[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; 6E}9uwQ
} W#<1504ip
int i1=l; 6`CRT TJ7
int i2=mid+1; pc*)^S
for(int cur=l;cur<=r;cur++){ Ldjz-
if(i1==mid+1) )k,n}
data[cur]=temp[i2++]; z;S-Q,
else if(i2>r) 5&n{QE?Um
data[cur]=temp[i1++]; }aRib{L
else if(temp[i1] data[cur]=temp[i1++]; 4=tR_s
else \Vf:/9^
data[cur]=temp[i2++]; D|9+:Y
} %)r ~GCd
} <R$ 2x_
#; ?3kuq(
} gY~r{
*vaYI3{qN
改进后的归并排序: 0MHiW=
@zg}x0]
package org.rut.util.algorithm.support; Eu?z!
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import org.rut.util.algorithm.SortUtil; U7s$';y"%
|GnTRahV.
/** lv 8EfN
* @author treeroot C.jWT1
* @since 2006-2-2 /IpCo
* @version 1.0 ,Z"<-%3
*/ -x//@8"
public class ImprovedMergeSort implements SortUtil.Sort { }S/i3$F0~
"Q.*
private static final int THRESHOLD = 10; |ri)-Bk ,
@oAz
/* 3gi)QCsk
* (non-Javadoc) ~gfR1SE
* x z_sejKB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y"JR kJ
*/ sasurR|;
public void sort(int[] data) { _>- D*l
int[] temp=new int[data.length]; F_ F"3'[
mergeSort(data,temp,0,data.length-1); So aqmY;+
} J$3g3%t
CZ5\Et6r
private void mergeSort(int[] data, int[] temp, int l, int r) { ^LMgOA(7
int i, j, k; 79h~w{IT@
int mid = (l + r) / 2; TLdlPBnr8
if (l == r) BR2Gb~#T
return; C%XO|sP
if ((mid - l) >= THRESHOLD) kU<t~+
mergeSort(data, temp, l, mid); M5^Y W#e
else iQ)ydY a
insertSort(data, l, mid - l + 1); 3 t,_{9
if ((r - mid) > THRESHOLD) >d/H4;8
mergeSort(data, temp, mid + 1, r); L)sgW(@2
else HxG8'G
insertSort(data, mid + 1, r - mid); YFO{i-*q
?5C'9 V
for (i = l; i <= mid; i++) { 5'lPXKn+L
temp = data; Aedf (L7\
} JVE\{ e)
for (j = 1; j <= r - mid; j++) { d?2V2`6
temp[r - j + 1] = data[j + mid]; &|hK79D
} kka5=u
int a = temp[l]; !/zRw-q3B
int b = temp[r]; m@4Dz|
for (i = l, j = r, k = l; k <= r; k++) { [?!I*=*b
if (a < b) { CXlbtpK2k
data[k] = temp[i++]; *pKTJP
a = temp; ++0)KSvw
} else { Ed9Uw7
data[k] = temp[j--]; %MHb
b = temp[j]; .G0 N+)
} l:85 _E
} #z `W ,^C
} 'YL[s
8H!QekQZ]\
/** (f#(B2j
* @param data [0H0%z#tU&
* @param l U ZM #O
* @param i G.W !
*/ fr@F7s5}
private void insertSort(int[] data, int start, int len) { .|UQ)J?s
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H];B?G';C
} OrY[
} ?e7]U*jEU
} r* *zjv>
} F@w; .e!
rO1!h%&o"
堆排序： CD|[PkjW
C-'hXh;hQ
package org.rut.util.algorithm.support; tXD$HeBB?
4=zs&
import org.rut.util.algorithm.SortUtil; JAPr[O&
.HqFdsm
/** MmuT~d/
* @author treeroot |c_qq Bd
* @since 2006-2-2 vvoxK0
* @version 1.0 -yYdj1y;
*/ wp[Ug2;G
public class HeapSort implements SortUtil.Sort{ ?6#won
KyvZ?R
/* (non-Javadoc) U|(+-R8Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bz>X~
*/ JKfG/z|
public void sort(int[] data) { P]E-Wp'p
MaxHeap h=new MaxHeap(); I.2J-pu}
h.init(data); EE/mxN(<
for(int i=0;i h.remove(); !3ggQG!e
System.arraycopy(h.queue,1,data,0,data.length); LF<&gC
} *{o7G a
4zug9kFK
private static class MaxHeap{ U$rMZk
Hvl n>x@
void init(int[] data){ Xlo7enzY
this.queue=new int[data.length+1]; vW63j't_
for(int i=0;i queue[++size]=data; =W(*0"RM
fixUp(size); y4V:)@P
} Z6jEj9?O
} C*9X;+S0J
:FyF:=
private int size=0; %x)bZ=An
*Ak.KBg
private int[] queue; uOxHa>h
ON?Y Df
public int get() { hbjAxioA
return queue[1]; N^^0j,
} 95DEuReKi
2[E wN!IZ
public void remove() { _n&Nw7d2 M
SortUtil.swap(queue,1,size--); yNTd_XPL
fixDown(1); {Gxe%gu6K
} >}5?`.K~Q*
file://fixdown ^;C&
private void fixDown(int k) { @@EI=\
int j; HpwMm^
while ((j = k << 1) <= size) { |WS)KR !
if (j < size %26amp;%26amp; queue[j] j++; YJi%vQ*]
if (queue[k]>queue[j]) file://不用交换 'CLZ7pV
break; 0X$mT:=9
SortUtil.swap(queue,j,k); S_}`'Z )
k = j; Zg;$vIhn
} _z5/&tm_H
} w~'xZ?
private void fixUp(int k) { 9I/b$$?D
while (k > 1) { &&ioGy}1
int j = k >> 1; UD I{4+z
if (queue[j]>queue[k]) =:W2NN'
break; r8k(L{W
SortUtil.swap(queue,j,k); 7y=>Wa?T[
k = j; Obdn#Wm=
} W{p}N
} 7Z-j'pq
_vQ52H,
} :=QX^*
_ _Of0<
} ~^t@TMk$
OG\i?N
SortUtil： y@P%t9l
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package org.rut.util.algorithm; Gvb2>ZN
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import org.rut.util.algorithm.support.BubbleSort; Q PH=`s
import org.rut.util.algorithm.support.HeapSort; "CJVtO
import org.rut.util.algorithm.support.ImprovedMergeSort; Z~'t'.=z
import org.rut.util.algorithm.support.ImprovedQuickSort; }nx)|J*p
import org.rut.util.algorithm.support.InsertSort; sEhvx+(
import org.rut.util.algorithm.support.MergeSort; 8f@}-
import org.rut.util.algorithm.support.QuickSort; p8Vqy-:
import org.rut.util.algorithm.support.SelectionSort; MlO OB
import org.rut.util.algorithm.support.ShellSort; \ovs[&
sqkWQ`Ur
/** mvn- QP~"
* @author treeroot Pz4#>tP
* @since 2006-2-2 )|gw5N4;
* @version 1.0 c-Gp|.C
*/ I8H3*DE
public class SortUtil { W/'1ftn?D
public final static int INSERT = 1; l1KMEGmG
public final static int BUBBLE = 2; 9#8vPjXW}.
public final static int SELECTION = 3; y:G%p3h)[
public final static int SHELL = 4; +NlnK6T/
public final static int QUICK = 5; o|$D|E
public final static int IMPROVED_QUICK = 6; J,W<ha*
public final static int MERGE = 7; zAgX{$/Fg
public final static int IMPROVED_MERGE = 8; 1;B~n5C.
public final static int HEAP = 9; A;AQw
\"P{8<h.3
public static void sort(int[] data) { LI,wSTVjC
sort(data, IMPROVED_QUICK); +VwQ=[y]
} Kda'N$|`
private static String[] name={ VKa+[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l4C{LZ
}; Pz)lq2Zm9
F^,:p.ihm<
private static Sort[] impl=new Sort[]{ \w9}O2lL
new InsertSort(), CmEqo;Is
new BubbleSort(), T(|'.&a
new SelectionSort(), z} fpV T
new ShellSort(), ]n^iG7aB?
new QuickSort(), k1&9 bgI
new ImprovedQuickSort(), IjI'Hx
new MergeSort(), y-<.l=6A
new ImprovedMergeSort(), $8^Hkxy
new HeapSort() *l5?_tF
}; 7x)Pt@c
]b-2:M
public static String toString(int algorithm){ z/t|'8f
return name[algorithm-1]; <Iw{fj|
} m*^)#
:a wt7lqv
public static void sort(int[] data, int algorithm) { pcMzLMG<
impl[algorithm-1].sort(data); Xhe& "rM
} d/_D|ivZ=
=rKJJa N
public static interface Sort { ybaY+![*
public void sort(int[] data); i>M%)HN
} %QP[/5vQ
t]K20(FSN
public static void swap(int[] data, int i, int j) { `[H^`
int temp = data; \,R;
data = data[j]; *6I$N>1
data[j] = temp; qu B[S)2}
} ly[yn{
} fPeS;