[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; bjT0Fi0-
} (/*-M]>
int i1=l; e:7aVOm
int i2=mid+1; ae!_u \$
for(int cur=l;cur<=r;cur++){ qA30z%#z_
if(i1==mid+1) W2^eE9
data[cur]=temp[i2++]; R:ar85F
else if(i2>r) V;:A&
data[cur]=temp[i1++]; 0]HK(,/h
else if(temp[i1] data[cur]=temp[i1++]; q0c)pxD%`
else }+=@Ci
data[cur]=temp[i2++]; {?L}qV
} Q o=
} 4P:vo$Cy
KPO((G0&
} wK\SeX
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改进后的归并排序: fV5#k@,")
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package org.rut.util.algorithm.support; u8,T>VNVw
pEaH^(I*
import org.rut.util.algorithm.SortUtil; G:&Q)_
92tb`'
/** dl;A'/(t
* @author treeroot C3<3
* @since 2006-2-2 jyT(LDsS
* @version 1.0 PCIC*!{
*/ eb8_guZ
public class ImprovedMergeSort implements SortUtil.Sort { H{$yy)@F
oDP|>yXC)
private static final int THRESHOLD = 10; =VSieh
:m~lgb<
/* X>B/DT
* (non-Javadoc) $fn^i.
* l3MH+o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pKJ[e@E^
*/ "bO]
public void sort(int[] data) { q_K1L
int[] temp=new int[data.length]; Fca?'^X
mergeSort(data,temp,0,data.length-1); c~C W-%wN
} *K7L5.
d+w<y~\ q
private void mergeSort(int[] data, int[] temp, int l, int r) { @kK=|(OB'
int i, j, k; Z:OO|x
int mid = (l + r) / 2; ~iSW^mi
if (l == r) VcL
return; Nl8Cctrf
if ((mid - l) >= THRESHOLD) bpILiC
mergeSort(data, temp, l, mid); 0CR;t`M@
else iUKj:q:
insertSort(data, l, mid - l + 1); %)e+w+
if ((r - mid) > THRESHOLD) \X`P W
mergeSort(data, temp, mid + 1, r); !(~>-;A8
else 7wnzef?)
insertSort(data, mid + 1, r - mid); sDC RL%0QK
:Ry24X
for (i = l; i <= mid; i++) { z~_\onC
temp = data; !<)_ F
} +OmSR*fA0
for (j = 1; j <= r - mid; j++) { Y^G3<.B
temp[r - j + 1] = data[j + mid]; 4ca-!pI0
} buFtLPe
int a = temp[l]; Y[DKj!v
int b = temp[r]; KWUz]>Z
for (i = l, j = r, k = l; k <= r; k++) { Ed-gYL^<
if (a < b) { a8 1%M
data[k] = temp[i++]; 6.jZy~
a = temp; yM2&cMHH~
} else { 5HN<*u%z
data[k] = temp[j--]; 85 hYYB0v
b = temp[j]; 7y\g~?5N
} 8iNAs#s
} z,)sS<t(
} 6~S0t1/t?
c v 9 6F
/** w-$w
* @param data =1VH5pVr}
* @param l D2p6&HNT
* @param i j1<1D@UO
*/ ,LZ:y1z'V-
private void insertSort(int[] data, int start, int len) { >B
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^j %UZ
} E'8Bw7Tz
} =@ZtUjcJx
} ArYF\7P
} 5KR|pFq
W<VHv"?V
堆排序： zIFL?8!H9{
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package org.rut.util.algorithm.support; ;l()3;
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import org.rut.util.algorithm.SortUtil; % eRwH >
[r8 d+
/** 17)M.(qmuP
* @author treeroot hhAC@EGG
* @since 2006-2-2 2H[aY%1T
* @version 1.0 ssITe.,ny
*/ QJWES%m`
public class HeapSort implements SortUtil.Sort{ o(/ia3
3SDWR@x&
/* (non-Javadoc) L0b]^_tI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +c`C9RXk
*/ X&.$/xaT
public void sort(int[] data) { PV6*-[
MaxHeap h=new MaxHeap(); [E (M(w':
h.init(data); ~@b}=+n
for(int i=0;i h.remove(); /kU@S
System.arraycopy(h.queue,1,data,0,data.length); Az9J{)
} $S8bp3)
So%1RY{)
private static class MaxHeap{ }#>d2 =T$
/%9p9$kFot
void init(int[] data){ 8;\tP29
this.queue=new int[data.length+1]; up3<=u{>
for(int i=0;i queue[++size]=data; 8/?uU]#Q
fixUp(size); -!G#")<
} u6I0<i_KZ
} X1[R*a/p
;To+,`?E;q
private int size=0; NvHy'
vKf;&`^qE
private int[] queue; #'Y6UGJ\n
ZX6=D>)u
public int get() { JvJ!\6Q@
return queue[1]; OGi4m |
} -_*XhD
*5'6E'
public void remove() { 'A(-MTd%
SortUtil.swap(queue,1,size--); 2a(yR>#
fixDown(1); o p5^9`"
} ~uZLe\>K
file://fixdown 2j/1@Z1j=
private void fixDown(int k) { x*"pDI0k)
int j; LOUKUReE
while ((j = k << 1) <= size) { X`v79`g_
if (j < size %26amp;%26amp; queue[j] j++; 2X;0z$
if (queue[k]>queue[j]) file://不用交换 i~Ob( YIH
break; iLd"tn'
SortUtil.swap(queue,j,k); UNcJ=
k = j; u3i|}`
} '"fU2M<.
} q{Ta?|x#
private void fixUp(int k) { bb0McEQy
while (k > 1) { J(&M<<%
int j = k >> 1; (zro7gKked
if (queue[j]>queue[k]) ])ALAAIc-
break; `_g?y)
SortUtil.swap(queue,j,k); CbH T #
k = j; {{[jC"4AY
} MV;Y?%>
} 8&A|)ur4
>7(~'#x8A"
} zTBi{KrZ
am'p^Z@
} Zc\h15+P
6=g]Y!o$
SortUtil： #9hXZr/8
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package org.rut.util.algorithm; zEPx
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import org.rut.util.algorithm.support.BubbleSort; o +QzQ+ Z
import org.rut.util.algorithm.support.HeapSort; ~ut& U
import org.rut.util.algorithm.support.ImprovedMergeSort; o )nT
import org.rut.util.algorithm.support.ImprovedQuickSort; <E7Vbb9*
import org.rut.util.algorithm.support.InsertSort; Va/@#=,q]
import org.rut.util.algorithm.support.MergeSort; K'{W9~9Lq
import org.rut.util.algorithm.support.QuickSort; 1nlE3Y?AV
import org.rut.util.algorithm.support.SelectionSort; R!V5-0%
import org.rut.util.algorithm.support.ShellSort; $YGIN7_Gg
$kD`$L@U
/** mb~=Xyk&
* @author treeroot Xx y Bg!R
* @since 2006-2-2 ofPF}
* @version 1.0 y5AXL5
*/ H6PXx
public class SortUtil { 6Er0o{iI
public final static int INSERT = 1; l`M5'r]l
public final static int BUBBLE = 2; eA*Jfb
public final static int SELECTION = 3; gM;)
public final static int SHELL = 4; f?>-yMR|
public final static int QUICK = 5; ]2xx+P#Y
public final static int IMPROVED_QUICK = 6; _sf#J|kQ
public final static int MERGE = 7; we H@S
public final static int IMPROVED_MERGE = 8; z"s%#/#
public final static int HEAP = 9; S4{Mu(^xT
0,~6TV<K
public static void sort(int[] data) { WK_y1(v>
sort(data, IMPROVED_QUICK); /50g3?X,
} _r<zSH%
private static String[] name={ 7{Ki;1B[w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" b5n]Gp
}; _']%qd"%
/mMAwx
private static Sort[] impl=new Sort[]{ ni"$[8U
new InsertSort(), {#w A!>.
new BubbleSort(), 22al
new SelectionSort(), MR?*GI's
new ShellSort(), ~_l6dDJ
new QuickSort(), j5,^9'
new ImprovedQuickSort(), n,&/D
new MergeSort(), wZo.ynXT
new ImprovedMergeSort(), T<TcV9vM
new HeapSort() x!"SD3r=4>
}; !y qa?\v9
~$&:NB1~q
public static String toString(int algorithm){ '#,e @v
return name[algorithm-1]; f.aB?\"f6
} w'oo-.k
`?zg3GD_
public static void sort(int[] data, int algorithm) { X6LhM
impl[algorithm-1].sort(data); gnQo1q{ 4
} n) _dH/"
Ge^zX$.'
public static interface Sort { Ci7P%]9
public void sort(int[] data); `2xH7a-
} %1-K);SJ
sJ))<,e5I
public static void swap(int[] data, int i, int j) { vU_d=T%$
int temp = data; T3USNc51
data = data[j]; W>5vRwx00
data[j] = temp; :]CzN^k(1c
} KGV.S
} 8)^B32