[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; lGZf_X)gA^
} V(c>1xLlz
int i1=l; =%Z5"];
int i2=mid+1; t$zeBOI)
for(int cur=l;cur<=r;cur++){ c%x9.s<+1
if(i1==mid+1) ^<OcbOn;O
data[cur]=temp[i2++]; .4O~a
else if(i2>r) "HwSW4a]
data[cur]=temp[i1++]; qayM0i>>
else if(temp[i1] data[cur]=temp[i1++]; 7I4<Dj
else 6haw\ *
data[cur]=temp[i2++]; Ygs:Ox"[-G
} ,d`6 {ll
} YHQvx_0yP
KJ#SE|
} oGvk,mh"(
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改进后的归并排序: pgipT#_K
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package org.rut.util.algorithm.support; oo-O>M#5
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import org.rut.util.algorithm.SortUtil; qLWM,[Og
ec3zoKtV
/** J5"d|i
* @author treeroot <19A=
* @since 2006-2-2 _MLbJ
* @version 1.0 v9 *WM3
*/ L"Dos +
public class ImprovedMergeSort implements SortUtil.Sort { dKJ-{LV
Zgw4[GpL
private static final int THRESHOLD = 10; LTWiCI
;}KT 3Q<^
/* [MXyOE
* (non-Javadoc) VKMgcfbHr/
* U+-R2w]#q_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7#+>1 "\
*/ qe2@bG%2+F
public void sort(int[] data) { /CXQ&nwY9=
int[] temp=new int[data.length]; <IO@Qj1*
mergeSort(data,temp,0,data.length-1); \]|(w*C
} 0`KR8# A@
LMHiiOs,
private void mergeSort(int[] data, int[] temp, int l, int r) { 76(/(v.x
int i, j, k; !x[].Urj
int mid = (l + r) / 2; f<y-{.VnN$
if (l == r) 6lob&+
return; ?M BOd9
if ((mid - l) >= THRESHOLD) AwtiV-w
mergeSort(data, temp, l, mid); `R m<1
else 1YScZ
insertSort(data, l, mid - l + 1); Nh[H[1"J
if ((r - mid) > THRESHOLD) C Ef*:kr
mergeSort(data, temp, mid + 1, r); D%~"]WnZ\Q
else 9Yhlq$;g
insertSort(data, mid + 1, r - mid); J b?x-%Za
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for (i = l; i <= mid; i++) { $bFH%EA.
temp = data; "@YtxYTW-
} "h7Np/ m3
for (j = 1; j <= r - mid; j++) { ^H`4BWc
temp[r - j + 1] = data[j + mid]; 4L/nEZ!Nsu
} $[0\Th
int a = temp[l]; 66{Dyn7J~
int b = temp[r]; Ia j`u
for (i = l, j = r, k = l; k <= r; k++) { 4 z^7T
if (a < b) { 3R<VpN){
data[k] = temp[i++]; PwnfXsR
a = temp; dR!x)oO=
} else { 1Vx>\A
data[k] = temp[j--]; e/b | sl
b = temp[j]; vD76IG jm
} 3$4I
} {[~dI ~
} G * =>
sL)7MtNwy
/** &mkL4jXG
* @param data KM9H<;A
* @param l nQ@<[KNd
* @param i 4}-G<7*
*/ 1h3`y
private void insertSort(int[] data, int start, int len) { 0-:dzf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %^l&:\ hy
} R>hL.+l.
} k>F>y|m
} \3T[Cy|5|
} d>O/Zal
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堆排序： {~`{bnx^]7
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package org.rut.util.algorithm.support; vLpIVNA]]Y
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import org.rut.util.algorithm.SortUtil; >{[
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/** Z5eM
* @author treeroot DfX~}km
* @since 2006-2-2 y#FFxSH>
* @version 1.0 Uf9L*Z'6il
*/ WsW] 1p
public class HeapSort implements SortUtil.Sort{ M_h8{
+z<GycIc?K
/* (non-Javadoc) y ~Fi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JC#5CCz
*/ 70{B/ ($
public void sort(int[] data) { vr4{|5M
MaxHeap h=new MaxHeap(); CYYo+5x
h.init(data); O-ppR7edh
for(int i=0;i h.remove(); oG\lejO
System.arraycopy(h.queue,1,data,0,data.length); YB.@zL0.(
} ee{K5G
1[!7xA0j
private static class MaxHeap{ :OV6R,
[Pl''[
void init(int[] data){ B & ]GGy
this.queue=new int[data.length+1]; n7.85p@ua
for(int i=0;i queue[++size]=data; vs@u*4.Ut<
fixUp(size); <8^ws90Y
} 5p ,HkV
} F{Oaxn
W4(GI]`_+
private int size=0; 6Zx5^f(qd
~-UO^$M-
private int[] queue; h:i FLSf
&t6:1T
public int get() { ji<(}d~L*
return queue[1]; :mhO/Bx
} N]-skz<v
>z73uKA(
public void remove() { R&Ss ET.
SortUtil.swap(queue,1,size--); ,[<$X{9
fixDown(1); thz[h5C?C
} m#<Jr:-
file://fixdown Kw(S<~9-@
private void fixDown(int k) { "q KVGd
int j; rDGrq9
while ((j = k << 1) <= size) { JAy-N bb\
if (j < size %26amp;%26amp; queue[j] j++; o.V JnrJ
if (queue[k]>queue[j]) file://不用交换 n<1*cL:8B
break; :3{n(~
SortUtil.swap(queue,j,k); F`1J&S;C
k = j; 39L_O RMH
} o5:md :\
} @|{8/sOq
private void fixUp(int k) { S0ltj8t
while (k > 1) { 7rG+)kHG
int j = k >> 1; Jp= )L
if (queue[j]>queue[k]) 7>h(M+ /
break; Ii<k<Bt,
SortUtil.swap(queue,j,k); ~V0 GRPnI
k = j; \jb62Jp
} +No` 89Y
} #kE8EhQZ
Gd$!xN%O
} /x<uv_"
WJk3*$=
} WJ,?5#
m'M5O@?
SortUtil： VQ8Fs/Zt!
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package org.rut.util.algorithm; G cB<i
Zu4au<
import org.rut.util.algorithm.support.BubbleSort; z#lIu
import org.rut.util.algorithm.support.HeapSort; dH'02[;
import org.rut.util.algorithm.support.ImprovedMergeSort; ZQn>+c2%!
import org.rut.util.algorithm.support.ImprovedQuickSort; LW#U+bv]Dq
import org.rut.util.algorithm.support.InsertSort; +S'm<}"1
import org.rut.util.algorithm.support.MergeSort; 8_pyfb
import org.rut.util.algorithm.support.QuickSort; nJ$2RN
import org.rut.util.algorithm.support.SelectionSort; TpI8mDO\W
import org.rut.util.algorithm.support.ShellSort; FL4BdJ\
'6\ZgOO9
/** p+0gE5
* @author treeroot vy` lfbX@
* @since 2006-2-2 "H=N>=g0E
* @version 1.0 %Y,Ru)5}
*/ 8l'W[6
public class SortUtil { q>wO=qWx
public final static int INSERT = 1; ) I(9qt>Y
public final static int BUBBLE = 2; XA;f.u
public final static int SELECTION = 3; nW<nOKTnk_
public final static int SHELL = 4; bjI3xAs~
public final static int QUICK = 5; ?H>^X)Ph
public final static int IMPROVED_QUICK = 6; H[}lzL)
public final static int MERGE = 7; ouO9%)zv
public final static int IMPROVED_MERGE = 8; y:_>R=sw
public final static int HEAP = 9; CugZ!>;^
E~VV19Bv]/
public static void sort(int[] data) { p'6XF{
sort(data, IMPROVED_QUICK); Zrj#4E1
} 0|C !n+OK
private static String[] name={ fs-LaV 0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" tx)$4v
}; R0mkEM
j<`3xd'
private static Sort[] impl=new Sort[]{ `VvQems
new InsertSort(), 8(\J~I[^
new BubbleSort(), FA := )
new SelectionSort(), 947;6a%$
new ShellSort(), vif)g6,
new QuickSort(), Bsha)<
new ImprovedQuickSort(), @/:7G.
new MergeSort(), /t! 5||G
new ImprovedMergeSort(), An^)K
new HeapSort() qM6hE.J
}; HXC\``E
[lVfhXc&
public static String toString(int algorithm){ i7cUp3
return name[algorithm-1]; 78 ]Kv^l^_
} ;?q}98-2
< Wp)Y
public static void sort(int[] data, int algorithm) { \3"B$Sp|=
impl[algorithm-1].sort(data); Vw.)T/B_D
} GB"Orm.
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public static interface Sort { agE-,
public void sort(int[] data); |=KzQY|u
} f=VlOd
fK *l?Hr
public static void swap(int[] data, int i, int j) { s:_a.4&Y
int temp = data; g$zGiqzMK
data = data[j]; H=w):kL|
data[j] = temp; cd=|P?Bi
} g'{?j~g
} Ryh 0r