[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; ;3\'}2^|l
} 8xt8kf*k
int i1=l; 4jw q$G
int i2=mid+1; _/NPXDL
for(int cur=l;cur<=r;cur++){ c{3P|O&.
if(i1==mid+1) U.Fs9F4M#
data[cur]=temp[i2++]; F*JbTEOn
else if(i2>r) jGUegeq
data[cur]=temp[i1++]; b=kY9!GN,v
else if(temp[i1] data[cur]=temp[i1++]; L>n^Q:M
else %RIlu[J
data[cur]=temp[i2++]; Rxq4Diq5k
} gbu*6&j9
} q\/xx`L
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} mYFc53B
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改进后的归并排序: ~cf)wrP
K?u:-QX^
package org.rut.util.algorithm.support; Ie}7#>S
sitgz)Ki^
import org.rut.util.algorithm.SortUtil; rrSFmhQUk
^[VEr"X
/** t9r R>Y9
* @author treeroot r2\}_pIj
* @since 2006-2-2 Z~K} @
* @version 1.0 EY@KWs3"H
*/ Q2'`K|T
public class ImprovedMergeSort implements SortUtil.Sort { /jSb^1\
~m4LL[
private static final int THRESHOLD = 10; *rVI[kL
{S`Rr/E|%
/* N}Or+:"O:q
* (non-Javadoc) nK`H;k
* 5O~;^0iC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d*$x|B|V
*/ @QDUz>_y
public void sort(int[] data) { SC--jhDZ
int[] temp=new int[data.length]; >#y1(\e
mergeSort(data,temp,0,data.length-1); W~5gTiBZ]
} ab[V->>%
0x# V
private void mergeSort(int[] data, int[] temp, int l, int r) { s >k4G
int i, j, k; %reW/;)l{
int mid = (l + r) / 2; ~FVbL-2
if (l == r) L+Gi
return; r-Oz k$
if ((mid - l) >= THRESHOLD) A:\_ \B%<
mergeSort(data, temp, l, mid); bYYjP.rcF
else s>=$E~qq
insertSort(data, l, mid - l + 1); f[q_eY
if ((r - mid) > THRESHOLD) gX(8V*os^
mergeSort(data, temp, mid + 1, r); x[R?hS,0t
else r;O?`~2'4
insertSort(data, mid + 1, r - mid); M"foP@
Mo]iVj8~
for (i = l; i <= mid; i++) { P0rdGf 5T
temp = data; *-'`Ea
} oJZ0{^
for (j = 1; j <= r - mid; j++) { 0ke1KKy/d
temp[r - j + 1] = data[j + mid]; O]l-4X#8F
} uN0'n}c;1.
int a = temp[l]; ~Fo`Pr_
int b = temp[r]; @"iNjqxh
for (i = l, j = r, k = l; k <= r; k++) { _I%mY!x\`
if (a < b) { #2+hu^Q-
data[k] = temp[i++]; 3*R(&O6}
a = temp; +B7UGI
} else { =H"%{VeC5
data[k] = temp[j--]; &VxK AQMxN
b = temp[j]; 2|`~3B)#
} KF7d`bRe
} PAiVUGp5[
} LNvkC4
:~p_(rE
/** 6wb M$|yFj
* @param data nTsPX Tat
* @param l 3]>YBbXvE
* @param i }'\M}YM
*/ E8o9ufj3
private void insertSort(int[] data, int start, int len) { Y3xEFqMU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8g/r8u~
} R!WeSgKCs
} cSj(u%9}
} SNV;s,
} mN#&NA
K4^B~0~
堆排序： ?hW(5]p|
'=IuwCB|;
package org.rut.util.algorithm.support; (; Zl
ltd'"J/r
import org.rut.util.algorithm.SortUtil; iz-O~T/^
)Y?E$=M+B
/** ;8gODj:dO
* @author treeroot b{W ,wn
* @since 2006-2-2 7.C]ZcU
* @version 1.0 &0mhO+g
*/ *gI9CVfQl
public class HeapSort implements SortUtil.Sort{ 5JZZvc$au
[ HjGdC
/* (non-Javadoc) =IIE]<z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'eoI~*}3WQ
*/ YC}$O2
public void sort(int[] data) { v=H!Y";
MaxHeap h=new MaxHeap(); 6:\z8fYD
h.init(data); ^9kdd[
for(int i=0;i h.remove(); t*Wxvoxk
System.arraycopy(h.queue,1,data,0,data.length); b$FXRR\G
} F,XJGD*
9a.[>4}
private static class MaxHeap{ td+[Na0d
1z[blNs&
void init(int[] data){ tQ4{:WPG
this.queue=new int[data.length+1]; ,I[A~
for(int i=0;i queue[++size]=data; 8\Eq(o}7
fixUp(size); 7M9s}b%?
} 3*b!]^d:D
} &S#bLE
3K_!:[
private int size=0; J~G"D-l<9/
+z\O"zlj
private int[] queue; .]Z,O>N
$E@ke:
public int get() { o6 [i0S
return queue[1]; ;Y16I#?;Kh
} t,;b*ZR
jdVdz,Y
public void remove() { j! cB
SortUtil.swap(queue,1,size--); wmPpE_{
fixDown(1); JGk,u6K7
} )^'wcBod,
file://fixdown 9a_(_g>S
private void fixDown(int k) { /t?(IcP5
int j; =j~}];I
while ((j = k << 1) <= size) { or]s
if (j < size %26amp;%26amp; queue[j] j++; 6UJBE<ntj
if (queue[k]>queue[j]) file://不用交换 4HDQj]z/
break; dzMI5fA<_
SortUtil.swap(queue,j,k); 4^B:Q9B)
k = j; B6vmBmN
} G,i%:my7
} gM3gc;
private void fixUp(int k) { LvS3c9|Aj
while (k > 1) { =;xlmndT,
int j = k >> 1; ; bDFrG
if (queue[j]>queue[k]) ? 5 V-D8k
break; `24:Eg6r
SortUtil.swap(queue,j,k); N,_ej@L8
k = j; yc5n
} -.WVuc`
} `+/[0B=.
h Tn^:%(
} )O%lh 8fI
9uREbip
} u]cnbm
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SortUtil： s^{j
Jq`fD~(7
package org.rut.util.algorithm; Qi7^z;
J0|}u1?l
import org.rut.util.algorithm.support.BubbleSort; wGQ{
import org.rut.util.algorithm.support.HeapSort; Dl/_jM
import org.rut.util.algorithm.support.ImprovedMergeSort; XT_BiZ%l5O
import org.rut.util.algorithm.support.ImprovedQuickSort; ?8C+wW
import org.rut.util.algorithm.support.InsertSort; M !OI :v
import org.rut.util.algorithm.support.MergeSort; _.06^5o
import org.rut.util.algorithm.support.QuickSort; F]?$Q'U
import org.rut.util.algorithm.support.SelectionSort; w }2|Do$5
import org.rut.util.algorithm.support.ShellSort; T}]Ao
(A&@ <
/** 0KT{K(
* @author treeroot c\4n7m,y
* @since 2006-2-2 iVu+ct-iv
* @version 1.0 z?"5="D
*/ JT^E`<nn
public class SortUtil { r5iO%JFg
public final static int INSERT = 1; @#H{nj Z
public final static int BUBBLE = 2; 0I?3@Nz6
public final static int SELECTION = 3; a\m10Ih:
public final static int SHELL = 4; 25ZGuM
public final static int QUICK = 5; Da-(D<[0
public final static int IMPROVED_QUICK = 6; *Ucyxpu~$
public final static int MERGE = 7; ::T<de7
public final static int IMPROVED_MERGE = 8; 6eK^T=
public final static int HEAP = 9; e#HP+b$
[Iihk5TT
public static void sort(int[] data) { 3Yj}ra}
sort(data, IMPROVED_QUICK); |PJW2PN
} D#t5*bwK
private static String[] name={ ^Q:K$!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HIa$0g0J
}; Em"X5>;4
'/ &"
private static Sort[] impl=new Sort[]{ :M[E-j;
new InsertSort(), Z%OSW
new BubbleSort(), >;3c;nf
new SelectionSort(), 4QZy-a*tA
new ShellSort(), B?%D
new QuickSort(), }lb.3fqiA
new ImprovedQuickSort(), #Aanv
new MergeSort(), 0~1P&Qs<
new ImprovedMergeSort(), VDmd+bvJV
new HeapSort() c\b>4 &n
}; eu:_V+
;W*$<~_
public static String toString(int algorithm){ E0DEFB
return name[algorithm-1]; eXaDx%mM
} Rt:PW}rFf
GKd>AP_
public static void sort(int[] data, int algorithm) { 6~/H#8Kdn
impl[algorithm-1].sort(data); }b^lg&$(
} ^c7L!F
]Ojt3)fB
public static interface Sort { sk3;;<H
public void sort(int[] data); Hf-F-~E
} %ej"ZeM
BmJ?VJ}Y
public static void swap(int[] data, int i, int j) { r#}Sy\
int temp = data; uU\iji\
data = data[j]; T?ZMmUE
data[j] = temp; 6e*b;{d
} /(0d{
} E37@BfpO3