[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; ){~.jP=-#
} hFv}JQJw<
int i1=l; DEhA8.v
int i2=mid+1; 2}-W@R
for(int cur=l;cur<=r;cur++){ PHkvt!uH
if(i1==mid+1) 'cv/"26#
data[cur]=temp[i2++]; 3[4]G@
else if(i2>r) cCIEG e6
data[cur]=temp[i1++]; +l\Dp
else if(temp[i1] data[cur]=temp[i1++]; `1gsrHi4N
else @UX`9]-P
data[cur]=temp[i2++]; :C5N(x
} "-sz7}Mb
} o\N}?Z,Kk
B=7L+6
} iuEdm:pW
6gXc-}dp
改进后的归并排序: AyDK-8a
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package org.rut.util.algorithm.support; w# ['{GL
hT[O5
import org.rut.util.algorithm.SortUtil; ~JJv 2
~p.23G]x
/** NbdaP{{
* @author treeroot _wMz+<7bY
* @since 2006-2-2 {<lV=0]
* @version 1.0 !TcjB;q'
*/ 6*E7}
public class ImprovedMergeSort implements SortUtil.Sort { |8"HTBb\CW
-9mh|&z`
private static final int THRESHOLD = 10; G+ToZ&f@
8Vx'sJ>r4
/* qXW5_iX
* (non-Javadoc) 9ccEF6o0=
* fXN;N&I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s$Mj4_p3l
*/ YeQX13C"Z
public void sort(int[] data) { H:`r!5&Qb5
int[] temp=new int[data.length]; ][Kj^7/
mergeSort(data,temp,0,data.length-1); <M=K!k
} lPH]fWt<
I?=Q *og
private void mergeSort(int[] data, int[] temp, int l, int r) { \K=Jd#9c
int i, j, k; rfk';ph
int mid = (l + r) / 2; yR&E6o.$z
if (l == r) j JW0a\0
return; M:A7=rO~
if ((mid - l) >= THRESHOLD) TSOt$7-
mergeSort(data, temp, l, mid); wXP1tM8T
else Ut<_D8Tzx
insertSort(data, l, mid - l + 1); ~o+u:]
if ((r - mid) > THRESHOLD) 3Cpix,Dc
mergeSort(data, temp, mid + 1, r); /)|*Vzu
else _M?:N:e
insertSort(data, mid + 1, r - mid); \ZA%"F){
tw;`H( UZ^
for (i = l; i <= mid; i++) { b3Do{1BV
temp = data; :)+cI?\#
} nD!^0?
for (j = 1; j <= r - mid; j++) { RtSk;U1
temp[r - j + 1] = data[j + mid]; :U~[%]
} hHdC/mR
int a = temp[l]; 9 eP @}C6
int b = temp[r]; "`lRX
for (i = l, j = r, k = l; k <= r; k++) { $Uzc
if (a < b) { "B.lj)
data[k] = temp[i++]; Ji=E 1R
a = temp; bH&[O`vf
} else { vJYy`k^Y
data[k] = temp[j--]; ;yH/GN#O
b = temp[j]; b.$Gc!g
} UlyX$f%2
} vHWw*gg(/E
} 7-)Y\D
}lhJt|qc
/** +&|WC2#
* @param data t.NG]ejZ
* @param l K{N#^L!
* @param i /QTGZb
*/ ) ><{A
private void insertSort(int[] data, int start, int len) { =\tg$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gCd9"n-e
} Jyvc(~x
} Y]P]^3
} r3#H]c
} B6,"S5@
MSw/_{
堆排序： zL1H[}[z+
w+PbT6;
package org.rut.util.algorithm.support; Uc\\..Cf
I(pU_7mw
import org.rut.util.algorithm.SortUtil; lepgmQ|oY
>pr{)bp G
/** X=-pNwO
* @author treeroot oMcX{v^"
* @since 2006-2-2 6Vi #O^>
* @version 1.0 Ip|7JL0Z
*/ !DD|dVA{
public class HeapSort implements SortUtil.Sort{ xj(&EGY:
Ot5 $~o
/* (non-Javadoc) A\gj\&B0"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JQ!D8Ut
*/ u[y>DPPx
public void sort(int[] data) { ACc.&,!IZ
MaxHeap h=new MaxHeap(); #|)GarDG
h.init(data); LKtr>u
for(int i=0;i h.remove(); (',G Ako
System.arraycopy(h.queue,1,data,0,data.length); g;Bq#/w
} .F&\xa{
zAS&L%^tV
private static class MaxHeap{ \%f4)Qb
G ?H`9*y
void init(int[] data){ $wAVM/u&
this.queue=new int[data.length+1]; ]Ocf %(
for(int i=0;i queue[++size]=data; |v:8^C7
fixUp(size); RR*<txdN
} e$fxC-sZ
} =D<46T=(RB
g.Z>9(>;Y
private int size=0; PKty'}KF
E XEae?
private int[] queue; Jx(%t<2
bo`w(h_
public int get() { kL{2az3"c
return queue[1]; R@u6mMX{N,
} ;VNwx(1l`
^;!A`t
public void remove() { bw ' yX
SortUtil.swap(queue,1,size--); /!uxP~2U
fixDown(1); U_y)p Cd
} LEKN%2
file://fixdown |U>BXX P
private void fixDown(int k) { `b+f^6SJn
int j; n(0O'nS^
while ((j = k << 1) <= size) { eOE7A'X
if (j < size %26amp;%26amp; queue[j] j++; W:ih#YW_F
if (queue[k]>queue[j]) file://不用交换 0,{Dw9W:
break; g< M\zD
SortUtil.swap(queue,j,k); w%g@X6
k = j; 8yF15['
} ,g;~:
} "9>~O`l,
private void fixUp(int k) { dyC: Mko=
while (k > 1) { D N GNc
int j = k >> 1; dc|"34;^"
if (queue[j]>queue[k]) 2X&~!%-
break; /xWkP{
SortUtil.swap(queue,j,k); ?sfA/9"
k = j; C7[_#1Oz
} x;?4AJ{
} =\eM -"r
j*Ta?'*
} ;^^u_SuH
pej/9{*xg(
} F<M#T
@TdPeTw\
SortUtil： !;x
U@@#f;&
package org.rut.util.algorithm; <!v^Df
H 0aDWFWS
import org.rut.util.algorithm.support.BubbleSort; $6Lgaz
import org.rut.util.algorithm.support.HeapSort; rp6Y&3p.
import org.rut.util.algorithm.support.ImprovedMergeSort; S#8wnHq
import org.rut.util.algorithm.support.ImprovedQuickSort; Ou"QUn|
import org.rut.util.algorithm.support.InsertSort; >k,bHGj?
import org.rut.util.algorithm.support.MergeSort; d+[yW7%J
import org.rut.util.algorithm.support.QuickSort; (`5No:?v<
import org.rut.util.algorithm.support.SelectionSort; W/<]mm~95
import org.rut.util.algorithm.support.ShellSort; FVW<F(g`
rRRiqmq
/** KJo[!|.
* @author treeroot 'ejuzE9
* @since 2006-2-2 EDcR:Dw3
* @version 1.0 4_TxFulX.
*/ d kHcG&)
public class SortUtil { zW,m3~XX:
public final static int INSERT = 1; ^o+2:G5z}
public final static int BUBBLE = 2; OmQSNU.our
public final static int SELECTION = 3; " ;_bB"q*
public final static int SHELL = 4; UTGR{>=>
public final static int QUICK = 5; s3HwBA
public final static int IMPROVED_QUICK = 6; nyWA(%N1
public final static int MERGE = 7; &?IOrHSv!
public final static int IMPROVED_MERGE = 8; rk*Igqf
public final static int HEAP = 9; bo '
i[`nu#n/
public static void sort(int[] data) { Z$ Fh4
sort(data, IMPROVED_QUICK); :WIbjI=
} C'4u+raq
private static String[] name={ .;ml[DXH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2+M(!FHfy
}; PwU}<Hrl]
C18pK8-
private static Sort[] impl=new Sort[]{ %Qgo0
new InsertSort(), lEIX,amwa
new BubbleSort(), '}dlVf
new SelectionSort(), @a#qq`b;
new ShellSort(), I~\j%zD
new QuickSort(), ge)g?IP4
new ImprovedQuickSort(), 8+{WH/}y8
new MergeSort(), M7^PWC
new ImprovedMergeSort(), 7Oe |:Z
new HeapSort() 3P3x^NI
}; 4j|]=58
%Js3Y9AL C
public static String toString(int algorithm){ M>P-0IC
return name[algorithm-1]; W-<E p<7{
} )28Jz6.I
`Jhu&MWg
public static void sort(int[] data, int algorithm) { .\M@oF
impl[algorithm-1].sort(data); A\ds0dUE
} ]IMBRZQqb
8fFURk
public static interface Sort { )[yM4QFl
public void sort(int[] data); htk5\^(X
} 9#{?*c6
&1YAPxX
public static void swap(int[] data, int i, int j) { H>AQlO+J
int temp = data; Pwf2dm$,+
data = data[j]; P$S>=*`n U
data[j] = temp; _?#}@?
} lfG]^id'
} V^B'T]s