[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; &9fQW?Czs
} ?_i>Kx
int i1=l; V~ORb1
int i2=mid+1; *=.~PR6W{
for(int cur=l;cur<=r;cur++){ }Sbk qd5
if(i1==mid+1) owQ,op#
data[cur]=temp[i2++]; /Pkz3(1
else if(i2>r) y<E];ub
data[cur]=temp[i1++]; sQac%.H;`U
else if(temp[i1] data[cur]=temp[i1++]; #79[Qtkrhm
else k$JOHru
data[cur]=temp[i2++]; *LU/3H|}
} ao"2kqa)r
} 6Eu(C]nC(
>ItT269G
} )38%E;T{X
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改进后的归并排序: FV/t
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package org.rut.util.algorithm.support; .8u@/f%pV
9K/EteS
import org.rut.util.algorithm.SortUtil; W>C?a=r~
YnRO>`
/** dN)8r
* @author treeroot T7.Iqw3p
* @since 2006-2-2 oDMPYkpTu
* @version 1.0 XhHgXVVGG<
*/ OyF=G^w
public class ImprovedMergeSort implements SortUtil.Sort { h_[{-WC
}!oEjcX'
private static final int THRESHOLD = 10; .i I{
T+ZA"i+
/* hdHz", )
* (non-Javadoc) 1o%#kf
* 3Iv^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CqlxE/|
*/ Y?NL|cW4
public void sort(int[] data) { 9hfg/3t('
int[] temp=new int[data.length]; =g9n =spAn
mergeSort(data,temp,0,data.length-1); WSu6chz)
} kpIn_Ea
Z%]K,9K
private void mergeSort(int[] data, int[] temp, int l, int r) { jez0 A
int i, j, k; gVfFEF.
int mid = (l + r) / 2; ,3Q~X$f
if (l == r) jRU:un4
return; 6dR+qJa6i
if ((mid - l) >= THRESHOLD) >5Yn`Fc5
mergeSort(data, temp, l, mid); k`8O/J
else t4_yp_
insertSort(data, l, mid - l + 1); aC\f;&P>
if ((r - mid) > THRESHOLD) b;UBvwY_
mergeSort(data, temp, mid + 1, r); tfGs|x
else j'z#V_S
insertSort(data, mid + 1, r - mid); W_`]7RO8
x2"1,1%H7
for (i = l; i <= mid; i++) { rM,e$
temp = data; ,s#~00C|
} E5n7 <
for (j = 1; j <= r - mid; j++) { $qQYxx@
temp[r - j + 1] = data[j + mid]; ]O"f%
} E=ijt3
int a = temp[l]; .Rk8qRB
int b = temp[r]; k i<X^^
for (i = l, j = r, k = l; k <= r; k++) { 9f( X7kt
if (a < b) { :}zyd;Rc
data[k] = temp[i++]; 0]|`*f&p;
a = temp; @F<{/|P
} else { Wn(!6yid
data[k] = temp[j--]; U]sAYp^$
b = temp[j]; SWV*w[X<X
} U.Mfu9}#:
} V2Vr7v=Y"
} f[k#Znr
iH }-
/** Xkhd"Axi
* @param data *=!e,
* @param l .P)lQk\
* @param i ~DInd-<5
*/ o:AfEoH"~
private void insertSort(int[] data, int start, int len) { %;k Hnl
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); VO|ECB2e
} w+R/>a(]
} 2F:qaz
} z3+@[I$
} .d1ff];
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堆排序： .C% 28fH
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package org.rut.util.algorithm.support; mQ:{>`
q,,
import org.rut.util.algorithm.SortUtil; \0b}Z#'0
$9,&BW_*
/** LgNIb
* @author treeroot &W@2n&U.q
* @since 2006-2-2 ^z{szy?Fg
* @version 1.0 {|?^@
*/ '[{<aEo
public class HeapSort implements SortUtil.Sort{ UucI>E3?P{
X/~uF9a'<
/* (non-Javadoc) b"h'7C/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jbu2y'zE
*/ $y8-JR~
public void sort(int[] data) { 1D*=ZkA)
MaxHeap h=new MaxHeap(); 1|MRXK
h.init(data); ]y0Y(
for(int i=0;i h.remove(); h3CA,$HJ
System.arraycopy(h.queue,1,data,0,data.length); SndR:{
} ODxZO3
WTfjn|a
private static class MaxHeap{ m\`>N_4*9
f jx`|MJ
void init(int[] data){ nqyD>>
this.queue=new int[data.length+1]; _? gCOr
for(int i=0;i queue[++size]=data; xqG<R5k>>
fixUp(size); bE_8NA"2
} ;,&cWz
} 3v8LzS3@
vgwpuRL5b
private int size=0; n3a.)tcC
_%nz-I
private int[] queue; RuPnWx!
.Kb3VNgwvm
public int get() { HuevDy4
return queue[1]; `L'g<VK;
} dvB=Zk]m
/|0-O''
public void remove() { BX >L7n
SortUtil.swap(queue,1,size--); sey,J5?
fixDown(1); %k!CjW3
} a`!Jq'
file://fixdown "n%s>@$
private void fixDown(int k) { Oidf\%!mvR
int j; +hyOc|5
while ((j = k << 1) <= size) { ^m qEKy<
if (j < size %26amp;%26amp; queue[j] j++; JusU5 e|
if (queue[k]>queue[j]) file://不用交换 EwP2,$;
break; 'UX.Q7W
SortUtil.swap(queue,j,k); |b
k = j; SI}s
} E/zf9\
} r]3-}:vU
private void fixUp(int k) { ]@{Lx>Oh"
while (k > 1) { my?Ly(#
int j = k >> 1; I!sT=w8V
if (queue[j]>queue[k]) &$MC!iMh
break; n>Ff tVZNJ
SortUtil.swap(queue,j,k); en<~_|J
k = j; Xh9QfT,
} zPby+BP
} kBo:)Vej4
?KC(WaGJQ
} x)PW4{3qR
\9?[|m z
} 5n@YNaoIb
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SortUtil： ]\(8d[4
s4|\cY`b-
package org.rut.util.algorithm; /(dP)ysc
|mEWN/@C
import org.rut.util.algorithm.support.BubbleSort; ,Bk5(e
import org.rut.util.algorithm.support.HeapSort; ]~TsmR[
import org.rut.util.algorithm.support.ImprovedMergeSort; }HgG<.H>
import org.rut.util.algorithm.support.ImprovedQuickSort; @>2pY_
import org.rut.util.algorithm.support.InsertSort; +9_Y0<C
import org.rut.util.algorithm.support.MergeSort; &hOz(825r
import org.rut.util.algorithm.support.QuickSort; -%asHDQ{
import org.rut.util.algorithm.support.SelectionSort; ] ,|,/~
import org.rut.util.algorithm.support.ShellSort; QaWS%0go
1JJsYX
/** owAO&"C
* @author treeroot $dL..QH^K
* @since 2006-2-2 y* +y&
* @version 1.0 Y}?8
*/ ula-o)S
public class SortUtil { DR#" 3
public final static int INSERT = 1; 5UEZpxnv
public final static int BUBBLE = 2; /v{+V/'+
public final static int SELECTION = 3; qN!oN*
public final static int SHELL = 4; t-\+t<;
public final static int QUICK = 5; Q0U~s\<
public final static int IMPROVED_QUICK = 6; wI%M3XaBws
public final static int MERGE = 7; B8@mL-Z-;
public final static int IMPROVED_MERGE = 8; i^s Vy
public final static int HEAP = 9; &.)=>2
|2(q9j
public static void sort(int[] data) { ;ArwEzo(
sort(data, IMPROVED_QUICK); @Cj!MZ=T
} $RD~,<oEm
private static String[] name={ ?cV,lak
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zm_8a!.
}; feej'l }F
2dn^K3
private static Sort[] impl=new Sort[]{ \nl(tU#j
new InsertSort(), SI7rTJ]/
new BubbleSort(), 3c<aI=$^
new SelectionSort(), 78&|^sq
new ShellSort(), "5hk%T'
new QuickSort(), Xaq;d'
new ImprovedQuickSort(), hkMeUxS
new MergeSort(), 0m@+ &X>w
new ImprovedMergeSort(), -Jd|H*wWo
new HeapSort() QS#@xhH
}; n:@!vV
vW+6_41ZM
public static String toString(int algorithm){ `ecseBn3d
return name[algorithm-1]; Bx?3E^!T
} @v-^j
}[p{%:tP
public static void sort(int[] data, int algorithm) { iJs~NLCgVu
impl[algorithm-1].sort(data); {:X'9NEE
} vX+oZj
DX_mrG
public static interface Sort { i)i>Ulj*i
public void sort(int[] data); y{<e4{ !
} !<[+u
Xoj"rR9|
public static void swap(int[] data, int i, int j) { h]4xS?6O
int temp = data; X~{6$J|]#i
data = data[j]; ",#.?vT`
data[j] = temp; sx,$W3zI'G
} "HOZ2_(o
} Sn=6[RQ>P