[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; $A;%p6PO)
} F%tV^$%
int i1=l; )yt_i'D}
int i2=mid+1; (Qcd !!
for(int cur=l;cur<=r;cur++){ # E{2 !Z
if(i1==mid+1) yp!7^
data[cur]=temp[i2++]; A/c#2
else if(i2>r) )Ggv_mc h
data[cur]=temp[i1++]; Pxvf"SXX
else if(temp[i1] data[cur]=temp[i1++]; ZamOYkRX
else N;q)[Dr
data[cur]=temp[i2++]; B{lj.S`mB
} Iysp)
} c<a)Yqf"]
`6:B0-r
} {zTnE?(o`
z}a9%Fb
改进后的归并排序: fjd)/Gg
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package org.rut.util.algorithm.support; 0g`$Dap
p>l:^-N;f
import org.rut.util.algorithm.SortUtil; i,B<k 0W9
:Dj0W8V
/** S?[@/35)
* @author treeroot 7C9_;81_Dt
* @since 2006-2-2 @Cml^v@`L
* @version 1.0 L"tzUYxg
*/ zMXQfR
public class ImprovedMergeSort implements SortUtil.Sort { |[Rlg`TQ;*
SaIY-PC
private static final int THRESHOLD = 10; |E9'ii&?B
^)UX#D3b
/* 6Vj=SYK
* (non-Javadoc) @GWJq 3e
* g.*DlD%%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M5kw3Jy5
*/ CUN1.i<pk8
public void sort(int[] data) { .]e_je_
int[] temp=new int[data.length]; )`BKEaf
mergeSort(data,temp,0,data.length-1); p/U{*i]t
} ~Z~V:~
4D}hYk$eP0
private void mergeSort(int[] data, int[] temp, int l, int r) { f#kT?!sP
int i, j, k; !<3!ORFO
int mid = (l + r) / 2; 0Lf4^9N
if (l == r) Am!OLGG4
return; U38~m}c
if ((mid - l) >= THRESHOLD) :Y Ki
mergeSort(data, temp, l, mid); +# 3e<+!F
else '.wb= C
insertSort(data, l, mid - l + 1); q-s(2C
if ((r - mid) > THRESHOLD) `=$p!H8
mergeSort(data, temp, mid + 1, r); i IM\_<?
else ek"Uq RY
insertSort(data, mid + 1, r - mid); L|L;<
aka)#0l .
for (i = l; i <= mid; i++) { h343$,))u
temp = data; 2FcNzAaV
} brX[-
for (j = 1; j <= r - mid; j++) { 5ZX
temp[r - j + 1] = data[j + mid]; +BVY9U?\"
} E/zclD5S
int a = temp[l]; 6f:uAFwG
int b = temp[r]; );zLgNx,
for (i = l, j = r, k = l; k <= r; k++) { \10KIAQ
if (a < b) { Z(XohWe2
data[k] = temp[i++]; 3 "iBcsLn
a = temp; "AP$)xM-:
} else { )Dp0swJ
data[k] = temp[j--]; ^IKT!"J&?
b = temp[j]; edo+ o{^
} nMK$&h,{
} k1.%ZZMM
} Z2t\4|wr:
f`)*bx
/** #W&o]FAA3y
* @param data O7CW#F
* @param l *M)M!jTv
* @param i }K5okxio
*/ 6e8 gFQ"w2
private void insertSort(int[] data, int start, int len) { .DI?-=p|_#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); osl\j]U8
} 2qot(Zs1i
} K3Bw3j 9
} d%UzQ*s
} Bf.iRh0Q5
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堆排序： ve+bR
r1TdjnP,2^
package org.rut.util.algorithm.support; H,c`=Ii3
mPhu#oK'f
import org.rut.util.algorithm.SortUtil; o*Xfgc
9Z21|5
/** JA*+F1s
* @author treeroot 0'HQ=pP
* @since 2006-2-2 ah%Ws#&
* @version 1.0 <DP8a<{{
*/ $ x:N/mMu`
public class HeapSort implements SortUtil.Sort{ QWnGolN
)Gm9x]SVl
/* (non-Javadoc) 19U&4Jk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i)'tt9f$
*/ ;?k<L\zaw
public void sort(int[] data) { e=l:!E10
MaxHeap h=new MaxHeap(); 'zbvg0T
h.init(data); BN `2UVH
for(int i=0;i h.remove(); ;*$e8y2
System.arraycopy(h.queue,1,data,0,data.length); Jt[,V*:#
} LRg]'?
v3aPHf
private static class MaxHeap{ DR{O.TX
3@qv[yOE
void init(int[] data){ op\$(7<d-
this.queue=new int[data.length+1]; qY$ [2]
for(int i=0;i queue[++size]=data; NYr)=&)Ke.
fixUp(size); *FktI\tS
} EK5$z>k>m
} 0>8w On
B;?)X&n|X
private int size=0; /y$Fw9R;
b*.aaOb
private int[] queue; 6UqAs<c9
vJaWHC$q
public int get() { h=0a9vIXF
return queue[1]; P%)r4+at
} 6Iqy"MQuq
pr,,E[
public void remove() { )AxD|A
SortUtil.swap(queue,1,size--); I/XSW#
fixDown(1); @ ?M\[qeF@
} Q#G xo
file://fixdown 'Y#'ozSQv
private void fixDown(int k) { m$_b\^we
int j; J_h.7V
while ((j = k << 1) <= size) { ol*,&C:{
if (j < size %26amp;%26amp; queue[j] j++; D;NL*4zt
if (queue[k]>queue[j]) file://不用交换 F3EAjO)ch
break; Uns%6o
SortUtil.swap(queue,j,k); j<P;:
k = j; e.skE>&
} |$b8(g$s)
} y]0O"X-G
private void fixUp(int k) { x};~8lGT>t
while (k > 1) { 4"k&9+>
int j = k >> 1; ~f(5l.
if (queue[j]>queue[k]) /wLGf]0
break; 4U\}"Mk
SortUtil.swap(queue,j,k); =aZ d>{Y
k = j; @<{%r
} B=r DU$z
} ^hiY6N &
Jz~:
} !9WGZfK+0Y
gK QJ^a\!
} >]pZ;e$
|67Jw2
SortUtil： mLqqo2u
zQ|2D*W
package org.rut.util.algorithm; [9${4=Kq
J?w_DQa
import org.rut.util.algorithm.support.BubbleSort; XZ~kXE;B(
import org.rut.util.algorithm.support.HeapSort; .Pponmy
import org.rut.util.algorithm.support.ImprovedMergeSort; Ba@~:
import org.rut.util.algorithm.support.ImprovedQuickSort; UuWIT3W>%
import org.rut.util.algorithm.support.InsertSort; ce9P-}d
import org.rut.util.algorithm.support.MergeSort; xy7A^7Li
import org.rut.util.algorithm.support.QuickSort; *:@KpYWx"
import org.rut.util.algorithm.support.SelectionSort; n82tZpn
import org.rut.util.algorithm.support.ShellSort; a8JAJkFB
2+rT .GFc
/** }[;ZZm?
* @author treeroot ?E"192,z@
* @since 2006-2-2 D[/fs`XES
* @version 1.0 ?@9v+Am!
*/ 6X*vCylI
public class SortUtil { Ku l<Q<
public final static int INSERT = 1; 3e&+[j
public final static int BUBBLE = 2; <rj'xv
public final static int SELECTION = 3; 7DJEx~"!2-
public final static int SHELL = 4; 5[Vr {^)
public final static int QUICK = 5; SK\@w9#&$
public final static int IMPROVED_QUICK = 6; @W>@6E
public final static int MERGE = 7; =|]h-[P'
public final static int IMPROVED_MERGE = 8; 5[jcw`
public final static int HEAP = 9; %-blx)Pc
N:)x67,
public static void sort(int[] data) { EL$DvJ~
sort(data, IMPROVED_QUICK); <#h,_WP*
} z3uR1vF'
private static String[] name={ S-S%IdL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C P}fxDW
}; A7Ql%$v7^
ICN>kJ\;M
private static Sort[] impl=new Sort[]{ q*UHzE:LI
new InsertSort(), bW6| &P}X
new BubbleSort(), zsXgpnlHT
new SelectionSort(), Pp-N2t86#2
new ShellSort(), *~)6 sm
new QuickSort(), T;92M}\
new ImprovedQuickSort(), uaF-3
new MergeSort(), oZiW4z*Wh
new ImprovedMergeSort(), v1,#7sAW'
new HeapSort() PaI\y!f
}; TRGpE9i
H54RA6$>
public static String toString(int algorithm){ x#EE_i/W
return name[algorithm-1]; KSPa2>lz?
} gB'ajX=OA/
y''~j<'
public static void sort(int[] data, int algorithm) { ayA;6Qt
impl[algorithm-1].sort(data); 5v)^4( )
} ,%TBW,>
B?z2@,
public static interface Sort { e"t0 rScA
public void sort(int[] data); $Q/@5f'T`9
} HDHG~<s
B-MS@<2
public static void swap(int[] data, int i, int j) { ,a{85HLr]
int temp = data; rkjnw@x\
data = data[j]; Wk0E7Pr
data[j] = temp; !i;6!w
} tn5%zJ#+
} $xWwI(SaB