[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; 4sY[az
} 9rj('F&1
int i1=l; &R]pw`mTH
int i2=mid+1; f[/.I,9U^
for(int cur=l;cur<=r;cur++){ >M^&F6
if(i1==mid+1) G_oX5:J*
data[cur]=temp[i2++]; $fArk36O#
else if(i2>r) |uha 38~
data[cur]=temp[i1++]; `ypL]$cW
else if(temp[i1] data[cur]=temp[i1++]; Md(JIlh3
else q&M:17+:Q
data[cur]=temp[i2++]; 2tr :xi@
} 9\51Z:>
} J6|JWp
qMgfMhQ7DU
} hN4VlNKu
&zN@5m$k;
改进后的归并排序: `!c,y~r[
SfI*bJo>V
package org.rut.util.algorithm.support; 9G:TW|)L[Q
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import org.rut.util.algorithm.SortUtil; *m_93J
Fn,k!q
/** vnsSy33K
* @author treeroot (DJvi6\H
* @since 2006-2-2 >a]t<
* @version 1.0 ' Js?N
*/ eOrYa3hQ
public class ImprovedMergeSort implements SortUtil.Sort { QP\yaPE
J~J@ ]5/
private static final int THRESHOLD = 10; N_vXYaY
;/Q6i
/* \REc8nsLy
* (non-Javadoc) d7~j^v)=^
* 9y+[o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [,7-w
*/ nUqy1(
public void sort(int[] data) { Z\!rH"8
int[] temp=new int[data.length]; q:yO92Ow
mergeSort(data,temp,0,data.length-1); 4;\Y?M}g?
} `C<F+/q
{,f[r*{Y
private void mergeSort(int[] data, int[] temp, int l, int r) { *-z4<LAa
int i, j, k; 94z8B;+H]
int mid = (l + r) / 2; qz:]-A
if (l == r) A[9NP-~
return; a;&}zcc*
if ((mid - l) >= THRESHOLD) vXubY@k2
mergeSort(data, temp, l, mid); t{ H1u
else G^KC&
insertSort(data, l, mid - l + 1); !QTPWA
if ((r - mid) > THRESHOLD) 9r8D*PvS
mergeSort(data, temp, mid + 1, r); 5DSuUEvWcL
else p"KV*D9b
insertSort(data, mid + 1, r - mid); 8*)4"rS
Doj(.wm~
for (i = l; i <= mid; i++) { .Cfp'u%\;
temp = data; #11RLvDQd
} $NCm;0\B|
for (j = 1; j <= r - mid; j++) { P CsK()
temp[r - j + 1] = data[j + mid]; JjDS"hK#
} Gt'/D>FE0
int a = temp[l]; U9F6d!:L7A
int b = temp[r]; sS'{QIRC'
for (i = l, j = r, k = l; k <= r; k++) { 'fl(N2t
if (a < b) { RO$*G jQd
data[k] = temp[i++]; _Y7:!-n}
a = temp; z`@z
} else { 82.HH5Z{
data[k] = temp[j--]; gUb "3g0
b = temp[j]; C M^r|4K
} >Qk97we'9
} ER2V*,n@
} 7V/Zr
I}ndRDz[
/** .pKN4
* @param data &z QWIv
* @param l l]u7.~b
* @param i +Z$a1Y@
*/ cE2Rr
private void insertSort(int[] data, int start, int len) { DCK_F8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rT<1S?jR
} `r9^:TMN
} CwB] )QV?
} 43F^J%G
} :P"9;$FY
:1NYpsd.i
堆排序： ;3 dM@>5[
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package org.rut.util.algorithm.support; X$PS(_M
;Lqm#]C
import org.rut.util.algorithm.SortUtil; I2W{tl
'Dq"e$JM<
/** O E]~@eU
* @author treeroot CL )%p"[x
* @since 2006-2-2 _UaPwJ
* @version 1.0 XJ _%!
*/ ZgK@Fl*k
public class HeapSort implements SortUtil.Sort{ tB!|p6
gvK"*aIj
/* (non-Javadoc) ^:U;rHY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g.=!3e&z%
*/ s1v{~xP
public void sort(int[] data) { %27G2^1
MaxHeap h=new MaxHeap(); H'']J9O
h.init(data); Mi;Tn;3er
for(int i=0;i h.remove(); :g/{(#E@Z
System.arraycopy(h.queue,1,data,0,data.length); {YfYIt=.
} DSTx#*
!Am =v=>
private static class MaxHeap{ 5%#i79z&B
-/1d&
void init(int[] data){ l2r>|CGQ[
this.queue=new int[data.length+1]; vevx|<9,
for(int i=0;i queue[++size]=data; ?SB5b,
fixUp(size); np= J:v4
} %"{?[!C ?
} VJGwd`qo*A
mxZ4 HD{
private int size=0; J (=4
z[%[bs2{
private int[] queue; QZz&1n
x9TuweG
public int get() { ;\1b{-' l
return queue[1]; zabw!@]
} Jr|K>
Cnk#Ioz
public void remove() { &#$2;-q8+
SortUtil.swap(queue,1,size--); "ngSilH?D
fixDown(1); _8Pmv$
} zv&ePq\#
file://fixdown Bc5YW-QD
private void fixDown(int k) { E`U&Z
int j; rE9Ta8j6
while ((j = k << 1) <= size) { se}pdL}
if (j < size %26amp;%26amp; queue[j] j++; `NTM%# w
if (queue[k]>queue[j]) file://不用交换 |)~Ex 9%ev
break; 1*TXDo_T
SortUtil.swap(queue,j,k); dVij <! Lu
k = j; `4se7{'UK`
} Cln^1N0
} &IIJKn|_
private void fixUp(int k) { uv?8V@x2
while (k > 1) { hqdC9?\
int j = k >> 1; .dy#n`eP
if (queue[j]>queue[k]) SjFF=ib
break; &h98.A*&
SortUtil.swap(queue,j,k); &Xj{:s#
k = j; eV@4VxaZ
} sDW"j\
} ly9x1`?$
\65vfE~ O
} qiF@7i
&\CJg'D:m
} 7O;BS}Lv=
3'|Uqf8
SortUtil： ]?v?Qfh2
k^L#,:\&V
package org.rut.util.algorithm; BT y]!%r'
-6.i\ B
import org.rut.util.algorithm.support.BubbleSort; U^vUdM"
import org.rut.util.algorithm.support.HeapSort; tg4LE?nv
import org.rut.util.algorithm.support.ImprovedMergeSort; V'Sd[*
import org.rut.util.algorithm.support.ImprovedQuickSort; t?pIE cl
import org.rut.util.algorithm.support.InsertSort; B<vvsp\X
import org.rut.util.algorithm.support.MergeSort; !Qj)tS#Az
import org.rut.util.algorithm.support.QuickSort; &;SwLDF"1
import org.rut.util.algorithm.support.SelectionSort; ]<&B BQ
import org.rut.util.algorithm.support.ShellSort; @]?? +f}#
:mCw.Jz<h
/** LZ=wz.'u
* @author treeroot <(u3+`f1s
* @since 2006-2-2 iX0]g45o
* @version 1.0 }z9I`6[
*/ a>;3 j
public class SortUtil { +xoyKP!
public final static int INSERT = 1; A52LH,
public final static int BUBBLE = 2; [XA&&EcU
public final static int SELECTION = 3; uOivnJ?
public final static int SHELL = 4; dXf]G6
public final static int QUICK = 5; AQJ|^'%
public final static int IMPROVED_QUICK = 6; )3D+gu
public final static int MERGE = 7; U]`'GM/x
public final static int IMPROVED_MERGE = 8; `2 %eDFZ
public final static int HEAP = 9; ox i a}
gNMKGf\Y
public static void sort(int[] data) { %8rr*l5
sort(data, IMPROVED_QUICK); MbT ONt?~v
} 0{^l2?mgSb
private static String[] name={ <=5,(a5g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;W$w=j: O{
}; tS_xa
8.q13t!D
private static Sort[] impl=new Sort[]{ [N0/">c
new InsertSort(), k8Su/U
new BubbleSort(), JO<gN= [
new SelectionSort(), u`L!za7fi
new ShellSort(), V{a}#J
new QuickSort(), !.tL"U~4
new ImprovedQuickSort(), &"~,V6,q
new MergeSort(), .&* ({UM
new ImprovedMergeSort(), =DmPPl{
new HeapSort() (IO\+
}; LXTipWKz
V)WIfRs
public static String toString(int algorithm){ b7>-aem@I
return name[algorithm-1]; HzgQI
} ?vL^:f["
\pBYWf
public static void sort(int[] data, int algorithm) { @@&@}IQcR1
impl[algorithm-1].sort(data); j:de}!wc
} &\WkJ}&PnA
n{qa]3
public static interface Sort { "R\\\I7u
public void sort(int[] data); ^Yf)lV&[
} dctA`W@:-
fmZzBZ_
public static void swap(int[] data, int i, int j) { Q9x` Uy
int temp = data; MZ|c7f&`
data = data[j]; jiw`i
data[j] = temp; R"8})a gw
} ^,ZvKA"}+/
} ya*q;D