[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; H[;\[3
} m})EYs1
int i1=l; @D3|Ak1
int i2=mid+1; kJfMTfl,
for(int cur=l;cur<=r;cur++){ Jh6 z5xUV
if(i1==mid+1) 1>"Yw|F-|3
data[cur]=temp[i2++]; aj\ zc I
else if(i2>r) Wh7}G
data[cur]=temp[i1++]; Y}aaW[
else if(temp[i1] data[cur]=temp[i1++]; &4 ~C%{H3
else `#Yv(a2TY
data[cur]=temp[i2++]; V=+wsc
} k%-S7iQ
} )e|n7|} $
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} 6M)4v{F
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改进后的归并排序: $!m (S&f
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package org.rut.util.algorithm.support; IMF9eS{L
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import org.rut.util.algorithm.SortUtil; kbR!iPM-;
8 FJ>W.
/** O"c@x:i
* @author treeroot -h|YS/$f
* @since 2006-2-2 RY\[[eG
* @version 1.0 ! ,v!7I
*/ zmEg4v'I
public class ImprovedMergeSort implements SortUtil.Sort { ^5-8'9w
cCWk^lF],
private static final int THRESHOLD = 10; e ab_"W
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/* {YT@$K]w,
* (non-Javadoc) ~4t7Q
* JIYZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q9C;_Up
*/ O.+02C_*
public void sort(int[] data) { 8h=Rfa9
int[] temp=new int[data.length]; @*s7~:VQ
mergeSort(data,temp,0,data.length-1); '4x uH3
} -$0w-M8'
_(&XqEX
private void mergeSort(int[] data, int[] temp, int l, int r) { \'}? j-8
int i, j, k; +|OrV'
int mid = (l + r) / 2; NR@n%p
if (l == r) }o{6
return; .on}F>3k$
if ((mid - l) >= THRESHOLD) {rE]y C^
mergeSort(data, temp, l, mid); + NpHk
else G|,'6|$jE
insertSort(data, l, mid - l + 1); CdFr YL+F
if ((r - mid) > THRESHOLD) g~Hmka_fD1
mergeSort(data, temp, mid + 1, r); sm1(I7y
else ^@a|s Sb
insertSort(data, mid + 1, r - mid); 2uajK..b
__Tg1A
for (i = l; i <= mid; i++) { 3ug-cq
temp = data; _w\A=6=q|
} d0"Xlleld
for (j = 1; j <= r - mid; j++) { v? VNWK2
temp[r - j + 1] = data[j + mid]; '*XX|\.
} g,,'Pdd7Pn
int a = temp[l]; $RJpn]d j
int b = temp[r]; qL 0{w7
for (i = l, j = r, k = l; k <= r; k++) { J<'7z%2w
if (a < b) { N-Jp; D
data[k] = temp[i++]; r:QLO~l/
a = temp; N7WQ{/PSG
} else { nYF;.k
data[k] = temp[j--]; )vcyoq
b = temp[j]; tI-u@ g
} l^,"^vz
} W.O]f.h
} fSL'+l3
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/** G$HXc$OY
* @param data Y8$,So>~
* @param l _,C>+dv)
* @param i 0wlKBwf`J
*/ LE1#pB3TG
private void insertSort(int[] data, int start, int len) { F]4JemSjK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QT\=>,Fz _
} u+ ?Wm40E
} Tz"Xm/Gy
} FWJhi$\:D]
} .dvOUt I[
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堆排序： L=1~)>mP
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package org.rut.util.algorithm.support; BA 9c-Ay
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import org.rut.util.algorithm.SortUtil; $QB~ x{v@n
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/** #3WKm*T/
* @author treeroot F=qG+T
* @since 2006-2-2 0zCmU)ng
* @version 1.0 l2lyi
*/ TODTR7yGo
public class HeapSort implements SortUtil.Sort{ m+ww
; wpX
/* (non-Javadoc) $afE= qC*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E/6@>.T?'
*/ q]qKU`m!Q`
public void sort(int[] data) { {|Pg]#Wi&
MaxHeap h=new MaxHeap(); \F }s"#
h.init(data); + yF._Ie=
for(int i=0;i h.remove(); P nxxW?
System.arraycopy(h.queue,1,data,0,data.length); R | &+g\{;
} zx7g5;J
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private static class MaxHeap{ w '<8lw
zKP{A Sk
void init(int[] data){ A/%+AH(
this.queue=new int[data.length+1]; VYj*LiR
for(int i=0;i queue[++size]=data; lNQ8$b
fixUp(size); oieZopYA
} 6_.K9;Gd
} U fzA/
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private int size=0; |~y>R#u8pm
"iC*Eoz#.
private int[] queue; ofu {g
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public int get() { \>%.ktG
return queue[1]; REe<k<>p~
} =%\y E0#
!4blX'<w
public void remove() { i3s,C;7[2
SortUtil.swap(queue,1,size--); L#|,_j=9
fixDown(1); yl#(jb[?1
} 5^}"Tn4I
file://fixdown 0bt"U=x4
private void fixDown(int k) { T/$6ov+K
int j; mg)ZoC
while ((j = k << 1) <= size) { I\|x0D
if (j < size %26amp;%26amp; queue[j] j++; n> >!dg Og
if (queue[k]>queue[j]) file://不用交换 wy1xZQ<5
break; X4D>
SortUtil.swap(queue,j,k); 8!T6N2O6d
k = j; -b7q)%V
} ;Az9p h
} j1yW{
private void fixUp(int k) { &QoV(%:]
while (k > 1) { ~G;lEp
int j = k >> 1; Rpi@^~aPE
if (queue[j]>queue[k]) *_aeK~du.
break; x2KIGG^
SortUtil.swap(queue,j,k); ;Rz+4<
k = j; ZMI!Sl
} 9AxeA2/X
} KqE5{ q
BJ]4j-^o
} :JEzfI1
b&i0)/;
} nVp*u9]
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SortUtil： ir-= @@
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package org.rut.util.algorithm; SS/9fT"[
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import org.rut.util.algorithm.support.BubbleSort; 6^Q Bol
import org.rut.util.algorithm.support.HeapSort; ks=l Nz9
import org.rut.util.algorithm.support.ImprovedMergeSort; vuOixAkw
import org.rut.util.algorithm.support.ImprovedQuickSort; $Eo)i
import org.rut.util.algorithm.support.InsertSort; !D_Qat
import org.rut.util.algorithm.support.MergeSort; C|@6rr9TA
import org.rut.util.algorithm.support.QuickSort; "8'aZ.P
import org.rut.util.algorithm.support.SelectionSort; %s^2m"ca}=
import org.rut.util.algorithm.support.ShellSort; 7<ZP(I5X
RkrZncBgV<
/** z&3in
* @author treeroot Q}A*{9#|
* @since 2006-2-2 \UD:9g"
* @version 1.0 Yb~[XS |p
*/ /hojm6MM
public class SortUtil { >sUavvJ~x
public final static int INSERT = 1; +~E;x1&'
public final static int BUBBLE = 2; >A+0"5+_p
public final static int SELECTION = 3; U|Du9_0
public final static int SHELL = 4; tY1M7B^~
public final static int QUICK = 5; IC1oW)
public final static int IMPROVED_QUICK = 6; u Z(vf
public final static int MERGE = 7; rfl-(_3
public final static int IMPROVED_MERGE = 8; @-7h}2P Q
public final static int HEAP = 9; )YB@6TiD
LFi8@
public static void sort(int[] data) { ?D6?W6@
sort(data, IMPROVED_QUICK); c%5G3j
} &Ow[
private static String[] name={ `<0{U]m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" M[C9P.O%w
}; E%?X-$a
2]$ 7
private static Sort[] impl=new Sort[]{ e~NEyS~3
new InsertSort(), /!V)2j,
new BubbleSort(), 2hlb$N-hk
new SelectionSort(), vp"b_x1-
new ShellSort(), xXCSaBS~
new QuickSort(), :r{;'[38
new ImprovedQuickSort(), GkhaB(btk'
new MergeSort(), oi@/H\7j
new ImprovedMergeSort(), cVx#dDdA
new HeapSort() pCE,l'Xa
}; &.> 2@
s$V'|Pt
public static String toString(int algorithm){ OwdA6it^f
return name[algorithm-1]; B.e3IM0
} ({GN.pC(
3X0"</G6
public static void sort(int[] data, int algorithm) { cTU%=/gbc<
impl[algorithm-1].sort(data); 4\cJ}p}LZ{
} ~HW}Wik
f.Uvf^T}2
public static interface Sort { r+4<Lon~
public void sort(int[] data); qmWK8}F.cE
} 6`ZHFem
XZ8#8Di8
public static void swap(int[] data, int i, int j) { @Kx@ 2#~b
int temp = data; |;G9K`8
data = data[j]; X^?M4
data[j] = temp; r#%e$
} dB{VY+!
} ^#-i%V%