[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; LQnkcV
} 10#oG{9
int i1=l; VL' fP2
int i2=mid+1; R:p62c;Tv0
for(int cur=l;cur<=r;cur++){ '03->7V
if(i1==mid+1) %p&k5:4<"#
data[cur]=temp[i2++]; 8G>>i)Sbg
else if(i2>r) vpPl$ga5bY
data[cur]=temp[i1++]; 7u\*_mrv
else if(temp[i1] data[cur]=temp[i1++]; x\2?ym@
else $8l({:*q0
data[cur]=temp[i2++]; Wlh~)
} ~.%K/=wK@
} `V[!@b:
iut`7
} 5>J=YLq
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改进后的归并排序: c:83LZ
Y2o6kS{x
package org.rut.util.algorithm.support; /ug8]Lo0
c`x7u}C
import org.rut.util.algorithm.SortUtil; ?j^=u:<
]a2W e`
/** \.XLcz
* @author treeroot Q4t(@0e}
* @since 2006-2-2 8 i&_Jgmr
* @version 1.0 Y-ux7F{=z
*/ +.RKi!
public class ImprovedMergeSort implements SortUtil.Sort { ]4+s$rG
tweY'x.{
private static final int THRESHOLD = 10; .kTG[)F0b
1>Q{Gs^
/* b]E|*
* (non-Javadoc) ?)'~~@NkH
* 39{{7(hh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B7\k< Nit0
*/ OdMO=Hy6d
public void sort(int[] data) { ?Z\Yu'
int[] temp=new int[data.length]; (><zsLs&
mergeSort(data,temp,0,data.length-1); PiFD^w
} b'zR 9V
ZxGP/D
private void mergeSort(int[] data, int[] temp, int l, int r) { = sAn,ri
int i, j, k; p8wyEHB
int mid = (l + r) / 2; 2tayP@$
if (l == r) \b[9ebME
return; @eqeN9e
if ((mid - l) >= THRESHOLD) \U%#nU{
mergeSort(data, temp, l, mid); %iJ%{{f`
else (2?G:+C 7
insertSort(data, l, mid - l + 1); X5YiFLH>y\
if ((r - mid) > THRESHOLD) ch5s<x#CE
mergeSort(data, temp, mid + 1, r); HxK$4I`
else 8\<jyJ
insertSort(data, mid + 1, r - mid); p}Fs'l?7Rq
wix5B@
for (i = l; i <= mid; i++) { OT %nrzP
temp = data; 1Xy]D
} _DRrznaw
for (j = 1; j <= r - mid; j++) { BiE08,nj
temp[r - j + 1] = data[j + mid]; AvR2_
} _<ut)G^9
int a = temp[l]; DN4#H`
int b = temp[r]; %}2@rLP
for (i = l, j = r, k = l; k <= r; k++) { 4^6.~6a
if (a < b) { 7dihVvL $
data[k] = temp[i++]; Dc~,D1xWj
a = temp; 66snC{gU
} else { \EoX8b}$b0
data[k] = temp[j--]; [fu!AIQs
b = temp[j]; 3#wcKv%>&_
} df+t:a
} P`U<7xF~
} NV4g~+n
PIcrA2ll
/** 9ykM3
* @param data "s W-_j]
* @param l 3`9{T>
* @param i wHz?#MW 3L
*/ /EwGW
private void insertSort(int[] data, int start, int len) { {>0V[c[~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0f ER*.F
} F{k+7Ftc
} 4X NxI1w)
} b(GFMk
} Np)3+!^1"
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堆排序： jdevat,&u
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package org.rut.util.algorithm.support; $#o1MX
mxrG)n6Y
import org.rut.util.algorithm.SortUtil; vUQFQ
p]W+eT
/** 3l!NG=R
* @author treeroot 4dH}g~[P9
* @since 2006-2-2 8OWmzY_=
* @version 1.0 $awi>#[
*/ 1;u4X`8
public class HeapSort implements SortUtil.Sort{ _BnTv$.P
E]^5I3=O
/* (non-Javadoc) /I&wj^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (k-YI{D3
*/ jm>3bd
public void sort(int[] data) { Hr;h4J
MaxHeap h=new MaxHeap(); &UAe!{E0
h.init(data); lp&!lb`
for(int i=0;i h.remove(); h?@G$%2
System.arraycopy(h.queue,1,data,0,data.length); )tZ`K |
} .M|>u_<Qd
f<[jwhCWV
private static class MaxHeap{ i~=s^8n`l
l52a\/
void init(int[] data){ jStmS2n
this.queue=new int[data.length+1]; {}e^eJ
for(int i=0;i queue[++size]=data; !7H6i#g*
fixUp(size); zLjgCS<7
} g+q@i{Yn
} E|Bd>G
$]d*0^J 6
private int size=0; ^Uw[x\%#gD
p|6v~
private int[] queue; ~JZ3a0$^
l_FGZ!7
public int get() { a,'Cyv">
return queue[1]; <2Y0{ 8)
} Qb^q+C)o]
wN]J8Ir
public void remove() { ;M v~yb3v
SortUtil.swap(queue,1,size--); {'3D1#SK
fixDown(1); ,-*iCs<
} >POO-8Q
file://fixdown f~& a-
private void fixDown(int k) { u'9gVU B
int j; dK?);*w]
while ((j = k << 1) <= size) { &TN2 HZ-bJ
if (j < size %26amp;%26amp; queue[j] j++; B5=3r1Ly
if (queue[k]>queue[j]) file://不用交换 =(U/CI
break; K\=8eg93Z
SortUtil.swap(queue,j,k); J2Et-Cz1
k = j; Y'm=etE
} =v2%Vs\7k
} vx0UoKX
private void fixUp(int k) { go|>o5!g
while (k > 1) { cFfTYP9
int j = k >> 1; p]LnE`v
if (queue[j]>queue[k]) )y50Mb0+
break; &H;8QZ8uw
SortUtil.swap(queue,j,k); `bgb*Yaod
k = j; ;i)KHj'
} (}H ,ng'4
} @h-T:$
6TFo|z!C
} U^#?&u
U~is-+Uq
} Y5TS>iEE]
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SortUtil： 2bQ/0?.).-
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package org.rut.util.algorithm; W}gVIfe
lJ/6-dP
import org.rut.util.algorithm.support.BubbleSort; ~Yk"Hos
import org.rut.util.algorithm.support.HeapSort; +mWjBY
import org.rut.util.algorithm.support.ImprovedMergeSort; *re 44
import org.rut.util.algorithm.support.ImprovedQuickSort; 7c1+t_Ew
import org.rut.util.algorithm.support.InsertSort; F?*k}]Gi
import org.rut.util.algorithm.support.MergeSort; G\rj?%
import org.rut.util.algorithm.support.QuickSort; rZC3\,W
import org.rut.util.algorithm.support.SelectionSort; ;w6s<a@Zh
import org.rut.util.algorithm.support.ShellSort; d.}}s$Q
jn=ug42d
/** jPwef##~7
* @author treeroot Z.jCera.
* @since 2006-2-2 3ut_Bt\
* @version 1.0 WM< \e
*/ G.jQX'%4QG
public class SortUtil { t[O+B6
public final static int INSERT = 1; rc~Y=m
public final static int BUBBLE = 2; ,?=KgG1i
public final static int SELECTION = 3; E`E'<"{Yd
public final static int SHELL = 4; : ^(nj7D
public final static int QUICK = 5; *FPg#a+
public final static int IMPROVED_QUICK = 6; I)[B9rbe
public final static int MERGE = 7; !A-;NGxE
public final static int IMPROVED_MERGE = 8; QWhp:]}
public final static int HEAP = 9; oS!/|#mn
S:97B\u`
public static void sort(int[] data) { D0%FELG05
sort(data, IMPROVED_QUICK); 0VG=?dq
} )1z4q`
private static String[] name={ O)<r>vqe}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9".Uc8^p/F
}; 8&Wx@QI
:uR>UDlPX
private static Sort[] impl=new Sort[]{ ZQLB`n@
new InsertSort(), {5x>y:v
new BubbleSort(), Y@:3 B:m#
new SelectionSort(), m.146
new ShellSort(), m^0A?jBrR
new QuickSort(), Qv!rUiXq
new ImprovedQuickSort(), pGk"3.ce
new MergeSort(), 'wE\{1~_[+
new ImprovedMergeSort(), ]L]T>~X`
new HeapSort() |>JmS
}; 24|<<Xn
;$6x=uZ
public static String toString(int algorithm){ 5`yPT>*#m>
return name[algorithm-1]; }9}w8R~E
} N[ Q#R~Hn<
.HOY q
public static void sort(int[] data, int algorithm) { BD4"pcr
impl[algorithm-1].sort(data); MgP{W=h2
} 0~i qG
TQ~&Y)".
public static interface Sort { ,lP7 ri
public void sort(int[] data); #Y: ~UVV
} Ph"iX'J
3:O+GQ*
public static void swap(int[] data, int i, int j) { W:>J864!
int temp = data; mS7E_A8
data = data[j]; wy\o*P9mG)
data[j] = temp; z@n+7p`w
} Sgx+V"bkT
} wLSjXpP8