[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; 0.T4{JS#
} F'jWV5"*
int i1=l; lO&3{dOYE
int i2=mid+1; ]D[DU]K
for(int cur=l;cur<=r;cur++){ gb ^?l~SS
if(i1==mid+1) MFTkqbc
data[cur]=temp[i2++]; J;_}lF9d@
else if(i2>r) 'o|30LzYgQ
data[cur]=temp[i1++]; b2aF 'y/
else if(temp[i1] data[cur]=temp[i1++]; EVp,Q"V]
else 3bk|<7tl
data[cur]=temp[i2++]; )[0T16
} f` =CpO*
} @KX \Er
(" LQll9
} +a-6Q ~
];.pK
改进后的归并排序: '!l1=cZD
4wC+S9I#E^
package org.rut.util.algorithm.support; l^ZI* z7N
6"Bic rY
import org.rut.util.algorithm.SortUtil; $o$ maA0
d>;&9;)H
/** M@ed>.
* @author treeroot pw7[y^[Qg
* @since 2006-2-2 :Y9NLbv
* @version 1.0 'F>'(XWWQ
*/ NR;1z
public class ImprovedMergeSort implements SortUtil.Sort { ml\4xp,
T,| 1g6
private static final int THRESHOLD = 10; X[f=h=|
\j&^aAp r
/* !r#?C9Sq
* (non-Javadoc) -S3MH1TZ
* $O9^SB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O'Js}
*/ 9Xx's%U
public void sort(int[] data) { m(pE5B(
int[] temp=new int[data.length]; EwOV;>@T?
mergeSort(data,temp,0,data.length-1); 7S?4XyU/o
} \[Z?&
w)Covz'uf
private void mergeSort(int[] data, int[] temp, int l, int r) { @V03a )6,h
int i, j, k; Eb=}FuV
int mid = (l + r) / 2; ^Z:~91Tv-_
if (l == r) jDQZQ NS
return; ^f# FI&
if ((mid - l) >= THRESHOLD) os/vtyP:a
mergeSort(data, temp, l, mid); [IK )
else R: l&2k@
insertSort(data, l, mid - l + 1); ABUSTf<
if ((r - mid) > THRESHOLD) sQMFpIrr
mergeSort(data, temp, mid + 1, r); DGzw8|/(
else m!<\WN6g
insertSort(data, mid + 1, r - mid); [B+W%g(c-
mEG#>Gg$
for (i = l; i <= mid; i++) { zbq@pj)Qu
temp = data; 6R=W}q4
} Q+YRf3$
for (j = 1; j <= r - mid; j++) { 7b<yVP;{
temp[r - j + 1] = data[j + mid]; ULQMG'P^D
} hWX% 66
int a = temp[l]; \Gc+WpS(
int b = temp[r]; HD(.BW7
for (i = l, j = r, k = l; k <= r; k++) { "HPB!)C8(
if (a < b) { i&VsW7
data[k] = temp[i++]; 66fO7OJs
a = temp; } \ZaE~
} else { qi_Jywd:w
data[k] = temp[j--]; D9z|VIw8
b = temp[j]; r#XT3qp$d
} ?M[ A7?
} ;VWAf;U;B
} fFc/ d(
Uw47LP
/** St e=&^
* @param data Y.*y9)#S6
* @param l /iX+R@
* @param i 0{=`on;
*/ ,T2G~^0
private void insertSort(int[] data, int start, int len) { *8LMn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7}X[ 4("bB
} 3D2E?$dX
} U~pV)J
} P>Ez'C
} J>\B`E
92EWIHEWZ
堆排序： Z?\2F%
p\bDY
package org.rut.util.algorithm.support; ~$~5qwl
p\<u6v ~J
import org.rut.util.algorithm.SortUtil; %"P,1&\^
Dc_yM
/** kXf'5p1
* @author treeroot 1PpyVf
* @since 2006-2-2 qzTuxo0B
* @version 1.0 )a-Du$kd
*/ "sG=wjcw^
public class HeapSort implements SortUtil.Sort{ E@ESl0a;
.FLy;_f+
/* (non-Javadoc) qTqwPWW*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rwI
*/ 5F~'gLH/F-
public void sort(int[] data) { ~-I+9F
MaxHeap h=new MaxHeap(); <kCU@SK
h.init(data); 3? HhG
for(int i=0;i h.remove(); UXdUO@
System.arraycopy(h.queue,1,data,0,data.length); h@[R6G|
} (2=Zm@Zpf
kO}AxeQ
private static class MaxHeap{ L|,!?cSAT
l?Ya"C`FL
void init(int[] data){ BW"5Aj
this.queue=new int[data.length+1]; C_7+a@?B
for(int i=0;i queue[++size]=data; 6b:tyQ
fixUp(size); sJDas,7>
} #Y4=J 6
} 1~PV[2a
~/P&Tub^
private int size=0; \ioH\9
`|/<\
private int[] queue; (Tbw3ENz
MgY0q?.S=
public int get() { @w?P7P<O`
return queue[1]; D}mjN=Y
} "OdXY"G
WS`qVL]^&
public void remove() { 'L8' '(eZ^
SortUtil.swap(queue,1,size--); R.yC(r
fixDown(1); i{`;R
} GgB,tam{p
file://fixdown ?W)A
private void fixDown(int k) { vMm1Z5S/
int j; lGOgN!?i
while ((j = k << 1) <= size) { Vb= Mg
if (j < size %26amp;%26amp; queue[j] j++; Wh.?j>vB
if (queue[k]>queue[j]) file://不用交换 |b)Y#)C;
break; WUh$^5W
SortUtil.swap(queue,j,k); h"/<?3{
k = j; Zd')57{
} 1#ft#-g}
} ^G.B+dG@`x
private void fixUp(int k) { P9vA7[
while (k > 1) { /%;mqrdk
int j = k >> 1; hX=A)73(
if (queue[j]>queue[k]) d&+h}O
break; cj1cZ-
SortUtil.swap(queue,j,k); ekWePL;rR2
k = j; f>N!wgo[
} CL+}|7O(
} #N`~xZ|$
*exS6@N]
} e8GEoD
K~| 4[\
} L{8xlx`
E6pMT^{K
SortUtil： 9T*v9d
FSA1gAW6g
package org.rut.util.algorithm; '7iSp=
)3>hhuaa
import org.rut.util.algorithm.support.BubbleSort; {qN 5MsY
import org.rut.util.algorithm.support.HeapSort; %'X[^W
import org.rut.util.algorithm.support.ImprovedMergeSort; D"a~#^
import org.rut.util.algorithm.support.ImprovedQuickSort; |\7 ET[Xq
import org.rut.util.algorithm.support.InsertSort; :>Ay^{vf=
import org.rut.util.algorithm.support.MergeSort; L2[f]J%
import org.rut.util.algorithm.support.QuickSort; %@6}GmK^
import org.rut.util.algorithm.support.SelectionSort; jW 3c"
import org.rut.util.algorithm.support.ShellSort; LILQ\I<<'
3GUZ;jdn
/** 3U7*>H
* @author treeroot T>NDSami
* @since 2006-2-2 j4^97
* @version 1.0 .8by"?**
*/ *tK\R&4,4s
public class SortUtil { 5) pj]S!]-
public final static int INSERT = 1; Z)SY.iK.
public final static int BUBBLE = 2; s]f6/x/~
public final static int SELECTION = 3; &2{tF
public final static int SHELL = 4; 0sfr d
public final static int QUICK = 5; Yi$vg
public final static int IMPROVED_QUICK = 6; BZ?.D_bu
public final static int MERGE = 7; #?/<
public final static int IMPROVED_MERGE = 8; ' <@3i[M
public final static int HEAP = 9; ;{KV /<3
Z|lqb=
public static void sort(int[] data) { |bO"_U
sort(data, IMPROVED_QUICK); f)^_|8
} 5 4L\Jx
private static String[] name={ ]zWon~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4X+ifZO
}; Y07ZB'K
'.81zpff
private static Sort[] impl=new Sort[]{ SAyufLEv,
new InsertSort(), V0P>YQq9s
new BubbleSort(), kNobl
new SelectionSort(), _s .G
new ShellSort(), v5QqS8u_C
new QuickSort(), 2AO~HxF
new ImprovedQuickSort(), JYW)uJ
new MergeSort(), .K p
new ImprovedMergeSort(), >8qQK r\"
new HeapSort() f7X6fr<
}; K otrX
,#L=v]
public static String toString(int algorithm){ 6er-{.L=
return name[algorithm-1]; &C"L
} Y]B)'[=h
WZ*ws[dVI
public static void sort(int[] data, int algorithm) { VCD:3U 8
impl[algorithm-1].sort(data); t3&LO~Ye
} 5*,f Fib
1ke g9]
public static interface Sort { LQngK7>
public void sort(int[] data); 8q,6}mV
} <cqbUL
A*}.EClH
public static void swap(int[] data, int i, int j) { Dk(1}%0U/
int temp = data; \kU &^Hi
data = data[j]; s#)5h0t#du
data[j] = temp; <7j87
} BA%pY|"Q
} --|Wh^i>?