[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; BiY-u/bH9a
} dU}Cb?]7s
int i1=l; m+UWvUB)
int i2=mid+1; Sp7VH+
for(int cur=l;cur<=r;cur++){ R$XHjb)
if(i1==mid+1) _0cCTQE
data[cur]=temp[i2++]; A<h^.{
else if(i2>r) ai7R@~O:_k
data[cur]=temp[i1++]; "D\>oFu
else if(temp[i1] data[cur]=temp[i1++]; --fRhN>
else Bd'X~Vj<
data[cur]=temp[i2++]; ?"F9~vx&G
} ol0i^d*9F
} nxWm
@4t_cxmD
} 7vo8lnQ{
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改进后的归并排序: %p48=|+
H(hE;|q/
package org.rut.util.algorithm.support; i:a*6b.U@N
zif&;)wV/
import org.rut.util.algorithm.SortUtil; c"O4=[N: ;
[psZc'q
/** dhX$b!DA
* @author treeroot ^h$^j
* @since 2006-2-2 [vGkr" =
* @version 1.0 (himx8Uml2
*/ <x8I<K
public class ImprovedMergeSort implements SortUtil.Sort { &4O2uEW0
eo@kn yA<&
private static final int THRESHOLD = 10; hv
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/* #a`D6;
* (non-Javadoc) M7[GwA[Z +
* l k sNy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XS}-@5TI
*/ E^iShe
public void sort(int[] data) { C'y4 ~7
int[] temp=new int[data.length]; `fuQt4
mergeSort(data,temp,0,data.length-1); 7lx" X0w*m
} {Gr"lOi*@
z`qb>Y"xf3
private void mergeSort(int[] data, int[] temp, int l, int r) { i]#"@xQ
int i, j, k; UX2@eyejQ7
int mid = (l + r) / 2; V3% >TNp
if (l == r) ;^TSla+t+
return; 6b7c9n Z
if ((mid - l) >= THRESHOLD) y>#_LhTX-
mergeSort(data, temp, l, mid); X"jL
else zviTGhA
insertSort(data, l, mid - l + 1); /1v:eoF;
if ((r - mid) > THRESHOLD) P BVF'~f@j
mergeSort(data, temp, mid + 1, r); vM@8&,;
else vX7U|zy
insertSort(data, mid + 1, r - mid); ?n]adS{
k:&vW21E
for (i = l; i <= mid; i++) { yq?\.~ax
temp = data; Q>q-6/|UX
} R XCjYzt
for (j = 1; j <= r - mid; j++) { ?I8r2M]
temp[r - j + 1] = data[j + mid]; uHsLlfTn
} MK-+[K
int a = temp[l]; !|W.YbS
int b = temp[r]; eslvg#Q
for (i = l, j = r, k = l; k <= r; k++) { ]v/pMg#-
if (a < b) { NQGa=kXeJ
data[k] = temp[i++]; 4ClSl#X#i
a = temp; C2aA])7D
} else { **\?-*c=U
data[k] = temp[j--]; p+pu_T;~
b = temp[j]; &mW7FR'(
} K.=5p/^a
} =van<l4b#n
} y"Pd>61h
K5rra%a-7
/** P5H_iH
* @param data ]h#QA;
* @param l T, +=ka$
* @param i &1f3e
*/ v}J0j
private void insertSort(int[] data, int start, int len) { fP[S.7F+No
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2FW"uYA;6
} 2z.~K&+x
} )QWhzY
} (Hmm^MV)
} [7Q%c!e$*
:L{*B$c
堆排序： b9ud8wLE[
Uqz.Q\A
package org.rut.util.algorithm.support; QI'-I\Co
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import org.rut.util.algorithm.SortUtil; .R@s6}C`}=
aZ|?i }
/** em95ccs'-
* @author treeroot =W;e9 6#
* @since 2006-2-2 ubZJUm
* @version 1.0 S[gACEZ =
*/ 3~Lsa"/
public class HeapSort implements SortUtil.Sort{ c5|sda{
|g>Q3E
/* (non-Javadoc) )+"5($~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aM xd"cTzx
*/ ?K;l 5$?%
public void sort(int[] data) { jU kxA7 }}
MaxHeap h=new MaxHeap(); 1l/t|M^I
h.init(data); W mbIz[un
for(int i=0;i h.remove(); '=O1n H<
System.arraycopy(h.queue,1,data,0,data.length); 8{]nS8i
} @ze2'56F}
7x=4P|(\}
private static class MaxHeap{ @)x*62r+
,a?oGi
void init(int[] data){ 3;FV^V'
this.queue=new int[data.length+1]; Fc80HK5R
for(int i=0;i queue[++size]=data; dF09_nw
fixUp(size); BsA'r+ho?H
} ]kXWeY<
} a'`?kBK7`U
Ch3MwM5]
private int size=0; ]DU?N7J
_Rb2jq(&0
private int[] queue; <[D>[
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public int get() { `|Hk+V
return queue[1]; >_xuXEslUz
} BVj(Q}f8
liG|#ny{
public void remove() { sa&`CEa
SortUtil.swap(queue,1,size--); O_ZYm{T[7
fixDown(1); :8j7}'
} p!8phS#iP
file://fixdown Xtfs)"
private void fixDown(int k) { +Z2XP76(4A
int j; ZjMnGRP
while ((j = k << 1) <= size) { |`?&
if (j < size %26amp;%26amp; queue[j] j++; %$kd`Rl}
if (queue[k]>queue[j]) file://不用交换 }vh4ix
break; q*4U2_^.
SortUtil.swap(queue,j,k); \{]y(GT
k = j; (5E09K$
} ?pfr^ !@$
} Ue60Mf
private void fixUp(int k) { ;2\6U;
while (k > 1) { W8$0y2
int j = k >> 1; 122s7A
if (queue[j]>queue[k]) dCS f$5
break; ]jm:VF]4
SortUtil.swap(queue,j,k); ?]D))_|G
k = j; ^H7xFd|>
} Ef?hkq7X<
} 7)Vbp--b#
iF Mf[qBg
} nT}Wx/aT
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} i9De+3VqKK
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SortUtil： ,Pcg+^A
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package org.rut.util.algorithm; czU"
@MB)B5
import org.rut.util.algorithm.support.BubbleSort; `Fo/RZOW
import org.rut.util.algorithm.support.HeapSort; AoOA.t6RVo
import org.rut.util.algorithm.support.ImprovedMergeSort; d@1^U9sf
import org.rut.util.algorithm.support.ImprovedQuickSort; 0IdA!.|
import org.rut.util.algorithm.support.InsertSort; H8[A*uYL
import org.rut.util.algorithm.support.MergeSort; uSRhIKy
import org.rut.util.algorithm.support.QuickSort; A)3H`L
import org.rut.util.algorithm.support.SelectionSort; ,OubKcNg
import org.rut.util.algorithm.support.ShellSort; <qpzs@
R3U|{vgl
/** @!'}=?`
* @author treeroot 3(\D.Z
* @since 2006-2-2 K0_gMi+bR
* @version 1.0 @v^j<B
*/ }mK,Bi?bj
public class SortUtil { ^g|cRI_"
public final static int INSERT = 1; s[y.gR.(
public final static int BUBBLE = 2; !&hqj$>-}
public final static int SELECTION = 3; U-4F
public final static int SHELL = 4; mB"I(>q*M
public final static int QUICK = 5; {ri={p]l
public final static int IMPROVED_QUICK = 6; jLt3jN
public final static int MERGE = 7; LtX53c
public final static int IMPROVED_MERGE = 8; R'zi#FeP
public final static int HEAP = 9; v\4<6Z:4
*9$SFe|&n:
public static void sort(int[] data) { .,p=e$x]
sort(data, IMPROVED_QUICK); #"rK1Z
} ~=iH*AQR
private static String[] name={ K)mQcB-"?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" h*C!b?:"
}; )MK$E,W
Ze8.+Ee
private static Sort[] impl=new Sort[]{ 7+hF1eoI
new InsertSort(), viUJ4Pn
new BubbleSort(), 1w(3!Ps+
new SelectionSort(), j|wN7@Zc
new ShellSort(), 85H\v_[
new QuickSort(), 9QLG:(~;
new ImprovedQuickSort(), d[p2?]
new MergeSort(), <>9!oOa
new ImprovedMergeSort(), 1u7D:h>#
new HeapSort() ?YS>_MN
}; pKy4***I3
6(d6Uwc`
public static String toString(int algorithm){ <A8>To<
return name[algorithm-1]; 6V]m0{:E
} :,aY|2si
zA>X+JH>iw
public static void sort(int[] data, int algorithm) { !|xB>d q?
impl[algorithm-1].sort(data); t~j6wsx;
} \q1tT!]
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public static interface Sort { 'WE"$1
public void sort(int[] data); `qs}L
} ]&]DFY~n
C'|9nK$%
public static void swap(int[] data, int i, int j) { -Q@f),
int temp = data; i$<['DY
data = data[j]; 5X)M)"rq;V
data[j] = temp; *$-X&.h[
} =X7kADRq
} %eg+.