[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; T<L^N+<,{N
} Pf_S[ sm
int i1=l; E-{^E.w1
int i2=mid+1; Cxcr/9
for(int cur=l;cur<=r;cur++){ l%`F&8K
if(i1==mid+1) XO9M_*Va
data[cur]=temp[i2++]; S_T1y
else if(i2>r) ]a!xUg!S
data[cur]=temp[i1++]; q~59F@
else if(temp[i1] data[cur]=temp[i1++]; %uoQ9lD'
else X5khCLHi
data[cur]=temp[i2++]; }#qGqY*@LK
} V%_4%
} m1IKVa7-\}
6sE{{,OGB
} !p[9{U->o;
g(Io/hyj
改进后的归并排序: :gB[O>'<m
C:uz6i1
package org.rut.util.algorithm.support; J8"[6vId~
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import org.rut.util.algorithm.SortUtil; Qq@G\eRo
`AkIK*
/** NO0"*c;
* @author treeroot 9XHz-+bQ
* @since 2006-2-2 Mze;k3
* @version 1.0 =;3fq-
*/ HoLv`JA
public class ImprovedMergeSort implements SortUtil.Sort { Sje wuIi1
JIFU;*PR1
private static final int THRESHOLD = 10; #CnHf
nD0}wiL{
/* I0'[!kBF|
* (non-Javadoc) T /mI[*1xI
* \(PohwWWo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oP2fX_v1x
*/ !{82D[5
public void sort(int[] data) { +dPL>R
int[] temp=new int[data.length]; >^OC{~Az
mergeSort(data,temp,0,data.length-1); R@*O!bD
} d7&eLLx
)m&U#S _;
private void mergeSort(int[] data, int[] temp, int l, int r) { H%1$,]F
int i, j, k; Maqf[ Vky
int mid = (l + r) / 2; p)=~% 7DV
if (l == r) YqV8D&I
return; 4:sjH.u<
if ((mid - l) >= THRESHOLD) HeK h>
mergeSort(data, temp, l, mid); 8`]=C~G
else ;),BW g
insertSort(data, l, mid - l + 1); e }*0ghKI
if ((r - mid) > THRESHOLD) ~=wCwA|1
mergeSort(data, temp, mid + 1, r); Y];Ycj;
else qTB$`f'|$
insertSort(data, mid + 1, r - mid); HJC(\\~
`Bw9O%]-S
for (i = l; i <= mid; i++) { enTW0U}
temp = data; WA$>pG5s
} `Rdm-[&
for (j = 1; j <= r - mid; j++) { CAU0)=M
temp[r - j + 1] = data[j + mid]; 0vGyI>
} $x#FgD(iI
int a = temp[l]; D&ve15wL
int b = temp[r]; /oL;YIoQX
for (i = l, j = r, k = l; k <= r; k++) { x-'~Bu
if (a < b) { XG@`ZJhU6
data[k] = temp[i++]; J@L9p46,
a = temp; S|zW^|YU
} else { ~aXqU#8
data[k] = temp[j--]; &(a(W22O
b = temp[j]; JTqq0OD}
} Gs*G<P"
} 3pXLSdxB
} R|P_GN6>
4<X!<]3]
/** |3{&@7
* @param data \@~UDP]7
* @param l zD)pF1,7:8
* @param i DOQc"+
*/ !>(RK"KWq]
private void insertSort(int[] data, int start, int len) { @+Y8*Rj\3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `T2<<<
} J RPSvP\
} +y#T?!jQYj
} O%f8I'u$
} [,~TaP}m
U{ ;l0 2S
堆排序： e.o;eD}"
*RR[H6B^]X
package org.rut.util.algorithm.support; f&hwi:t
C*I(|.i@
import org.rut.util.algorithm.SortUtil; #Y93y\
dp5f7>]:(
/** ;U`X 6d
* @author treeroot >~\w+^2f8
* @since 2006-2-2 _}mK!_`
* @version 1.0 *fO{ a
*/ up%Z$"Y
public class HeapSort implements SortUtil.Sort{ l+y}4k=/
}E}8_8T6
/* (non-Javadoc) m~],nl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n^hocGH*
*/ quo^fqS&a
public void sort(int[] data) { _ jAo:K_Z
MaxHeap h=new MaxHeap(); =C f(B<u
h.init(data); ~"!a9GZ
for(int i=0;i h.remove(); @-#T5?
System.arraycopy(h.queue,1,data,0,data.length); O4No0xeWo
} |c2v%'J2G
8@M'[jT
private static class MaxHeap{ N8!TZ~1$
uD["{?H
void init(int[] data){ *o' 4,+=am
this.queue=new int[data.length+1]; ecX/K.8l
for(int i=0;i queue[++size]=data; !]S=z^"<
fixUp(size); NNa1EXZ[
} 2N~E' 25
} z}.D" P+
cX At:m
private int size=0; 1Qh`6Ya f
=f:(r'm?r.
private int[] queue; ACV ek
~]8p_;\
public int get() { ^ft]b2i
return queue[1]; l[/q%Ca'>
} rwpgBl
0]x;n+G[q
public void remove() { s6=YV0w(
SortUtil.swap(queue,1,size--); LQ-6vrbs
fixDown(1); j1$<]f
} )Hf~d=GG
file://fixdown >WM3|
private void fixDown(int k) { .}9FEn 8
int j; nd+?O7~}(
while ((j = k << 1) <= size) { }`9`JmNM
if (j < size %26amp;%26amp; queue[j] j++; C$#W{2x%6
if (queue[k]>queue[j]) file://不用交换 \~X&o% y
break; -{9Gagy2&
SortUtil.swap(queue,j,k); |,}E0G.
k = j; &-GuKH(Y<
} (G4'(6
} $Kq<W{H3ut
private void fixUp(int k) { 4VIg>EL*
while (k > 1) { b Dg9P^<n
int j = k >> 1; G^Xd-7 GQ
if (queue[j]>queue[k]) [xpQH?
break; M^H90GN)X
SortUtil.swap(queue,j,k); 3:|-#F*k{
k = j; ]@SU4
} ]0D9N"
} u fw cF*
w{'2q^>6*
} 2z983^
'@:[axu
} {rPk3
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SortUtil： 2q%K)h
*=vlqpG
package org.rut.util.algorithm; 3$"/>g/
\8"QvC]
import org.rut.util.algorithm.support.BubbleSort; $o^e:Y, a
import org.rut.util.algorithm.support.HeapSort; lEfBe)7+
import org.rut.util.algorithm.support.ImprovedMergeSort; i=8UBryr'e
import org.rut.util.algorithm.support.ImprovedQuickSort; -3mgza
import org.rut.util.algorithm.support.InsertSort; rR!U;
import org.rut.util.algorithm.support.MergeSort; u3Do~RyL[
import org.rut.util.algorithm.support.QuickSort; 7C5pAb:
import org.rut.util.algorithm.support.SelectionSort; X&\o{w9%
import org.rut.util.algorithm.support.ShellSort; m1e b8yX
<*YO~S(R
/** w4{y"A
* @author treeroot 8U^D(jrz
* @since 2006-2-2 IT1PPm
* @version 1.0 nC~fvyd<P
*/ :l~EE!
public class SortUtil { ~|R[O^9B
public final static int INSERT = 1; >I-g[*
public final static int BUBBLE = 2; (/fT]6(
public final static int SELECTION = 3; )C}KR`"
public final static int SHELL = 4; lcig7%
public final static int QUICK = 5; e}Q>\t45
public final static int IMPROVED_QUICK = 6; B~_Spp
public final static int MERGE = 7; >Zdi5') 5
public final static int IMPROVED_MERGE = 8; UE)fUTS
public final static int HEAP = 9; 99KVtgPm
[EGx
public static void sort(int[] data) { l<2oklo5
sort(data, IMPROVED_QUICK); pb$fb
} gPUo25@pn*
private static String[] name={ Ea4 * o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nx;$dxx_Ws
}; 4p x_ZD#J
E!@/NE\-
private static Sort[] impl=new Sort[]{ E|,30Z+
new InsertSort(), jm>U6
new BubbleSort(), ;\s~%~\
new SelectionSort(), _:5=|2-E
new ShellSort(), 6To:T[ z#
new QuickSort(), -gSj>b7T
new ImprovedQuickSort(), q5?L1
new MergeSort(), tE:X,Lt[
new ImprovedMergeSort(), vpafru4
new HeapSort() i>"dBJh]b
}; v?%3~XoH
.M+v?Ad
public static String toString(int algorithm){ &Y=.D:z<
return name[algorithm-1]; 3`rIV*&_{
} ?{j@6,
N<"`ShCNM
public static void sort(int[] data, int algorithm) { %|jzEBz@
impl[algorithm-1].sort(data); /=trj5h
} 1uC;$Aj6:
XSl!T/d
public static interface Sort { \kk!Dz*H
public void sort(int[] data); q\U4n[Zk
} }Eb]9c\
^vn\4
public static void swap(int[] data, int i, int j) { *N'hA5.z
int temp = data; RnSm]}?
data = data[j]; {Ve D@
data[j] = temp; SJOmeN}4)
} *pK lA&_
} Ivjw<XP6K