[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; *#&*`iJ(
} YZE.@Rz
int i1=l; |vILp/"9=W
int i2=mid+1; %*W<vu>H
for(int cur=l;cur<=r;cur++){ 50~K,Jx6B
if(i1==mid+1) ^gYD*K!*
data[cur]=temp[i2++]; CxF-Z7 '
else if(i2>r) gEJi[E@
data[cur]=temp[i1++]; _[K#O,D,
else if(temp[i1] data[cur]=temp[i1++]; z`U Ukl}T
else c`G&KCw)d
data[cur]=temp[i2++]; ;3m!:l
} i8PuC^]
} N1x@-/xa|
d,cN(
} m,_d^
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改进后的归并排序: <@uOCRbV
la^ DjHA$
package org.rut.util.algorithm.support; I021p5h|
#A<P6zJXR
import org.rut.util.algorithm.SortUtil; 0q6I;$H
Ee2c5C!|C
/** RBGX_v?
* @author treeroot Of[;Qn
* @since 2006-2-2 tE"Si<[]H$
* @version 1.0 .$rC0<G[K
*/ ra6o>lI(,
public class ImprovedMergeSort implements SortUtil.Sort { Vpp&|n9^
K_/B?h
private static final int THRESHOLD = 10; SO?8%s(
m{%t?w$Au
/* 0l\y.
* (non-Javadoc) !<n"6KA.
* |m G7XL,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0ejdKdYN
*/ 0$P/jt
public void sort(int[] data) { buMqF-j
int[] temp=new int[data.length]; Mi7y&~,
mergeSort(data,temp,0,data.length-1); jE/oA<^
} f [o%hCS
\5><3*\
private void mergeSort(int[] data, int[] temp, int l, int r) { CAc %f9!3
int i, j, k; ~H6;I$e[
int mid = (l + r) / 2; \h{r;#g
if (l == r) |M~ON=
return; %y`7);.q
if ((mid - l) >= THRESHOLD) yy2I2Bv
mergeSort(data, temp, l, mid); j tA*pL'/V
else >'=MH2;
insertSort(data, l, mid - l + 1); %{5n1w
if ((r - mid) > THRESHOLD) HgRwiIt
mergeSort(data, temp, mid + 1, r); C;rG]t^%
else KFWJ}pNq
insertSort(data, mid + 1, r - mid); +a+`Z>
Ob<W/-%5tH
for (i = l; i <= mid; i++) { eE8ULtO
temp = data; uGJ"!K
} sd0r'jb
for (j = 1; j <= r - mid; j++) { _YHu96H;
temp[r - j + 1] = data[j + mid]; @,H9zrjVFZ
} u5E]t9~Pq
int a = temp[l]; Rm>^tu -
int b = temp[r]; j|(Z#3J
for (i = l, j = r, k = l; k <= r; k++) { c6AWn>H
if (a < b) { ]$iN#d|ZU
data[k] = temp[i++]; ^4$'KIq
a = temp; cPF<D$B
} else { ;[0&G6g
data[k] = temp[j--]; C2F0tr|
b = temp[j]; ~oD8Rnf
} SW?p?<
} `$RA< 3
} rAqxTdF
{I1~-8
/** G*8GGWB^a
* @param data X" R<J#4
* @param l mxG]kqi
* @param i /!xF?OmVd
*/ 6vy7l(%
private void insertSort(int[] data, int start, int len) { z01>'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (!K_Fy@
} Oe]&(
} I4_d[O9
} lX!`zy{3k
} 6j9)/HP
c+' =hR[
堆排序： '\DSTr:N
}xb=<
package org.rut.util.algorithm.support; j2n,f7hl.
m~l F`?
import org.rut.util.algorithm.SortUtil; fQLax
rP=sG;d
/** `k{& /]
* @author treeroot \c`oy=qY0
* @since 2006-2-2 Es5p}uh.[Y
* @version 1.0 ra7uU*
*/ qv{o|g QB
public class HeapSort implements SortUtil.Sort{ zsl,,gk9Y
!fkep=
/* (non-Javadoc) dj9?t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ||B;o-
*/ A2H4k|8
public void sort(int[] data) { g[z.*y/
MaxHeap h=new MaxHeap(); Ss?CfRM
h.init(data); :VA.QrKW
for(int i=0;i h.remove(); ~%y@Xsot>
System.arraycopy(h.queue,1,data,0,data.length); # '|'r+
} 9ptFG]lZ
wo^Sy41bF
private static class MaxHeap{ <eN R8(P
0Fr1Ku!
void init(int[] data){ _!V%fw
this.queue=new int[data.length+1]; ^U7OMl4Usq
for(int i=0;i queue[++size]=data; VV_l$E$
fixUp(size); B0UJq./`
} ZXb0Y2AVx
} wdE?SDs
%'Xk)-+y
private int size=0; &~DTZgY
Z'v-F^
private int[] queue; T6#"8qz<
'W. Vr4
public int get() { v6a]1B
return queue[1]; Jc*XXu)
} kMxazx1
tJI,r_
public void remove() { w5C*L)l
SortUtil.swap(queue,1,size--); BNGe exs@
fixDown(1); WgR4Ix^L#
} )|#%Czd4
file://fixdown =v6*|
private void fixDown(int k) { 5"Kx9n|
int j; D@YP7
while ((j = k << 1) <= size) { %,*$D}H
if (j < size %26amp;%26amp; queue[j] j++; 3NK ^AaTK
if (queue[k]>queue[j]) file://不用交换 =(r* 5vd
break; $6f\uuTU2"
SortUtil.swap(queue,j,k); D$k8^Vs
k = j; vFmJ;J
} vxlOh.a|/L
} wzcai 0y*
private void fixUp(int k) { -C7FuD[Xw
while (k > 1) { 0(>rG{u
int j = k >> 1; ph:3|d
if (queue[j]>queue[k]) Mio>{%/
break; [pOg'
SortUtil.swap(queue,j,k); h+7>#*DH
k = j; XFZ~ #DT&
} }2>"<)
} yYJY;".H
Al"3 kRJJ
} P.WYTst=
M++0zhS
} 8|1^|B(l
Eh8Pwt7C@
SortUtil： 2h~-
f?fKhu2
package org.rut.util.algorithm; >%b\yl%0
#G^A-yjn
import org.rut.util.algorithm.support.BubbleSort; B~WtZ-%%E
import org.rut.util.algorithm.support.HeapSort; Dma.r
import org.rut.util.algorithm.support.ImprovedMergeSort; ;I6s-moq_
import org.rut.util.algorithm.support.ImprovedQuickSort; A/*%J74v
import org.rut.util.algorithm.support.InsertSort; %"3 )TN4
import org.rut.util.algorithm.support.MergeSort; ~.tvrxg
import org.rut.util.algorithm.support.QuickSort; `d]Z)*9
import org.rut.util.algorithm.support.SelectionSort; \y Hen|%
import org.rut.util.algorithm.support.ShellSort; m$Y :0_^-
X!,@j\L
/** P~CrtTss
* @author treeroot pJpNO$$w
* @since 2006-2-2 FY0%XW
* @version 1.0 $r.U
*/ [2Mbk~
public class SortUtil { w:=V@-S8
public final static int INSERT = 1; (-yl|NFBw
public final static int BUBBLE = 2; [W,|kDK
public final static int SELECTION = 3; GUp;AoQ
public final static int SHELL = 4; H-t|i
public final static int QUICK = 5; (yrh=6=z
public final static int IMPROVED_QUICK = 6; hXL|22>w<
public final static int MERGE = 7; U5ZX78>a
public final static int IMPROVED_MERGE = 8; qc-,+sn(
public final static int HEAP = 9; ~4#B'Gy[
Wsz0yHD[`
public static void sort(int[] data) { .jg0a
sort(data, IMPROVED_QUICK); j.?:Gaab?#
} w_-+o^
private static String[] name={ 1TJ0D_,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0~A#>R'
}; eb:A1f4L
<>&=n+i
private static Sort[] impl=new Sort[]{ {eZ{]
new InsertSort(), t1]6(@mj5
new BubbleSort(), qk{'!Ii
new SelectionSort(), %HuyK
new ShellSort(), "cUg>a3
new QuickSort(), i2,U,>.
new ImprovedQuickSort(), 1JS2SxF
new MergeSort(), 7!V@/S}7
new ImprovedMergeSort(), cgZaPw2 bw
new HeapSort() D@54QJ<
}; J\co1kO9/
n@>wwp
public static String toString(int algorithm){ $^%N U
return name[algorithm-1]; 0%C^8%(x
} C0C0GqN,
H'g?llh1J
public static void sort(int[] data, int algorithm) { fv'4f$U
impl[algorithm-1].sort(data); 85Y|CN] vQ
} X)Gp7k1w
Ww9;UP'G
public static interface Sort { j BS4vvX?
public void sort(int[] data); .(Y6$[#@
} XX;6 P
htJuGfDx1
public static void swap(int[] data, int i, int j) { 4jwu'7Q
int temp = data; =7/-i
data = data[j]; = 1|"-
data[j] = temp; [Eq<":)
} d"<F!?8
} [s6C ZcL