[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; kUUN2
} D(Pd?iQIO
int i1=l; MG*#-<OV.
int i2=mid+1; (*;b\h
for(int cur=l;cur<=r;cur++){ we4e>)
if(i1==mid+1) 8Focs p2
data[cur]=temp[i2++]; TbXp%O:[W
else if(i2>r) )TP1i
data[cur]=temp[i1++]; _k\*4K8L
else if(temp[i1] data[cur]=temp[i1++]; T6=c9f?7
else \L}Soe'
data[cur]=temp[i2++]; zy(sekX;
} |g;hXr#~
} Y#V`i K
jX-v9eaA
} M`-#6,m3
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改进后的归并排序: U; JZN
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package org.rut.util.algorithm.support; F-R4S^eV
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import org.rut.util.algorithm.SortUtil; D.kLx@Z
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/** 3 q^3znt
* @author treeroot ^ b{0|:
* @since 2006-2-2 J(ZYoJ
* @version 1.0 &p8b4y_
*/ -M2c8P:.b
public class ImprovedMergeSort implements SortUtil.Sort { \rn:/
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private static final int THRESHOLD = 10; )[|TxXz d
{" woBOaA
/* (n;#Z,
* (non-Javadoc) =H%c/Jty
* g,h'K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Wz)s#
*/ i^eU!^KF
public void sort(int[] data) { #f0J.)M
int[] temp=new int[data.length]; 3,DUT{2
mergeSort(data,temp,0,data.length-1); :aI[ lZ
} 1Jg&L~Ws"
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private void mergeSort(int[] data, int[] temp, int l, int r) { w6zB uW
int i, j, k; wwE`YY
int mid = (l + r) / 2; |k1(|)%G
if (l == r) V|e9G,z~A
return; VI: !#
if ((mid - l) >= THRESHOLD) es 8%JTi
mergeSort(data, temp, l, mid); &<2~7?$!
else m X{_B!j^
insertSort(data, l, mid - l + 1); @W[`^jfQ
if ((r - mid) > THRESHOLD) f]W$4f{
mergeSort(data, temp, mid + 1, r); %ZF47P%6
else [v( \y
insertSort(data, mid + 1, r - mid); Q'/v-bd?o
/FJ )gQYA
for (i = l; i <= mid; i++) { /Fy2ZYs,`8
temp = data; b-ZC~#?|b
} ^&F8NEb=2>
for (j = 1; j <= r - mid; j++) { Yj)H!Cp.xD
temp[r - j + 1] = data[j + mid]; 0}}b\!]9
} xTiC[<j
int a = temp[l]; f40xS7-Q0
int b = temp[r]; R8O;8c?D
for (i = l, j = r, k = l; k <= r; k++) { 1vk&;
if (a < b) { @xIKYJyU
data[k] = temp[i++]; i%w[v_j
a = temp; |(G^3+5Uwm
} else { HJWk%t<
data[k] = temp[j--]; .Y|5i^i9{
b = temp[j]; !E"&#>r
} Y` t-Bg!~
} Teh _
} -XBD WV
i,|2F9YH
/** 8 SFw|
* @param data ;}"!|
* @param l vncLB&@7
* @param i DdDwMq
*/ CzDJbvv]
private void insertSort(int[] data, int start, int len) { 8-]\C
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &v9*D`7L
} 5q4sxY9T
} t M?3oO
} :j feY
} _]zm02|
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堆排序： 3H"bivK
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package org.rut.util.algorithm.support; U?BuV
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import org.rut.util.algorithm.SortUtil; _voU^-
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/** 0 ~K4vSa
* @author treeroot |uL"/cMW7
* @since 2006-2-2 :+Ti^FF`w
* @version 1.0 L-SWs8
*/ {}x{OP
public class HeapSort implements SortUtil.Sort{ ~Y;_vU
"A?&`}%
/* (non-Javadoc) %z1y3I|`[t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JR>v
*/ (NB\wJg $
public void sort(int[] data) { G_OLUuK?C
MaxHeap h=new MaxHeap(); mtfEK3?2*
h.init(data); NABVU0}
for(int i=0;i h.remove(); ^q{=mf`
System.arraycopy(h.queue,1,data,0,data.length); KlOL5"3
} V% -wZL/
=VXxQ\{
private static class MaxHeap{ oY Y?`<N#
fu 0]BdM
void init(int[] data){ !.\-l2f
this.queue=new int[data.length+1]; 4l)Q
for(int i=0;i queue[++size]=data; |a!y%R=
fixUp(size); \ct7~!qM
} ;F3#AO4(
} .]gY{_|x
_}G1/`09#
private int size=0; ?VM4_dugf
8":O\^i
private int[] queue; lxSCN6
#\DKU@|h
public int get() { cow]qe6K
return queue[1]; iLhxcM2K
} WBOebv
BBkYc:B=SA
public void remove() { +2&+Gh.h
SortUtil.swap(queue,1,size--); +,wCV2>\3
fixDown(1); [*i6?5}-
} Fkq;Q
file://fixdown b Ag>;e(
private void fixDown(int k) { j=>:{`*c
int j; /U1&#"P
while ((j = k << 1) <= size) { w]-,X`
if (j < size %26amp;%26amp; queue[j] j++; H<YhO&D*u
if (queue[k]>queue[j]) file://不用交换 Ic!8$NhRS
break; ;`CNe$y
SortUtil.swap(queue,j,k); T1Gy_ G/
k = j; ;Nfd
} ;giW
} e/S^Rx4W
private void fixUp(int k) { +#$(>6Zu"{
while (k > 1) { !/]vt?v#^
int j = k >> 1; )cF1?2
if (queue[j]>queue[k]) 7"|j.Yq$H{
break; J|Af`HJ
SortUtil.swap(queue,j,k); =A yDVWpE
k = j; 335\0~;3
} aM2[<m}
} *Y!c6eA
9bE/7v
} }iu(-{Z
'OERW|BO
} Z3jtq-y
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SortUtil： aC9PlKI
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package org.rut.util.algorithm; BkO)hze
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import org.rut.util.algorithm.support.BubbleSort; ?:8wDV
import org.rut.util.algorithm.support.HeapSort; Hf^Tok^6@]
import org.rut.util.algorithm.support.ImprovedMergeSort; W5#5RK"uX
import org.rut.util.algorithm.support.ImprovedQuickSort; ga#Yd}G^~3
import org.rut.util.algorithm.support.InsertSort; O7KR~d
import org.rut.util.algorithm.support.MergeSort; c"<bq}L7S
import org.rut.util.algorithm.support.QuickSort; v<2B^(i}VB
import org.rut.util.algorithm.support.SelectionSort; "?[7oI}c&
import org.rut.util.algorithm.support.ShellSort; $hCPmiI
>WKlR` J%
/** (l~3~n
* @author treeroot Vv]81y15Q;
* @since 2006-2-2 q/|WkV `m
* @version 1.0 pbM"tr_A{
*/ ZJ|@^^GcL
public class SortUtil { 9F*],#ng
public final static int INSERT = 1; X*cf|g
public final static int BUBBLE = 2; eqFOPK5q
public final static int SELECTION = 3; *`(/wE2v]
public final static int SHELL = 4; pPezy:
public final static int QUICK = 5; wd=xs7Dz<p
public final static int IMPROVED_QUICK = 6; :2n(WXFFI
public final static int MERGE = 7; ' YONRha
public final static int IMPROVED_MERGE = 8; tFYIKiq2
public final static int HEAP = 9; 9gz"r
&dC #nw
public static void sort(int[] data) { c=-2c&=&
sort(data, IMPROVED_QUICK); =XT'D@q~W
} wu2AhMGmw
private static String[] name={ h/CF^0m"!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $_.m<
}; CCX!>k]
a%wK[yVp
private static Sort[] impl=new Sort[]{ {]a 6o[}u
new InsertSort(), R+s_uwS
new BubbleSort(), JKFV7{%Gl
new SelectionSort(), ? 77ye
new ShellSort(), @c8s<9I]
new QuickSort(), tv_Cn w
new ImprovedQuickSort(), Q9~UL^bF
new MergeSort(), JqDj)}fzX
new ImprovedMergeSort(), K7x,>
new HeapSort() .%@=,+nqz
}; oc2aE:>X
x%;Q /7&$
public static String toString(int algorithm){ Kk^tQwj/QE
return name[algorithm-1]; jaoGm$o>"F
} mndUQN_Gb
us.+nnd
public static void sort(int[] data, int algorithm) { N1V qK
impl[algorithm-1].sort(data); Q&rf&8iH
} J)l]<##
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public static interface Sort { :*2+t-
public void sort(int[] data); l;e&p${P
} lRn6Zh
v!;E1
public static void swap(int[] data, int i, int j) { t `4^cd5V
int temp = data; d E@R7yU@
data = data[j]; `;^%t
data[j] = temp; @UO=)PxN3
} h&!k!Su3#
} "~h.u