[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; %efGt6&
} " ~Q*XN2
int i1=l; mUXk9X%n
int i2=mid+1; ohZx03
for(int cur=l;cur<=r;cur++){ x7ATI[b[
if(i1==mid+1) NPU^)B
data[cur]=temp[i2++]; S7sb7c'4 k
else if(i2>r) \9m*(_Qf
data[cur]=temp[i1++]; ?Myh7
else if(temp[i1] data[cur]=temp[i1++]; O.\h'3C
else 7sV/_3H+
data[cur]=temp[i2++]; 3oBC
} (F5ttQPh
} -F`he=Ev9
MOZu.NmO
} otriif@+Z
zB)%lb
改进后的归并排序: >{&A%b4JF
VWa|Y@Dc]
package org.rut.util.algorithm.support; zG% |0
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import org.rut.util.algorithm.SortUtil; \+B?}P8N*l
JZx%J)
/** [X"k> Sq
* @author treeroot VTw/_Hf2p
* @since 2006-2-2 ~ =.CTm]vf
* @version 1.0 iCi>zJ
*/ rK=6]j(K
public class ImprovedMergeSort implements SortUtil.Sort { Ye|G44z
I'_v{k5ZI
private static final int THRESHOLD = 10; &L3#:jSk
:JV\){P
/* .h8M
* (non-Javadoc) \qq-smcM-
* z,Xk\@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5si}i'in
*/ 7'.s7& '7
public void sort(int[] data) { %C*^:\y
int[] temp=new int[data.length]; gGbI3^r#
mergeSort(data,temp,0,data.length-1); PrnrXl S
} n`<S&KP|
TA;,>f*
private void mergeSort(int[] data, int[] temp, int l, int r) { uBeNXOre
int i, j, k; ntHT
int mid = (l + r) / 2; " i`8l.Lc
if (l == r) qx%jAs+~
return; >]/dOH,A
if ((mid - l) >= THRESHOLD) 'lQYJ0
mergeSort(data, temp, l, mid); ~ x`7)3
else vInFo.e[4
insertSort(data, l, mid - l + 1); g!^J,e=
if ((r - mid) > THRESHOLD) $9H[3OZPVv
mergeSort(data, temp, mid + 1, r); jT^!J+?6K+
else 0xP:9rm
insertSort(data, mid + 1, r - mid); {hd-w4"115
OmNn,PCl8
for (i = l; i <= mid; i++) { #"r kuDO
temp = data; `ue?Z%p|
} }tR'Hz2
for (j = 1; j <= r - mid; j++) { qJ Gm8^b-
temp[r - j + 1] = data[j + mid]; =]KIkS3
} Wem?{kx0
int a = temp[l]; 3+ asP&n
int b = temp[r]; {3 o%d:
for (i = l, j = r, k = l; k <= r; k++) { H m8y]>$
if (a < b) { I#c(J
data[k] = temp[i++]; iS05YW
a = temp; A2_Ls;]
} else { 6Ct0hk4
data[k] = temp[j--]; G"Pj6QUva
b = temp[j]; u}CG>^0C
} %EIUAG
} $rB!Ex{@ac
} ?`i|"y#
b%<jUY
/** ,.7vBt6 p
* @param data !E0fGh
* @param l MPG+B/P&
* @param i g RU-g
*/ gV`S%
private void insertSort(int[] data, int start, int len) { <G9<"{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DpNX66O
} O3xz|&xY&
} m)k-uWc$C
} I}%mfojC
} }K;iJ~kD1
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堆排序： D(@SnI+
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package org.rut.util.algorithm.support; Zh? V,39
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import org.rut.util.algorithm.SortUtil; wRi~Yb?
+{^'i P
/** %IU4\ZY>
* @author treeroot 5~yQ>h
* @since 2006-2-2 I1v@\Rb
* @version 1.0 NYwGK|
*/ w(#:PsMo<
public class HeapSort implements SortUtil.Sort{ GZ,j?@
0#]!#1utg
/* (non-Javadoc) 0STk)>3$-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SZE`J:w
*/ 4K'|DO|dH
public void sort(int[] data) { ZmP1C`>
MaxHeap h=new MaxHeap(); o{g@Nk'f
h.init(data); VLx T"]f
for(int i=0;i h.remove(); iz(m3k:w
System.arraycopy(h.queue,1,data,0,data.length); R05T5Q1]A
} 6Ok,_ !
CQjV!d0j
private static class MaxHeap{ 30BR0C
<L%HG
void init(int[] data){ lXw;|dGF
this.queue=new int[data.length+1]; vhX-Qkt}
for(int i=0;i queue[++size]=data; 'N|2vbi<
fixUp(size); rNxG0^k(
} G\uU- z$)
} W n6,U=$3
7s!AHyZ
private int size=0; ec#_olG%
c%b\CP\)W
private int[] queue; x@Sra@
%Au T8
public int get() { nE^wxtY
return queue[1]; k=FcPF"
} pBvo M={2!
W*3o|x
public void remove() { Ipg\9*c`
SortUtil.swap(queue,1,size--); JqQ3C}z
fixDown(1); a0)vvo=bz
} &!4( 0u
file://fixdown tRkrV]K
private void fixDown(int k) { zK,~37)\
int j; "wF*O"WQo
while ((j = k << 1) <= size) { Lq%[A*`^
if (j < size %26amp;%26amp; queue[j] j++; 65uZLsQ
if (queue[k]>queue[j]) file://不用交换 -z&9DWH
break; 83B\+]{hD
SortUtil.swap(queue,j,k); v F]
k = j; tI `w;e%HN
} "3v7gtGG
} -5o?#%
private void fixUp(int k) { Hc>([?P%t
while (k > 1) { 8R&z3k;!t
int j = k >> 1; rT o%=0P
if (queue[j]>queue[k]) 1XQ87~
break; YBR)s\*
SortUtil.swap(queue,j,k); gca|?tt
k = j; s!bHS_\e|
} +V6j`
} rknzo]N,
MG;4M>H
} IM$'J
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} `Nkx7Z~w:
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SortUtil： ozT._C
T..-)kL+p
package org.rut.util.algorithm; G &m>Ov$#&
[;)~nPjI
import org.rut.util.algorithm.support.BubbleSort; :U7;M}0
import org.rut.util.algorithm.support.HeapSort; n})
import org.rut.util.algorithm.support.ImprovedMergeSort; $&bU2]
import org.rut.util.algorithm.support.ImprovedQuickSort; DrW/KU,{+(
import org.rut.util.algorithm.support.InsertSort; LPsh?Ca?N
import org.rut.util.algorithm.support.MergeSort; %L.lkRs
import org.rut.util.algorithm.support.QuickSort; Lqg7D\7j
import org.rut.util.algorithm.support.SelectionSort; w6%l8+{R
import org.rut.util.algorithm.support.ShellSort; 5/*)+
%`bLmfm
/** ;<86P3S
* @author treeroot y>?k<)nA{
* @since 2006-2-2 &mCs%l
* @version 1.0 ( ?atGFgu
*/ *4zoAslU1
public class SortUtil { >:="?'N5l!
public final static int INSERT = 1; g]:..W7
public final static int BUBBLE = 2; V=:,]fTr
public final static int SELECTION = 3; AviT+^7E
public final static int SHELL = 4; Kv(Y }
public final static int QUICK = 5; 3xc:Y> *`
public final static int IMPROVED_QUICK = 6; rjfc.l#v
public final static int MERGE = 7; 4X<Oux*
public final static int IMPROVED_MERGE = 8; FuIWiO(
public final static int HEAP = 9; Z#H@BWN7
dP$y>%cB
public static void sort(int[] data) { Vjv6\;tt8
sort(data, IMPROVED_QUICK); t201ud2$
} KB$ vQ@N
private static String[] name={ ;""-[4C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" = .fc"R|<K
}; 8f5%xY$
5;r({J
private static Sort[] impl=new Sort[]{ :DF`A(
new InsertSort(), ;Of?fe5:
new BubbleSort(), Q&\ZC?y4
new SelectionSort(), Tom}sFl][
new ShellSort(), GA({ri
new QuickSort(), qg/Y;tGSx
new ImprovedQuickSort(), pmE1EDPag
new MergeSort(), Nj! R9N
new ImprovedMergeSort(), ZYpD8u6U
new HeapSort() h+\$Z]
}; Ke'YM{
EfMG(oI
public static String toString(int algorithm){ H{p[Ghp
return name[algorithm-1]; +z{x 7
} D_L'x"
B'<O)"1w
public static void sort(int[] data, int algorithm) { c~Q`{2%+
impl[algorithm-1].sort(data); #l8K8GLuf
} ;tZ}i4Ud
C={sE*&dYX
public static interface Sort { q{N lF$X
public void sort(int[] data); B{=,VwaP_
} 6'3Ey'drH
6EW"8RG`
public static void swap(int[] data, int i, int j) { 4c493QOd
int temp = data; J-HabHv
data = data[j]; G5C#i7cpm
data[j] = temp; oW` *FD
} B)LXxdkOn
} /0'fcjOaQ