[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; -1W
} ?}sOG?{
int i1=l; o#e7,O
int i2=mid+1; grbTcLSF
for(int cur=l;cur<=r;cur++){ B>|5xpZM12
if(i1==mid+1) &;v!oe
data[cur]=temp[i2++]; ;BI)n]L
else if(i2>r) s*JE)
data[cur]=temp[i1++]; 3qo e^e
else if(temp[i1] data[cur]=temp[i1++]; o}~3JBnT
else yWHne~!
data[cur]=temp[i2++]; sXB+s
} V2Y$yV8g1
} >&hX&,hG
m2b`/JW
} w3bIb$12
u^=@DO'
改进后的归并排序: YMu)
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package org.rut.util.algorithm.support; },PBqWe
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import org.rut.util.algorithm.SortUtil; hTTfJDF
Hsl{rN
/** Z#7U "G-A
* @author treeroot F^rl$#pCS
* @since 2006-2-2 AgsR-"uh
* @version 1.0 W)-hU~^OM
*/ kfCKhx
public class ImprovedMergeSort implements SortUtil.Sort { wLMvC{5
bi,mM,N/
private static final int THRESHOLD = 10; Ab g$W/(|
W5/};K\.
/* evOb
* (non-Javadoc) 7@P656{
* h5!d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \)R-A '*U
*/ qLRE}$P
public void sort(int[] data) { |nm2Uy/0
int[] temp=new int[data.length]; D rTM$)
mergeSort(data,temp,0,data.length-1); c[{UI
} a: IwA9!L
%#9P?COs&W
private void mergeSort(int[] data, int[] temp, int l, int r) { .,mM%w,^O
int i, j, k; xjrlc9
int mid = (l + r) / 2; A& =pw#
if (l == r) stXda@y<p
return; q?iCc c
if ((mid - l) >= THRESHOLD) !4B_$6US
mergeSort(data, temp, l, mid); o2}N=|&
else xBWx+My
insertSort(data, l, mid - l + 1); i+AUQ0Zbf6
if ((r - mid) > THRESHOLD) [q$e6JwAt
mergeSort(data, temp, mid + 1, r); pqq?*\W&[v
else \HG$V>2
insertSort(data, mid + 1, r - mid); s##Ay{
]ymC3LV]
for (i = l; i <= mid; i++) { .K7C-Xn=
temp = data; 6Ahr_{
} /e<5Np\X
for (j = 1; j <= r - mid; j++) { 6 [ _fD
temp[r - j + 1] = data[j + mid]; Ilef+V^qr
} p`p?li
int a = temp[l]; CWvlr nv
int b = temp[r]; n?Zf/T
for (i = l, j = r, k = l; k <= r; k++) { Y)OBTX
if (a < b) { gvo?([j-m
data[k] = temp[i++]; _n_sfT6)B
a = temp; |."G?*
} else { h0XH`v
data[k] = temp[j--]; Bb_Q_<DTs
b = temp[j]; LP?P=c
} m&cvU>lC
} $WClpvVj
} -t>Z 9
M8_R
/** R8uj3!3^
* @param data 9A<0zt
* @param l mt^`1ekoY
* @param i \!4|tBKVY
*/ ,-:a?#f>
private void insertSort(int[] data, int start, int len) { P57GqT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); m9Il\PoTq
} -p^'XL*Z
} ?OO%5PSen
} ^Po,(iIn
} )-#i8?y3C
N"~ qoJO
堆排序： b-uZ"Kf^
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package org.rut.util.algorithm.support; U1kh-8 :
NQ{-&#@/v
import org.rut.util.algorithm.SortUtil; ^(g_.>
CPGL!:
/** Z+,CL/
* @author treeroot \*J.\f
* @since 2006-2-2 g@(4ujOT
* @version 1.0 ZR6&AiL(Bj
*/ Qpw@MF2P
public class HeapSort implements SortUtil.Sort{ 22'vm~2E
&L'6KEahR
/* (non-Javadoc) 6Wb!J>93
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _[%n ~6
*/ nUqL\(UuY
public void sort(int[] data) { ]Y=S
MaxHeap h=new MaxHeap(); <b'1#Pd>0
h.init(data); (QKsB3X
for(int i=0;i h.remove(); {RJ52Gx(
System.arraycopy(h.queue,1,data,0,data.length); }v&K~!*
} ( mt*y]p?
)WclV~
private static class MaxHeap{ yeNvQG
GqMB^Ad
void init(int[] data){ L^x5&CCwk
this.queue=new int[data.length+1]; FXxN>\76.
for(int i=0;i queue[++size]=data; UtPwWB_YV
fixUp(size); L, #Byao
} S<9gyW
} hWm0$v1p
$i -zMa
private int size=0; EFD?di)s
_}^u-fJ/~
private int[] queue; 3jS7 uU
$-e=tWkgv
public int get() { ~9bv Wd1D
return queue[1]; 2=O))^8
} {F/q{c~]
E;$$+rA
public void remove() { ]y}Zi/zh
SortUtil.swap(queue,1,size--); 9LHa&""
fixDown(1); r;$r=Ufr
} /0-\ek ye
file://fixdown eq{ [?/
private void fixDown(int k) { )u-ns5
int j; py=i!vb&Z%
while ((j = k << 1) <= size) { xmOM<0T
if (j < size %26amp;%26amp; queue[j] j++; 1j+eD:d'
if (queue[k]>queue[j]) file://不用交换 C&e8a9*,(a
break; ?o8a_9+
SortUtil.swap(queue,j,k); 3+j^E6@
k = j; c|+y9(0|y
} *s~i 2}
} kM,@[V
private void fixUp(int k) { 4':MI|/my_
while (k > 1) { DgVyy&7>
int j = k >> 1; k}#@8n|b
if (queue[j]>queue[k]) N7a[B>+`
break; >6w@{p2B
SortUtil.swap(queue,j,k); Y1|^>C#a
k = j; i"vDRrDe
} YT][\x
} +hZ] B<$
:)j7U3u
} |K6nOX!i
qR_SQ VN
} o16d`}/<
T:Bzz)2/
SortUtil： KoFv0~8Q
? 1GJa]G
package org.rut.util.algorithm; TX&[;jsj
~6] )*y
import org.rut.util.algorithm.support.BubbleSort; =?^-P{:\?
import org.rut.util.algorithm.support.HeapSort; ,Io0ZE>`V
import org.rut.util.algorithm.support.ImprovedMergeSort; NWeV>;lh9
import org.rut.util.algorithm.support.ImprovedQuickSort; 5%'o%`?i
import org.rut.util.algorithm.support.InsertSort; Nz}|%.GP"
import org.rut.util.algorithm.support.MergeSort; w{~" ;[@
import org.rut.util.algorithm.support.QuickSort; 80dSQ"y
import org.rut.util.algorithm.support.SelectionSort; tD865gi
import org.rut.util.algorithm.support.ShellSort; N=.}h\{0
>}mNi:6xq
/** dWMccn;-m
* @author treeroot 3F;EE:
* @since 2006-2-2 [1e.i
* @version 1.0 $x/J+9Ww
*/ xNn>+J
public class SortUtil { gNG.l
public final static int INSERT = 1; 9GtLMpy
public final static int BUBBLE = 2; makaI0M
public final static int SELECTION = 3; U-ERhm>uk
public final static int SHELL = 4; kja4!_d
public final static int QUICK = 5; 6V+V zDo
public final static int IMPROVED_QUICK = 6; =P1RdyP
public final static int MERGE = 7; ShsJ_/C2
public final static int IMPROVED_MERGE = 8; }F~f&<GX6
public final static int HEAP = 9; i[mC3ghM6,
\A` gK\/h
public static void sort(int[] data) { :{x!g6bK@
sort(data, IMPROVED_QUICK); kBQ5]Q"
} C+DG+_%V*S
private static String[] name={ dvC0 <*V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ex{)mE4Cd
}; Fka1]|j9
k>7gy?Y!K<
private static Sort[] impl=new Sort[]{ u}^a^B$
new InsertSort(), llHN2R%(
new BubbleSort(), S_a :ML<
new SelectionSort(), 8moUK3w
new ShellSort(), ?0? x+
new QuickSort(), l# }As.o}
new ImprovedQuickSort(), :PHUsy
new MergeSort(), 4F}g(
new ImprovedMergeSort(), zw}@nqp
new HeapSort() %g!yccD9
}; ^- u[q- !
5`(((_Um+
public static String toString(int algorithm){ Uf=vs(
return name[algorithm-1]; 3| GNi~
} ,w,ENU0~f
:y4)qF
public static void sort(int[] data, int algorithm) { <)r,CiS
impl[algorithm-1].sort(data); =ZxW8DK
} VFQq`!*i
EI[e+@J
public static interface Sort { xgZV0!%
public void sort(int[] data); Gw{Gt]liq
} b #o}=m
le "JW/BD
public static void swap(int[] data, int i, int j) { &*Q|d*CP
int temp = data; rhlW
data = data[j]; 8<wtf]x
data[j] = temp; Z'7 c^c7_
} 9O(i+fM
} g(ZeFOn