[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; 'zfj`aqc
} a>BPK"K2
int i1=l; rFG_CC2
int i2=mid+1; QK(w2`
for(int cur=l;cur<=r;cur++){ xcE<|0N :
if(i1==mid+1) @wx
data[cur]=temp[i2++]; Q<fDtf}
else if(i2>r) 05Y4=7,!
data[cur]=temp[i1++]; |&AZ95v
else if(temp[i1] data[cur]=temp[i1++]; 9"b =W@
else ^y<8&ZFH
data[cur]=temp[i2++]; 6"u"B-cz
} ,?`Zrxe[
} k/2TvEV3=
-=a,FDeR
} 0E/,l``p
^?-wov$
改进后的归并排序: %p8#pt\$7
w ;xbQZ|+
package org.rut.util.algorithm.support; m53~Ysq<
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import org.rut.util.algorithm.SortUtil; _REAzxeS
q?bKh*48
/** Z:Y_{YAD
* @author treeroot }MW+K&sIh
* @since 2006-2-2 7s}Eq~
* @version 1.0 GfL:0
*/ G?5Vj_n
public class ImprovedMergeSort implements SortUtil.Sort { NRDXWscb
sJ5Ws%q
private static final int THRESHOLD = 10; J6RzN'j
y.Y;<UGu
/* 3&KRG}5
* (non-Javadoc) Gq0`VHAn
* ]@hN&W(+x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b+e9Pi*\
*/ USJk *
public void sort(int[] data) { X@H/"B%u2
int[] temp=new int[data.length]; `tEW.s%Y(6
mergeSort(data,temp,0,data.length-1); 4O:y ?D/e
} F8d:7`lO@/
JNxrs~}
private void mergeSort(int[] data, int[] temp, int l, int r) { r Zg(%6@
int i, j, k; V[ 'lB.&t
int mid = (l + r) / 2; +CXtTasP
if (l == r) n+SHkrW
return; pRGag~h|E
if ((mid - l) >= THRESHOLD) sz+%4T
mergeSort(data, temp, l, mid); ANq3r(
else .r\|9 *j<
insertSort(data, l, mid - l + 1); /xw}]Fa5
if ((r - mid) > THRESHOLD) G:i>MJbxT
mergeSort(data, temp, mid + 1, r); nr- 32u
else AY_GD ^
insertSort(data, mid + 1, r - mid); /<T3^/ '
s&F& *5W
for (i = l; i <= mid; i++) { ';KWHk8C
temp = data; 84A:Rd'k3)
} 't3&,:Y
for (j = 1; j <= r - mid; j++) { I T?~`vi
temp[r - j + 1] = data[j + mid]; );=0cnr3
} s|!lw
int a = temp[l]; 1Ms_2
int b = temp[r]; 8M8Odz\3 q
for (i = l, j = r, k = l; k <= r; k++) { *IWWD\U
if (a < b) { 1w'W)x
data[k] = temp[i++]; 6\vaR#
a = temp; W=\45BJ
} else { T$*#q('1"}
data[k] = temp[j--]; 0t2n7Y?N
b = temp[j]; ^50\c$
} V2>+s y
} U%rq(`;
} H_FT%`iM
ob]j1gYb
/** UM:]QbaIn
* @param data tX~*.W:
* @param l <7_s'UAL!
* @param i ?ZP@H _w6}
*/ tui5?\
private void insertSort(int[] data, int start, int len) { Hd57Iw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qijQRxS
} ,Rdw]O
} !24PJ\~I
} /Csk"IfuO
} Nj=0bg"Qg5
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堆排序： /B)`pF.n
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package org.rut.util.algorithm.support; lx:.9>
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import org.rut.util.algorithm.SortUtil; Of m0{c=
I+W:}}"j
/** k|`Qk!tr
* @author treeroot wWQt
* @since 2006-2-2 Hq#q4Y
* @version 1.0 ]DjnzClx
*/ ~Z' /b|x<3
public class HeapSort implements SortUtil.Sort{ ~- eB
5Zn:$?7
/* (non-Javadoc) m{f+!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aRy" _dZ2
*/ ko~D;M:
public void sort(int[] data) { Egmp8:nZl@
MaxHeap h=new MaxHeap(); ^J'O8G$
h.init(data); %#TAz7
for(int i=0;i h.remove(); fLZ mQO
System.arraycopy(h.queue,1,data,0,data.length); & tjL*/
} 7ygz52
^~^=$fz
private static class MaxHeap{ h?p!uQ
Cs2kbG_
void init(int[] data){ lf#5X)V
this.queue=new int[data.length+1]; = OzpI
for(int i=0;i queue[++size]=data; r6vI6|1
fixUp(size); $bl<mG%#9
} -+[~eqRB
} >?[?W|k7V
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private int size=0; iLQ;`/j
l~mj>$
private int[] queue; Zi{vEI]
|f1RhB
public int get() { i?861Hu
return queue[1]; Ffig0K+`
} }kSP p
ndu$N$7+
public void remove() { b8**M'k
SortUtil.swap(queue,1,size--); 9SXpZ*Sx
fixDown(1); 3hcWR'|
} SB,#y>Zv?
file://fixdown ce:wF#Qs
private void fixDown(int k) { >Se-5QtLcf
int j; (t5vBUj
while ((j = k << 1) <= size) { EQ]>^VE2B
if (j < size %26amp;%26amp; queue[j] j++; j\iNag(
if (queue[k]>queue[j]) file://不用交换 W@RD bsc
break; Z-3("%_$/
SortUtil.swap(queue,j,k); +V;d^&S
k = j; }=A+W2D
} Hi^Z`97c
} rJ(AO'=
private void fixUp(int k) { Vi#[kn'
while (k > 1) { C!Jy;Z=+u
int j = k >> 1; \+"Jg/)ij
if (queue[j]>queue[k]) 5xQ5)B4k
break; WO$8j2!~#
SortUtil.swap(queue,j,k); 9<.8mW^68
k = j; ?}HZJ@:lB
} G"ixw
} 0-p %.}GE
5t|$Yt[
} LI>Bl
h{ZK;(u$
} r,q.RWuII
!LCy:>i!d
SortUtil： ,(f({l[J}
'p)DJUwt
package org.rut.util.algorithm; ~5>TMIDiuR
f|Nkk*9$
import org.rut.util.algorithm.support.BubbleSort; >M^:x-mib
import org.rut.util.algorithm.support.HeapSort; >sQf{uL
import org.rut.util.algorithm.support.ImprovedMergeSort; *ZIX76y<!A
import org.rut.util.algorithm.support.ImprovedQuickSort; iD/+#UTY
import org.rut.util.algorithm.support.InsertSort; |h6,.#n
import org.rut.util.algorithm.support.MergeSort; N{<5)L~Y
import org.rut.util.algorithm.support.QuickSort; !Wj`U$];
import org.rut.util.algorithm.support.SelectionSort; jOZ>^5}
import org.rut.util.algorithm.support.ShellSort; E85TCS1
hqV_MeHv'
/** @u`m6``T
* @author treeroot <pM6fI6BD
* @since 2006-2-2 :;\xyy}A
* @version 1.0 Gn4XVzB`O
*/ b>]UNf"-
public class SortUtil { tMXNi\Bj
public final static int INSERT = 1; ?;A\>sP
public final static int BUBBLE = 2; GK1P7Qy?V
public final static int SELECTION = 3; =i6k[rg
public final static int SHELL = 4; OS1f}<
public final static int QUICK = 5; _+Z5qUmQ
public final static int IMPROVED_QUICK = 6; !wC( ]Y
public final static int MERGE = 7; /T2 v`Li
public final static int IMPROVED_MERGE = 8; ^CD?SP"i
public final static int HEAP = 9; ^S 45!mSb
n8JM 0 U-
public static void sort(int[] data) { aSI%!Vg.
sort(data, IMPROVED_QUICK); i=&]%T6Qk
} ]Bs{9=2
private static String[] name={ FGeKhA 8jT
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" aGAr24]y
}; r.c:QY$
;p87^:
private static Sort[] impl=new Sort[]{ x6ayFq=
new InsertSort(), 5Q:%f
new BubbleSort(), ?)Je%H
new SelectionSort(), +pQ3bX
new ShellSort(), A)&CI6(
new QuickSort(), w|NId,#f
new ImprovedQuickSort(), 0QyL}y2
new MergeSort(), *;Cpz[N
new ImprovedMergeSort(), @z:E]O}
new HeapSort() L uW""P/
}; Ucz=\dO1
}PM7CZSq
public static String toString(int algorithm){ 40z1Qkmaey
return name[algorithm-1]; yCkX+{ki
} P6({wx
7~;)N$d\
public static void sort(int[] data, int algorithm) { ]@~%i=.7
impl[algorithm-1].sort(data); U }I#;*F
} "p+JME(
]f}(iD
public static interface Sort { xNa66A-8
public void sort(int[] data); qnqS^K,':
} Z$%!H7w
(W}DMcuSd
public static void swap(int[] data, int i, int j) { /SyAjZ
int temp = data; G<]@nP{P
data = data[j]; f8G<5_!K_
data[j] = temp; -9Ygn_M
} aj=-^iGG
} /1uGsE+[