[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; 7=Muq]j2
} our ^J8
int i1=l; `;}`>!8j
int i2=mid+1; A:(|"<lA
for(int cur=l;cur<=r;cur++){ Vbv^@Kp
if(i1==mid+1) 89:nF#
data[cur]=temp[i2++]; cIwX sx
else if(i2>r) w317]-n
data[cur]=temp[i1++]; ="$w8iRU
else if(temp[i1] data[cur]=temp[i1++]; A.r7 ks
else &b#d4p6&l
data[cur]=temp[i2++]; U6/7EOW,
} O6Py
} nKGQU,C
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} $^fF}y6N
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改进后的归并排序: Xq$-&~
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package org.rut.util.algorithm.support; 4JK6<Pk
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import org.rut.util.algorithm.SortUtil; W5Z-s.o
n'mrLZw
/** SEI0G_wk$
* @author treeroot fsjLD|?|:
* @since 2006-2-2 i[KXkjr
* @version 1.0 9wR D=a
*/ LKvX~68
public class ImprovedMergeSort implements SortUtil.Sort { @LI;q
m[=SCH-;
private static final int THRESHOLD = 10; W\>O$IX^e
6 EqN>.
/* H"/JR
* (non-Javadoc) B7uK:J:c*H
* ]z'L1vQl7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :Ob4WU
*/ ?-c|c_|$
public void sort(int[] data) { %q|*}l
int[] temp=new int[data.length]; 5b"=m9{g
mergeSort(data,temp,0,data.length-1); y0p=E^QM
} {8K
q,ie)`
private void mergeSort(int[] data, int[] temp, int l, int r) { >Y4^<!\v
int i, j, k; 3q4Zwv0z20
int mid = (l + r) / 2; l\ dPfJ
if (l == r) 9!=4}:+
return; 5b rM..
if ((mid - l) >= THRESHOLD) sd\}M{U
mergeSort(data, temp, l, mid); _:\rB
else CfW#Wk:8J
insertSort(data, l, mid - l + 1); kKF=%J?X
if ((r - mid) > THRESHOLD) K7C <}y
mergeSort(data, temp, mid + 1, r); \{<ml n
else !7\dr )
insertSort(data, mid + 1, r - mid); 8US35t:M
}BS EK<W
for (i = l; i <= mid; i++) { x3Cn:F
temp = data; 9K}DmS
} BD]J/o
for (j = 1; j <= r - mid; j++) { mIf)=RW
temp[r - j + 1] = data[j + mid]; H9jlp.F
} {G=>WAXo
int a = temp[l]; 8-+# !]
int b = temp[r]; ]uhG&: }
for (i = l, j = r, k = l; k <= r; k++) { $xW9))
if (a < b) { GjEV]hqR
data[k] = temp[i++]; S".|j$
a = temp; <P1nfH
} else { R5b,/>^'A
data[k] = temp[j--]; MMjewGxe
b = temp[j]; 0UpRSh)#
} +>1Yp">?
} x3'ANw6E
} 2Ax(q&`9
)xc1Lsrr9
/** axnVAh|}S
* @param data ]NaH *\q
* @param l SLP$|E;
* @param i x!I@cP#O
*/ ){/n7*#Th%
private void insertSort(int[] data, int start, int len) { t_I-6`8o]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nZj&Ma7R
} pDP* 3
} rk=w~IZJ3
} OkQ< Sc
} ?_{{iil
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堆排序： d^?e*USh
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package org.rut.util.algorithm.support; 85"Szc-#
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import org.rut.util.algorithm.SortUtil; g#{7qmM
$n8&5<
/** Dp*:oMATx0
* @author treeroot @QJPcF"
* @since 2006-2-2 T^8`ji
* @version 1.0 68~]_r.a
*/ 0@'-g^PS
public class HeapSort implements SortUtil.Sort{ 0p3) t
X..M!3W
/* (non-Javadoc) hT=E~|O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O:V.;q2]U
*/ &Kc45
public void sort(int[] data) { %QDAog
MaxHeap h=new MaxHeap(); }}Q h_(
h.init(data); $!'Vn)Z7
for(int i=0;i h.remove(); G|&$/]~
System.arraycopy(h.queue,1,data,0,data.length); %j0c|u
} agoMsxI9
#m7evb5eg*
private static class MaxHeap{ g>ke;SH%KY
'U@Ep
void init(int[] data){ l;z+E_sQ
this.queue=new int[data.length+1]; )@B!
for(int i=0;i queue[++size]=data; W:f)#'
fixUp(size); {IB4%,qT
} P5XUzLV L
} 1(aib^!B
MkZoHzg}c
private int size=0; ak}ke
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private int[] queue; A{{rNbCK
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public int get() { 9Z2aFW9
return queue[1]; jxw8jo06:
} *bcemH8f
v~^*L iP+
public void remove() { !9zs>T&9a\
SortUtil.swap(queue,1,size--); $f"Ce,f
fixDown(1); #s=\
} /ubGa6N
file://fixdown g{?{N
private void fixDown(int k) { on\ahk, y]
int j; k V'0rb
while ((j = k << 1) <= size) { _A$V~Hp9q
if (j < size %26amp;%26amp; queue[j] j++; gepYV}
if (queue[k]>queue[j]) file://不用交换 fxD|_
break; :=`N2D
SortUtil.swap(queue,j,k); (j)>npOd9
k = j; )Vy}oFT\
} `Z#]lS?
} !\Q/~p'jS
private void fixUp(int k) { 8{.:$T
while (k > 1) { V,3$>4x
int j = k >> 1; 0j-;4>p
if (queue[j]>queue[k]) D7N` %A8
break; ;Uj=rS`Q
SortUtil.swap(queue,j,k); \xtmd[7lb<
k = j; t7$2/C
} 9TE-'R@
} %$(*.o!+8
w5&,AL:
} wW;!L=j
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} 1j^FNg~
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SortUtil： Xn8r3Nb$A
}~o>H a;
package org.rut.util.algorithm; |(1z ?Spbe
!bD`2m[Q
import org.rut.util.algorithm.support.BubbleSort; \5^GUT
import org.rut.util.algorithm.support.HeapSort; ~%:23mIk
import org.rut.util.algorithm.support.ImprovedMergeSort; 9Lxa?Y1
import org.rut.util.algorithm.support.ImprovedQuickSort; k*xgF[T 8
import org.rut.util.algorithm.support.InsertSort; }q@Jh*
import org.rut.util.algorithm.support.MergeSort; V,Br|r$l(
import org.rut.util.algorithm.support.QuickSort; w6l8RNRe
import org.rut.util.algorithm.support.SelectionSort; lo!_;`v=U
import org.rut.util.algorithm.support.ShellSort; E%C02sI
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/** [L@ vC>G
* @author treeroot hGvuA9d~
* @since 2006-2-2 Y)4&PN~[
* @version 1.0 m-No 8)2yA
*/ 7w{>bYP
public class SortUtil { e|ngnkf(G
public final static int INSERT = 1; 6rOd80\
public final static int BUBBLE = 2; 7*r7Q'
public final static int SELECTION = 3; QR($KW(
public final static int SHELL = 4; GoNX\^A
public final static int QUICK = 5; q\g|K3V)
public final static int IMPROVED_QUICK = 6; pTlNJ!U>
public final static int MERGE = 7; ']ussFaQ
public final static int IMPROVED_MERGE = 8; RcH",*U
public final static int HEAP = 9; (1(dL_?
LCRZ<?O[|
public static void sort(int[] data) { ;'r} D!8w/
sort(data, IMPROVED_QUICK); Q}M% \v
} ,9W|$2=F
private static String[] name={ .W<yiB}^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wh@;$s"B
}; @m[r0i0J"
gzthM8A
private static Sort[] impl=new Sort[]{ aoh"<I%]>4
new InsertSort(), @exeHcW61
new BubbleSort(), |BGQ|7DyG
new SelectionSort(), gSP]& _9j
new ShellSort(), 4jlUyAD
new QuickSort(), I=)u:l c
new ImprovedQuickSort(), lV-b
new MergeSort(), R(sPU>`MX
new ImprovedMergeSort(), 0m^(|=N-
new HeapSort() <T[wZ[l
}; sF$$S/b
QQUYWC
public static String toString(int algorithm){ |<l sv
return name[algorithm-1]; E {$Jk]c
} ;x*_h
'Tni;
public static void sort(int[] data, int algorithm) { =1noT)gCR
impl[algorithm-1].sort(data); qcSlY&6+
} gwj+~vSfi
$ \j/s:Y
public static interface Sort { 3?F*|E_
public void sort(int[] data); E({W`b~_f
} iX]Vkx
t%$>
public static void swap(int[] data, int i, int j) { [=[>1<L>
int temp = data; a7+w)]r
data = data[j]; bhqBFiuhH
data[j] = temp; 0drt,k
} J3OxM--8"
} rz%8Vigb