[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; D<Z]kR(
} #8a k=lL
int i1=l; -@mcu{&
int i2=mid+1; G,,f' >
for(int cur=l;cur<=r;cur++){ 3u1\zse
if(i1==mid+1) \&^U9=uq
data[cur]=temp[i2++]; ~p\r( B7G
else if(i2>r) +Al*MusS
data[cur]=temp[i1++]; y6gaoj
else if(temp[i1] data[cur]=temp[i1++]; U/>l>J5
else W%<z|
data[cur]=temp[i2++]; x{$/|_
} ffem7eQ
} [g$IN/o%
BYb"[qPV
} J''lOj(@
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改进后的归并排序: 7$Pf
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package org.rut.util.algorithm.support; He}"e&K
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import org.rut.util.algorithm.SortUtil; .}iRe}=
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/** >xIb|Yp)&
* @author treeroot *:Y9&s^6j
* @since 2006-2-2 256V xn
* @version 1.0 8l>YpS*S^
*/ /O[Z
public class ImprovedMergeSort implements SortUtil.Sort { q 7hoI]
uUh6/=y
private static final int THRESHOLD = 10; So}pA2[0
$~'G<YYF4
/* Ej$oRo{IG
* (non-Javadoc) ^ARkjYt
* @{@)gE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cs)R8vuB)z
*/ OZ2faf
public void sort(int[] data) { 6Q}>=R^h
int[] temp=new int[data.length]; 921s'"
mergeSort(data,temp,0,data.length-1); gyOAvx
} }C5Fvy6uz
ez[$;>
private void mergeSort(int[] data, int[] temp, int l, int r) { |5\: E}1
int i, j, k; *):s**BJ$
int mid = (l + r) / 2; )C$1))
if (l == r) MO *7:hI
return; @g1T??h
if ((mid - l) >= THRESHOLD) kf_*=ER
mergeSort(data, temp, l, mid); iy|xF~
else =+"-8tz8FV
insertSort(data, l, mid - l + 1); `i6q\-12n
if ((r - mid) > THRESHOLD) 7E R!>l+
mergeSort(data, temp, mid + 1, r); j.KV:zJU
else ^[1Xl7)`
insertSort(data, mid + 1, r - mid); r9~IR
z=qxZuFkDs
for (i = l; i <= mid; i++) { rz5@E
temp = data; PH=O>a`a_O
} JgcMk]|'
for (j = 1; j <= r - mid; j++) { c)SQ@B@q
temp[r - j + 1] = data[j + mid]; Q,R|VI6Co
} M&0U@ r-
int a = temp[l]; [m9=e-KS$Q
int b = temp[r]; /B5rWJ2AS
for (i = l, j = r, k = l; k <= r; k++) { +l>X Z
if (a < b) { Q8NrbMrl
data[k] = temp[i++]; gX/?
a = temp; py9`q7F
} else { >&)|fV&4
data[k] = temp[j--]; 7lG,.W|
b = temp[j]; z<8WN[fB
} 6V-JyTcxGI
} j +Ro?
} 3+V.9TL'a
UZu.B!4
/** .wkW<F7
* @param data p}q]GJ
* @param l vJuL+'[i
* @param i - 4B&{P
*/ h]k1vp)Q y
private void insertSort(int[] data, int start, int len) { ^6 \@$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y1Y
} v8K4u)
} NeniQeR
} }Hb_8P
} sb</-']a
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堆排序： H@`lM~T[
ePTN^#|W
package org.rut.util.algorithm.support; ]u"x=S93
yH.Z%*=xQa
import org.rut.util.algorithm.SortUtil; w,zm!
&H?VlxIx
/** )h/Qxf
* @author treeroot P(i E"KH;
* @since 2006-2-2 (+;%zh-
* @version 1.0 EP8R[Q0_"
*/ W! GUA<
public class HeapSort implements SortUtil.Sort{ Fj1'z5$
R3E|seR
/* (non-Javadoc) +$B#] ,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $GIup5
*/ 1K[y)q
public void sort(int[] data) { -7A2@g
MaxHeap h=new MaxHeap(); laaoIL^
h.init(data); &dJ\}O[r
for(int i=0;i h.remove(); l1]'3]P(
System.arraycopy(h.queue,1,data,0,data.length); n;~6'fxe
} ~{[,0,lWU
:bz;_DZP
private static class MaxHeap{ BzI(
Klqte*!
void init(int[] data){ %(g!,!l)
this.queue=new int[data.length+1]; zCSLV>.F
for(int i=0;i queue[++size]=data; @;>Xy!G
fixUp(size); gdG#;T'
} >;k~B
} q #X[oVq
\"$jj<gc
private int size=0; .<-~k@ P
x$6FvgP(
private int[] queue; cDh\$7'b
J24H}^~na
public int get() { wyv%c/WlS
return queue[1]; ]}nX$xy
} /4,U@s)"/
:A`jRe.
public void remove() { }Z% j=c"d
SortUtil.swap(queue,1,size--); Q@.%^1Mp
fixDown(1); >TS=tK
} |=EwZmj-c
file://fixdown 1Ewg_/R
private void fixDown(int k) { ~}s0~j~
int j; B{lL}"++0
while ((j = k << 1) <= size) { (t"rzH
if (j < size %26amp;%26amp; queue[j] j++; wy?Hp*E
if (queue[k]>queue[j]) file://不用交换 @gihIysf
break; (:|1h@K/R
SortUtil.swap(queue,j,k); "oT]_WHqo
k = j; lsB.>NlU
} PF:E{_~
} :6}cczQE|O
private void fixUp(int k) { 'd9cCQ}
while (k > 1) { dx"9jFn
int j = k >> 1; p&3~n: Fo
if (queue[j]>queue[k]) "Kf4v|6;
break; Q&?B^[N*Q
SortUtil.swap(queue,j,k); GlaZZ,
k = j; #oEq)Vq>g|
} (eO_]<wmky
} q4ej7T8
@{x+ln1r
} e[t1V/ah
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} z. xRJ
vjYG>YhV
SortUtil： 8rSu,&<
d4A3DTW
package org.rut.util.algorithm; |p":s3K"Hy
]d,#PF
import org.rut.util.algorithm.support.BubbleSort; ( ALsc@K
import org.rut.util.algorithm.support.HeapSort; d$v{oC}
import org.rut.util.algorithm.support.ImprovedMergeSort; Bt"*a=t;
import org.rut.util.algorithm.support.ImprovedQuickSort; ]`eJSk.
import org.rut.util.algorithm.support.InsertSort; |sV@j_TX
import org.rut.util.algorithm.support.MergeSort; juBzpQYj
import org.rut.util.algorithm.support.QuickSort; x DX_s:A
import org.rut.util.algorithm.support.SelectionSort; R5'_il
import org.rut.util.algorithm.support.ShellSort; k1M?6TW&
4I3)eS%2
/** R|dSjEs
* @author treeroot S-G#+Ue2
* @since 2006-2-2 mNr<=Z%b
* @version 1.0 t[x[X4
*/ 8Nxyc>8K~
public class SortUtil { jp+#N pH
public final static int INSERT = 1; <^B!.zQ
public final static int BUBBLE = 2; LZrkFkiC
public final static int SELECTION = 3; rYk
public final static int SHELL = 4; uCGn9]
public final static int QUICK = 5; 0/?=FM>
public final static int IMPROVED_QUICK = 6; k{pn~)xg
public final static int MERGE = 7; {m5R=22^
public final static int IMPROVED_MERGE = 8; LX iis)1
public final static int HEAP = 9; ? p^':@=
KPs @v@5M
public static void sort(int[] data) { )\,hc$<=m
sort(data, IMPROVED_QUICK); d,%@*v]S
} S3_QOL
private static String[] name={ =!PUKa3f<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5b%zpx0Y
}; \}NZ]l
DqlspT
private static Sort[] impl=new Sort[]{ yy$7{9!
new InsertSort(), *(]@T@yN
new BubbleSort(), wvg>SfV,e
new SelectionSort(), d)jX%Z$LC
new ShellSort(), o$bD?Zn
new QuickSort(), dG'5: ,n/
new ImprovedQuickSort(), C$fQ[@
new MergeSort(), j=TG&#e
new ImprovedMergeSort(), XX'Rv]T
new HeapSort() KiG/XnS
}; [[d@P%X&
qVmG"et'J
public static String toString(int algorithm){ iC\t@BVS
return name[algorithm-1]; &|) (lX
} WJ(E3bb
Vr%!rQ
public static void sort(int[] data, int algorithm) { ]e]l08
impl[algorithm-1].sort(data); Y([vma>U]
} ];G$~[
0i65.4sK
public static interface Sort { OPwO`pN
public void sort(int[] data); Oz_|pu
} |&a[@(N:zf
^)|1T#Tz
public static void swap(int[] data, int i, int j) { "M5&&\uT
int temp = data; Og3bV_,"
data = data[j]; (_O_zu8_
data[j] = temp; 9:jZ3U
} cE0Kvqe`
} Ok2>%e