[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; _$cQAH0 E
} ?)]sfJG
int i1=l; zw5EaY
int i2=mid+1; c%xxsq2n
for(int cur=l;cur<=r;cur++){ )x( *T
if(i1==mid+1) AqN(htGvx
data[cur]=temp[i2++]; v`wPdb
else if(i2>r) QZh8l-!#5
data[cur]=temp[i1++]; /x$jd)C
else if(temp[i1] data[cur]=temp[i1++]; <6(u%t0k5
else r\Man'h$
data[cur]=temp[i2++]; WqYl=%x"{V
} %eD&2$q*
} 3l4k2
UKX'A)$
} >Pv%E
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改进后的归并排序: N.&)22<m9
@Chj0wWZ>
package org.rut.util.algorithm.support; YjHGdacs
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import org.rut.util.algorithm.SortUtil; ig?]kZ
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/** ]&}?J:+?0E
* @author treeroot <Xl G:nmY
* @since 2006-2-2 YciZU
* @version 1.0 (/qY*?
*/ J3q}DDnEo
public class ImprovedMergeSort implements SortUtil.Sort { o<C~67o_
]t#,{%h
private static final int THRESHOLD = 10; 4<lZ;M"
1%1-j
/* (5Cm+Sy
* (non-Javadoc) r/{0YFa
* jq}5(*k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ={zYcVI
*/ >aa-ix &
public void sort(int[] data) { [$] JvF
int[] temp=new int[data.length]; ;Vp&f%u+v
mergeSort(data,temp,0,data.length-1); m4 4aKqw)
} E"u>&uPH
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private void mergeSort(int[] data, int[] temp, int l, int r) { !sR`]0
int i, j, k; E; RI.6y
int mid = (l + r) / 2; @x{;a9y
if (l == r) hV=)T^Q
return; :k(aH Ua
if ((mid - l) >= THRESHOLD) ["@K~my~D*
mergeSort(data, temp, l, mid); lHP[WO
else 8.9S91]=
insertSort(data, l, mid - l + 1); "J[Crm
if ((r - mid) > THRESHOLD) Gia_B6*Y[
mergeSort(data, temp, mid + 1, r); :[AW
else 0eUsvzz15
insertSort(data, mid + 1, r - mid); B}*xrPj
N2~DxVJ5cT
for (i = l; i <= mid; i++) { L\n_q6n
temp = data; 6.K)uQgjmv
} vk[Km[(U'
for (j = 1; j <= r - mid; j++) { @$~%C) %u
temp[r - j + 1] = data[j + mid]; #]:nQ(
} 4'X^YBm
int a = temp[l]; fmloh1{4
int b = temp[r]; iCw~4KG
for (i = l, j = r, k = l; k <= r; k++) { _jnH!Mw
if (a < b) { zeR!Y yt!
data[k] = temp[i++]; x:?1fvVR
a = temp; *4r;H2%c
} else { ii~~xt1
data[k] = temp[j--]; (<3'LhFII
b = temp[j]; e#16,a-}o
} ~BZA_w"`1
} 501|Y6ptl
} AZtZa'hbkQ
&|gn%<^
/** j_ :4_zdBy
* @param data Iy`Zh@"~
* @param l )8LCmvQ
* @param i Zkxt>%20~
*/ x2K.5q>
private void insertSort(int[] data, int start, int len) { jQ7RH/?_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y{2\==~
} .s,hl(w,
} QEtZ]p1H@
} r%TgZ5~u
} 8HTV"60hTs
oYqlN6n,=6
堆排序： b]*9![_
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package org.rut.util.algorithm.support; bCE[oi6hb
!&19%C4
import org.rut.util.algorithm.SortUtil; `Jz"rh-M
9~>;sjJk
/** S W
* @author treeroot 4$vya+mAk5
* @since 2006-2-2 L!/USh:IP
* @version 1.0 qW7S<ouh
*/ @gs Kb*,
public class HeapSort implements SortUtil.Sort{ sFB; /*C
-*tP_=-Dg
/* (non-Javadoc) xt40hZ$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {)jQbAr(G
*/ ZmYp!B_~
public void sort(int[] data) { \!s0VEE
MaxHeap h=new MaxHeap(); P3@[x
h.init(data); )zen"](cze
for(int i=0;i h.remove(); {$Fg+~
System.arraycopy(h.queue,1,data,0,data.length); Az"3f
} KWhw@y-5j@
hv7!x=?8
private static class MaxHeap{ ks'25tv}F
I[&z#foN=w
void init(int[] data){ iVnrv`k,
this.queue=new int[data.length+1]; c+-L>dsss
for(int i=0;i queue[++size]=data; PZH]9[H
fixUp(size); KqaeRs.u
} {w{|y[[d~
} zneK)C8&q3
`@=}5 9+|
private int size=0; `<+D<x)(3
1 !OQxY}f
private int[] queue; voV=}.(p
#p*OLQ3~
public int get() { <[[DS%(M^
return queue[1]; i>0I '~V
} T4qbyui{
8|V6RgA%
public void remove() { RR^I*kRH
SortUtil.swap(queue,1,size--); hRGK W
fixDown(1); Q|+m)A4@
} xdp{y=,[
file://fixdown "D8xHHb
private void fixDown(int k) { S1%{/w
int j; 0Q%'vBX\`
while ((j = k << 1) <= size) { wdoA>a?q
if (j < size %26amp;%26amp; queue[j] j++; }"Y]GH4Y
if (queue[k]>queue[j]) file://不用交换 yq\)8Fe
break; =4+UX*&i?.
SortUtil.swap(queue,j,k); b 3D:w{l
k = j; 'Ys"yY@
} BJ~Q\Si6
} j08|zUe
private void fixUp(int k) { 8uS1HE\%
while (k > 1) { LDr!d1A
int j = k >> 1; D@5&xd_@4
if (queue[j]>queue[k]) Zdj~B1
break; B,|M
SortUtil.swap(queue,j,k); J'^BxN&
k = j; ANp4yy+
} qmOGsj`#
} %w6> 3#e
fC]+C(*d
} _N9yC\
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} -!(3fO:
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SortUtil： Z]uN9c
J0mY=vX
package org.rut.util.algorithm; +*!oZKm.
f(?>z!n0
import org.rut.util.algorithm.support.BubbleSort; k;;?3)!
import org.rut.util.algorithm.support.HeapSort; REnRpp$
import org.rut.util.algorithm.support.ImprovedMergeSort; qC.jXU?rO
import org.rut.util.algorithm.support.ImprovedQuickSort; ;QREwT~H
import org.rut.util.algorithm.support.InsertSort; +lO Y IQ
import org.rut.util.algorithm.support.MergeSort; \qV5mD]"M
import org.rut.util.algorithm.support.QuickSort; >xJt&jW-
import org.rut.util.algorithm.support.SelectionSort; eV1O#FLbi
import org.rut.util.algorithm.support.ShellSort; H:d{Sru
4xe:+sA.N
/** `H+ 7Hj
* @author treeroot ZRD*^9)
* @since 2006-2-2 CHN!o9f
* @version 1.0 ,^:Zf|V
*/ Xdq2.:\
public class SortUtil { V{ra,a*
public final static int INSERT = 1; V*U"OJ%
public final static int BUBBLE = 2; DtXXfp@;
public final static int SELECTION = 3; Rj+}L ~"
public final static int SHELL = 4; G*\wu&7!
public final static int QUICK = 5; ~;wSe[
public final static int IMPROVED_QUICK = 6; 1K09iB
public final static int MERGE = 7; ElqHZ$a?
public final static int IMPROVED_MERGE = 8; 3f eI
public final static int HEAP = 9; [M@i,d-;A
>`'#4!}G5j
public static void sort(int[] data) { OA4NXl'
sort(data, IMPROVED_QUICK); RvYew!n
} }@SZ!-t%rD
private static String[] name={ .Z'CqBr[:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6"-LGK:
}; -NiFO
A{y3yH`#h
private static Sort[] impl=new Sort[]{ 3vQ?vS|2
new InsertSort(), g0cCw2S
new BubbleSort(), Qn[4&nUD
new SelectionSort(), P,CJy|[L
new ShellSort(), onG,N1`+
new QuickSort(), (}gF{@sn
new ImprovedQuickSort(), +g7Iu! cA
new MergeSort(), ;T-i+_
new ImprovedMergeSort(), o@EV>4e y
new HeapSort() "EWU:9\0
}; [WY NA-O
_ nS';48
public static String toString(int algorithm){ }Jh!B|
return name[algorithm-1]; \EUc17
} A9p$5jt7
>(`|oD`,Y
public static void sort(int[] data, int algorithm) { HP*x?|4
impl[algorithm-1].sort(data); ]rZ"5y
} wb"Jj
8kH'ai
public static interface Sort { @l$cZie
public void sort(int[] data); W_O,Kao
} qI:}3b;T
>fdS$,`A
public static void swap(int[] data, int i, int j) { w_/q5]/V-5
int temp = data; *ZKfyn$+~
data = data[j]; &p=|z2 J
data[j] = temp; O 4l[4,`
} 0N_Ma')i
} nU[ROy5