[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; 5>^ W}0s
} jmwQc&
int i1=l; .>\>F{#~
int i2=mid+1; 0V>N#P]
for(int cur=l;cur<=r;cur++){ ztt%l #
if(i1==mid+1) /m|&nl8"qe
data[cur]=temp[i2++]; [sh"?
else if(i2>r) I'wk/
data[cur]=temp[i1++]; d}A2I
else if(temp[i1] data[cur]=temp[i1++]; vo^9qSX f
else NU6Kh7
data[cur]=temp[i2++]; 4N^Qd3[d
} \$0 x8B
} I;fw]/M%!
R,b O{2O
} TW;;OS[
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改进后的归并排序: A0 w `o
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package org.rut.util.algorithm.support; M#gGD-
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import org.rut.util.algorithm.SortUtil; gpTF^.(
%2FCpre;
/** ?tM].\
* @author treeroot DcvmeGl
* @since 2006-2-2 M`,Z#)Af
* @version 1.0 ,,-[P*@
*/ #p:jKAc3
public class ImprovedMergeSort implements SortUtil.Sort { 1Z{p[\k
%emPSBf@
private static final int THRESHOLD = 10; ]> "/<"
R5~vmT5W
/* ;ZW}47:BS6
* (non-Javadoc) jgfP|oD
* "rlSK >`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H<}Fk9
*/ X9BBnZ
public void sort(int[] data) { JV*,!5
int[] temp=new int[data.length]; lDM~Z3(/b
mergeSort(data,temp,0,data.length-1); hF%~iqd
} B*~Bm.
7Mbt*[n
private void mergeSort(int[] data, int[] temp, int l, int r) { >rX R;4%
int i, j, k; SbNUX
int mid = (l + r) / 2; b.u8w2(
if (l == r) CjukD%>sde
return; .mU.eLM
if ((mid - l) >= THRESHOLD) NGeeD?2~
mergeSort(data, temp, l, mid); rH_:7#.E
else uEO2,1+
insertSort(data, l, mid - l + 1); 8t 35j
if ((r - mid) > THRESHOLD) GP kCgb(
mergeSort(data, temp, mid + 1, r); h[)aRo
else 4 ~|TKd{
insertSort(data, mid + 1, r - mid); .6A:t?.
L5P}%1 _
for (i = l; i <= mid; i++) { w0`L)f5v
temp = data; 3e<^-e)+xL
} QZq9$;>dW
for (j = 1; j <= r - mid; j++) { bB:X<
temp[r - j + 1] = data[j + mid]; = 8e8!8
} T7_ SO,X
int a = temp[l]; vrldRn'*9
int b = temp[r]; uTloj.
for (i = l, j = r, k = l; k <= r; k++) { aI#n+PW
if (a < b) { 'ah0IYe
data[k] = temp[i++]; '/*rCB
a = temp; = y,avR
} else { J^a"1|
data[k] = temp[j--]; sWCm[HpG
b = temp[j]; [<I `slK
} zi&d
} g#2X'%&+
} 3jVm[c5%]
)'CEWc%
/** !>);}J!e]
* @param data 5K-)X9z?
* @param l )CTM
* @param i 1KR|i"
*/ &>b1ES.>
private void insertSort(int[] data, int start, int len) { ;l4\^E1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9{#|sABGD
} 'i-O
} D}U<7=\3H
} YGmdiY:;1
} Qg.:w
0e](N`
堆排序： ;I@L
#E@i@'T
package org.rut.util.algorithm.support; */e5lRO\
R51!j>[fqM
import org.rut.util.algorithm.SortUtil; N9|.D.#MF
Oo .Qz
/** ~ b_gwJ'
* @author treeroot [1MEA;
* @since 2006-2-2 YU,:3{9,
* @version 1.0 *c c+Fd
*/ YYh_lAS>
public class HeapSort implements SortUtil.Sort{ @O @yJ{(I
cY]Y8T)
/* (non-Javadoc) <~*Ol+/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j7+t@DqQ
*/ vp9<.*h
public void sort(int[] data) { _7.y4zQJ
MaxHeap h=new MaxHeap(); 5hK\YTU
h.init(data); LkB!:+v |B
for(int i=0;i h.remove(); GK%ovK
System.arraycopy(h.queue,1,data,0,data.length); oA%[x
} j'x{j %U
>7q,[:(gs
private static class MaxHeap{ gD=5M\
S:\hcW6
void init(int[] data){ Y\|J1I,Z4
this.queue=new int[data.length+1]; l!` 0I] }
for(int i=0;i queue[++size]=data; I,3!uogn
fixUp(size); @&B!P3{f
} ~l6Y<-!
} 9v2 ;
-;-"i J0
private int size=0; B'/ >Ax&
0.0!5D[
private int[] queue; f~9Y1|6
$3B?
public int get() { ;qK6."b`;
return queue[1]; EQ$9IaY.
} I!O S&8:u
~=ys~em e
public void remove() { !17Z\Ltqyj
SortUtil.swap(queue,1,size--); ybO,~TQ
fixDown(1); .Y.# d7TA
} mK4|=Q
file://fixdown ;BVhkWA
private void fixDown(int k) { H12@12v
int j; 7#3)&"j
while ((j = k << 1) <= size) { x&vD,|V!
if (j < size %26amp;%26amp; queue[j] j++; LL [>Uu?Y
if (queue[k]>queue[j]) file://不用交换 e6'O,\
break; TMsoQ82
SortUtil.swap(queue,j,k); e5]AB
k = j; +cH(nZ*f
} 1D6O=j\
} \TlUC<urP
private void fixUp(int k) { &Z!2xfQy>
while (k > 1) { s+- aHn
int j = k >> 1; ?!oa15
if (queue[j]>queue[k]) V/e_:xECC
break; ]L^M7SKE6
SortUtil.swap(queue,j,k); w%n]~w=8
k = j; ,2bAKa
} H/Q)zDP
} i@L2W>{P
=rF8[Q0K
} [+z:^a1?V
E ET 2|*}
} V p{5Kxq
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SortUtil： s3 $Q_8H
R2W_/fsG
package org.rut.util.algorithm; -+_&#twU
^ni_%`Ag
import org.rut.util.algorithm.support.BubbleSort; 4N j?UDa
import org.rut.util.algorithm.support.HeapSort; )7J>:9h
import org.rut.util.algorithm.support.ImprovedMergeSort; MNC!3d(D\R
import org.rut.util.algorithm.support.ImprovedQuickSort; >,Z{wxzJ
import org.rut.util.algorithm.support.InsertSort; Ao$z)<d'
import org.rut.util.algorithm.support.MergeSort; DA~ELje^j
import org.rut.util.algorithm.support.QuickSort; {E|gV9g
import org.rut.util.algorithm.support.SelectionSort; +~O{ UGB=
import org.rut.util.algorithm.support.ShellSort; LP /4e`
C|LQYz-{
/** s#ZH.z@J
* @author treeroot IOl"Xgn5
* @since 2006-2-2 7gcG|kKT
* @version 1.0 ze N!*VG
*/ O]eJQ4XN<
public class SortUtil { Mk?I}
public final static int INSERT = 1; uD5yw#`
public final static int BUBBLE = 2; wP?q5r5
public final static int SELECTION = 3; |0p'p$%
public final static int SHELL = 4; cyg>hX{U
public final static int QUICK = 5; k5(yf~!c
public final static int IMPROVED_QUICK = 6; n^#LB*q
public final static int MERGE = 7; &S]v+wF
public final static int IMPROVED_MERGE = 8; ~7'.{VrU
public final static int HEAP = 9; &Sa~Wtm|*
rK|&u v*b
public static void sort(int[] data) { Ya 4$7|(
sort(data, IMPROVED_QUICK); P^W47 SO
} 3=7h+ZgB
private static String[] name={ krc!BK`V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^#se4qQ
}; ;(6lN<iU
|3ETF|)?
private static Sort[] impl=new Sort[]{ $t'I*k^N
new InsertSort(), |Eu~=J7@
new BubbleSort(), [zEP|
new SelectionSort(), . *xq =
new ShellSort(), ped Yf{T
new QuickSort(), yVzg<%CR^
new ImprovedQuickSort(), :G/]rDtd
new MergeSort(), 7g+]
new ImprovedMergeSort(), #SNI dc>9\
new HeapSort() Fg_s'G,`
}; Cq;d2u0)o$
J?fh3RW9
public static String toString(int algorithm){ l}c2l'
return name[algorithm-1]; mXj Ljgc}
} 5N<v'6&=
Z"Ni Y
public static void sort(int[] data, int algorithm) { i]%"s_l
impl[algorithm-1].sort(data); olxP`iK
} Nn1^#kc
RGI6W{\
public static interface Sort { F6VIH(
public void sort(int[] data); (`? snMc
} ^VPl>jTg
J5( D7rp#
public static void swap(int[] data, int i, int j) { @rE)xco
int temp = data; iDc|9"|Tf3
data = data[j]; WPKTX,k
data[j] = temp; @6'E8NFl
} #2ASzCe
} '$-,;vnP0