[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; ,yV pB)IQ
} oYJ&BPuA'
int i1=l; EF"ar
int i2=mid+1; T?AGQcG
for(int cur=l;cur<=r;cur++){ Y1`.
if(i1==mid+1) s$H5W`3
data[cur]=temp[i2++]; ;lYO)Z`3\
else if(i2>r) }s}9@kl;&
data[cur]=temp[i1++]; &CUkR6
else if(temp[i1] data[cur]=temp[i1++]; >x2T'
else 8^dGI9N
data[cur]=temp[i2++]; L'aMXNO
} $ZcmE<7k
} ^jf$V#z0/
}-r"W7]k
} D|e6$O5o
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改进后的归并排序: AQQj]7Y
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package org.rut.util.algorithm.support; sv0kksj
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import org.rut.util.algorithm.SortUtil; cLR8U1k'
Ae ue:u>
/** M\`6H8aLn
* @author treeroot #:s'&.6
* @since 2006-2-2 &RROra
* @version 1.0 TUpEhQ+*
*/ D"^ogY#LK
public class ImprovedMergeSort implements SortUtil.Sort { @Cz1rKU^l
/23v]HEPy
private static final int THRESHOLD = 10; ,pLesbI
SCGQo.~,
/* jDXmre?
* (non-Javadoc) _ORW'(:Z
* ^+GN8LUs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?7G[`@^Y
*/ t:M>&r:BL
public void sort(int[] data) { b]|7{yMV
int[] temp=new int[data.length]; K[?wP>s
mergeSort(data,temp,0,data.length-1); FfD2 &(-R
} 29av8eW?3
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private void mergeSort(int[] data, int[] temp, int l, int r) { jWU)y)$
int i, j, k; ?nt6vqaV
int mid = (l + r) / 2; $mlsFBd
if (l == r) ^eZqsd8a
return; jBE=Ij
if ((mid - l) >= THRESHOLD) DcOu=Y> 1
mergeSort(data, temp, l, mid); P `2Rte6s
else IloHU6h'
insertSort(data, l, mid - l + 1); ;nh7Elk
if ((r - mid) > THRESHOLD) |#-Oz#Eg'
mergeSort(data, temp, mid + 1, r); UI!EIZ*~
else G53!wIW2:
insertSort(data, mid + 1, r - mid); NEGpf[$
4tu2%Og)?
for (i = l; i <= mid; i++) { ait/|a
temp = data; l;|1C[V
} w^ DAu1
for (j = 1; j <= r - mid; j++) { ")sq?1?X
temp[r - j + 1] = data[j + mid]; DD~8:\QD
} i,)kI
int a = temp[l]; w\@Anwj#L
int b = temp[r]; ^3r2Q?d\
for (i = l, j = r, k = l; k <= r; k++) { z ,ledTl
if (a < b) { a(J~:wgd
data[k] = temp[i++]; oa9T3gQ?
a = temp; \7/xb{z|
} else { DAvAozM
data[k] = temp[j--]; 9k*'5(D4S
b = temp[j]; PMTyiwlm
} UhEnW8^bz1
} wEkW=
} 3b[_0
(JF\%Yj/
/** 7vHU49DV
* @param data =j}00,WH
* @param l Ur@'X-
* @param i FD`V39##
*/ IzL yn
private void insertSort(int[] data, int start, int len) { TnKe"TA|9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Zd5frc$
} |H |ewVUY
} Zd~Z`B} &
} 9xWeVlfQ
} n=yFw\w'
s\ ~r 8
堆排序： YHAy+S
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package org.rut.util.algorithm.support; \y0abxIHS
U,+=>ns>
import org.rut.util.algorithm.SortUtil; CF$^we
y\@XW*_?
/** 0<P -`|X
* @author treeroot R"82=">v
* @since 2006-2-2 RQh4RUm
* @version 1.0 icnp^2P
*/ A46y?"]/30
public class HeapSort implements SortUtil.Sort{ k|g~xmI;
IPY@9+]
/* (non-Javadoc) M<)HJ lr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H>W A?4
*/ p oNQ<ijK
public void sort(int[] data) { zx\?cF
MaxHeap h=new MaxHeap(); YxsWY7J
h.init(data); g@S"!9[;U
for(int i=0;i h.remove(); G_X'd
System.arraycopy(h.queue,1,data,0,data.length); ci*Z9&eS+
} X"[c[YT!%[
Y=Bk;%yT=
private static class MaxHeap{ ~A6QX8a
tt`b+NOH>
void init(int[] data){ jLZ~9FXF2
this.queue=new int[data.length+1]; \a}%/_M\
for(int i=0;i queue[++size]=data; ffSecoX
fixUp(size); rt."P20T
} Z!ub`coV[
} 0h#' 3z<
Gh@QR`xxc
private int size=0; c"fnTJXr79
M#2DI?S@
private int[] queue; _STN^
P/0n) Q
public int get() { j4Lf6aUOX
return queue[1]; y=q\1~]Z
} )TV'eq
QDyL0l{C
public void remove() { nC2A&n&>
SortUtil.swap(queue,1,size--); :}j{NM#
fixDown(1); J;G+6C$:
} F7L+bv
file://fixdown 4egq Y0A
private void fixDown(int k) { & XcY|y=W
int j; 8wwD\1pLS
while ((j = k << 1) <= size) { +e4o~p
if (j < size %26amp;%26amp; queue[j] j++; S^~GI$
if (queue[k]>queue[j]) file://不用交换 >D*L0snjV
break; +]Ydf^rF
SortUtil.swap(queue,j,k); NbfV6$jo
k = j; H{9di\xnEm
} ^TnBtIU-B
} p"Fj6T2
private void fixUp(int k) { LL.YkYu
while (k > 1) { }cMb0`oA
int j = k >> 1; YB~}!F [(
if (queue[j]>queue[k]) rHh<_5-/>
break; *y F 9_\n
SortUtil.swap(queue,j,k); $\{@wL
k = j; mVW:]|!s
} %5a>@K]
} Ean@GDLz8
vBKBMnSd
} ZOfyy E
nIKh<ws4z
} ,%yjEO
vA:1z$m
SortUtil： X8p-VCkV
De\&r~bTW9
package org.rut.util.algorithm; Ll%[}C?~]?
hQPiGIs
import org.rut.util.algorithm.support.BubbleSort; XkOsnI8n
import org.rut.util.algorithm.support.HeapSort; d\D.l^
import org.rut.util.algorithm.support.ImprovedMergeSort; ^q7 fN0"6
import org.rut.util.algorithm.support.ImprovedQuickSort; \h?C G_|]
import org.rut.util.algorithm.support.InsertSort; dz&8$(f,
import org.rut.util.algorithm.support.MergeSort; i5q VQo
import org.rut.util.algorithm.support.QuickSort; wjQu3 ,Cj
import org.rut.util.algorithm.support.SelectionSort; hH|3s-o
import org.rut.util.algorithm.support.ShellSort; $_% a=0
,;hIyT
/** 6:#zlKYJ
* @author treeroot 3<CCC+47
* @since 2006-2-2 s9@/(_
* @version 1.0 t|%wVj?_
*/ f9F@G&&Ugg
public class SortUtil { [C9->`(`
public final static int INSERT = 1; ON\_9\kv
public final static int BUBBLE = 2; Ztr,v$
public final static int SELECTION = 3; =gw'MA
public final static int SHELL = 4; E9YR *P4$
public final static int QUICK = 5; |fOQm
public final static int IMPROVED_QUICK = 6; +r"{$'{^
public final static int MERGE = 7; 6/Q'o5>NL:
public final static int IMPROVED_MERGE = 8; 6ix8P;;}#
public final static int HEAP = 9; #jv~FR`4v^
w?Cqe N
public static void sort(int[] data) { E~3wdOZv1
sort(data, IMPROVED_QUICK); VW}xY
} X@2[!%nm
private static String[] name={ I_oJx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Cpz'6F^oP
}; D({%FQ"
M6[&od
private static Sort[] impl=new Sort[]{ &2d^=fih
new InsertSort(), K}L-$B*i
new BubbleSort(), bb`GV
new SelectionSort(), {.K>9#^m
new ShellSort(), 'C)`j{CS
new QuickSort(), Xk8+m>
new ImprovedQuickSort(), esIEi!d
new MergeSort(), mw-0n
new ImprovedMergeSort(), `<cB 6
new HeapSort() q~48lxDU
}; q]ER_]%Gna
K?8{y
public static String toString(int algorithm){ rzsb(
return name[algorithm-1]; [kM)K'-
} @7e h/|Y,
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public static void sort(int[] data, int algorithm) { g[!t@K
impl[algorithm-1].sort(data); w$MFCJ:p&
} NTkGLD1e.
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public static interface Sort { /GD4GWv :
public void sort(int[] data); yZj:Kp+7
} =* oFs|v
zxTcjC)y
public static void swap(int[] data, int i, int j) { yl0&|Ub
int temp = data; B"ZW.jMaI
data = data[j]; .DiH)
data[j] = temp; AKk6kI8F
} ~ODm?k
} g"Mqh!{ FI