[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; zcOm"-E-
} /IX555/dR1
int i1=l; )FA:wsy~E
int i2=mid+1; 6r%i=z
for(int cur=l;cur<=r;cur++){ i8cmT+}>
if(i1==mid+1) M $EHx[*5
data[cur]=temp[i2++]; }43qpJe8U
else if(i2>r) y fuH
data[cur]=temp[i1++]; 0[uOKFgE
else if(temp[i1] data[cur]=temp[i1++]; X$t!g`
else pfl^GgP#
data[cur]=temp[i2++]; C!v%6[
} cj2^wmkB
} 2}.~ 6EU/
w!d(NA<|0]
} <?;KF2A({
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改进后的归并排序: J5f}-W@
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package org.rut.util.algorithm.support; Y2ON!Rno
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import org.rut.util.algorithm.SortUtil; U: <
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/** &`]T#">
* @author treeroot ]gA2.,)}D
* @since 2006-2-2 [oXr6M:
* @version 1.0 NUh%\{
*/ %l%2 hvGZ
public class ImprovedMergeSort implements SortUtil.Sort { Crla~h?=
[%Z{Mp'g
private static final int THRESHOLD = 10; #?>pl.
SFEDR?s
/* KNF{NFk
* (non-Javadoc) Cnu])R
* NOAz"m+o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Oq}7q!H
*/ 64'sJc.
public void sort(int[] data) { X VH(zJ
int[] temp=new int[data.length]; cxPOO#
mergeSort(data,temp,0,data.length-1); f&Sovuuh
} d7Cs a c
uE%2kB*]
private void mergeSort(int[] data, int[] temp, int l, int r) { ;c@B+RquR
int i, j, k; !Ap*PL
int mid = (l + r) / 2; Iy4REP|
if (l == r) Cf v1nUW
return; \2Q#'
if ((mid - l) >= THRESHOLD) [*H h6
mergeSort(data, temp, l, mid); SapVS*yx@
else tC/+
insertSort(data, l, mid - l + 1); -2C^M> HZ
if ((r - mid) > THRESHOLD) zf\$T,t)
mergeSort(data, temp, mid + 1, r); 0@ vzQ$
else q03nu3uDI
insertSort(data, mid + 1, r - mid); &EC8{.7
y"_rDj`
for (i = l; i <= mid; i++) { p~-)6)We?
temp = data; $P #KL//
} M@pF[J/
for (j = 1; j <= r - mid; j++) { #!(2@N8
temp[r - j + 1] = data[j + mid]; J'wJe,
} zvv/|z2(r
int a = temp[l]; dL1{i,M
int b = temp[r]; ?'tFTh
for (i = l, j = r, k = l; k <= r; k++) { Ga <=Di):
if (a < b) { {s2eOL5I|%
data[k] = temp[i++]; Yic4|N?u
a = temp; _Qb].~
} else { BG1hk!
data[k] = temp[j--]; btDTC9O
b = temp[j]; a\p`J9Z@
} _~y-?(46K
} #A< |qd
} zUWWXC%R
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/** #1'p?%K.
* @param data T IyHM1+
* @param l &~=d;llkT
* @param i E6?0/"
*/ 3Z}KRsp3
private void insertSort(int[] data, int start, int len) { "2"2qZ*h}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HeHo?<>|d
} "'Q~&B;@
} r;"Qu
} (J j'kW6G6
} 8(!?y[
z;&J9r$`
堆排序： rFW,x_*_vP
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package org.rut.util.algorithm.support; i06|P I
aL8Z|*
import org.rut.util.algorithm.SortUtil; ]1q`N7
tSTl#xy
/** X09i+/ICK
* @author treeroot gjB(Pwx
* @since 2006-2-2 W;F=7[h
* @version 1.0 {w v{"*Q9Q
*/ [3v&j_
public class HeapSort implements SortUtil.Sort{ 5^N`~
.6iJ:A6T
/* (non-Javadoc) ?+byRoY>&g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2KNs,4X@
*/ 6 _#CvQ
public void sort(int[] data) { lQVK~8t3
MaxHeap h=new MaxHeap(); \IOF 9)F
h.init(data); |u[@g`Z
for(int i=0;i h.remove(); VB=jKMi
System.arraycopy(h.queue,1,data,0,data.length); Bdib)t[
} 6^z):d#u
+"VXw2R_e
private static class MaxHeap{ E$4Ik.k
KN.WTaO
void init(int[] data){ wHs4~"EY9
this.queue=new int[data.length+1]; oK2jPP
for(int i=0;i queue[++size]=data; HQc^ybX5
fixUp(size); M{X; H'2
} vZ|Wj] ;o
} is{H >#+"
t28 y=nv
private int size=0; TcH7!fUj
88zK)k{
private int[] queue; r@G34QC+
O?Qi
public int get() { H `_{n<
return queue[1]; if+97^Oy
} @.h;k4TD
`M ~-(,++
public void remove() { T{lK$j
SortUtil.swap(queue,1,size--); |N5|B Q(y$
fixDown(1); ifadnl26 s
} YDGW]T]i ?
file://fixdown x#'v}(v
private void fixDown(int k) { R7Z!
int j; Wtp;se@#
while ((j = k << 1) <= size) { P?<G:]W
if (j < size %26amp;%26amp; queue[j] j++; :\|<7n
if (queue[k]>queue[j]) file://不用交换 fh9w5hT={
break; 3:3>k8
SortUtil.swap(queue,j,k); =m?x5G^
k = j; !4T7@V`G
} 4l_~-Peh
} }i9VV+L#1
private void fixUp(int k) { /Hyi/D{W
while (k > 1) { }%S#d&wh$_
int j = k >> 1; jR^_1bu
if (queue[j]>queue[k]) p^ )iC&*0
break; w*gG1BV
SortUtil.swap(queue,j,k); +?GsIp@>jh
k = j; jJe?pT]o
} e0`5PVJ
} ;~n^/D2.
1oL3y;>iL
} X 3(*bj>P
c{})Z=
} />V& OX`
ulNMqz\.
SortUtil： NoT%z$1n
^NFL3v8
package org.rut.util.algorithm; <!derr-K
.c\iKc#
import org.rut.util.algorithm.support.BubbleSort; }EN-WDJD\
import org.rut.util.algorithm.support.HeapSort; k6(0:/C
import org.rut.util.algorithm.support.ImprovedMergeSort; 4ms"mIt
import org.rut.util.algorithm.support.ImprovedQuickSort; |L(h+/>aWX
import org.rut.util.algorithm.support.InsertSort; (E7C9U*
import org.rut.util.algorithm.support.MergeSort; qR9!DQc'
import org.rut.util.algorithm.support.QuickSort; r)[Xzn
import org.rut.util.algorithm.support.SelectionSort; #?7g_
import org.rut.util.algorithm.support.ShellSort; .:B;%*
1n~^@f#`
/** |eP5iy wg
* @author treeroot }hS$F
* @since 2006-2-2 !Mj28
* @version 1.0 yMJ(Sf
*/ MCl-er"]D
public class SortUtil { yhd]s0(!
public final static int INSERT = 1; z(1`Iy M
public final static int BUBBLE = 2; PyM59v
public final static int SELECTION = 3; =&WH9IKz
public final static int SHELL = 4; $ <Mf#.8%
public final static int QUICK = 5; %;b]k
public final static int IMPROVED_QUICK = 6; )&93YrHgC
public final static int MERGE = 7; D|IS@gWa
public final static int IMPROVED_MERGE = 8; - 9a4ej5
public final static int HEAP = 9; !JA//{?
%\Mc6
public static void sort(int[] data) { ^CP>|JWD^
sort(data, IMPROVED_QUICK); 5'n$aFqI
} TVAa/_y2`
private static String[] name={ m[s$)-T
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" o&>aYlXd
}; ?vQ:z{BO
!HKW_m^3J
private static Sort[] impl=new Sort[]{ OuyO_DSI
new InsertSort(), I6PReVIb
new BubbleSort(), j8;Uny9
new SelectionSort(), D_ XOYzN}
new ShellSort(), {2U3
new QuickSort(), kzC4V
new ImprovedQuickSort(), +QeA*L$~
new MergeSort(), 3 5/ s\
new ImprovedMergeSort(), -x-EU#.G
new HeapSort() 1wBmDEhS
}; NYc;Zwv9
"%#CMCE|f
public static String toString(int algorithm){ m|Sf'5fK
return name[algorithm-1]; HF*j=qt!
} \4>& zb4
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public static void sort(int[] data, int algorithm) { DSlO.)dHu
impl[algorithm-1].sort(data); (W?t'J^#
} Ru4M7%
1P WTbd l
public static interface Sort { <7`U1DR=
public void sort(int[] data); oj@=Cq':-
} ?%$~Bb _
-FW^fGS+
public static void swap(int[] data, int i, int j) { :KS"&h{SY
int temp = data; !\cVe;<r
data = data[j]; mSGpxZ,IE
data[j] = temp; ]d.e(yCuE
} nX8ulGGs
} Xh}G=1}