[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; 0V}vVAa(B
} @w6^*Z_hQ
int i1=l; HC4ad0Gs+{
int i2=mid+1; >}u?{_s *0
for(int cur=l;cur<=r;cur++){ (LRv c!`"
if(i1==mid+1) \E?1bc{\f
data[cur]=temp[i2++]; O`t ]#
else if(i2>r) =[t([DG
data[cur]=temp[i1++]; )Ah
else if(temp[i1] data[cur]=temp[i1++]; :'Imz
else Fdu0?H2TL
data[cur]=temp[i2++]; J%f5NSSU{6
} 5&2=;?EO
} `W?aq]4x5
'/;#{("
} *-_` xe
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改进后的归并排序: _\sm$ `q
qg:1
package org.rut.util.algorithm.support; ?*,N ?s(U
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import org.rut.util.algorithm.SortUtil; N.xmHvPk
:XBeGNI*#
/** l%fnGe` _
* @author treeroot 8,dCx}X
* @since 2006-2-2 0NpxqeIDY
* @version 1.0 1.yw\ZC\
*/ $hn_4$
public class ImprovedMergeSort implements SortUtil.Sort { Zf]d'oW{/
TDtk'=;
private static final int THRESHOLD = 10; z ;y22
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/* c !P9`l~MQ
* (non-Javadoc) %>xW_5;Z
* .b N0!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8dIgw
*/ L V33vy
public void sort(int[] data) { W|D'S}J
int[] temp=new int[data.length]; 0[PPVr:
mergeSort(data,temp,0,data.length-1); JYm@Llf)$
} kt X(\Hf!
'9<Mk-Aj
private void mergeSort(int[] data, int[] temp, int l, int r) { ^"6xE nA]
int i, j, k; 'n!;7*
int mid = (l + r) / 2; R*Pfc91}
if (l == r) YIgzFt[L
return; ] =>vv;L
if ((mid - l) >= THRESHOLD) ;?zb (2
mergeSort(data, temp, l, mid); ((EN&X,v
else C"IPCJYn
insertSort(data, l, mid - l + 1); 0~Yg={IKhK
if ((r - mid) > THRESHOLD) biKpV?Dp
mergeSort(data, temp, mid + 1, r); I7BfA,mZ7
else H0tjN&O_
insertSort(data, mid + 1, r - mid); )u\"xxcV
q$b/T+-ec
for (i = l; i <= mid; i++) { HewVwD<C
temp = data; Zn#ri 8S
} <po(7XB
for (j = 1; j <= r - mid; j++) { )]>=Uo
temp[r - j + 1] = data[j + mid]; ]Z<{ ~
} qhF/iUE
int a = temp[l]; Om>6<3n
int b = temp[r]; JWMIZ{/M
for (i = l, j = r, k = l; k <= r; k++) { kwGj7'
if (a < b) { #MGZje,I
data[k] = temp[i++]; 'cH),~ z
a = temp; JguE#ob2
} else { t4h05i
data[k] = temp[j--]; JO+ hD4L
b = temp[j]; b LL!iz?
} ,@Ed)Zoh
} x-y=Jor
} qZ_^#%zO
0lmoI4bW}s
/** YfxZ<
* @param data UvQxtT]
* @param l 7OC,KgJ3
* @param i ;M"hX
*/ ;EFs2-{K
private void insertSort(int[] data, int start, int len) { TrkoLJmB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?>RJ8\Sj
} wAkoX
} =B<g_9d4
} /wCP(1Mw
} nfrC@Av
C@]Z&H;
堆排序： zq{L:.#ha
p+9vSM #
package org.rut.util.algorithm.support; J"6_H =s
=x/]2+ s
import org.rut.util.algorithm.SortUtil; Q*mPU=<
[R A=M
/** !i)?j@D
* @author treeroot %0: (''
* @since 2006-2-2 NwT3e&u%|
* @version 1.0 dVO|q9 /
*/ tV#x{DN
public class HeapSort implements SortUtil.Sort{ I!# 42~\
<]CO}r
/* (non-Javadoc) tQ?? nI2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oB_{xu$6|
*/ Q6.},o
public void sort(int[] data) { U]e;=T:3
MaxHeap h=new MaxHeap(); l6l)M
h.init(data); *<Qn)Az
for(int i=0;i h.remove(); =H!u4
System.arraycopy(h.queue,1,data,0,data.length); LAMTf"a
} }p8a'3@Z
(U$ F) 7
private static class MaxHeap{ =UTv
p_P'2mf
void init(int[] data){ m:p1O3[R
this.queue=new int[data.length+1]; _h@e.BtDs
for(int i=0;i queue[++size]=data; p@r~L(>+3
fixUp(size); 8@b@y|#]X
} n/^wzG
} -I4@` V
@BW~A@8
private int size=0; xQaN\):^8
@xO<~
private int[] queue; uiDR}
47 m:z5;
public int get() { g%9I+(?t
return queue[1]; \n:'>:0X!
} c1MALgK~}\
RE*UIh*O
public void remove() { 9O@eJ$
SortUtil.swap(queue,1,size--); 7z F29gC
fixDown(1); q\mVZyj
} K[T?--H
file://fixdown Q !S"=2
private void fixDown(int k) { )ALf!E%{
int j; 8Jxo;Y
while ((j = k << 1) <= size) { 'y;[ fwo7
if (j < size %26amp;%26amp; queue[j] j++; /o8h1L=
if (queue[k]>queue[j]) file://不用交换 7c+TS--
break; ";s?#c
SortUtil.swap(queue,j,k); <K4'|HU/
k = j; zy+|)^E
} 4HkOg)a
} f&{2G2O%
private void fixUp(int k) { t55 '
while (k > 1) { 0QEVL6gw
int j = k >> 1; U.?,vw'aai
if (queue[j]>queue[k]) /Pi{Mv eZM
break; =AZ>2P
SortUtil.swap(queue,j,k); 9{xP~0g
k = j; |910xd`Z
} u]"oGJj1
} FS`{3d2K +
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} g4I(uEJk
lh8`.sWk4V
} mm:\a-8j
Os?~U/
SortUtil： 8BLtTpu
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package org.rut.util.algorithm; AP/5,M<
yy/wSk
import org.rut.util.algorithm.support.BubbleSort; &m+s5
import org.rut.util.algorithm.support.HeapSort; s?E7tmaM
import org.rut.util.algorithm.support.ImprovedMergeSort; !cp ,OrO\
import org.rut.util.algorithm.support.ImprovedQuickSort; -br/
import org.rut.util.algorithm.support.InsertSort; e[w)U{|40
import org.rut.util.algorithm.support.MergeSort; "E8-76n
import org.rut.util.algorithm.support.QuickSort; DghX(rs_
import org.rut.util.algorithm.support.SelectionSort; rDUNA@r
import org.rut.util.algorithm.support.ShellSort; <E$5LP;:
'S@C,x%2,
/** Qmzj1e$6x
* @author treeroot >!`T=(u!
* @since 2006-2-2 e)7[weGN
* @version 1.0 ,C(")?4aJ
*/ &``;1/J*W
public class SortUtil { cKFzn+
public final static int INSERT = 1; @ZD1HA,h"
public final static int BUBBLE = 2; *vUKh^="
public final static int SELECTION = 3; 0(:"q!h
public final static int SHELL = 4; />K$_T/]
public final static int QUICK = 5; f:Ju20D
public final static int IMPROVED_QUICK = 6; F~{yqY5]n
public final static int MERGE = 7; LnrR#fF]Z
public final static int IMPROVED_MERGE = 8; xr)kHJ:v
public final static int HEAP = 9; hpLo
3V LwMF?
public static void sort(int[] data) { I)Lg=n$
sort(data, IMPROVED_QUICK); e!G I<
} i&{8a3B
private static String[] name={ *sZOws<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ok2k; +l
}; WR gAc%
,MuLu,$/
private static Sort[] impl=new Sort[]{ kJHUaXM
new InsertSort(), $*L@ym
new BubbleSort(), Qighvei
new SelectionSort(), m0XK?;\V
new ShellSort(), B.Ic8'
new QuickSort(), VX2bC(E'%
new ImprovedQuickSort(), vr=iG xD
new MergeSort(), 7GWPsaPn
new ImprovedMergeSort(), IkL|bV3E0
new HeapSort() 552c4h/T
}; EJb"/oLla
"A,]y E
public static String toString(int algorithm){ tlI3jrgw
return name[algorithm-1]; G5bi,^G7
} qmtVk
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public static void sort(int[] data, int algorithm) { [1 w
impl[algorithm-1].sort(data); YeYFPi#
} h*h+VM
HQ ^> ~
public static interface Sort { }4 P@`>e/`
public void sort(int[] data); IEjKI"
} n=L;(jp<j
p\b:uy6#
public static void swap(int[] data, int i, int j) { o @~XX@5l
int temp = data; F+*: >@3
data = data[j]; n]6xrsE
data[j] = temp; <;phc~0+
} <y(>z*T;
} (#X/sZQh