[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; #lHA<jI
} &lp5W)D
int i1=l; E")g1xGaK
int i2=mid+1; O5?Gv??@
for(int cur=l;cur<=r;cur++){ Ws>2S
if(i1==mid+1) nD8CP[bRo
data[cur]=temp[i2++]; ca{u"n
else if(i2>r) aHvsgp]
data[cur]=temp[i1++]; 3.^Tm+ C
else if(temp[i1] data[cur]=temp[i1++]; '3MCb
else B}YpIb]d
data[cur]=temp[i2++]; m2o)/:
} |`50Tf\J
} @&G< Np`
ZC\&n4~7
} [c=T)]E1
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改进后的归并排序: @h&crI[c
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package org.rut.util.algorithm.support; Z[{k-_HgAm
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import org.rut.util.algorithm.SortUtil; Ct)l0J\XH
E3a^)S{
/** 609_ZW;)
* @author treeroot 5lc%GJybV
* @since 2006-2-2 l5R0^!t
* @version 1.0 Bh\>2]~@a
*/ ;HPQhN_
public class ImprovedMergeSort implements SortUtil.Sort { :jc ?T
!PIpvx{aX
private static final int THRESHOLD = 10; )GpH5N'EI
lwU$*?yv
/* U=a'(fX
* (non-Javadoc) #r ;;d(
* j$z<wR7j0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '.mHx#?7
*/ 0;bi*2U
public void sort(int[] data) { RTgR>qI&)
int[] temp=new int[data.length]; Y,%d_yR[
mergeSort(data,temp,0,data.length-1); -!kfwJg8N(
} U(jZf{`Mz
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private void mergeSort(int[] data, int[] temp, int l, int r) { AUk,sCxd
int i, j, k; 3i c6!T#t"
int mid = (l + r) / 2; EGKj1_ml
if (l == r) aj71oki)
return; GWU"zWli]z
if ((mid - l) >= THRESHOLD) y ;$8C
mergeSort(data, temp, l, mid); SX4"HadV>
else P})Iwk|Z
insertSort(data, l, mid - l + 1); 8<VO>WA>E
if ((r - mid) > THRESHOLD) L:(>ON
mergeSort(data, temp, mid + 1, r); covr0N)
else bJz}\[z
insertSort(data, mid + 1, r - mid); O"<W<l7Q
,>^6ztM
for (i = l; i <= mid; i++) { <r{M(yZ?@
temp = data; \VTNXEw*G
} Q--VZqn
for (j = 1; j <= r - mid; j++) { #00k7y>OyD
temp[r - j + 1] = data[j + mid]; P9\!JH!
} .Kn)sD1
int a = temp[l]; D]s8w
int b = temp[r]; Y)-)owx7
for (i = l, j = r, k = l; k <= r; k++) { z DP
if (a < b) { g@<E0 q&`$
data[k] = temp[i++]; bHi0N@W!vG
a = temp; oBm^RHTZ
} else { R>ak 3Y
data[k] = temp[j--]; !2R<T/9~
b = temp[j]; Y~</vz+H
} y$]gmg
} 4a&*?=GG
} TaZw_)4c
XYOPX>$T
/** qJQ!e
* @param data BDeX5/`U#
* @param l 9 NO^ '
* @param i !w!}`|q
*/ qOusO6
private void insertSort(int[] data, int start, int len) { h|MTE~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lDQ'
} $8{|25 *E
} QEavbh^S
} @-~ )M_
} Q UQ"2oC
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堆排序： TJB)]d<
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package org.rut.util.algorithm.support; *6-fvqCv
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import org.rut.util.algorithm.SortUtil; lE8M.ho\
0{8^)apII
/** vBMuVpzO
* @author treeroot 3N'fHy
* @since 2006-2-2 2f%G`4/p
* @version 1.0 j &#A 9!
*/ )]=1W
public class HeapSort implements SortUtil.Sort{ FAS+*GFz
=9lrPQ]w
/* (non-Javadoc) ^k'?e"[gTs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]<pnHh+2A
*/ 6a+w/IO3OU
public void sort(int[] data) { ha;Xali ]
MaxHeap h=new MaxHeap(); Y=%SK8]Q;
h.init(data); rcC}4mNe
for(int i=0;i h.remove(); nTJ-1A7EP
System.arraycopy(h.queue,1,data,0,data.length); 3 e19l!B
} 6hE. i x
PP{CK4
private static class MaxHeap{ DA/l`Pn
t Z_ni}
void init(int[] data){ sg.8Sd"]7
this.queue=new int[data.length+1]; QW5S=7
for(int i=0;i queue[++size]=data; t3#My2=
fixUp(size); \k#|[d5W
} an4^(SY
} ,_JhvPWR,)
uN:|4/;{&
private int size=0; pzo9?/-
>y2;sJ4]D%
private int[] queue; wH=L+bA>a
COE,pb17
public int get() { +s*OZ6i [
return queue[1]; MWsjkI`
} WcCJ;z:S?k
!n=?H1@
public void remove() { NhI&wl
SortUtil.swap(queue,1,size--); D# $Fj
fixDown(1); W>ziA
} {*=+g>RgD
file://fixdown UBmD 3|Zo
private void fixDown(int k) { jm-J_o;}z6
int j; QFP3S(
while ((j = k << 1) <= size) { c]#+W@$
if (j < size %26amp;%26amp; queue[j] j++; `5[$8;
if (queue[k]>queue[j]) file://不用交换 d},IQ,Az:Z
break; lZY0A#
SortUtil.swap(queue,j,k); AoaRlk-#
k = j; E&\dr;{7
} >@NH Al
} uhyw?#f
private void fixUp(int k) { 0!D,74r
while (k > 1) { L[]*vj
int j = k >> 1; yGNZw7^(
if (queue[j]>queue[k]) uCc.dluU
break; ;XJK*QDN
SortUtil.swap(queue,j,k); r'kUU]j9
k = j; cTA8F"UGD
} n{>Ge,enP0
} D 8nt%vy
@}#"o
} w/8`]q
l7 +#gPA
} Di[}y;
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SortUtil： p2c4 <f-M
3:">]LMi
package org.rut.util.algorithm; }{! #`'s
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import org.rut.util.algorithm.support.BubbleSort; `EV" /&`
import org.rut.util.algorithm.support.HeapSort; a@|/D\C
import org.rut.util.algorithm.support.ImprovedMergeSort; R^}}-Dvr
import org.rut.util.algorithm.support.ImprovedQuickSort; G}o?lo\#h
import org.rut.util.algorithm.support.InsertSort; L<kIzB !
import org.rut.util.algorithm.support.MergeSort; e&Z\hZBb
import org.rut.util.algorithm.support.QuickSort; T;cyU9
import org.rut.util.algorithm.support.SelectionSort; Wq bfZx
import org.rut.util.algorithm.support.ShellSort; g/)$-Z)Nu
59?@55
/** -#=y
* @author treeroot .k{omr&Dy5
* @since 2006-2-2 |G2hm8 Y
* @version 1.0 pK)*{fC$`
*/ 0jS"PH?[
public class SortUtil { ]r#YU0
public final static int INSERT = 1; g$&uD
public final static int BUBBLE = 2; l!n<.tQW
public final static int SELECTION = 3; ]gN]Cw\L
public final static int SHELL = 4; u/Os
public final static int QUICK = 5; ~c e?xr|
public final static int IMPROVED_QUICK = 6; [C GFzxz$
public final static int MERGE = 7; .U8Se+;
public final static int IMPROVED_MERGE = 8; z*Y4t?+
public final static int HEAP = 9; kmJ{(y)w
PGT*4r21
public static void sort(int[] data) { @W\y#5"B
sort(data, IMPROVED_QUICK); #n=b*.
} kzA%.bP|
private static String[] name={ U'pm5Mc\q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -29Sw
}; o8 A]vaa
/ 38b:,
private static Sort[] impl=new Sort[]{ 8 S'g%
new InsertSort(), J 4$^Hr
new BubbleSort(), |!r.p_Zt
new SelectionSort(), N=qe*Rlf
new ShellSort(), vYh_<Rp5
new QuickSort(), NF& ++Vr6
new ImprovedQuickSort(), dcFqK~
new MergeSort(), V}1D1.@
new ImprovedMergeSort(), =F!DwaZ
new HeapSort() u3!aKXnv<
}; O|#N$a&_N
t@GPB]3[
public static String toString(int algorithm){ A#s`!SNv
return name[algorithm-1]; x\=2D<@az
} gTI!b
l2DhFt$!=
public static void sort(int[] data, int algorithm) { T[w]w
impl[algorithm-1].sort(data); P]bq9!{1
} V\ud4
O[p;IG`
public static interface Sort { Evz;eobW/
public void sort(int[] data); JHY0J &4s
} )I80Nq
#A8d@]Ps
public static void swap(int[] data, int i, int j) { Cdjh/+!f
int temp = data; fvajNP
data = data[j]; !/4f/g4Ze
data[j] = temp; ?Rc+H;x=f
} !6eXJ#~[E
} Luxo,Ve