[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; R0z?)uU#
} c@)pKi#W
int i1=l; YGi/]^Nba
int i2=mid+1; CD$u=E ]
for(int cur=l;cur<=r;cur++){ '&1
if(i1==mid+1) kz3?j<
data[cur]=temp[i2++]; D'Jm!Ap
else if(i2>r) z1)$
data[cur]=temp[i1++]; m.|qVN
else if(temp[i1] data[cur]=temp[i1++]; _-YL!oP
else Kn3YI9
data[cur]=temp[i2++]; | 3hT{
} -(|7`U
} A;b=E[iv
IH*U!_ `
} c g3Cl[s
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改进后的归并排序: uVoF<={
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package org.rut.util.algorithm.support; 8b8e^\l(
ktkn2Twa/
import org.rut.util.algorithm.SortUtil; d)pz
)ylv(qgV
/** ~pDRF(
* @author treeroot vCYSm 0
* @since 2006-2-2 Xq} n^W
* @version 1.0 nEeQL~:
*/ 3J'Bm"
public class ImprovedMergeSort implements SortUtil.Sort { 5e~ j
HMl!?%%
private static final int THRESHOLD = 10; wliGds
|*/uN~[
/* ir( -$*J
* (non-Javadoc) .If"'hMY
* ;C7BoHB9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FB?q/_
*/ [esX{6,i
public void sort(int[] data) { 1( QWt
int[] temp=new int[data.length]; &Sa_%:*D(
mergeSort(data,temp,0,data.length-1); y^0HCp{
} c,{&
UpE1PLZlB
private void mergeSort(int[] data, int[] temp, int l, int r) { P22y5z~
int i, j, k; ly[\mGr
int mid = (l + r) / 2; [<@A8Q5,y
if (l == r) ]k3GFPw
return; 71}L#nQ
if ((mid - l) >= THRESHOLD) %nG~u,_2f
mergeSort(data, temp, l, mid); f0N)N}y
else gz)wUQ|W
insertSort(data, l, mid - l + 1); -=v/p*v0o
if ((r - mid) > THRESHOLD) 8as$h*Wh
mergeSort(data, temp, mid + 1, r); d=c1WK
else %Hl:nT2M
insertSort(data, mid + 1, r - mid); m;$F@JJ
7#~m:K@
for (i = l; i <= mid; i++) { nEZ-h7lzl(
temp = data; =%#$HQ=
} 5Qm.ECXV
for (j = 1; j <= r - mid; j++) { leX7(Y;!a7
temp[r - j + 1] = data[j + mid]; p8}5x 2F
} *BP\6"X
int a = temp[l]; 1Q2k>q8
int b = temp[r]; k8t Na@H
for (i = l, j = r, k = l; k <= r; k++) { X<@y*?D9D
if (a < b) { :g]HB,78
data[k] = temp[i++]; pyb}ha
a = temp; 3gfV0C\
} else { ^r?sgJ
data[k] = temp[j--]; .k!k-QO5La
b = temp[j]; ,co9f.(w
} A=YEY n
} D/%b@Ls2ze
} 1rvf\[
|WwFE|<
/** +oKpA\mz
* @param data xhVq
* @param l VQW)qOR9
* @param i 0o^#Fmuz
*/ >-./kI "
private void insertSort(int[] data, int start, int len) { ^VLUZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); J1v0 \
} ] l qFht
} >i#_)th"U!
} #I{Yf(2Z
} rc{[\1 -N
}FdcbNsP
堆排序： ;?L[]Ezzt
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package org.rut.util.algorithm.support; w]P7!t
gm%bxr@X~
import org.rut.util.algorithm.SortUtil; k`J..f9
576-X_a,
/** i!+3uHWu`)
* @author treeroot p/^\(/\])
* @since 2006-2-2 =D"63fP1
* @version 1.0 HBf8!\0|/
*/ ?}>Z_ ("
public class HeapSort implements SortUtil.Sort{ < $?}^ 0R
;g)Fhdy!
/* (non-Javadoc) QT&Ws+@ s{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t-gNG!B
*/ uJ5%JB("E
public void sort(int[] data) { s!RA_%8/>
MaxHeap h=new MaxHeap(); Dqcu$V]
h.init(data); GbrPtu2{@V
for(int i=0;i h.remove(); qYiK bzy
System.arraycopy(h.queue,1,data,0,data.length); \fFy$
} 9QQ@Y}
$Aoqtz d\
private static class MaxHeap{ W%<]_u[-}
$j2)_(<A%Q
void init(int[] data){ ua>~$`@gX
this.queue=new int[data.length+1]; 58ZiCvqv
for(int i=0;i queue[++size]=data; D$!p+Q
fixUp(size); F^bQ-
} N#!1@!2BN
} T9v#Jb6
3&Zx*:
private int size=0; NHVx!Kc
8q[WfD
private int[] queue; 1,!\7@<CT
)0V]G{QN
public int get() { W>s9Mp
return queue[1]; ?-&D'
} NcMq>n
<>/MKMq!
public void remove() { Gqb-3ngH
SortUtil.swap(queue,1,size--); $P9$ ,w4
fixDown(1); KK3xz*W0
} 5va&N<U
file://fixdown {%~Ec4r
private void fixDown(int k) { 5 9HaTq
int j; r&~iEO|?\
while ((j = k << 1) <= size) { !td.ks0
if (j < size %26amp;%26amp; queue[j] j++; @[Qg}'i
if (queue[k]>queue[j]) file://不用交换 m)2hl~o_
break; Dk6\p~q
SortUtil.swap(queue,j,k); BQ)43Rr>
k = j; o5@P>\u>
} vX24W*7
} fx"+ZR
private void fixUp(int k) { yk6UuI^/
while (k > 1) { ,/U9v~
int j = k >> 1; uKzz/Y{
if (queue[j]>queue[k]) {NqGWkGt*b
break; 0|vWwZq
SortUtil.swap(queue,j,k); )F2tV ]k\
k = j; }H^^v[4
} Q*{ 2
} FLOJ
^Exq=oV
} R6.#gb8^oS
k~F/Ho+R&
} go Z#
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SortUtil： N Uml"
/YR$#&N2
package org.rut.util.algorithm; Db:WAjU
m,q<R1
import org.rut.util.algorithm.support.BubbleSort; "7/YhLq7
import org.rut.util.algorithm.support.HeapSort; +:Zi(SuS]
import org.rut.util.algorithm.support.ImprovedMergeSort; ^:j:;\;
import org.rut.util.algorithm.support.ImprovedQuickSort; TC}u[kM
import org.rut.util.algorithm.support.InsertSort; !A0bbJ
import org.rut.util.algorithm.support.MergeSort; Lj,%pzJ
import org.rut.util.algorithm.support.QuickSort; OaWq8MIZ-
import org.rut.util.algorithm.support.SelectionSort; [! BH3J!
import org.rut.util.algorithm.support.ShellSort; i*>yUav"
!!>G{
/** =?aB@&
* @author treeroot ,"ZlY}!Gn
* @since 2006-2-2 dj]N59<
* @version 1.0 r&RSQHa)
*/ N`MQHQ1
public class SortUtil { z<*]h^!3
public final static int INSERT = 1; ;hDr+&J|
public final static int BUBBLE = 2; I78pul8!
public final static int SELECTION = 3; WKML#U]5T
public final static int SHELL = 4; h^,a 1'
public final static int QUICK = 5; _=#mmZkq
public final static int IMPROVED_QUICK = 6; (1vS)v $L
public final static int MERGE = 7; ;wZ.p"T9^
public final static int IMPROVED_MERGE = 8; wl9icrR>
public final static int HEAP = 9; ".IhV<R
L 'y+^L|X
public static void sort(int[] data) { wuCODz@~
sort(data, IMPROVED_QUICK); '4EJ_Vhztc
} $v,_8{ !
private static String[] name={ utv.uwfat
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" uP:'e8
}; ja2LXM
* -)aGL
private static Sort[] impl=new Sort[]{ HXX"B,N
new InsertSort(), ~9=g"v
new BubbleSort(), *"wsMO
new SelectionSort(), 38F8(QU{
new ShellSort(), S"*wP[d.9
new QuickSort(), SX#ATf6#
new ImprovedQuickSort(), o/&Q^^Xj^~
new MergeSort(), K7|BXGL8r8
new ImprovedMergeSort(), {>#Ya;E
new HeapSort() Onao'sjY
}; 9#+X?|p+0
h1xYQF_`Z
public static String toString(int algorithm){ *5^h>Vk/
return name[algorithm-1]; ;-59#S&?tB
} 8WMC ~
/}Max@.`
public static void sort(int[] data, int algorithm) { YIfbcR5
impl[algorithm-1].sort(data); rRxqV?>n!
} D?$f[+
o4xZaF4+
public static interface Sort { QM=X<?m/,=
public void sort(int[] data); j:g/[_0s
} ne%ckW?ks
LaRY#9
public static void swap(int[] data, int i, int j) { -g~$HTsGm
int temp = data; vq|W&
data = data[j]; ZDlMkHJ
data[j] = temp; {=TD^>?
} _("{fJ,A
} w1[F]|