[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; qp})4XTv
} 1>Sfv|ZP,
int i1=l; %1i:*~g
int i2=mid+1; :uCwWv
for(int cur=l;cur<=r;cur++){ syl7i>P
if(i1==mid+1) pJHdY)Cz
data[cur]=temp[i2++]; }yT/UlU
else if(i2>r) I$;`^z
data[cur]=temp[i1++]; \?n6l7*t>
else if(temp[i1] data[cur]=temp[i1++]; 7Eyi~jes
else w%])
data[cur]=temp[i2++]; a=MN:s?Fc0
} )E9!m
} =yod
poQ_r<I
} s<YN*~
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改进后的归并排序: apL$`{>US
r&LZH.$oh
package org.rut.util.algorithm.support; :!aLa}`@
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import org.rut.util.algorithm.SortUtil; yj:@Fg-3g
{)qr3-EM#
/** u> {aF{
* @author treeroot [Mu9"kF
* @since 2006-2-2 s@Q7F{z
* @version 1.0 $mJv\;t
*/ $ar^U
public class ImprovedMergeSort implements SortUtil.Sort { "1a;);S=*)
s{^B98d+W
private static final int THRESHOLD = 10; (_pw\zk>
c6:uM1V{
/* n-9xfn0U~#
* (non-Javadoc) HT.,BF
* do8[wej<:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xT>9ZZcE
*/ 'Ix@<$~i3F
public void sort(int[] data) { zmhc\M?z
int[] temp=new int[data.length]; z6`0Uv~
mergeSort(data,temp,0,data.length-1); eA& #33
} ;^N lq3N
QT c{7&
private void mergeSort(int[] data, int[] temp, int l, int r) { _<AkM"
int i, j, k; BH'*I yv
int mid = (l + r) / 2; v]SxZLa
if (l == r) *O[/KR%
return; Fip 5vrD
if ((mid - l) >= THRESHOLD) xKu#OH
mergeSort(data, temp, l, mid); {~9zuNi
else 6k hBT'n
insertSort(data, l, mid - l + 1); JMB#KzvN[
if ((r - mid) > THRESHOLD) tdK&vqq
mergeSort(data, temp, mid + 1, r); +2iD9X{$MX
else |3~m8v2-
insertSort(data, mid + 1, r - mid); _*H Hdd5I
(7qlp*8.s
for (i = l; i <= mid; i++) { zTc;-,
temp = data; 3@":&
} 1 *' /B
for (j = 1; j <= r - mid; j++) { %np(z&@wi
temp[r - j + 1] = data[j + mid]; BWxfY^,'&6
} uzHMQp
int a = temp[l]; ]$ d ;P
int b = temp[r]; #QFz /6
for (i = l, j = r, k = l; k <= r; k++) { kl]V_ 7[
if (a < b) { \a+Q5g
data[k] = temp[i++]; G_1r&[N3
a = temp; E_~e/y"-
} else { T^4 dHG-(
data[k] = temp[j--]; 0J+WCm`
b = temp[j]; z I2DQ] 9
} =0?5hxMd
} '1D$ ;
} ZbC$Fk,,I&
}W^@mi
/** ?1L<VL=b
* @param data RNc:qV<H
* @param l S`vt\g$ dN
* @param i +rv##Z
*/ poAJl;T
private void insertSort(int[] data, int start, int len) { `qJJ{<1&U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x1Gx9z9
} jOT/|k
} a]*{!V{$i
} E0I/]0
} ,Vq$>T@z
(nO2+@!
堆排序： rA ={;`
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package org.rut.util.algorithm.support; <n,QSy#
ulzX$
import org.rut.util.algorithm.SortUtil; J.R]) &CB
sg=G<50i
/** ~qZ6I)?
* @author treeroot G2N0'R"
* @since 2006-2-2 {d<XDx4`
* @version 1.0 ]A}ZaXd
*/ eGT&&Y
public class HeapSort implements SortUtil.Sort{ PESvx>:
' ds2\gN
/* (non-Javadoc) @U!&XZ]h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Pm6U:RL
*/ qv(3qY
public void sort(int[] data) { 6~sU[thGW
MaxHeap h=new MaxHeap(); iT:i '\~
h.init(data); 0\U*
for(int i=0;i h.remove(); \)5mO 8w
System.arraycopy(h.queue,1,data,0,data.length); CKHmJ]=
} i#4+l$q
pq r_{
private static class MaxHeap{ /RJ]MQ\*O
y0Gblza
void init(int[] data){ I(AlRh
this.queue=new int[data.length+1]; uDND o
for(int i=0;i queue[++size]=data; [>mH
fixUp(size); $}vzBuWHwN
} %0 {_b68x
} mS[``$Z\!
%\HE1d5;
private int size=0; x-c5iahp'
LU;zpXg\
private int[] queue; r+m.!+
Rd7U5MBEF
public int get() { [-[59H[6)
return queue[1]; rR":}LA^d
} "f 89
im9w|P5
public void remove() { @:RoYvk$
SortUtil.swap(queue,1,size--); $b2~Wj*-nJ
fixDown(1); 7w2$?k',-
} ECA<%'$?E
file://fixdown B-_b.4ND)
private void fixDown(int k) { _BA; H+M
int j; )V~=B]
while ((j = k << 1) <= size) { 5-GS@fY
if (j < size %26amp;%26amp; queue[j] j++; c*7|>7C$i
if (queue[k]>queue[j]) file://不用交换 !AJkd.
break; Bk3\NPa
SortUtil.swap(queue,j,k); p~3x=X4
k = j; T5|kO:CbHq
} 2DPv7\fW
} smfI+Z S"
private void fixUp(int k) { >U`G3(#7S
while (k > 1) { _p4]\LA
int j = k >> 1; #S9J9k
if (queue[j]>queue[k]) @Q,Q"c2
break; Z@dVK`nD
SortUtil.swap(queue,j,k); hsrf2Xw[
k = j; r!fUMDS
} z]rr Q=dAA
} nS3Aadm
BVeMV4
} X-nC2[tu'W
OWwqCPz.
} nl 'MWP
q 0F6MAXj
SortUtil： L~t< 0\r
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package org.rut.util.algorithm; WN=0s
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import org.rut.util.algorithm.support.BubbleSort; ,.0bE 9\o
import org.rut.util.algorithm.support.HeapSort; MuOKauYa
import org.rut.util.algorithm.support.ImprovedMergeSort; T4wk$R L
import org.rut.util.algorithm.support.ImprovedQuickSort; I[k"I(
import org.rut.util.algorithm.support.InsertSort; LWJ ?p-X
import org.rut.util.algorithm.support.MergeSort; \AroSy9
import org.rut.util.algorithm.support.QuickSort; 3E*m.jX
import org.rut.util.algorithm.support.SelectionSort; e^\e;>Dh>
import org.rut.util.algorithm.support.ShellSort; sq`Xz8u
i:aW .QZ.
/** :sg}e
* @author treeroot gm)Uyr$
* @since 2006-2-2 -JgNujt#9
* @version 1.0 ecs 0iW-,
*/ _Z[0:4
public class SortUtil { JXJ+lZmsz
public final static int INSERT = 1; h97#(_wV>
public final static int BUBBLE = 2; #{|cSaX<
public final static int SELECTION = 3; ;9OhK71}
public final static int SHELL = 4; cw!,.o%cD
public final static int QUICK = 5; `5@F'tKQ
public final static int IMPROVED_QUICK = 6; e9[72V
public final static int MERGE = 7; @p*)^D6E\
public final static int IMPROVED_MERGE = 8; GAgTy
public final static int HEAP = 9; 0uDDaFS
2.z-&lFBZ
public static void sort(int[] data) { KCTX2eNN&h
sort(data, IMPROVED_QUICK); >E<ib[vK[
} r+Ki`HD%
private static String[] name={ .^{%hc*w4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4c< s"2F
}; )k,n}
-n05Z@7
private static Sort[] impl=new Sort[]{ %BGg?&
new InsertSort(), y,nmPX?]n
new BubbleSort(), EB*sd S
new SelectionSort(), :_R:>n9 p
new ShellSort(), g.Xk6"kO
new QuickSort(), qazA,|L!
new ImprovedQuickSort(), :82h GU
new MergeSort(), kCTf>sJe
new ImprovedMergeSort(), b4_0XmL
new HeapSort() GkJcd;
}; _Ub `\ytx
l\s!A&L
public static String toString(int algorithm){ XH!#_jy
return name[algorithm-1]; /g<Oh{o8
} ~(d {j}M>
Tzex\]fw
public static void sort(int[] data, int algorithm) { C.jWT1
impl[algorithm-1].sort(data); zi-_l
} '}_r/l]K
E]`7_dG+T
public static interface Sort { 6CBk=)qH
public void sort(int[] data); QadguV6|
} 5Kg'&B (
$"kPzo~B_
public static void swap(int[] data, int i, int j) { sW[-qPK<
int temp = data; OH\^j1x9I
data = data[j]; hN-@_XSw<I
data[j] = temp; <>3)S`C`p
} ]b4IO4T
} |u&cN-}C d