[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; +=@^i'
} EYzg%\HH
int i1=l; 'VnwG
int i2=mid+1; 3x*z\VJ
for(int cur=l;cur<=r;cur++){ -e-e9uP
if(i1==mid+1) <>&=n+i
data[cur]=temp[i2++]; y2Bh?>pg
else if(i2>r) qk{'!Ii
data[cur]=temp[i1++]; h BMH)aU
else if(temp[i1] data[cur]=temp[i1++]; '?Bg;Z'L%
else a' FN 3
data[cur]=temp[i2++]; `^F: -
} /I{R23o
} 7qIB7_K5
ETw]! br
} 8v_C5d\
:-+4:S
改进后的归并排序: 0&w0aP`Y
7} O;FX+x
package org.rut.util.algorithm.support; zQ)+/e(8
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import org.rut.util.algorithm.SortUtil; gT52G?-
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/** [Eq<":)
* @author treeroot 'imU`zeo
* @since 2006-2-2 tai Vk4
* @version 1.0 F1W+o?B
*/ /XpSe<3
public class ImprovedMergeSort implements SortUtil.Sort { :h5J r8
n'w,n1z7
private static final int THRESHOLD = 10; nYw\'c
/'&;Q7!)
/* G?)vWM`j
* (non-Javadoc) ;Rnhe_A.
* N+Sq}hI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s@@1 *VQ
*/ Z5)eREi=
public void sort(int[] data) { $[CA&Y.
int[] temp=new int[data.length]; ,@CfVQz
mergeSort(data,temp,0,data.length-1); d0UZ+ RR#
} KCqqJ}G
HtBF=Boq
private void mergeSort(int[] data, int[] temp, int l, int r) { iD_TP
int i, j, k; i57( $1.
int mid = (l + r) / 2; 4<gJ2a3
if (l == r) %v=!'?VT
return; ,)#.a%EKA
if ((mid - l) >= THRESHOLD) otriif@+Z
mergeSort(data, temp, l, mid); x-Z^Q C
else aj7dH5SZl
insertSort(data, l, mid - l + 1); ~<O,Vs_C/
if ((r - mid) > THRESHOLD) 'EX4.h a5
mergeSort(data, temp, mid + 1, r); A~71i&
else W<'<'z5
insertSort(data, mid + 1, r - mid); 7'j9rmTXs
IC~ljy]y_
for (i = l; i <= mid; i++) { O%$O(l
temp = data; Q"}s>]k3_
} &HF]\`RNr
for (j = 1; j <= r - mid; j++) { L|67f4
temp[r - j + 1] = data[j + mid]; /bcY6b=:
} a@W7<9fY;
int a = temp[l]; SMO*({/
int b = temp[r]; #5{sglC"|F
for (i = l, j = r, k = l; k <= r; k++) { ntHT
if (a < b) { "$@,n7k
data[k] = temp[i++]; 'lQYJ0
a = temp; I'A:J
} else { bXvbddu)}
data[k] = temp[j--]; Bl4 dhBZoO
b = temp[j]; P(_(w 9
} qZsnd7o{l.
} Phlk1*1n
} 1n3$V:00
Wem?{kx0
/** Xw(3j)xQ
* @param data IwRQL%
* @param l 4*8&[b
* @param i B9W/bJ6%
*/ %UG/ak%z
private void insertSort(int[] data, int start, int len) { A$m<@%Sz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 04\Ta
} 5"2@NL
} FV8\+ep
} T{HfP
} gMay
p">WK<N
堆排序： _LsYMUe
ULu O0\W
package org.rut.util.algorithm.support; .+uVgSN
.f%vDBJS
import org.rut.util.algorithm.SortUtil; ]ut?&&*
l#ygb|=x
/** Ou!)1UFI
* @author treeroot `skH-lk,
* @since 2006-2-2 &<t79d%{
* @version 1.0 I1v@\Rb
*/ !ABLd|tP
public class HeapSort implements SortUtil.Sort{ GZ,j?@
]!-R<[b 6
/* (non-Javadoc) )BpIxWd?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e sGlMq
*/ x{j+}'9
public void sort(int[] data) { iz(m3k:w
MaxHeap h=new MaxHeap(); m&ZJqsZIL
h.init(data); CQjV!d0j
for(int i=0;i h.remove(); Tz2x9b\82
System.arraycopy(h.queue,1,data,0,data.length); lXw;|dGF
} &gJW6<
rNxG0^k(
private static class MaxHeap{ d4V 2[TX
IY~ {)X
void init(int[] data){ fGG 9zB6
this.queue=new int[data.length+1]; % dYI5U89
for(int i=0;i queue[++size]=data; v$Dh.y
fixUp(size); \Qp}|n1JY
} [e1\A&T
} 35}P0+
|<'10
private int size=0; _3I3AG0e
[(!Q-8
private int[] queue; %{Xm5#m
?'T"?b<
public int get() { 83B\+]{hD
return queue[1]; $=7H1 w
} #%qqL
V02309Y
public void remove() { 1RmBtx\<
SortUtil.swap(queue,1,size--); p-a]"l+L
fixDown(1); i4 P$wlO
} @f-0X1C."N
file://fixdown #T Z!#,q
private void fixDown(int k) { N4' .a=1
int j; p$B)^S%0i
while ((j = k << 1) <= size) { d"z*Nb
if (j < size %26amp;%26amp; queue[j] j++; W&Y4Dq^
if (queue[k]>queue[j]) file://不用交换 ZV0) ."^Z
break; _Wq7U1v`
SortUtil.swap(queue,j,k); n})
k = j; kVy"+ZebK
} (69kvA&|q
} _P>1`IR
private void fixUp(int k) { 6ch@Be5*
while (k > 1) { KwY`<t1lA;
int j = k >> 1; <?{ SU
if (queue[j]>queue[k]) mI2|0RWI)l
break; RJQ/y3
SortUtil.swap(queue,j,k); Kw)C{L5a
k = j; D-;J;m \
} c"6Kd$?M
} $[WN[J
cKaL K#~
} 4X<Oux*
N;%j#(v j
} ,oy4V^B&
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SortUtil： B(HNB\3u
PGC07U:B
package org.rut.util.algorithm; 3 ATN?V@
{6REfY c
import org.rut.util.algorithm.support.BubbleSort; vbW\~xf
import org.rut.util.algorithm.support.HeapSort; +:j4G^V
import org.rut.util.algorithm.support.ImprovedMergeSort; Ly@U\%.
import org.rut.util.algorithm.support.ImprovedQuickSort; pmE1EDPag
import org.rut.util.algorithm.support.InsertSort; 8Xt=eL/P
import org.rut.util.algorithm.support.MergeSort; h+\$Z]
import org.rut.util.algorithm.support.QuickSort; hg)!m\g
import org.rut.util.algorithm.support.SelectionSort; H{p[Ghp
import org.rut.util.algorithm.support.ShellSort; Zb5T90s%
BN bb&]
/** X7(rg W8
* @author treeroot rElG7[+)p
* @since 2006-2-2 )AZ`R8-A
* @version 1.0 B{=,VwaP_
*/ #)IdJ]
public class SortUtil { 4c493QOd
public final static int INSERT = 1; 2b vYF;<r
public final static int BUBBLE = 2; 6"#Tvj~-8
public final static int SELECTION = 3; ^;v.ytO*
public final static int SHELL = 4; PDa06(t7
public final static int QUICK = 5; J{v6DYhi
public final static int IMPROVED_QUICK = 6; 7ipY*DT8
public final static int MERGE = 7; c{r6a=C
public final static int IMPROVED_MERGE = 8; -F~9f>
public final static int HEAP = 9; B%?|br
V3.vE,
public static void sort(int[] data) { OmQuAG ^\x
sort(data, IMPROVED_QUICK); lVO(9sl*i
} *HfW(C$
private static String[] name={ *AJezhR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "1\RdTw
}; 6 I>xd
s2 t-T0;
private static Sort[] impl=new Sort[]{ 3vEjf
new InsertSort(), !3gpiQH{
new BubbleSort(), knj,[7uh
new SelectionSort(), Ix l"'Q_z
new ShellSort(), n$Oky-P"
new QuickSort(), =&<$I
new ImprovedQuickSort(), :D)&>{?
new MergeSort(), D6@4
new ImprovedMergeSort(), +BTNm66Z
new HeapSort() 4h0jX9
}; ztt%l #
q=L* 99S
public static String toString(int algorithm){ LKwUpu!
return name[algorithm-1]; Tef3 Z6
} NU6Kh7
Y+5A2Z)f[
public static void sort(int[] data, int algorithm) { kA9 X!)2w
impl[algorithm-1].sort(data); z]R!l%`
} [Z`:1_^0}
5 <>agK]
public static interface Sort { @=| b$E
public void sort(int[] data); s9Q)6=mE
} fgz'C?
jn3|9x
public static void swap(int[] data, int i, int j) { "/]tFY%Y
int temp = data; jH#^O;A
data = data[j]; )*AA9
data[j] = temp; {UVm0AeUq
} oVZ8p-
} JV*,!5