[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; ydBoZ3}
} &?x^I{j
int i1=l; Inr ~9hz
int i2=mid+1; v6iV#yz3(
for(int cur=l;cur<=r;cur++){ 'e0qdY`
if(i1==mid+1) Mc{1Cdj
data[cur]=temp[i2++]; Th@L68
else if(i2>r) yzXwxi1#
data[cur]=temp[i1++]; l=kgRh
else if(temp[i1] data[cur]=temp[i1++]; eZf-i1lJ
else z07!i@ue~
data[cur]=temp[i2++]; !dmI}<@&k
} 1{"e'[L
} Lw-)ijBW
LkJ3 :3O
} b7HS3NYk
IDcu#Nz`
改进后的归并排序: (swP#t5S
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package org.rut.util.algorithm.support; JTdK\A>l
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import org.rut.util.algorithm.SortUtil; "i9$w\lm
{T=I~#LjMI
/** wGw}a[a
* @author treeroot F4d L{0;j
* @since 2006-2-2 O4( Z%YBe
* @version 1.0 tt#M4n@
*/ g_.BJ>Uv
public class ImprovedMergeSort implements SortUtil.Sort { Cm>8r5LG
U<o,`y[Tn
private static final int THRESHOLD = 10; UPLr[>Q#
wgI$'tI
/* ~/ "aD
* (non-Javadoc) KWU#Swa`
* 6\'v_A O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5P+3D{
*/ V .$<
public void sort(int[] data) { ~I2IgEj>]
int[] temp=new int[data.length]; bCc^)o/w
mergeSort(data,temp,0,data.length-1); QNn$`Qz.
} S1zV.]
1\_4# @')
private void mergeSort(int[] data, int[] temp, int l, int r) { 4uDz=B+8y
int i, j, k; c1e7h l
int mid = (l + r) / 2; U =T[-(:H
if (l == r) W0l|E&fj[
return; jr'O4bo%
if ((mid - l) >= THRESHOLD) ^d-`?zb
mergeSort(data, temp, l, mid); >.~^(
else Ujb||(W
insertSort(data, l, mid - l + 1); jG8ihi
if ((r - mid) > THRESHOLD) 5LXK#+Z
mergeSort(data, temp, mid + 1, r); C{+~x@
else Mx[tE?!2
insertSort(data, mid + 1, r - mid); 7?/ Fr(\
vhdT"7`U
for (i = l; i <= mid; i++) { 8h-6;x^^
temp = data; BDc*N]m}B1
} f+J<sk
for (j = 1; j <= r - mid; j++) { ;V`~'357%
temp[r - j + 1] = data[j + mid]; C %y AMQ
} OfY>~d
int a = temp[l]; N',]WZ}
int b = temp[r]; Gz$DsaG
for (i = l, j = r, k = l; k <= r; k++) { eH79,!=2
if (a < b) { %xkqiI3Ff
data[k] = temp[i++]; P4ot,Q4
a = temp; x@(91f
} else { SIzW3y[
data[k] = temp[j--]; 8V^gOUF.
b = temp[j]; ejD;lvf
} En-eG37l
} =DvnfT<
} qDNqd
Vh4z+JOC
/** sR'rY[^/|
* @param data 0M-Zp[w\-
* @param l X~%Wg*Hm
* @param i 0 UjT<t^F
*/ &c?-z}=G
private void insertSort(int[] data, int start, int len) { \MX>=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HrWXPac A
} 3mpEF<z
} Fg`r:,(a
} GfPe0&h
} Ku56TH!Py
&2#<6=}
堆排序： Kx$?IxZ
(m~MyT#S
package org.rut.util.algorithm.support; +X"TiA7{j
6e/2X<O
import org.rut.util.algorithm.SortUtil; ~@MIG
[Gysx
/** BX2&tQSp
* @author treeroot ;sCX_`t0E
* @since 2006-2-2 Cm(Hu
* @version 1.0 y! 7;Z~"
*/ P[aB}<1f0
public class HeapSort implements SortUtil.Sort{ Vad(PS0
.KTDQA\
/* (non-Javadoc) 9akCvY#Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) );7csh%
*/ )xlNj$(x5n
public void sort(int[] data) { c"77<Db$
MaxHeap h=new MaxHeap(); a{el1_DIGK
h.init(data); +#,t
for(int i=0;i h.remove(); auaFP-$`f
System.arraycopy(h.queue,1,data,0,data.length); ~\Fde^1
} &I<R|a
2mVH*\D
private static class MaxHeap{ i#iY;R8
)6^b\`
void init(int[] data){ Su6ZO'[)
this.queue=new int[data.length+1]; v #IC
for(int i=0;i queue[++size]=data; ke'p8Gz
fixUp(size); VqbMFr<k
} 9{?<.%
} 24>{T5E
j?3J-}XC
private int size=0; L&q~5 9
ps_CQh0
private int[] queue; ib*$3Fn~
5"]PwC
public int get() { ~+V]MT
return queue[1]; SL>>]A,E<`
} >c8zMd
VBBqoyP h
public void remove() { "?}QwtUW
SortUtil.swap(queue,1,size--); GVCyVt[!-
fixDown(1); l?Bv9k.^?
} 3eFD[c%mN
file://fixdown ir3iW*5k
private void fixDown(int k) { Jel%1'Dc^
int j; 1h"0B
while ((j = k << 1) <= size) { m-7^$
if (j < size %26amp;%26amp; queue[j] j++; VS1gg4tCv
if (queue[k]>queue[j]) file://不用交换 z| i$eF;x3
break; HC+(FymV
SortUtil.swap(queue,j,k); $BkdC'D
k = j; ,dK%[
} ezC55nm
} eNi.d;8F
private void fixUp(int k) { %ktU 51o
while (k > 1) { Y')in7g
int j = k >> 1; ukzXQe;l1
if (queue[j]>queue[k]) _av%`bb&z9
break; x]Q+M2g?
SortUtil.swap(queue,j,k); }us%G&A2u
k = j; _dIv{L!
} _H<ur?G
} -Y2h vC
'R,1Jmx
} Hg*6I%D[So
xGPt5l<M&
} V?0|#=_mE
3QM.X^ANH
SortUtil： / QSK$ZDC
3[-L'!pOX3
package org.rut.util.algorithm; ?v8B;="#w
VL7zU->
import org.rut.util.algorithm.support.BubbleSort; OfbM]:}<3
import org.rut.util.algorithm.support.HeapSort; u L/*,[}'
import org.rut.util.algorithm.support.ImprovedMergeSort; on\0i{0l8
import org.rut.util.algorithm.support.ImprovedQuickSort; ZWh:&e(
import org.rut.util.algorithm.support.InsertSort; a~:'OW:Q
import org.rut.util.algorithm.support.MergeSort; H:a(&Zb
import org.rut.util.algorithm.support.QuickSort; vEW;~FLd
import org.rut.util.algorithm.support.SelectionSort; {SCwi;m
import org.rut.util.algorithm.support.ShellSort; D{PO!WzW
u`R
/** _lu.@IX-
* @author treeroot GriL< =?t
* @since 2006-2-2 `cMa Fc-y/
* @version 1.0 ^A;v|U
*/ +8mfq\Y1
public class SortUtil { )u(`s`zd
public final static int INSERT = 1; HVh+Zk
public final static int BUBBLE = 2; mY |$=n5X
public final static int SELECTION = 3; ~,m6g&>R
public final static int SHELL = 4; %(,JBa:G
public final static int QUICK = 5; Z\4l+.R`
public final static int IMPROVED_QUICK = 6; E.}T.St
public final static int MERGE = 7; 6*tI~
public final static int IMPROVED_MERGE = 8; \62|w HX
public final static int HEAP = 9; "72 _Sw
^#vWdOlt
public static void sort(int[] data) { C(xdiQJh
sort(data, IMPROVED_QUICK); Qm^N}>e
} ERCW5b[RT
private static String[] name={ lHT?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" li$(oA2
}; G'#a&6
CQ"5bnR
private static Sort[] impl=new Sort[]{ drNfFx2
new InsertSort(), [gqV}Y"Md
new BubbleSort(), <eQS16
new SelectionSort(), !xA;(<K[^
new ShellSort(), @]gP"Pp
new QuickSort(), !C&}e8M|eX
new ImprovedQuickSort(), 7o'kdYJzo
new MergeSort(), G0xk @SE
new ImprovedMergeSort(), FgKDk!ci
new HeapSort() p/4GOU5g
}; u2@:[:Ao
-YJ7ne]
public static String toString(int algorithm){ 4B^f"6'
return name[algorithm-1]; 5 ,quM"
} gdNEMT
> ~J&i3
public static void sort(int[] data, int algorithm) { "N D1$l
impl[algorithm-1].sort(data); vsRn\Y
} _~-VH&g0R
P9SyQbcK
public static interface Sort { 5ju\!Re3X
public void sort(int[] data); =Pd3SC})6V
} |J?KHI
[8l8m6
public static void swap(int[] data, int i, int j) { vRVQ:fw
int temp = data; H+;>>|+:~
data = data[j]; #q6jE
data[j] = temp; _ ?xORzO
} ?R#-gvX%
} R*'rg-d