[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; i5VG2S
} nEyIt&>9
int i1=l; SY|Ez!tU:N
int i2=mid+1; uOre,AQR
for(int cur=l;cur<=r;cur++){ 6"+8M 3M l
if(i1==mid+1) /BT1oWi1y
data[cur]=temp[i2++]; =U c$D*
else if(i2>r) -;U3w.-
data[cur]=temp[i1++]; EX+,:l\^
else if(temp[i1] data[cur]=temp[i1++]; gB >pd?d
else H]]c9`ayt
data[cur]=temp[i2++]; ~z`/9;
} 5 < GDW=
} *i@T!O(1)M
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} ;NP[_2|-,
R*\~k%Z
改进后的归并排序: F"[3c6yF
"S(yZ6r"
package org.rut.util.algorithm.support; p-Pz=Cx-
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import org.rut.util.algorithm.SortUtil; ?@DNsVwb
nj
/** E(;i>
* @author treeroot x2m]Us@LIU
* @since 2006-2-2 LipxAE?O
* @version 1.0 9~~UM<66W
*/ np=kTJ
public class ImprovedMergeSort implements SortUtil.Sort { `iQqhx
wVE:X3Ei
private static final int THRESHOLD = 10; M~p=#V1D
(Q_2ODKo
/* K$ AB} Fvc
* (non-Javadoc) 1`QsW&9=b
* lQL:3U0DjU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tr=@+WHp
*/ gz4UV/qr/
public void sort(int[] data) { d;44;*D
int[] temp=new int[data.length]; a:b^!H>#
mergeSort(data,temp,0,data.length-1); M(2`2-/xh
} mW +tV1XjG
Yf=FeH7"
private void mergeSort(int[] data, int[] temp, int l, int r) { UJn/s;$.e
int i, j, k; 8gI\zgS
int mid = (l + r) / 2; 5(#-)rlGj
if (l == r) VMF|iB
return; t%$@fjz
if ((mid - l) >= THRESHOLD) 1a8$f5
mergeSort(data, temp, l, mid); 5r7h=[N
else $H;+}VQ
insertSort(data, l, mid - l + 1); KoF iQ?
if ((r - mid) > THRESHOLD) gc,Ps
mergeSort(data, temp, mid + 1, r); 8^vArS;
else !M^\f N1
insertSort(data, mid + 1, r - mid); !DcX8~~@
+$,dwyI2t
for (i = l; i <= mid; i++) { >|nt2
temp = data; V.2[ F|P;3
} CL1;Inzl
for (j = 1; j <= r - mid; j++) { 7=3O^=Q^Q
temp[r - j + 1] = data[j + mid]; hy!6g n
} n|C|&
int a = temp[l]; o_rtH|ntX5
int b = temp[r]; 6pm~sD
for (i = l, j = r, k = l; k <= r; k++) { x5F@ad9
if (a < b) { Vhph`[dC{
data[k] = temp[i++]; aS/`A
a = temp; mp:m`sh*i
} else { L;yEz[#xaT
data[k] = temp[j--]; uA%Ts*aN
b = temp[j]; 0H+c4IW
} #8UseK
} P7r4ePtLk{
} $ S~%KsC
ET+'Pj3
/** iaRR5D-
* @param data %w:'!X><
* @param l @n@g)`
* @param i =:/>6H1x
*/ L$hc,
private void insertSort(int[] data, int start, int len) { R@n5AN(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rJV?)=Z
} vi|Zit
} |_nC6;
} +nQ!4
} }p{;^B
*8UYSA~v
堆排序： yoU2AMH2D^
1R^4C8*B
package org.rut.util.algorithm.support; @ef$b?wg
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import org.rut.util.algorithm.SortUtil; oyW00]ka
&^+3errO
/** u`6/I#q`
* @author treeroot i6 L
* @since 2006-2-2 F`srE6H
* @version 1.0 EneAX&SG
*/ q,@+^aZ
public class HeapSort implements SortUtil.Sort{ @\PpA9ebg%
qpTm
/* (non-Javadoc) W_m!@T"@H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MS{{R+&
*/ 74]a/'4
public void sort(int[] data) { @d)LRw.I
MaxHeap h=new MaxHeap(); Tq#<Po $
h.init(data); N7pt:G2~%
for(int i=0;i h.remove(); q^]tyU!w
System.arraycopy(h.queue,1,data,0,data.length); Q!]IG;3Sx|
} (YrR8
^IgS
private static class MaxHeap{ :H\&2/j
:~33U)?{T
void init(int[] data){ $T/#1w P
this.queue=new int[data.length+1]; = t-fYV
for(int i=0;i queue[++size]=data; PCZ]R
fixUp(size); +6376$dC
} @/(@/*+"
} LzE/g)>
$iHoOYx]<
private int size=0; ZqP7@fO_%
#TATqzA
private int[] queue; +c r
1|/'"9v
public int get() { Rf:<-C0T
return queue[1]; J#(,0h
} _.=`>%,
[TEcg^
public void remove() { Z(UD9wY5m
SortUtil.swap(queue,1,size--); 4|F#gK5E
fixDown(1); 8}z3CuM
} 4 l1 i>_R
file://fixdown @G(xaU'u
private void fixDown(int k) { &-4 ?!
int j; ~},~c:fF?
while ((j = k << 1) <= size) { :d({dF_k;p
if (j < size %26amp;%26amp; queue[j] j++; Q"'V9m7 i
if (queue[k]>queue[j]) file://不用交换 zDd5cxFdZ
break; C fSl 54
SortUtil.swap(queue,j,k); n}:t<
k = j; AsAFUuI
} n.Vtc-yZU
} "*bk{)dz}
private void fixUp(int k) { bP03G=`6w
while (k > 1) { lC2?sD$
int j = k >> 1; P}l#VJWp
if (queue[j]>queue[k]) _uJVuCc
break; >HIt}Zh
SortUtil.swap(queue,j,k); r`[B@
k = j; J|q^+K
} BkV(81"C
} jN{Zw*
0d`5Gy_D%
} M8zE3;5
gD1+]am
} cUsL6y
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SortUtil： [?I/Uo8
Vrg3{@$
package org.rut.util.algorithm; JT#7yetk'
B0"0_n7-
import org.rut.util.algorithm.support.BubbleSort; HT&p{7kFm
import org.rut.util.algorithm.support.HeapSort; $l#{_~ "m7
import org.rut.util.algorithm.support.ImprovedMergeSort; '%ebcL
import org.rut.util.algorithm.support.ImprovedQuickSort; Efvq?cG&
import org.rut.util.algorithm.support.InsertSort; CrO`=\
import org.rut.util.algorithm.support.MergeSort; ]hKgA~;
import org.rut.util.algorithm.support.QuickSort; ]4GZ'&m}
import org.rut.util.algorithm.support.SelectionSort; obYn&\6
import org.rut.util.algorithm.support.ShellSort; KK$ a;/
[ t$AavU.
/** 4(8<w cL
* @author treeroot FW5}oD(H
* @since 2006-2-2 yp?w3|`4;
* @version 1.0 hv{87`L'K(
*/ pX^=be_
public class SortUtil { [,GU5,o
public final static int INSERT = 1; b"&E,=L
public final static int BUBBLE = 2; y<v|X2
public final static int SELECTION = 3; T g{UK
public final static int SHELL = 4; cyHU\!Z*Zq
public final static int QUICK = 5; X\mz+al>[
public final static int IMPROVED_QUICK = 6; IhwN],-V
public final static int MERGE = 7; 2!idy]vy_
public final static int IMPROVED_MERGE = 8; P>fKX2eQ-
public final static int HEAP = 9; Wz5=(<{S
-_HRqw,Z0
public static void sort(int[] data) { j9>TTgy@
sort(data, IMPROVED_QUICK); wB2}uk7
} o~k;D{Snr
private static String[] name={ vS#{-X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @ge LW!
}; ]/[0O+B?
{!y<<u1
private static Sort[] impl=new Sort[]{ Tm\OYYyk
new InsertSort(), }biCQ*{'
new BubbleSort(), ZqFUPHc
new SelectionSort(), ?lyltAxs'
new ShellSort(), c(CJ{>F%
new QuickSort(), ]$|st^Q
new ImprovedQuickSort(), S QSA%B$<
new MergeSort(), WDvV LU`
new ImprovedMergeSort(), Pfk{=y
new HeapSort() Mn{XVXY@qm
}; R~cIT:i
p&uCp7]U
public static String toString(int algorithm){ a-:pJE.'p
return name[algorithm-1]; 716hpj#*
} OiF]_"
RJLFj
public static void sort(int[] data, int algorithm) { A-;^~I
impl[algorithm-1].sort(data); ^F&A6{9f/h
} 3@'lIV ?,q
^1Yo-T(R
public static interface Sort { uD[^K1Ag]^
public void sort(int[] data); 0H<4+ *`K
} Z7oaQ\fR
@f%wd2
public static void swap(int[] data, int i, int j) { )lOji7&e
int temp = data; =nw0# '
data = data[j]; u X>PefR
data[j] = temp; '(XW$D
} 4Lw'v:(
} x.o3iN[=