[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; @KM?agtlbl
} f I%8@ :
int i1=l; GJWGT`"
int i2=mid+1; 0:Bpvl5
for(int cur=l;cur<=r;cur++){ %<^^ Mw
if(i1==mid+1) bGwOhd<.
data[cur]=temp[i2++]; BvvjaC
else if(i2>r) TFOx=_.%i
data[cur]=temp[i1++]; Wu6'm&t
else if(temp[i1] data[cur]=temp[i1++]; Lv@WI6DM
else Z'A 3\f
data[cur]=temp[i2++]; qMEd R;o
} 0to`=;JI
} </'n={+q
V]Te_ >E;w
} J#Q>dC7
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改进后的归并排序: <cZ/_+H%C
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package org.rut.util.algorithm.support; ?<F([(
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import org.rut.util.algorithm.SortUtil; 7#wB
yT:2*sZRc
/** WZ`i\s1#
* @author treeroot gaC4u,Zb
* @since 2006-2-2 R1SFMI
* @version 1.0 n;Mk\*Cg
*/ Zrwd
public class ImprovedMergeSort implements SortUtil.Sort { y_>DszRN`u
'C}ku>B_r
private static final int THRESHOLD = 10; -'O|D}
\A^8KVE!
/* (Zx--2lc
* (non-Javadoc) q~#>MB}".
* _N:$|O#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '+Jy//5?
*/ v5@4|u3ds
public void sort(int[] data) { 0Sk~m4fj(
int[] temp=new int[data.length]; w;Azxcw
mergeSort(data,temp,0,data.length-1); %AJ9fs4/
} XzIC~}
MtwlZg`c3
private void mergeSort(int[] data, int[] temp, int l, int r) { :@5{*o
int i, j, k; =^p}JhQ
int mid = (l + r) / 2; 9BP'[SM%),
if (l == r) gJp6ReZ#
return; O`Qke Z}
if ((mid - l) >= THRESHOLD) T*@o?U
mergeSort(data, temp, l, mid); J0vQqTaT
else P(yLRc
insertSort(data, l, mid - l + 1); Wgs6}1bg
if ((r - mid) > THRESHOLD) sMAj?]hI$
mergeSort(data, temp, mid + 1, r); Q_p&~PNy5
else ELV~ ayp5
insertSort(data, mid + 1, r - mid); I++ Le%w
fJ\?+,
for (i = l; i <= mid; i++) { ] 7[#K^
temp = data; *.eeiSi{
} E$z-|-{>
for (j = 1; j <= r - mid; j++) { J<H]vs
temp[r - j + 1] = data[j + mid]; :~Ra}
} Pc&dU1
int a = temp[l]; ,<!*@xy7v
int b = temp[r]; `%~}p7Zu
for (i = l, j = r, k = l; k <= r; k++) { z9&j
if (a < b) { Ax\d{0/oL2
data[k] = temp[i++]; _\yR/W~
a = temp; l z"o( %D
} else { %CYo, e
data[k] = temp[j--]; %}H 2
b = temp[j]; 6:S, {@G
} MCTJ^g"D
} G6{'|CV
} ";`jS&"=
\IC^z
/** &Jb$YKt
* @param data '/XP4B\(E
* @param l .|u`s,\
* @param i ,[ppETz
*/ UAz^P6iQ`~
private void insertSort(int[] data, int start, int len) { \VEnP=*:W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9W(&g)`
} \>*.+?97
} |J`v w
} ~9APc{"A
} jP/Vqe%%8
;=IJHk1&
堆排序： <sm"3qs"_
vO$cF*
package org.rut.util.algorithm.support; ` ;mQ"lO
#hn
import org.rut.util.algorithm.SortUtil; R+ \%
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/** K"t?
* @author treeroot yKrbGK*=_
* @since 2006-2-2 BI%~0Gj8
* @version 1.0 -1B.A
*/ 6ERMn"[_w
public class HeapSort implements SortUtil.Sort{ #wT6IU1
9[X'9*,
/* (non-Javadoc) .czUJyFms}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2<OU)rVE4
*/ -z. wAp
public void sort(int[] data) { CV^%'HIs?+
MaxHeap h=new MaxHeap(); +1yi{!j1
h.init(data); L?;UcCB
for(int i=0;i h.remove(); Kyk{:UnI
System.arraycopy(h.queue,1,data,0,data.length); :4 z\Q]
} 3QZm *. /"
OAiW8BAe
private static class MaxHeap{ (y?F8]TfM
_kRc"MaB
void init(int[] data){ a;KdkykG
this.queue=new int[data.length+1]; JW><&hY$"
for(int i=0;i queue[++size]=data; oLR/\Y(
fixUp(size); 2V%z=
} &d6ud|
} c\>I0HH;!
Z2g<"M
private int size=0; {Mb<onW
ng|^Zm%
private int[] queue; u/|@iWK:
?5ZvvAi
public int get() { 1}c/l<d
return queue[1]; QPLWRZu@
} PN9vg9'
>Q(\vl@N=
public void remove() { 2brY\c F
SortUtil.swap(queue,1,size--); @}Ry7H0O
fixDown(1); Sn'!Nq>
} VFF5Tp
file://fixdown >Ho=L)u
private void fixDown(int k) { =AzkE]
int j; uSI@Cjp
while ((j = k << 1) <= size) { 03|nP$g
if (j < size %26amp;%26amp; queue[j] j++; 3SbZD
if (queue[k]>queue[j]) file://不用交换 ,)d`_AD+5
break; 3}phg
SortUtil.swap(queue,j,k); !D{z. KO
k = j; eJ<P
} SfPQ;s'
} [R8BcO(
private void fixUp(int k) { Ca?w"m~h
while (k > 1) { h"8[1 ;
int j = k >> 1; D2D+S
if (queue[j]>queue[k]) /<[_V/g[t?
break; !F~1+V>zP
SortUtil.swap(queue,j,k); &-^*D%9
k = j; O\o@]
} [bo"!Qk%
} YZOwr72VL
Ufi#y<dP
} Z|UVH
3;}YW^oXq
} u:(=gj,~x
xo @|;Z>&F
SortUtil： 3HP { a
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package org.rut.util.algorithm; S3U]AH)C
xA:;wV
import org.rut.util.algorithm.support.BubbleSort; ph(LsPT-
import org.rut.util.algorithm.support.HeapSort; x%@M*4:&
import org.rut.util.algorithm.support.ImprovedMergeSort; _O87[F1
import org.rut.util.algorithm.support.ImprovedQuickSort; B3[X{n$px
import org.rut.util.algorithm.support.InsertSort; ] X]!xvN@
import org.rut.util.algorithm.support.MergeSort; hV`?, ~K
import org.rut.util.algorithm.support.QuickSort; 'CqAjlj
import org.rut.util.algorithm.support.SelectionSort; =M@)qy
import org.rut.util.algorithm.support.ShellSort; BOvJEs!UX
Jr2>D=
/** !7#*Wdt+P
* @author treeroot p*cyW l
* @since 2006-2-2 Z9% u,Cb
* @version 1.0 t,XbF
*/ E)I&? <g
public class SortUtil { V5h_uGOD
public final static int INSERT = 1; ]+qd|}^
public final static int BUBBLE = 2; :|I"Em3R
public final static int SELECTION = 3; x3Fn'+
public final static int SHELL = 4; %O(W;O
public final static int QUICK = 5; v/]xdP^Z
public final static int IMPROVED_QUICK = 6; +ZE"pA^C
public final static int MERGE = 7; &V&beq4)p
public final static int IMPROVED_MERGE = 8; 9 s2z=^
public final static int HEAP = 9; {~EsO1p
=.m/X>
public static void sort(int[] data) { n~w[ajC/
sort(data, IMPROVED_QUICK); (l2n%LL]*
} UiK)m:NU
private static String[] name={ 8r,0Qic2K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +W[{UC4b
}; 0_^3 |n
<7ag=IgDy
private static Sort[] impl=new Sort[]{ LG("<CU
new InsertSort(), vPy."/[u
new BubbleSort(), yMgS0
new SelectionSort(), #f=41d%
new ShellSort(), 0!:%Ge_
new QuickSort(), 9dp4&&Z+F
new ImprovedQuickSort(), 4|eI_u{_
new MergeSort(), @Y9tkJIt
new ImprovedMergeSort(), sC :.}6
new HeapSort() BH$hd|KD<
}; 2'ws@U}lR
vBY?3p,0p
public static String toString(int algorithm){ [-)BI|S:
return name[algorithm-1]; !.|A}8nK
} &y3;`A7,
2XjH1
public static void sort(int[] data, int algorithm) { g</Mk^CE
impl[algorithm-1].sort(data); `,c~M
} ?*QL;[n1
lb}:!Y
public static interface Sort { gPpk0LZi
public void sort(int[] data); Ivq|-LDNc
} BUBtK-n~"3
"@xL9[d
public static void swap(int[] data, int i, int j) { 4%jQHOZ
int temp = data; d&DQ8Gm ^
data = data[j]; w(odgD
data[j] = temp; Oj7).U0;#
} 8(-N;<Ef2
} AD'c#CT