[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; x0Bw{>Q
} ,86K
int i1=l; /)V4k:#b
int i2=mid+1; [BXyi
for(int cur=l;cur<=r;cur++){ uu}-"/<~7
if(i1==mid+1) wRVD_?
data[cur]=temp[i2++]; 30 7fBa
else if(i2>r) ^Omfe
data[cur]=temp[i1++]; |f NMs
else if(temp[i1] data[cur]=temp[i1++]; FDLd&4Ex
else W(@>?$&
data[cur]=temp[i2++]; ')nnWlK
} (K!4Kp^m
} SFO&=P:U
Tb#
} w:Q|?30
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改进后的归并排序: En5!"w|j
k!E"wJkpz
package org.rut.util.algorithm.support; F";FG 0
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import org.rut.util.algorithm.SortUtil; .fJ*c
g@E&uyM
/** `$-lL"
* @author treeroot dt~iw
* @since 2006-2-2 :dDxxrs"
* @version 1.0 aIu2>
*/ my,x9UPs
public class ImprovedMergeSort implements SortUtil.Sort { ?'2 v.5TQt
%CT!$Y'n
private static final int THRESHOLD = 10; ahp1!=Z-=
u33zceE8
/* },6*Y*?{
* (non-Javadoc) J~dTVBx
* o>!JrH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3'@&c?Fye
*/ $Q4=37H+
public void sort(int[] data) { pbdF]>\
int[] temp=new int[data.length]; #`j][F@N
mergeSort(data,temp,0,data.length-1); ]<X2AO1
} WF)s*$'uz;
L<)Z>@fR
private void mergeSort(int[] data, int[] temp, int l, int r) { 0P9Wy!f7
int i, j, k; VR v02m5
int mid = (l + r) / 2; AM?Ec1S #a
if (l == r) 5bBCpNa
return; DR{]sG
if ((mid - l) >= THRESHOLD) 6S_y%8Fv&[
mergeSort(data, temp, l, mid); A`C-sD>
else r|bPR!0
insertSort(data, l, mid - l + 1); )KE_t^$
if ((r - mid) > THRESHOLD) M c@GH
mergeSort(data, temp, mid + 1, r); )l{A{f6O
else YOKR//|3
insertSort(data, mid + 1, r - mid); 2[BA(B
uRGB/ju^E
for (i = l; i <= mid; i++) { ,TJ/3_lH
temp = data; 5Jw"{V?Ak
} fKYKW?g;)Z
for (j = 1; j <= r - mid; j++) { \-G5l+!
temp[r - j + 1] = data[j + mid]; j]HE>
} uTw|Q{f
int a = temp[l]; pe#*I/)b
int b = temp[r]; Yhk6Uog{4
for (i = l, j = r, k = l; k <= r; k++) { 2+&R"#I
if (a < b) { r./z,4A`
data[k] = temp[i++]; #4q1{)=
a = temp; gA"<MI'y
} else { +{Gw9h"5g*
data[k] = temp[j--]; N&N 82OG
b = temp[j]; =g[H]-Ee
} {]@Qu"M
} X{'wWWZC
} &%}6q]e
X?kPi&ru
/** 1!f2*m
* @param data xiJz`KD&
* @param l V^ Y*xZ
* @param i 'ucGt
*/ h=Oh9zsz8
private void insertSort(int[] data, int start, int len) { X{s/``n
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x{2o[dK4}
} iBS0rT_
} 1>yha j(K
} taixBNv
} Z]p8IH%~92
2| $k`I,
堆排序： !`Xt8q\r
oc=tI@W
package org.rut.util.algorithm.support; s8yCC#H"
`:R-[>5P8
import org.rut.util.algorithm.SortUtil; F\Y,JUn[G
|zb`&tv}
/** oX#9RW/ >I
* @author treeroot R;.d/U|av
* @since 2006-2-2 9g4QVo|
* @version 1.0 jvWI_Fto
*/ I=K[SY,]9
public class HeapSort implements SortUtil.Sort{ ?U$}Rsk{#
.u&|e
/* (non-Javadoc) bt0djJRw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Gk{W:866
*/ s7vPI
public void sort(int[] data) { O<bDU0s{M
MaxHeap h=new MaxHeap(); z,M'Tr.1|
h.init(data); n~9 i^
for(int i=0;i h.remove(); GPMrs)J*!
System.arraycopy(h.queue,1,data,0,data.length); 2h5tBEOX.s
} _,t&C7Yf;
BjwMb&a;
private static class MaxHeap{ $}V7(wu 6@
[Yn;G7cK
void init(int[] data){ N*HH,m&
this.queue=new int[data.length+1]; u1wg C#
for(int i=0;i queue[++size]=data; Ko]QCLL
fixUp(size); 8>2&h
} ws.?cCTpt
} ;Sy/N||
z( *]'Y
private int size=0; l#p}{
oEN)Dw o
private int[] queue; p|b+I"M
vT&j{2U7XW
public int get() { ]DGGcUk7
return queue[1]; EqVsxwa
} 9=H}yiJz
r+SEw ;
public void remove() { 'n>EEQyp'
SortUtil.swap(queue,1,size--); `D4oAx d9
fixDown(1); Ck:#1-t8{
} OuMco+C
file://fixdown >7"$}5d
private void fixDown(int k) { "^Y6ctw
int j; E`Q;DlXv>
while ((j = k << 1) <= size) { 7&=-a|k~
if (j < size %26amp;%26amp; queue[j] j++; p| Vmdnb
if (queue[k]>queue[j]) file://不用交换 ;HR 6X
break; VjC*(6<Gj
SortUtil.swap(queue,j,k); te4F"SEf
k = j; fFjLpl
} U0!^m1U:
} 0`V3s]%iu
private void fixUp(int k) { Ng?apaIi@~
while (k > 1) { j l}!T[5
int j = k >> 1; Fecx';_1`
if (queue[j]>queue[k]) mx:J>SPA8
break; >0kmRVd
SortUtil.swap(queue,j,k); Czq1 kz
k = j; xX[?L9RGz
} <Z2(qZ^Z
} 1 ,#{X3
'.=Wk^,Ua
} I93 ~8wQ
W^5<XX,ON
} X\o/i\ C}
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SortUtil： }DJ|9D^yf
VfQMFb',o
package org.rut.util.algorithm; hTlnw[I
%~][?Y ><
import org.rut.util.algorithm.support.BubbleSort; 3Gc ,I:\
import org.rut.util.algorithm.support.HeapSort; $o/0A
import org.rut.util.algorithm.support.ImprovedMergeSort; ~gSwxGT7d
import org.rut.util.algorithm.support.ImprovedQuickSort; 'bZMh9|
import org.rut.util.algorithm.support.InsertSort; YgO aZqN
import org.rut.util.algorithm.support.MergeSort; YtV |e|aD
import org.rut.util.algorithm.support.QuickSort; fG X1y
import org.rut.util.algorithm.support.SelectionSort; \Oi5=,
import org.rut.util.algorithm.support.ShellSort; 1M7\:te*
pg}~vb"
/** V?U%C%C|e
* @author treeroot JRHf.?
* @since 2006-2-2 yjGGqz$
* @version 1.0 _8,vk-,'
*/ I{`KKui<M
public class SortUtil { PN1(j|
public final static int INSERT = 1; |WD,\=J2
public final static int BUBBLE = 2; 7p P|
public final static int SELECTION = 3; *37LN
public final static int SHELL = 4; Y&oP>n! ei
public final static int QUICK = 5; +^/Nil
public final static int IMPROVED_QUICK = 6; h5LJijJ
public final static int MERGE = 7; 3g?MEM~
public final static int IMPROVED_MERGE = 8; ?)Tz'9l
public final static int HEAP = 9; DQ}_9?3
dNR7e
public static void sort(int[] data) { -&qRo0^3
sort(data, IMPROVED_QUICK); hEyX~f
} l-DGy#h+z
private static String[] name={ ir9Q##f
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" pb=jvK
}; !L&=?CX
Zp/qs z(]
private static Sort[] impl=new Sort[]{ ^2&O3s
new InsertSort(), O!#L#u53
new BubbleSort(), .Ws iOJU
new SelectionSort(), *6 I =oE
new ShellSort(), ,Hik(22
new QuickSort(), IeRl6r%:
new ImprovedQuickSort(), ZTQ$Ol+{q
new MergeSort(), :J=+;I(UI
new ImprovedMergeSort(), F'V+2,.
new HeapSort() c7FfI"7HR
}; #Pb7EL#c
a}5vY
public static String toString(int algorithm){ O0K@M
return name[algorithm-1]; H]%mP|
} ?c|`R1D
U6/m_`nc
public static void sort(int[] data, int algorithm) { :0J-ek.;
impl[algorithm-1].sort(data); jw`&Np2Q
} ef;&Y>/
'DL;c@}37
public static interface Sort { zPX=MfF
public void sort(int[] data); @&~OB/7B:
} k#8S`W8^
j6&zRFX
public static void swap(int[] data, int i, int j) { G/LXUhuif
int temp = data; hO+O0=$}wN
data = data[j]; WU+Jo@]y
data[j] = temp; "}]GQt< F
} EWuiaw.
} _0DXQS\