[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; g5|\G%dOt
} h8-tbHgpb
int i1=l; ;F(01
int i2=mid+1; P"~T*Qq-R
for(int cur=l;cur<=r;cur++){ g)D}p@>m
if(i1==mid+1) I64:-P[\
data[cur]=temp[i2++]; #:zPpMAl
else if(i2>r) \fR:+rbQ&|
data[cur]=temp[i1++]; f EiEfu
else if(temp[i1] data[cur]=temp[i1++]; +;iesULXn
else :(p rx
data[cur]=temp[i2++]; \q1%d.\X
} zPkPC}f(O
} fvM3.P
}R5&[hxh4t
} Odtck9L
`6sQlCOnF
改进后的归并排序: %R"/`N9R,
yaYt/?|
package org.rut.util.algorithm.support; q.QYn.CBZz
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import org.rut.util.algorithm.SortUtil; GO3YXO33
HPdwx V
/** y8S6ZtA}2
* @author treeroot q<uLBaL_]r
* @since 2006-2-2 &&S4x
* @version 1.0 eRy'N|'
*/ GWZXRUc
public class ImprovedMergeSort implements SortUtil.Sort { ^k<$N
BF[?* b
private static final int THRESHOLD = 10; S|4/C
~%K(ou=2
/* % P)}(e6y
* (non-Javadoc) |M>k &p,B-
* 4H?Ma|,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CPeK0(7Zh
*/ HU+H0S~g
public void sort(int[] data) { _rJSkZO
int[] temp=new int[data.length]; Z_~DTO2Qg
mergeSort(data,temp,0,data.length-1); gj;G:;1m
} !jq6cND
#R~NR8(z
private void mergeSort(int[] data, int[] temp, int l, int r) { k$_]b0D{4
int i, j, k; TC#B^m`'p
int mid = (l + r) / 2; 2U+p@}cQUA
if (l == r) B"zg85 e
return; 3 v$4LY
if ((mid - l) >= THRESHOLD) #}yFHM?i
mergeSort(data, temp, l, mid); 7 ~8Fs@
else %9Fg1LH42r
insertSort(data, l, mid - l + 1); =e/4Gs0*
if ((r - mid) > THRESHOLD) 0U*"OSpF
mergeSort(data, temp, mid + 1, r); PQ1NQy8
else bK1`a{
insertSort(data, mid + 1, r - mid); \bSHBTK
V=MZOj6
for (i = l; i <= mid; i++) { =I}V PxhE7
temp = data; p&l:937
} ]qHO{b4k
for (j = 1; j <= r - mid; j++) { deY<+!
temp[r - j + 1] = data[j + mid]; 2A ,36,
} BVp.A]
int a = temp[l]; O;?~#E<6w
int b = temp[r]; IfCqezd
for (i = l, j = r, k = l; k <= r; k++) { 6l7a9IJ
if (a < b) { <!>}t a
data[k] = temp[i++]; %~2m$#)
a = temp; d`7] reh
} else { 8E%*o
data[k] = temp[j--]; 'Pu;]sC
b = temp[j]; |YFlJ2w
} uhLmyK
} bC-x`a@
} 2Hwf:S'
Tou~U[V+
/** hI{Yg$H1
* @param data UQPE)G
* @param l Oh4WYDyT
* @param i F[Sat;Sll
*/ 7Z3qaXPH
private void insertSort(int[] data, int start, int len) { :|3C-+[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c?",kzo
} }TvAjLIS6
} QLG,r^
} hDMp^^$
} =oDrN7`,B
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堆排序： -h`0v
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package org.rut.util.algorithm.support; >E=a~ O
O8o18m8UH
import org.rut.util.algorithm.SortUtil; &W!@3O{~.
a<.@+sj{
/** iNSJOS
* @author treeroot V'/%)oU\"
* @since 2006-2-2 kyB]fmS
* @version 1.0 a$:N9&P
*/ c'R|Wyf
public class HeapSort implements SortUtil.Sort{ xII!2.
]XyJ7esg
/* (non-Javadoc) i`L66uV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {rLOAewr
*/ ;A!i V|
public void sort(int[] data) { *2;3~8Y
MaxHeap h=new MaxHeap(); L 3@wdC~0
h.init(data); c= uORt>
for(int i=0;i h.remove(); heA\6W:u&
System.arraycopy(h.queue,1,data,0,data.length); jqedHnx
} a!]%@A6p
7yl'!uz)9
private static class MaxHeap{ 92Iv'(1ba
blv6
void init(int[] data){ f}eVfAf
this.queue=new int[data.length+1]; 5GkM7Zu!{j
for(int i=0;i queue[++size]=data; kGP?Jx\PkH
fixUp(size); 6suc:rp";
} 7Y:s6R|
} $@;[K\
IRa*}MJe
private int size=0; W0kq>s4
8<!9mgh
private int[] queue; UUq9UV-h
yr'`~[oSCy
public int get() { kq-RM#Dj:
return queue[1]; E@KK\m \e
} amgex$
N0C5FSH
public void remove() { rC16?RovQ@
SortUtil.swap(queue,1,size--); -X \vB
fixDown(1); ]du~V?N
} i,T{SV
file://fixdown zu%pr95U
private void fixDown(int k) { dM$S|,H
int j; &tIm
while ((j = k << 1) <= size) { r%i{a
if (j < size %26amp;%26amp; queue[j] j++; eSU8/9B
if (queue[k]>queue[j]) file://不用交换 n3\vq3^?
break; QCw<* Id+
SortUtil.swap(queue,j,k); WAbhBA
k = j; l1S1CS
} K<tg+(3
} JnDR(s4(E
private void fixUp(int k) { add-]2`
while (k > 1) { CjGI}t
int j = k >> 1; A )cb
if (queue[j]>queue[k]) HZ3<}`P_W
break; i1C'
SortUtil.swap(queue,j,k); <0m;|Ai'W
k = j; R?Qou!*]
} w=$_',5#Z
} O"Q=66.CR
[geY:v_B
} CiSG=obw
F/Xhm91^
} w[&BY
-=w.tJD
SortUtil： we9AB_y
JiR|+6"7
package org.rut.util.algorithm; l?;S>s*\?
5Fl|=G+3@g
import org.rut.util.algorithm.support.BubbleSort; C#R9Hlb
import org.rut.util.algorithm.support.HeapSort; hCgNS1%4
import org.rut.util.algorithm.support.ImprovedMergeSort; \+\h<D-5
import org.rut.util.algorithm.support.ImprovedQuickSort; B|&<
import org.rut.util.algorithm.support.InsertSort; pifgt
import org.rut.util.algorithm.support.MergeSort; P}jr 8Z
import org.rut.util.algorithm.support.QuickSort; |Th{*IJ<,
import org.rut.util.algorithm.support.SelectionSort; ~nQb;Bdh%
import org.rut.util.algorithm.support.ShellSort; ra1hdf0"
W=*\4B]
/** ^BZdR<;
* @author treeroot ;1nd~0o
* @since 2006-2-2 q,GL#L
* @version 1.0 )r~Oj3TH
*/ OsXQWSkj~
public class SortUtil { ;z68`P-
public final static int INSERT = 1; =3'wHl
public final static int BUBBLE = 2; _u0dt) $
public final static int SELECTION = 3; ~xCy(dL^}
public final static int SHELL = 4; fu/c)D6u*m
public final static int QUICK = 5; w#XJ!f6*_9
public final static int IMPROVED_QUICK = 6; XV&3h>5
public final static int MERGE = 7; cW RY[{v
public final static int IMPROVED_MERGE = 8; 2-4%h!
public final static int HEAP = 9; oaHBz_pg
~EBZlTN
public static void sort(int[] data) { *K;~V
sort(data, IMPROVED_QUICK); 2+.m44>Ti
} z!%}0
private static String[] name={ e#wn;wo?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $f+9svq
}; ":Q^/;D}U
<bH>\@p7}
private static Sort[] impl=new Sort[]{ Z&%61jGK
new InsertSort(), 3-05y!vbcE
new BubbleSort(), +vP1DXtj(
new SelectionSort(), w%ForDB>P
new ShellSort(), D+V^nCcx%
new QuickSort(), 8Y9mB#X
new ImprovedQuickSort(), 7"NUof?i
new MergeSort(), ^6`U0|5mRX
new ImprovedMergeSort(), Z8x(_ft5
new HeapSort() ll#PCgIm
}; iAN#TCwLT7
Buo1o&&
public static String toString(int algorithm){ L4!$bB~L-
return name[algorithm-1]; 7;XdTx
} _AFgx8
7Q`4*H6
public static void sort(int[] data, int algorithm) { wcO+P7g
impl[algorithm-1].sort(data); ,Y*f]
} &^EkM
X7G6y|4;w
public static interface Sort { [#_ceg1G
public void sort(int[] data); 2eNm2;
} 7G/"!ePW6`
pO^ 6p%
public static void swap(int[] data, int i, int j) { (<ejJPWT
int temp = data; vq{:=:5'P
data = data[j]; ,FTF@h-Cs
data[j] = temp; */1z=
} &~j"3G;e
} U+K_eEI0_I