[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; &wOE\TCL
} }H5/3be
int i1=l; _OLI%o
int i2=mid+1; 3\]~!;dI
for(int cur=l;cur<=r;cur++){ C[R`Ml
if(i1==mid+1) 2HSb.&7-G
data[cur]=temp[i2++]; ]uAS+shQ&
else if(i2>r) PFm\[2
data[cur]=temp[i1++]; / xs9.w8-
else if(temp[i1] data[cur]=temp[i1++]; j|k@MfA
else ]?M)NRk%S
data[cur]=temp[i2++]; i]dz}=j'
} jK e.gA
} moaodmt]x
Fk aXA.JE
} p+vh[+yp
]r!QmWw~V
改进后的归并排序: D@:"f?K>
Rh[Ibm56
package org.rut.util.algorithm.support; my4\mi6P
V\"1wV~E
import org.rut.util.algorithm.SortUtil; d[S#Duz<&
an.`dBm
/** 'Wtf>`
* @author treeroot e+l\\9v
* @since 2006-2-2 ,&[7u9@
* @version 1.0 BD4`eiu"
*/ (U_wp's
public class ImprovedMergeSort implements SortUtil.Sort { aTG[=)xL
Jl_~_Z
private static final int THRESHOLD = 10; 6Etss!_
<&6u]uKrW
/* &u=8r*
* (non-Javadoc) $e*B:}x}
* "9%qbMB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "Tv:*L5
*/ o(zTNk5d
public void sort(int[] data) { 8?kP*tmcZ
int[] temp=new int[data.length]; &>g~-s
mergeSort(data,temp,0,data.length-1); jFG5)t<D
} l=xt;c!
McP~}"!^
private void mergeSort(int[] data, int[] temp, int l, int r) { +2Z#M
int i, j, k; Gnk|^i;t
int mid = (l + r) / 2; 4~Dax)
if (l == r) ]x@~-I )
return; nc&Jmo7
if ((mid - l) >= THRESHOLD) hF.6}28U1
mergeSort(data, temp, l, mid); BJgDo
else guE2THnz3D
insertSort(data, l, mid - l + 1); C38%H
if ((r - mid) > THRESHOLD) yhwy>12,K
mergeSort(data, temp, mid + 1, r); |AC6sfA+
else ~#q;bS
insertSort(data, mid + 1, r - mid); QLn+R(r
6"+8M 3M l
for (i = l; i <= mid; i++) { Z(`r-}f I
temp = data; C.( yd$,
} 8kS~ENe?o
for (j = 1; j <= r - mid; j++) { wFb@1ae\
temp[r - j + 1] = data[j + mid]; 5 < GDW=
} -bm,:Iy!
int a = temp[l]; pC^2Rzf
int b = temp[r]; ABZ06S/
for (i = l, j = r, k = l; k <= r; k++) { e3g_At\
if (a < b) { NpR6
data[k] = temp[i++]; ]4o?BkL
a = temp; "wINBya'M
} else { qv uxhzF
data[k] = temp[j--]; > H~6NBd5D
b = temp[j]; V^2-_V]8
} )!sa)\E?
} (Q_2ODKo
} [ f34a
lQL:3U0DjU
/** "{ FoA3g|
* @param data d;44;*D
* @param l ?:/|d\,7@
* @param i mW +tV1XjG
*/ lhxdx
private void insertSort(int[] data, int start, int len) { ^yJ:+m;6K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nB&j
} ;wgFr.#hp@
} SX_4=^
} 'F7VM?HBfg
} f'_M0x
)*D'csGc
堆排序： m|1n x
o%qkqK1
package org.rut.util.algorithm.support; c3W BALdh
<[<247%
import org.rut.util.algorithm.SortUtil; HTR1)b
xqv[? ?
/** |7c`(.
* @author treeroot 'Sa!5h
* @since 2006-2-2 yC"Zoa6YZ
* @version 1.0 jyQVSQs
*/ W_}/O'l{
public class HeapSort implements SortUtil.Sort{ l#xw.2bo
0Cq!\nzz
/* (non-Javadoc) g_M^E-3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [b;Uz|o
*/ pBU]=[M0
public void sort(int[] data) { C0<YH "
MaxHeap h=new MaxHeap(); $eX*
h.init(data); HsH<m j
for(int i=0;i h.remove(); h[Mdr
System.arraycopy(h.queue,1,data,0,data.length); /buWAX1
} |_nC6;
j)";:v
private static class MaxHeap{ a.,i.2
W>$BF[x!{
void init(int[] data){ c[:Wf<%|
this.queue=new int[data.length+1]; X+at%L=
for(int i=0;i queue[++size]=data; Hg whe=P
fixUp(size); Abf1"#YImy
} L|J~9FM
} T V;BNCg
MA6P"?
private int size=0; [+gzdLad
&CUC{t$VHX
private int[] queue; VVLIeJ(*XT
]QS](BbD:
public int get() { -|[~sj-p
return queue[1]; KIIym9%
} r--;yEjWE
7E(%9W6P
public void remove() { m}pL`:e!
SortUtil.swap(queue,1,size--); ~p^7X2% !
fixDown(1); u>|"28y
} @H+~2;B,
file://fixdown :'Xr/| s
private void fixDown(int k) { +V1}@6k :
int j; n^Vxi;F
while ((j = k << 1) <= size) { Rf:<-C0T
if (j < size %26amp;%26amp; queue[j] j++; 0[9I0YBJ
if (queue[k]>queue[j]) file://不用交换 2&x7W*
break; LU(%K{9
SortUtil.swap(queue,j,k); 8f-:d]
k = j; _>i|s|aW
} HEpM4xe$
} @'HT;Q!\Vd
private void fixUp(int k) { ]>vf9]
while (k > 1) { f?0D%pxc}&
int j = k >> 1; z5pc3:
if (queue[j]>queue[k]) a[i>;0
break; J 8q
SortUtil.swap(queue,j,k); e`AUYli"
k = j; zp#:EZ
} }!=U^A)
} 3SFg#
H+R7X71{
} [ze/@29
4oN${7k0
} 3I\m,Ob
6g|#ho1Bbs
SortUtil： JT#7yetk'
$`v+4]
package org.rut.util.algorithm; $l#{_~ "m7
y7La_FPrl
import org.rut.util.algorithm.support.BubbleSort; ~?-qZ<9/
import org.rut.util.algorithm.support.HeapSort; ig$jKou F
import org.rut.util.algorithm.support.ImprovedMergeSort; RF!'K ko
import org.rut.util.algorithm.support.ImprovedQuickSort; wibwyzo
import org.rut.util.algorithm.support.InsertSort; sbA2W~:
import org.rut.util.algorithm.support.MergeSort; [9HYO
import org.rut.util.algorithm.support.QuickSort; .<dOED{v
import org.rut.util.algorithm.support.SelectionSort; 0# l#,Y6#I
import org.rut.util.algorithm.support.ShellSort; p;e$kg1
P{Lg{I_w.B
/** 5y}BCY2=/
* @author treeroot Vpw[B.v
* @since 2006-2-2 hbH#Co~o4#
* @version 1.0 "8?TSm8
*/ 5pmQp}}R
public class SortUtil { ,m:6qdN
public final static int INSERT = 1; @ge LW!
public final static int BUBBLE = 2; LGfmUb-{]
public final static int SELECTION = 3; @sdS0pC
public final static int SHELL = 4; 8(^ ,r#Gy
public final static int QUICK = 5; 0:#7M}U
public final static int IMPROVED_QUICK = 6; ]$|st^Q
public final static int MERGE = 7; 1xIFvXru
public final static int IMPROVED_MERGE = 8; D Kq-C%
public final static int HEAP = 9; DUhT>,~]
=oPng=:
public static void sort(int[] data) { Gn[*?=Vy
sort(data, IMPROVED_QUICK); fQ1 0O(`g,
} POY=zUQ'/
private static String[] name={ 58PKx5`D
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~Zu}M>-^c,
}; YLigP"*~^
}|,EU!nDi
private static Sort[] impl=new Sort[]{ SKW;MVC
new InsertSort(), u X>PefR
new BubbleSort(), -?Ejbko
new SelectionSort(), Stt* 1gT
new ShellSort(), g/!Otgfu
new QuickSort(), 6}"lm]b
new ImprovedQuickSort(), h)P]gT0f/
new MergeSort(), [m %W:Ez
new ImprovedMergeSort(), tbY SK
new HeapSort() E::<;9
}; o:4CI
Ir^BC!<2>
public static String toString(int algorithm){ v23TL
return name[algorithm-1]; c9|I4=_K
} D?%e"*>
tfsh!)u?
public static void sort(int[] data, int algorithm) { K/~Y!?:Jr
impl[algorithm-1].sort(data); Ty.drM
} 48;~bVr}
Na-q%ru
public static interface Sort { f7S^yA[[
public void sort(int[] data); ynxWQ%d(`
} 8dlInms
A xRl*B
public static void swap(int[] data, int i, int j) { -}NAb^d
int temp = data; /O+e#z2f<
data = data[j]; !\3}R25
data[j] = temp; $,g 3*A
} A<a2TXcIE3
} ~T;K-9R