[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; fa!3/X+
} lFp!XZ!
int i1=l; f MY;
int i2=mid+1; ).0V%}>
for(int cur=l;cur<=r;cur++){ F!OOrW]p0
if(i1==mid+1) a%7"_{s1
data[cur]=temp[i2++]; ,+ns {ppn
else if(i2>r) ;[{:'^n
data[cur]=temp[i1++]; z:Xj_ `p
else if(temp[i1] data[cur]=temp[i1++]; N,j>;x3xT
else !lQ#sL`
data[cur]=temp[i2++]; Z?~gQ $
} [{S;%Jj*X/
} ?%cn'=>ZI
-yX.Jv
} jIAW-hc]
-`zG_]=-
改进后的归并排序: js:C mnI
do:QH.q8)
package org.rut.util.algorithm.support; tA`mD>[
*.kj]BoO
import org.rut.util.algorithm.SortUtil; Cz'xGW{
!lR0w|
/** KWFyw>*)
* @author treeroot m>]>$=%
* @since 2006-2-2 eaV3)uP
* @version 1.0 Dk)@>l:gI,
*/ `fQM
public class ImprovedMergeSort implements SortUtil.Sort { `t{D7I7
;Y Dv.I
private static final int THRESHOLD = 10; )8pcf`h{
R#Y50hzT
/* O24Jj\"
* (non-Javadoc) [ 3$.*
* tO?21?AD D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7*zB*"B'1t
*/ w) =eMdj\o
public void sort(int[] data) { f!5F]qP>-
int[] temp=new int[data.length]; ;EK(b
mergeSort(data,temp,0,data.length-1); -L@]I$Yo
} +VSZhg,Np8
>?S\~Y
private void mergeSort(int[] data, int[] temp, int l, int r) { x Z|&/Ci
int i, j, k; %z(9lAe
int mid = (l + r) / 2; WwW"fkv
if (l == r) pG0!ALT
return; |if'_x1V
if ((mid - l) >= THRESHOLD) |WB"=PE
mergeSort(data, temp, l, mid); ]}BB/KQy^
else CfQf7-
insertSort(data, l, mid - l + 1); fH-NU-"
if ((r - mid) > THRESHOLD) j h; 9 [
mergeSort(data, temp, mid + 1, r); iPMB$SdfO
else ,+~2&>wj
insertSort(data, mid + 1, r - mid); Q2*/`L}m\
N1PECLS?
for (i = l; i <= mid; i++) { O x{Q.l
temp = data; |kId8WtA
} q#;BhPc
for (j = 1; j <= r - mid; j++) { m'd^?Qc
temp[r - j + 1] = data[j + mid]; ;xL67e%?
} h]qT1(I
int a = temp[l]; F vj{@B!
int b = temp[r]; SV&kWbS
for (i = l, j = r, k = l; k <= r; k++) { !d\t:0;
if (a < b) { ,,S9$@R
data[k] = temp[i++]; K6E}";;
a = temp; <#>Oy&E
} else { "cwR^DoD&
data[k] = temp[j--]; f:xUPH?+
b = temp[j]; [1NaH
} i#k-)N _$
} u0xQ;BQ
} *]5z^> q;7
*%3oyWwCd
/** ,NDh@VYe
* @param data !;i*\ a
* @param l 5!~!j "q
* @param i S0F@#mSQ?
*/ fVYiwE=F
private void insertSort(int[] data, int start, int len) { LaDY`u0G%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Gi*<~`Gr
} P2Onkl
} kg:l:C)Tq
} VO9XkA7
} [KMS<4t'
C(s\LI!r
堆排序： w}d}hI
PQ,+hq
package org.rut.util.algorithm.support; jA,|JgN|n
)i @1XH"D
import org.rut.util.algorithm.SortUtil; &RWM<6JP
KCD5*xH
/** D%A@lMru
* @author treeroot J2'K?|,m
* @since 2006-2-2 QskUdzQ=
* @version 1.0 i(0hvV>'
*/ BH5w@
public class HeapSort implements SortUtil.Sort{ prUHjS
85} ii{S
/* (non-Javadoc) Bq *[c=(2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q8/ihA6:
*/ ms7SoYbSu
public void sort(int[] data) { IQIbz{bMx
MaxHeap h=new MaxHeap(); $Buf#8)F*
h.init(data); )i0 $j)R
for(int i=0;i h.remove(); U,HIB^= R
System.arraycopy(h.queue,1,data,0,data.length); 9Fk4|+OJ
} %lV@:"G
[7RheXO<
private static class MaxHeap{ gGmxx,i
FRgLlp8x
void init(int[] data){ {EL'd!v7e
this.queue=new int[data.length+1]; -Un=TX
for(int i=0;i queue[++size]=data; uWTN2jr
fixUp(size); N#UXP5C(
} b_vVB`>
} P% Q@9kO>
t=i/xG:5
private int size=0; qC..\{z
V}SyD(8~
private int[] queue; iD<6t_8),
\e|U9;Mf
public int get() { Mb/L~gd"
return queue[1]; 9Eg&CZ,9$D
} JR)/c6j
SF^x=[ir
public void remove() { .EG*+,
SortUtil.swap(queue,1,size--); SW#BZ3L
fixDown(1); E+z18Lf?
} =53bLzr
file://fixdown )tD6=Iz^5
private void fixDown(int k) { .gq(C9<B[
int j; <5I1DF[
while ((j = k << 1) <= size) { 5qRc4d'
if (j < size %26amp;%26amp; queue[j] j++; r4?b0&Xq
if (queue[k]>queue[j]) file://不用交换 5>P7]?U.]
break; JpmB;aL#%
SortUtil.swap(queue,j,k); ]n5"Z,K
k = j; ]^ #`j
} zP&q7 t;>
} ZBJ3VK
private void fixUp(int k) { -w~(3(
while (k > 1) { .'/l'>
int j = k >> 1; b_=8!Q.:
if (queue[j]>queue[k]) 2e.N"eLNt
break; IA2GUnUhu
SortUtil.swap(queue,j,k); b=1%pX_
k = j; O3Uh+gKQ
} 1ef'7a7e8
} w;+ br
AW/wI6[T
} (Y2mmd
.T$D^?G!D
} 13a(FG
[4XC#OgA
SortUtil： vbp-`M(
;v_V+t<$
package org.rut.util.algorithm; O:^'x*}
l E^*t`+
import org.rut.util.algorithm.support.BubbleSort; c#QFG1
import org.rut.util.algorithm.support.HeapSort; qo_]ZKL44
import org.rut.util.algorithm.support.ImprovedMergeSort; e\9g->DUs
import org.rut.util.algorithm.support.ImprovedQuickSort; _!!}'fMC
import org.rut.util.algorithm.support.InsertSort; VNj@5s
import org.rut.util.algorithm.support.MergeSort; ]'k[u
import org.rut.util.algorithm.support.QuickSort; ?'sXgo.}
import org.rut.util.algorithm.support.SelectionSort; !)c=1EX]"
import org.rut.util.algorithm.support.ShellSort; ],[)uTZc
-CD\+d "
/** ^i'y6J
* @author treeroot :Q-oV8t{
* @since 2006-2-2 d0 -~|`5
* @version 1.0 HH8;J66I&
*/ etyCrQ ?U
public class SortUtil { ZXt?[Ll
public final static int INSERT = 1; ~+HoSXu@E
public final static int BUBBLE = 2; k|FSz#Y
public final static int SELECTION = 3; Jq .L:>x
public final static int SHELL = 4; 5+K;_)
public final static int QUICK = 5; :<GfETIs
public final static int IMPROVED_QUICK = 6; >vujZw_0>
public final static int MERGE = 7; q8sbn
public final static int IMPROVED_MERGE = 8; ,[`$JNc
public final static int HEAP = 9; *vnXlV4L
xmr|'}Pt[
public static void sort(int[] data) { p)3nyN=|_
sort(data, IMPROVED_QUICK); #mLuU
} ?2ItB`<(
private static String[] name={ ntGq" o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" })[($$f/
}; ]1sNmi$T
DZs^ 2Zc
private static Sort[] impl=new Sort[]{ i8~$o:&HT
new InsertSort(), c!Dc8=nE0m
new BubbleSort(), xU}M;4kH~
new SelectionSort(), 73 V"s
new ShellSort(), }Hy ~i
new QuickSort(), PZ,z15PG]
new ImprovedQuickSort(), >uy%-aXiVa
new MergeSort(), P`TIaP9%E
new ImprovedMergeSort(), +xj "hX>3
new HeapSort() -(IC~
}; {DBIonY];
>F3.c%VU]w
public static String toString(int algorithm){ J`oTes,
return name[algorithm-1]; }U[-44r:
} 9y^/GwUQ
6E|S
public static void sort(int[] data, int algorithm) { {QQl$ys/
impl[algorithm-1].sort(data); #$'FSy#
} Wx]d $_
|!LnAh
public static interface Sort { .Yx_:h=u
public void sort(int[] data); ZL_[4Y
} 6y Wc1
(oaYF+T
public static void swap(int[] data, int i, int j) { 6sB$<#
int temp = data; ,2`~ NPb
data = data[j]; H}nJbnU
data[j] = temp; HZZDv+
} nl n OwyMJ
} #w>~u2W