
SortUtil.swap(queue,j,k); (K"U#Zn
k = j; ~G.'pyW
} ohqi4Y!j/~
} '`Eb].s*
a#t:+iw
} MPx%#'Q
Dbt"}#uit;
} 9|v3lGK(
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SortUtil： =n>&Bl-Bl
pIBL85Xe
package org.rut.util.algorithm; 1e.V%!Xk
m,KG}KX
import org.rut.util.algorithm.support.BubbleSort; XVcY?_AS#
import org.rut.util.algorithm.support.HeapSort; (LzVWz m
import org.rut.util.algorithm.support.ImprovedMergeSort; 4{JoeIRyz
import org.rut.util.algorithm.support.ImprovedQuickSort; Tg|0!0qD]F
import org.rut.util.algorithm.support.InsertSort; zKB$n.H
import org.rut.util.algorithm.support.MergeSort; 2TB>d+
import org.rut.util.algorithm.support.QuickSort; ssGp:{]v/
import org.rut.util.algorithm.support.SelectionSort; e?FjN 9
import org.rut.util.algorithm.support.ShellSort; 33dHTV
BH"f\oc
/** x5[wF6A
* @author treeroot $'FPsoH
* @since 2006-2-2 ?-w<H!Y7
* @version 1.0 4lMf'V7*l
*/ *;7~aM
public class SortUtil { X}*\/(fzl
public final static int INSERT = 1; H&`0I$8m
public final static int BUBBLE = 2; D?ojxHe
public final static int SELECTION = 3; k I
public final static int SHELL = 4; P%w)*);
public final static int QUICK = 5; 3Au3>q,
public final static int IMPROVED_QUICK = 6; G^E"#F
public final static int MERGE = 7; m{T:<:q~
public final static int IMPROVED_MERGE = 8; J:g4ES-/
public final static int HEAP = 9; *HiN:30DZ
6v(?Lr`D
public static void sort(int[] data) { 2wR?ON=Q
sort(data, IMPROVED_QUICK); @I_!q*
} SB"Uu2)wZ
private static String[] name={ % NSb8@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]\DZW4?'
}; 4mYJi#e6x
9Z,K
private static Sort[] impl=new Sort[]{ Fo\* Cr9D
new InsertSort(), Sep/N"7~t
new BubbleSort(), w)}' {]P"c
new SelectionSort(), /G*]3=cSe
new ShellSort(), >1luLp/,$
new QuickSort(), ;ED` 7
new ImprovedQuickSort(), JmlMfMpXMs
new MergeSort(), t!^ j0q
new ImprovedMergeSort(), ZSWKVTi
new HeapSort() 'x/pV5[hQ
}; KV&4Ep#
7dxTyn=
public static String toString(int algorithm){ PydU.,^7
return name[algorithm-1]; ]J|]IPXy
} G,o5JL"t
JK.<(=y\
public static void sort(int[] data, int algorithm) { $W}YXLFj?
impl[algorithm-1].sort(data); '0ks`a4q
} hbfN1"z
Tfsx&k\
public static interface Sort { Lt'FA
public void sort(int[] data); LT+QW
} =(]yl_
s}w?Dvo\
public static void swap(int[] data, int i, int j) { ::<v; `l
int temp = data; J ZH~ {
data = data[j]; y}aKL(AaU
data[j] = temp; /i:c!l9
} a ][t#`
} \tCxz(vKz