[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; whI4@#
} rVabkwYD
int i1=l; cC8$oCR?
int i2=mid+1; '&CZ%&(Gw
for(int cur=l;cur<=r;cur++){ i3 js'?7E
if(i1==mid+1) as:=QMV
data[cur]=temp[i2++]; ~criZI/
else if(i2>r) 2?,lr2
data[cur]=temp[i1++]; .r/s.g
else if(temp[i1] data[cur]=temp[i1++]; }%KQrlbHJl
else =o@}~G&HA
data[cur]=temp[i2++]; RlfI]uCDM
} #o&T$D5
} R5sEQ| E
,IiKe_B
} t(}Y/'
eGMw:H
改进后的归并排序: $bp'b<jx
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package org.rut.util.algorithm.support; ejg!1*H@n
)+FnwW
import org.rut.util.algorithm.SortUtil; !5 S#
ccv
/** 2-S}#S}2C
* @author treeroot wgSFL6Ei
* @since 2006-2-2 OBFM70K
* @version 1.0 Q*1Avy6]
*/ K%9!1'
public class ImprovedMergeSort implements SortUtil.Sort { drCL7.j#L
8Ogg(uS70'
private static final int THRESHOLD = 10; n(A;:)W{
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/* Ps! \k%FUl
* (non-Javadoc) .t^1e
* ,ig`'U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .9DhD=8aIO
*/ Njo.-k
public void sort(int[] data) { 6T"5,Q</h
int[] temp=new int[data.length]; aV fsF|,
mergeSort(data,temp,0,data.length-1); *o=Z~U9z
} N#J8 4i;ry
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private void mergeSort(int[] data, int[] temp, int l, int r) { 0>Kgz!I
int i, j, k; }2=~7&)
int mid = (l + r) / 2; :hHKm|1FE
if (l == r) V\Lh(zPt
return; p@$92> '
if ((mid - l) >= THRESHOLD) f`}u9!jVR
mergeSort(data, temp, l, mid); HELTL$j,b
else rl"yE=
insertSort(data, l, mid - l + 1); 7x*L 1>[`'
if ((r - mid) > THRESHOLD) ^b&hy&ag
mergeSort(data, temp, mid + 1, r); 0l(G7Ju
else j1JdG<n
insertSort(data, mid + 1, r - mid); <Rt0 V%}-
SM}& @cJ
for (i = l; i <= mid; i++) { gd)VL}k
temp = data; c:DV8'fT
} RZvRV?<bR
for (j = 1; j <= r - mid; j++) { ZU:c[`
temp[r - j + 1] = data[j + mid]; LNgFk%EH
} ZB}zT9JaE
int a = temp[l]; Lz-(1~o
int b = temp[r]; <.|]%7
for (i = l, j = r, k = l; k <= r; k++) { i .?l\
if (a < b) { u_=>r_J[b
data[k] = temp[i++]; J@Nq
a = temp; mqQ//$Y
} else { uCFpH5>
data[k] = temp[j--]; cMUmJH
b = temp[j]; bmC{d
} 5X`m.lhUc
} K?wo AuY
} uoY]@.
n\scOM)3
/** uQkFFWS
* @param data !"^//2N+,
* @param l p-8x>dmP(
* @param i c+TCC%AJQI
*/ cZ/VMQEr
private void insertSort(int[] data, int start, int len) { $T'lWD*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "qY_O/Eg]]
} $Jy1=/W&
} cr{f*U6`
} vB/G#\Zqz
} SQBe}FlktK
H|!|fo-Tx
堆排序： z`@|v~i0`
v+2t;PJd2
package org.rut.util.algorithm.support; ]OA8H[U-eA
AtlUxFX0S
import org.rut.util.algorithm.SortUtil; =qTmFszT
Z:%~Al:
/** +,ZQ( ZW
* @author treeroot m:{IVvN_
* @since 2006-2-2 [[0u|`T/
* @version 1.0 ~@Eu4ip)F
*/ #ANbhHG
public class HeapSort implements SortUtil.Sort{ @ **]o
%:]ive]e
/* (non-Javadoc) KdtQJ:_`k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kC-OZVoO
*/ z0-`D.D@\
public void sort(int[] data) { jG&gd<^
MaxHeap h=new MaxHeap(); e# KP3Lp
h.init(data); >{=~''d,w
for(int i=0;i h.remove(); )0{ZZ-beG
System.arraycopy(h.queue,1,data,0,data.length); 77;|PKE /
} &Tk@2<5=
6<9gVh<=w
private static class MaxHeap{ Ui}%T]
pt~b=+bBm
void init(int[] data){ B{cb'\C
this.queue=new int[data.length+1]; xU'% 6/G
for(int i=0;i queue[++size]=data; DTCOhUIV
fixUp(size); \(ju0qFqH
} AP(%m';
} _yc&'Wq
|\SwZTr
private int size=0; +P;&/z8i*g
2~QN#u|UC3
private int[] queue; R<e ~Cb-
rIJd(=
public int get() { |:5[`
return queue[1]; P#qQde/y
} X!f` !tZ:{
WS1#i\0
public void remove() { $WG<
SortUtil.swap(queue,1,size--); p$l'y""i
fixDown(1); \Wf1b8FW
} 3/4r\%1b+
file://fixdown oVeC@[U
private void fixDown(int k) { yn.f?[G2
int j; | gP%8nh'C
while ((j = k << 1) <= size) { BVv{:m{w
if (j < size %26amp;%26amp; queue[j] j++; 4i(?5p>f
if (queue[k]>queue[j]) file://不用交换 i" >kF@]c8
break; GA2kg7
SortUtil.swap(queue,j,k); "$PX[:
k = j; 0 LIRi%N5*
} `*--vSi
} hbE~.[Y2r
private void fixUp(int k) { [PL]!\NJ
while (k > 1) { )cYbE1=u8>
int j = k >> 1; Iz[wrtDI1
if (queue[j]>queue[k]) KU (g Zy
break; (sx,Ol
SortUtil.swap(queue,j,k); lIgAc!q(
k = j; YQ7tZl;:t
} E{}Vi>@V?
} [K"&1h<>
e6uVUzP4
} >2dF^cDE-3
L<_zQ
} ;@V1*7y
R]"3^k*
SortUtil： C vWt
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package org.rut.util.algorithm; ><"0GPxrx
::2(pgH
import org.rut.util.algorithm.support.BubbleSort; SX@zDuM
import org.rut.util.algorithm.support.HeapSort; 5yQ\s[;o3
import org.rut.util.algorithm.support.ImprovedMergeSort; H:.l:PJ
import org.rut.util.algorithm.support.ImprovedQuickSort; *#Hw6N0#
import org.rut.util.algorithm.support.InsertSort; q,*([yX
import org.rut.util.algorithm.support.MergeSort; 'uU{.bq
import org.rut.util.algorithm.support.QuickSort; >PoVK{&y
import org.rut.util.algorithm.support.SelectionSort; .yb=I6D;<3
import org.rut.util.algorithm.support.ShellSort; B),Z*lpC
A,]%*kg2
/** c,_??8
* @author treeroot *1CZRfWI
* @since 2006-2-2 <}bF49z
* @version 1.0 <^fvTb&*
*/ #Hi$squJ
public class SortUtil { &20}64eW%
public final static int INSERT = 1; CCU<t Q
public final static int BUBBLE = 2; @szr '&\%A
public final static int SELECTION = 3; ,BE4z2a
public final static int SHELL = 4; 52#Ac;Y
public final static int QUICK = 5; zt/N)5\V
public final static int IMPROVED_QUICK = 6; vw[i.af
public final static int MERGE = 7; ?"L ^0%
public final static int IMPROVED_MERGE = 8; s|d"2w6t
public final static int HEAP = 9; 9jW"83*5
G'f5MP1
public static void sort(int[] data) { BSHtoD@e7
sort(data, IMPROVED_QUICK); R;`C;Rbf
} a/dq+
private static String[] name={ :FX|9h
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8KHT"uc'*J
}; `$i/f(t6`
0=Mu|G|Z
private static Sort[] impl=new Sort[]{ YK%rTbB(
new InsertSort(), ,WQg.neOA
new BubbleSort(), $ uqB.f$
new SelectionSort(), 6Eyinv
new ShellSort(), YG J)_y
new QuickSort(), 2i)vT)~
new ImprovedQuickSort(), <db>~@;X!
new MergeSort(), @~8*
new ImprovedMergeSort(), Q%n$IQr4gM
new HeapSort() 8ib%CYR
}; oUx%ra{
2VaKt4+`
public static String toString(int algorithm){ (Fs{~4T
return name[algorithm-1]; /MZ^;XG
} -T{G8@V0I
jzd)jJ0M
public static void sort(int[] data, int algorithm) { O#?@'1
impl[algorithm-1].sort(data); p,7, tx
} w:07_`cH=
4}F~h
public static interface Sort { 'b:e8m
public void sort(int[] data); y85R"d
} QJ2D C
FA!!S`{\
public static void swap(int[] data, int i, int j) { ^]MLEr!S
int temp = data; p((a(Q/
data = data[j]; FwUgMR*xq
data[j] = temp; \gR%PN
} }56WAP}Z 4
} T,h9xl9i