[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; ^7J~W'hI
} BJ_+z gf`
int i1=l; Q|6Ls$'$
int i2=mid+1; EaJDz`T}
for(int cur=l;cur<=r;cur++){ ^n6)YX
if(i1==mid+1) 6yy|V~5
data[cur]=temp[i2++]; .ou!g&xu
else if(i2>r) 1y_fQ+\2A
data[cur]=temp[i1++]; O-y6!u$6&
else if(temp[i1] data[cur]=temp[i1++]; 0EcC
else (R9QBZP5
data[cur]=temp[i2++]; N`y}Gs
} NKupOJJq
} Q:'qw#P/C
Xp<A@2wt?
} j;$6F/g
Kx(76_XD
改进后的归并排序: d08`42Z69
^D%}V-"
package org.rut.util.algorithm.support; GhSL%y
m~Kch~~]
import org.rut.util.algorithm.SortUtil; [8B tIv
"#_)G7W+e
/** ;PuyA
* @author treeroot !$%/ rQ9
* @since 2006-2-2 JL}hOBqfI
* @version 1.0 `@VM<av
*/ 4*@G&v?n
public class ImprovedMergeSort implements SortUtil.Sort { b#?ai3E
$gj+v+%N
private static final int THRESHOLD = 10; f}Ne8]U/Hc
BLl%D
/* tdMP,0u
* (non-Javadoc) s0~05{
* I?^Q084
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q\\8b{~
*/ bQ|#_/?
public void sort(int[] data) { -D&.)N9ctQ
int[] temp=new int[data.length]; \]L::"![?
mergeSort(data,temp,0,data.length-1); 9^#zxmH)
} &;r'{$
-z>Z0viA
private void mergeSort(int[] data, int[] temp, int l, int r) { k"3Z@Px:
int i, j, k; oP43NN~
int mid = (l + r) / 2; PMz{8 F
if (l == r) XudH
return; ZTgAZ5_cz
if ((mid - l) >= THRESHOLD) $DABR
mergeSort(data, temp, l, mid); O]$*EiO\
else V8KTNt%
insertSort(data, l, mid - l + 1); O&rD4#
if ((r - mid) > THRESHOLD) kb>Vw<NtE
mergeSort(data, temp, mid + 1, r); kB$,1J$q
else o1p$9PL\:
insertSort(data, mid + 1, r - mid); ?:{0
yP<:iCY
for (i = l; i <= mid; i++) { OTNZ!U/)j
temp = data; X1 0"G~0
} LoV*YSDAY
for (j = 1; j <= r - mid; j++) { FJn~ =hA
temp[r - j + 1] = data[j + mid]; 4cErk)F4
} c|R3,<Q]
int a = temp[l]; N$ qNe'b
int b = temp[r]; n}ZBU5_
for (i = l, j = r, k = l; k <= r; k++) { \U<F\i
if (a < b) { EE{#S
data[k] = temp[i++]; Vx\#+)4
a = temp; NejsI un%
} else { DS[l,x
data[k] = temp[j--]; 9Ww=hfb5UW
b = temp[j]; D@lAT#vA
} 5w,YBUp
} Rrs`h `'-
} a?U%l9F
![X.%
/** KOAz-h@6
* @param data )z*$`?)k
* @param l LfjS[
* @param i WW8L~4Zy
*/ @$b+~X)7
private void insertSort(int[] data, int start, int len) { 4?*"7t3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 79c9+
} ,< )/45
} u%gm+NneK
} *"wD&E?
} L2/<+Zw
ru6HnLhL
堆排序： \3y=0
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package org.rut.util.algorithm.support; 1 [~|
\.{pZMM
import org.rut.util.algorithm.SortUtil; ]5)&36
|qudJucV
/** $Zu4tuXA
* @author treeroot L[[H&#\
* @since 2006-2-2 wHN`- 5%
* @version 1.0 !i"9f_
*/ Velbq
public class HeapSort implements SortUtil.Sort{ s$nfY.C
t&Y^W <
/* (non-Javadoc) dv4r\ R^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ][$$ =
*/ ]zM90$6
public void sort(int[] data) { "6Hjji@A
MaxHeap h=new MaxHeap(); n4d(`
h.init(data); dE9aE#o
for(int i=0;i h.remove(); \8>N<B)
System.arraycopy(h.queue,1,data,0,data.length); 3Ns:O2|
} ?[>BssW
)mo|.L0
private static class MaxHeap{ *}WqYqOow
dU04/]modD
void init(int[] data){ aid)q&AcQ
this.queue=new int[data.length+1]; T?}=k{C]
for(int i=0;i queue[++size]=data; $,@ rKRY
fixUp(size); 5bqYi
} ewff(e9
} fS$Yl~-m?
xyJgHbml
private int size=0; r'JK$9
I8pxo7(-
private int[] queue; BxN#Nk~
wCEfR!i
public int get() { 6V_5BpXt
return queue[1]; FVLA^$5c
} apWrcaj
w7ABnX
public void remove() { _q!ck0_
SortUtil.swap(queue,1,size--); 0PX@E-n
fixDown(1); "@<g'T0
} PT*@#:MA
file://fixdown ++RmaZ
private void fixDown(int k) { $/(/v?3][e
int j; sAAIyPJts
while ((j = k << 1) <= size) { kd2'-9
if (j < size %26amp;%26amp; queue[j] j++; "lj:bxM2C
if (queue[k]>queue[j]) file://不用交换 vH:+
break; C&K(({5O
SortUtil.swap(queue,j,k); K>p:?w
k = j; )t 7HioQ
} hdDI%3vk3
} I)4|?tb?
private void fixUp(int k) { 3G0\i!*t
while (k > 1) { RPqn#B
int j = k >> 1; t$ ~:C
if (queue[j]>queue[k]) o\YdL2:X
break; Yy:sZJ
SortUtil.swap(queue,j,k); j3'/jk]\
k = j; )$.9WlQ
} Jx[e{o)o
} 7.'j~hJL
\}&w/.T
} Xpz-@fqKdf
8k}CR)3@C
} !Dn1pjxc
6E%k{ r
SortUtil： {* _ W
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package org.rut.util.algorithm; g(/O)G.
[9Hm][|Ph
import org.rut.util.algorithm.support.BubbleSort; Zl/+HU~
import org.rut.util.algorithm.support.HeapSort; VH*(>^OfF
import org.rut.util.algorithm.support.ImprovedMergeSort; #3jZ7RqzQ
import org.rut.util.algorithm.support.ImprovedQuickSort; $w}aX0dK&
import org.rut.util.algorithm.support.InsertSort; e"09b<69
import org.rut.util.algorithm.support.MergeSort; fA,!d J
import org.rut.util.algorithm.support.QuickSort; ~oyPmIcb
import org.rut.util.algorithm.support.SelectionSort; c=mFYsSv
import org.rut.util.algorithm.support.ShellSort; ::t!W7W
qoq<dCt3
/** \3UdC{~
* @author treeroot Xc<9[@
* @since 2006-2-2 ;L{y3CWT
* @version 1.0 x?$Y<=vT
*/ g4932_tC
public class SortUtil { Wsz9X;
public final static int INSERT = 1; (bXp1*0 ;
public final static int BUBBLE = 2; ?["ZEa
public final static int SELECTION = 3; v<4X;4p^
public final static int SHELL = 4; X*;p;N
public final static int QUICK = 5; <AXYqH7%A
public final static int IMPROVED_QUICK = 6; g[Y$SgJ
public final static int MERGE = 7; cA^7}}?e
public final static int IMPROVED_MERGE = 8; p`ZGV97
public final static int HEAP = 9; /FXfu
3@A k6Uh
public static void sort(int[] data) { VdrF=V&] O
sort(data, IMPROVED_QUICK); 7m$/.\5
} "@Fxfd+Ot
private static String[] name={ [C#pMLp,~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }gt~{9?c
}; AY]nc#zz
>.A:6
private static Sort[] impl=new Sort[]{ kE|#mI[>
new InsertSort(), od|.E$B
new BubbleSort(), m/h0J03'T
new SelectionSort(), :H7 "W<
new ShellSort(), L*38T\
new QuickSort(), A`8If
new ImprovedQuickSort(), \/GY0s
new MergeSort(), IVKE dwA
new ImprovedMergeSort(), w, wt<@}
new HeapSort() h Nwb.[
}; vUNE!j
zAIC5fvu
public static String toString(int algorithm){ G 0 yt%qHE
return name[algorithm-1]; n40Z
} gr7_oJ:R
4j{ }{
public static void sort(int[] data, int algorithm) { woKdI)f$
impl[algorithm-1].sort(data); ^u74WN
} bL%)k61G_v
'%4,!
public static interface Sort { )$i3j 1[;
public void sort(int[] data); q\"$~*
} 2:yv:7t/
NI)nf;C
public static void swap(int[] data, int i, int j) { ];YOP%2
int temp = data; jTIn@Q
data = data[j]; cm<3'#~Q?
data[j] = temp; pcG q
} HmKE>C/
} xg&vZzcl