[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; GNIZHyT(O
} vXA+4 ?ZG
int i1=l; >^!qxb-
int i2=mid+1; x<-n}VK\
for(int cur=l;cur<=r;cur++){ equTKM
if(i1==mid+1) 8T2iqqG/1
data[cur]=temp[i2++]; {Al}a`da
else if(i2>r) pMfP3G7V
data[cur]=temp[i1++]; '&<T;V%
else if(temp[i1] data[cur]=temp[i1++]; k'hJ@6eKS
else Gx.iZOOH/
data[cur]=temp[i2++]; 9sR?aW^$,/
} mV58&SZT
} 9)Jc'd|
AzwG_XgM)
} ML|O2e
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改进后的归并排序: ^9g+\W
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package org.rut.util.algorithm.support; @\_l%/z{
:mpR}.^hv
import org.rut.util.algorithm.SortUtil; .^Z^L F
!x, ;&
/** v;r!rZX
* @author treeroot mnwYv..ePz
* @since 2006-2-2 6N^sUc0s
* @version 1.0 >>'t7U##
*/ Lh"!Z
public class ImprovedMergeSort implements SortUtil.Sort { HalkNR-eEm
?[|T"bE5[
private static final int THRESHOLD = 10; e{8j(` (;#
9w%|Nk>=>
/* rps2sXGr
* (non-Javadoc) ^JKV~+ Q
* tBZ&h` V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^3qo%=i
*/ &$!'Cw`,
public void sort(int[] data) { 99<0xN(25
int[] temp=new int[data.length]; m)]A$*`<
mergeSort(data,temp,0,data.length-1); ~BSE8M+r
} bkZ~O=uv$-
lQnl6j
private void mergeSort(int[] data, int[] temp, int l, int r) { cjd Z.jR2
int i, j, k; ylEQeN
int mid = (l + r) / 2; DKcg
if (l == r) \8I>^4t'/
return; C9`J6Uu
if ((mid - l) >= THRESHOLD) K1F,M9 0]
mergeSort(data, temp, l, mid); &?-LL{W{
else 7xmyjy%c
insertSort(data, l, mid - l + 1); vw'`t6
if ((r - mid) > THRESHOLD) ?-"%%#
mergeSort(data, temp, mid + 1, r); n$ri:~s
else (($"XOU
insertSort(data, mid + 1, r - mid); |#r[{2sS
8, >YB+Hb
for (i = l; i <= mid; i++) { z&"-%l.b@}
temp = data; u)DhkF|
} #\Q{?F!4
for (j = 1; j <= r - mid; j++) { %/86}DCfE?
temp[r - j + 1] = data[j + mid]; j70]2NgX
} ZW]Q|vPh4U
int a = temp[l]; 7,\Uk|
int b = temp[r]; m}x&]">9
for (i = l, j = r, k = l; k <= r; k++) { |CC(`<\R
if (a < b) { `@Q%}J
data[k] = temp[i++]; ~BNLzt3%O
a = temp; w_gPX0N}3n
} else { !_EaF`oh(
data[k] = temp[j--]; Mbt}G|;8H7
b = temp[j]; I1H} 5bf3
} >UP{=`
} ed,w-;(n~
} >@2l/x8;
Dn6k,nVh
/** s[V$fvW
* @param data <By6%<JTn
* @param l p8>.Q/4
* @param i ?D].Za^km
*/ Pgy&/-u
private void insertSort(int[] data, int start, int len) { +&W%]KEh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); q+MV@8w
} M>mk=-l
} v}=3
} reyN5n~4U
} zS@"ITy
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堆排序： KPGX/l
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package org.rut.util.algorithm.support; 0L34)W
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import org.rut.util.algorithm.SortUtil; YU89m7cc'
{[~ !6&2(k
/** +fgF &.
* @author treeroot X7I"WC1ncz
* @since 2006-2-2 <p48?+K9
* @version 1.0 ~zklrBn&
*/ y\'t{>U/
public class HeapSort implements SortUtil.Sort{ -%&_LE9ZtS
q;T3bxp+
/* (non-Javadoc) &S}i)Nu6J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;;zKHS
*/ U&fOsx?"
public void sort(int[] data) { U/ncD F%C
MaxHeap h=new MaxHeap(); cxTP4\T\E
h.init(data); rz]0i@ehv'
for(int i=0;i h.remove(); &^ sgR$m
System.arraycopy(h.queue,1,data,0,data.length); >K{/Jx&
} IT,TSs/Y
/t-m/&>
private static class MaxHeap{ +$MNG
H61,pr>
void init(int[] data){ Bi"7FF(z
this.queue=new int[data.length+1]; tylMJ$ 9*.
for(int i=0;i queue[++size]=data; x%ZgLvdp,
fixUp(size); qll)
} ,3G8afo
} EDR;" G(N
ta>:iQa
private int size=0; u,:GJU
(C#9/WO?
private int[] queue; {:&t;5qz^
DiK@>$v
public int get() { i|X ;n
return queue[1]; Azx4+`!-
} q$EicH}k8
IqK??KSC
public void remove() { N[%^0T$
SortUtil.swap(queue,1,size--); (F$V m
fixDown(1); l`L}*Q- 5
} ]8(_{@/
file://fixdown *rO#UE2
private void fixDown(int k) { UV%Al)3
int j; r;`6ML[5Vx
while ((j = k << 1) <= size) { ;d1\2H
if (j < size %26amp;%26amp; queue[j] j++; D6,rb 9
if (queue[k]>queue[j]) file://不用交换 4@PH5z
break; bk E4{P"
SortUtil.swap(queue,j,k); }2Y:#{m
k = j; {g?$u
} _B`'1tNx
} 5;+OpB
private void fixUp(int k) { B\a-Q,Wf
while (k > 1) { 4,m aA
int j = k >> 1; <4z |"(
if (queue[j]>queue[k]) B$aA=+<S
break; :E/]Bjq$;
SortUtil.swap(queue,j,k); {n8mE,;M
k = j; 3^l@!Qw
} +K4d(!Sb
} *%L:soM'Ll
`7qZ6Z3z@
} kP9DCDO`[5
.P\wE";
} +Zu*9&Cx
`}gjfu -'\
SortUtil： vn@9Sqk
SMVn2H@
package org.rut.util.algorithm; fu3/n@L
^PIUA'
import org.rut.util.algorithm.support.BubbleSort; _}.BZ[i
import org.rut.util.algorithm.support.HeapSort; MtC\kTW
import org.rut.util.algorithm.support.ImprovedMergeSort; V6Kw71'9
import org.rut.util.algorithm.support.ImprovedQuickSort; oLEqy
import org.rut.util.algorithm.support.InsertSort; m72r6Yq2@
import org.rut.util.algorithm.support.MergeSort; K_ P08
import org.rut.util.algorithm.support.QuickSort; T]\_[e:'
import org.rut.util.algorithm.support.SelectionSort; K1Ms
import org.rut.util.algorithm.support.ShellSort; Xc;W9e(U
(J8(_MF
/** Tj}H3/2
* @author treeroot J[rpMQ
* @since 2006-2-2 <zE,T@c
* @version 1.0 >K$9(
*/ Uk=jQfA*J
public class SortUtil { b: UTq 7^
public final static int INSERT = 1; [(U:1&x&
public final static int BUBBLE = 2; X>^St&B}fC
public final static int SELECTION = 3; X4LU/f<f
public final static int SHELL = 4; RnV )*
public final static int QUICK = 5; E7-il;`cKn
public final static int IMPROVED_QUICK = 6; g$<Sh.4A
public final static int MERGE = 7; Md_S};!QN6
public final static int IMPROVED_MERGE = 8; 5y;texsj[
public final static int HEAP = 9; -@{5 u d
!E<y:$eH:
public static void sort(int[] data) { e;9Z/);#s
sort(data, IMPROVED_QUICK); }p 0\
} L5/J
private static String[] name={ 6qQdTp{i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [+EmV>Y
}; n46H7e(ej\
]ovP^]]V
private static Sort[] impl=new Sort[]{ ?|LR@M!S7
new InsertSort(), {fe[$KQ
new BubbleSort(), <eP`Lu"
new SelectionSort(), 9frLYJz"
new ShellSort(), !t/I j~o
new QuickSort(), f QSP]?
new ImprovedQuickSort(), 33dHTV
new MergeSort(), &@CcH_d*
new ImprovedMergeSort(), (27bNKr
new HeapSort() v7x%V%K
}; ygoA/*s
Os--@5e
public static String toString(int algorithm){ OKs1irt5
return name[algorithm-1]; 0Z9>%\km_
} ^]}+s(
*#p}>\Y{
public static void sort(int[] data, int algorithm) { T.\=R
impl[algorithm-1].sort(data); ;oW#>!HrY
} *@`Sx'5!
Fd!Np7xw
public static interface Sort { D4nYyj1O3
public void sort(int[] data); 8,unq3
} JB.f7-
M?mPi 3
public static void swap(int[] data, int i, int j) { M4[(.8iE
int temp = data; .d{@`^dh1]
data = data[j]; ,MH/lQq%
data[j] = temp; %mKM9>lf#
} *HiN:30DZ
} wq$+m(