[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; [#<-ZC#T*
} @fZ,.2ar
int i1=l; |mdVdD~go
int i2=mid+1; ( iBl
for(int cur=l;cur<=r;cur++){ 3s,g*
if(i1==mid+1) 7a=gH2]&
data[cur]=temp[i2++]; ?cBwPetp
else if(i2>r) 3nIU1e
data[cur]=temp[i1++]; fo*2:?K&
else if(temp[i1] data[cur]=temp[i1++]; H1pO!>M
else =)H.cuc
data[cur]=temp[i2++]; w(*vj
} +qtJaYf/0
} (lBCO?`fx
(>UZ<2GPL
} 2\A$6N;_
Ja7R2-0ii#
改进后的归并排序: dh`K`b4I
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package org.rut.util.algorithm.support; RE7?KR>
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import org.rut.util.algorithm.SortUtil; $k@O`xD,q
??-[eB.
/** W+aP}rZm:
* @author treeroot 67JA=,EE
* @since 2006-2-2 1b`1{%
* @version 1.0 ~drS} V
*/ zH?!
public class ImprovedMergeSort implements SortUtil.Sort { VuhGx:Xl
*KZYv=s,u
private static final int THRESHOLD = 10; ?mwt~_s9
6"LcJ%o
/* U2tV4_ e
* (non-Javadoc) iW]j9}t
* v}}F,c(f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7Utn\l
*/ b$d;Qx
public void sort(int[] data) { '%s.^kn
int[] temp=new int[data.length]; acajHs
mergeSort(data,temp,0,data.length-1); ExY]Sdx
} MnsJEvn/
$-OA'QwB]
private void mergeSort(int[] data, int[] temp, int l, int r) { BM%e0n7
int i, j, k; APn|\
int mid = (l + r) / 2; m)ky*"(
if (l == r) . oF &Ff/[
return; |sJ[0z
if ((mid - l) >= THRESHOLD) *.ll<p+(-
mergeSort(data, temp, l, mid); y2Q&s9$Do
else Maha$n*
insertSort(data, l, mid - l + 1); d\&U*=
if ((r - mid) > THRESHOLD) |k )=0mCz
mergeSort(data, temp, mid + 1, r); }Sm(]y
else lK?uXr7^
insertSort(data, mid + 1, r - mid); LiC*@W
4M=]wR;
for (i = l; i <= mid; i++) { rT=rrvV3g
temp = data; ?qv !w~m<
} <,3a3
for (j = 1; j <= r - mid; j++) { BA@lk+aW
temp[r - j + 1] = data[j + mid]; FZ{h?#2?
} -P(efYk
int a = temp[l]; jnkR}wAA
int b = temp[r]; G)AqbY
for (i = l, j = r, k = l; k <= r; k++) { 1jmjg~W
if (a < b) { -V*R\,>
data[k] = temp[i++]; GL>O4S<`
a = temp; afCW(zHp
} else { /H[=5
data[k] = temp[j--]; Hck]aKI+
b = temp[j]; <O(4TO
} |%BOZT
} 70yFaW
} fF!Yp iI"
h/QXPdV
/** !4ocZmj\
* @param data wm+};L&_
* @param l q\9JgD)
* @param i F#3Q_G^/
*/ j"8ZM{aO
private void insertSort(int[] data, int start, int len) { SpIv#?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [$ubNk;!z
} lB8-Z ow
} lne|5{h
} BwN0!lsF3
} E'f{i:O"~
juP7P[d$qW
堆排序： =eq[:K<6
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package org.rut.util.algorithm.support; 7zl5yKN
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import org.rut.util.algorithm.SortUtil; 'NbHa!
G~]Uk*M q
/** >1X|^
* @author treeroot F0m-23[H
* @since 2006-2-2 Ucb F|vkI
* @version 1.0 .y'>[
*/ c^5~QGuQ
public class HeapSort implements SortUtil.Sort{ vJLK,[
s2a{>II6
/* (non-Javadoc) {Ea b j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7RQR)DG
*/ "-E\[@/
public void sort(int[] data) { &.F4b~A7
MaxHeap h=new MaxHeap(); SjK
h.init(data); ,Y@Gyx!4
for(int i=0;i h.remove(); 4XL^D~V
System.arraycopy(h.queue,1,data,0,data.length); oe ~'o'
} :ffY6L+
HRpte=`q
private static class MaxHeap{ f'F?MINJP
Q*GN`07@?d
void init(int[] data){ mwO6g~@`
this.queue=new int[data.length+1]; ^23~ZHu
for(int i=0;i queue[++size]=data; 1wii8B6
fixUp(size); 2zX]\s?3
} B4ZBq%Z_
} ynp8rf
YByLoM*
private int size=0; Q1lyj7c#x
V~qNyOtA]
private int[] queue; ~\r*
HGl|-nW>
public int get() { TbMW|0 #w
return queue[1]; \a<wKTkn
} hy9\57_#
1l9G[o *
public void remove() { [=C6U_vU
SortUtil.swap(queue,1,size--); v<k?Vu
fixDown(1); ;cNv\t
} y-Fo=y
file://fixdown ^ G]J,+
private void fixDown(int k) { -$\y_?}
int j; }YQX~="
while ((j = k << 1) <= size) { Xa[.3=bV?
if (j < size %26amp;%26amp; queue[j] j++; )Dms
if (queue[k]>queue[j]) file://不用交换 @ 8(q$
break; ,.S~ Y
SortUtil.swap(queue,j,k); 9p85Pv [M=
k = j; z>xmRs
} rDtY[
} K&u_R
private void fixUp(int k) { cUk7i`M;6
while (k > 1) { `Uq#W+r,
int j = k >> 1; vN}#Kc\
if (queue[j]>queue[k]) O}gV`q;
break; ~ZaY!(R<
SortUtil.swap(queue,j,k); eNh39er
k = j; EZgwF=lO
} \eTwXe]Pv
} Fk7?xc
"> ypIR<
} .Cv6kgB@c
8H[<X_/ke
} Y+pHd\$-4
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SortUtil： _IMW{
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package org.rut.util.algorithm; +SzU
3qgS&js 7
import org.rut.util.algorithm.support.BubbleSort; uuEV_"X
import org.rut.util.algorithm.support.HeapSort; 6dQ-HI*Y#
import org.rut.util.algorithm.support.ImprovedMergeSort; a9e>iU
import org.rut.util.algorithm.support.ImprovedQuickSort; t mntp
import org.rut.util.algorithm.support.InsertSort; wKh4|Ka
import org.rut.util.algorithm.support.MergeSort; hwuiu*
import org.rut.util.algorithm.support.QuickSort; ]Ee?6]bN
import org.rut.util.algorithm.support.SelectionSort; VO5#Qgen
import org.rut.util.algorithm.support.ShellSort; %jJG>T
s3N'02G
/** _{ue8kGt
* @author treeroot ,O5NLg-
* @since 2006-2-2 E*&vy
* @version 1.0 Ha#=(9.
*/ d2FswF$C
public class SortUtil { -12UN(&&Z
public final static int INSERT = 1; ,i NXK
public final static int BUBBLE = 2; @)F)S7
public final static int SELECTION = 3; eSn+B;
public final static int SHELL = 4; 1y&\5kB
public final static int QUICK = 5; @3i\%R)n;
public final static int IMPROVED_QUICK = 6; bG"~"ipn%
public final static int MERGE = 7; +.8 \p5
public final static int IMPROVED_MERGE = 8; rw[ph[\X
public final static int HEAP = 9; k?yoQL*
r wL`Czs
public static void sort(int[] data) { HdI8f!X'TG
sort(data, IMPROVED_QUICK); PN%zIkbo
} ^S<Y>Nm]
private static String[] name={ Y>z>11yEB0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W.jGGt\<\
}; o)|flI'vT
')Zvp7>$
private static Sort[] impl=new Sort[]{ 7O2/z:$f
new InsertSort(), 8LJ8 }%*
new BubbleSort(), &,vcJ{.
new SelectionSort(), ,oe <
new ShellSort(), u]wZQl#-
new QuickSort(), .8g)av+
new ImprovedQuickSort(), ~%F9%=
new MergeSort(), Ufj`euY
new ImprovedMergeSort(), ,^r9n[M4M
new HeapSort() )iX~}7
}; o#)C^xlQ
'c&Ed
public static String toString(int algorithm){ T.F!+
return name[algorithm-1]; hW')Sp
} P;y45b
RU{twL.B
public static void sort(int[] data, int algorithm) { ? V1*cVD6i
impl[algorithm-1].sort(data); yu {d! {6
} t,Lrfv])
>{]%F*p4
public static interface Sort { G5_=H,Vmd
public void sort(int[] data); g'f@H-KCD
} tIi&;tw]
BR_1MG'{)$
public static void swap(int[] data, int i, int j) { Z#jZRNU%ox
int temp = data; pQ">UL*
data = data[j]; iU918!!N
data[j] = temp; LP^$AAy
} H'5)UX@LP
} eIF5ZPSZi