[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; w;@DcX$]
} pd2Lc $O@
int i1=l; d67Q@')00
int i2=mid+1; ]XX9.Xh=-
for(int cur=l;cur<=r;cur++){ 6~g`B<(?
if(i1==mid+1) c|?0iN
data[cur]=temp[i2++]; F|.,lb |L
else if(i2>r) GiI|6z!
data[cur]=temp[i1++]; IoUQ~JviA
else if(temp[i1] data[cur]=temp[i1++]; 6b&<5,=d:
else wXdtY
data[cur]=temp[i2++]; A0Z<1|6r*
} &+F|v(|r
} +|6 '7Z(9
F-K=Otj
} ;:(kVdb
my+y<C-o`
改进后的归并排序: }2dz];bR
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package org.rut.util.algorithm.support; i$MYR @
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import org.rut.util.algorithm.SortUtil; 15PFnk6E|
l"9.zPvT<
/** qbu>YTj
* @author treeroot S-)mv'Al'F
* @since 2006-2-2 4?Mb>\n%<^
* @version 1.0 w D|p'N
*/ CZE!rpl
public class ImprovedMergeSort implements SortUtil.Sort { v,6
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private static final int THRESHOLD = 10; MZ" yjQA
%N}OMc.W
/* %{GYTc \'X
* (non-Javadoc) cspO5S>#
* 8I=n9Uyz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g )H>Uu5@
*/ Q.SLiI
public void sort(int[] data) { rHhn)m
int[] temp=new int[data.length]; ] Tc!=SV
mergeSort(data,temp,0,data.length-1); H"v3?g`S%
} />1Ndj
nsO!
private void mergeSort(int[] data, int[] temp, int l, int r) { ^(,qkq'u D
int i, j, k; `<R;^qCt
int mid = (l + r) / 2; p4},xQzB
if (l == r) %C&HR2
return; `LD#fg*
if ((mid - l) >= THRESHOLD) 8S;]]*cD~
mergeSort(data, temp, l, mid); ;O8Uc&:P
else m e\S:
insertSort(data, l, mid - l + 1); l!Bc0
if ((r - mid) > THRESHOLD) :=J~t@
mergeSort(data, temp, mid + 1, r); w[g(8#*
else yO@KjCv"
insertSort(data, mid + 1, r - mid); }` &an$Mu
wPhN_XV
for (i = l; i <= mid; i++) { ,SEC~)L
temp = data; G/Ll4 :
} B+e$S%HV
for (j = 1; j <= r - mid; j++) { R7'a/
temp[r - j + 1] = data[j + mid]; Vp3r
} |Ld/{&Qr
int a = temp[l]; vfb~S~|U6g
int b = temp[r]; z}XmRc_Ko
for (i = l, j = r, k = l; k <= r; k++) { <hG=0Zcr
if (a < b) { KIt:ytFx
data[k] = temp[i++]; dQhh,}
a = temp; DK2m(9/`3
} else { ?sF<L/P0 F
data[k] = temp[j--]; !@ERAPuk
b = temp[j]; ;Dl< GW3<
} "T>74bj_|Q
} K@ZK@++
} :]?y,e%xu,
SSi-Z
/** ~(%TQY5
* @param data 'G3;!xk$
* @param l gQ]WNJ~>
* @param i ^4jIT1
*/ We^!(G
private void insertSort(int[] data, int start, int len) { ] r8 hMv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^G5BD_
} }lN@J,q
} }%j@%Ep[
} k_A.aYe
} 1UR;}
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堆排序： ?NazfK
Bq}p]R3X
package org.rut.util.algorithm.support; l}|KkW\y
JryCL]
import org.rut.util.algorithm.SortUtil; eURy]
Ift @/A
/** YXD6GJWo
* @author treeroot 3$YgGum
* @since 2006-2-2 caA>; +aBH
* @version 1.0 tx-HY<
*/ SoS GQ&k
public class HeapSort implements SortUtil.Sort{ vo'=d"zm
n0o'ns
/* (non-Javadoc) \k6Ho?PL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +.i?UHNB
*/ J{98x zb
public void sort(int[] data) { =F>@z4[P-
MaxHeap h=new MaxHeap(); MGUzvSf
h.init(data); <8yv(
for(int i=0;i h.remove(); +-=o16*{ !
System.arraycopy(h.queue,1,data,0,data.length); p h[ ^ve
} z"`q-R }m
3`9H
private static class MaxHeap{ ]6wo]nV[P
eQBR*@x
void init(int[] data){ I+ZK \?Rs
this.queue=new int[data.length+1]; =ytB\e
for(int i=0;i queue[++size]=data; '\[o>n2
fixUp(size); yGN@Hd:9
} ^X$k<nA;
} igNZe."V
7%aaqQ1T
private int size=0; #q2cVN1
YyR)2j1O
private int[] queue; Aj`zT'
kj(Ko{
public int get() { INQ0h`T
return queue[1]; EYc, "'
} "tuBfA+f
R-Y|;
public void remove() { *&VH!K#@{
SortUtil.swap(queue,1,size--); u(ep$>[F#_
fixDown(1); "zSi9]j
} &Nx'Nq9y
file://fixdown ]<z4p'F1%
private void fixDown(int k) { [da,SM
int j; 1(V>8}zn
while ((j = k << 1) <= size) { B7"/K]dR:
if (j < size %26amp;%26amp; queue[j] j++; LqnN5l@_B
if (queue[k]>queue[j]) file://不用交换 LQVa,'
break; v3 $+l1
SortUtil.swap(queue,j,k); `I$'Lp#5
k = j; =3rPE"@,[
} oiP8~
} \I r&&%
private void fixUp(int k) { y~)rZ-eSB
while (k > 1) { qTK\'trgx]
int j = k >> 1; Rpit>
if (queue[j]>queue[k]) 7I~Ww{
break; n-m+@jRz
SortUtil.swap(queue,j,k); nZ?BCO
k = j; J 00<NRxj"
} [zp v3Uw
} _%G)Uz{3
# 4E@y<l$
} "bFt+N
HJl$v#]#+
} %mR roR6
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SortUtil： =ogzq.+|
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package org.rut.util.algorithm; <b74L
et|P5%G
import org.rut.util.algorithm.support.BubbleSort; =j[zMO
import org.rut.util.algorithm.support.HeapSort; !a&@y#x
import org.rut.util.algorithm.support.ImprovedMergeSort; fm2,Mx6
import org.rut.util.algorithm.support.ImprovedQuickSort; 5>.)7D%
import org.rut.util.algorithm.support.InsertSort; [uxhdR`T
import org.rut.util.algorithm.support.MergeSort; wT?.Mte
import org.rut.util.algorithm.support.QuickSort; ODn6%fp%
import org.rut.util.algorithm.support.SelectionSort; rK%<2i
import org.rut.util.algorithm.support.ShellSort; ajIgL<x
5Z{h!}Y
/** %AbA(F
* @author treeroot J{$+\
* @since 2006-2-2 +RexQE
* @version 1.0 F"O{eK0T
*/ +W+O7SK\y
public class SortUtil { td^2gjr^5
public final static int INSERT = 1; Uq/#\7/rL
public final static int BUBBLE = 2; !4uTi [e
public final static int SELECTION = 3; f(.@]eu X
public final static int SHELL = 4; reml|!F-)
public final static int QUICK = 5; Sfc0 ~1
public final static int IMPROVED_QUICK = 6; T1bPI/
public final static int MERGE = 7; srfFJX7*
public final static int IMPROVED_MERGE = 8; .5+*,+-
public final static int HEAP = 9; b9uo6u4s
l1^/Q~u
public static void sort(int[] data) { %lZ++?&^
sort(data, IMPROVED_QUICK); j.MpQ^eJ7
} 8%s^>.rG
private static String[] name={ eCB(!Y|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" a p-\R
}; 2 g"_*[
910Ym!\{:
private static Sort[] impl=new Sort[]{ O[Xl*9P
new InsertSort(), X%W_cb2
new BubbleSort(), O@[c*3]e
new SelectionSort(), LjUBV_J
new ShellSort(), }^uUw&
new QuickSort(), =ECw'
new ImprovedQuickSort(), `6V-a_8;[
new MergeSort(), ")|3ZB7>*
new ImprovedMergeSort(), m7X&"0X
new HeapSort() j:D@X=|
}; QC.WR'.
p2}$S@GD
public static String toString(int algorithm){ Q!/<=95E
return name[algorithm-1]; xlVQ[Mt
} Eq-fR~<9
grEmp9Q ?
public static void sort(int[] data, int algorithm) { <{@?c
impl[algorithm-1].sort(data); MdK!Y
} .J' 8d"+
4?XX_=+F|
public static interface Sort { REnd# V2x
public void sort(int[] data); w)-@?jN
} 87%t=X
P9Hv){z
public static void swap(int[] data, int i, int j) { ^_b+o
int temp = data; bF %#KSVw
data = data[j]; .#R\t 7m%
data[j] = temp; EqzS={Olj
} P_+S;(QQ~d
} evf){XhT;n