[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; H0dHW;U<1
} U<|hIv-&
int i1=l; KzgW+6*G
int i2=mid+1; dx.,
for(int cur=l;cur<=r;cur++){ M'(4{4rC
if(i1==mid+1) (B/od#nU
data[cur]=temp[i2++]; W~W`fm
else if(i2>r) k_,wa]ws$
data[cur]=temp[i1++]; <]w(1{q(
else if(temp[i1] data[cur]=temp[i1++]; Sh@en\m=#S
else k'6Poz+<
data[cur]=temp[i2++]; '!V5 #J
} (7zdbJX
} K-<kp!v
^Fop/\E
} ?^X e^1(
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改进后的归并排序: *m>XtBw.
jIvSjlmI
package org.rut.util.algorithm.support; O,D/&0
M"W~%
import org.rut.util.algorithm.SortUtil; $E >)
Uo<iZ3J
/** \>7hT;Av=G
* @author treeroot hRc.^"q9
* @since 2006-2-2 Y-ZTv(<
* @version 1.0 Bu{1^g:
*/ U%PII>s'#
public class ImprovedMergeSort implements SortUtil.Sort { ~#]$YoQ&O
%C1*`"Jb&
private static final int THRESHOLD = 10; ZH s' #
<T^:`p/]4
/* I\y=uC
* (non-Javadoc) Zqp<8M2
* q@+#CUa&n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Fcp8RBq
*/ ,suC`)R
public void sort(int[] data) { #P,C9OQD
int[] temp=new int[data.length]; +`(,1L1
mergeSort(data,temp,0,data.length-1); $qp,7RW
} _v\L'`bif
'P`L?/_3
private void mergeSort(int[] data, int[] temp, int l, int r) { wI{ED
int i, j, k; KD(}-zUs
int mid = (l + r) / 2; <\6<-x(H5
if (l == r) .29y3}[PO
return; =Z~nzyaN
if ((mid - l) >= THRESHOLD) =7l'3z8
mergeSort(data, temp, l, mid); {E3329t|'
else lYq/ n&@_1
insertSort(data, l, mid - l + 1); lk[BS*
if ((r - mid) > THRESHOLD) iC`mj
mergeSort(data, temp, mid + 1, r); J;R1OJs S
else '*d);{D8
insertSort(data, mid + 1, r - mid); RIg `F#,3
:}n\ r/i
for (i = l; i <= mid; i++) { 97L|IZ s)
temp = data; O9/7?"l"
} ]ysEj3
for (j = 1; j <= r - mid; j++) { jWE?$r"
temp[r - j + 1] = data[j + mid]; sfUKH;xC
} >P_/a,O8
int a = temp[l]; I `I+7~t
int b = temp[r]; $TK<~3`
for (i = l, j = r, k = l; k <= r; k++) { ? 3'O
if (a < b) { W&'[Xj
data[k] = temp[i++]; Up*.z\|'y
a = temp; MmL)CT
} else { m.':5
data[k] = temp[j--]; uB*Y}"Fn
b = temp[j]; ),%(A~\
} S+mM S
} P)k!#*
} loR,f&80=O
-V\$oVS0S
/** JsY|Fv
* @param data A])+Pe
* @param l (;(P3h
* @param i g=q1@)
*/ ]$=\zL
private void insertSort(int[] data, int start, int len) { gq`S`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); kaUEv\T
} &40# _>W7
} y$h.k"x`
} #|ILeby
} R4x!b`:i
K4`)srd
堆排序： nS$_VJ]~
OdWZYWj
package org.rut.util.algorithm.support; +C8yzMN\
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import org.rut.util.algorithm.SortUtil; $T-Pl57
9cMQ51k)E
/** hALg5.E{T
* @author treeroot /ZpwJc`e
* @since 2006-2-2 ) Z^b)KAk
* @version 1.0 FcaO-
*/ B*c@w~E
public class HeapSort implements SortUtil.Sort{ 4eh~/o&h
W5c?f,
/* (non-Javadoc) :IB@@5r1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O% }EpIP_
*/ K|Kc.
public void sort(int[] data) { M0$wTmXM
MaxHeap h=new MaxHeap(); #eZm)KFQg
h.init(data); [i 7^a/e
for(int i=0;i h.remove(); {%! >0@7
System.arraycopy(h.queue,1,data,0,data.length); $?FA7=_
} &'{?Y;A
}r _d{nhi
private static class MaxHeap{ SAUfA5|e
W}0cM9 g
void init(int[] data){ ~REP@!\r^
this.queue=new int[data.length+1]; =o? Q0
for(int i=0;i queue[++size]=data; 7JL*y\'
fixUp(size); ~bsL W:.'
} CA8N
} S`?L\R.:
6U!zc]>
private int size=0; : l&g5
A."]6R<
private int[] queue; YZllfw$9
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public int get() { `=FDNOwp
return queue[1]; >mXq= 9L4
} A KjCm*K(q
6:$+"@ps
public void remove() { 23|R $s>}i
SortUtil.swap(queue,1,size--); |w)S &+
fixDown(1); 2n3g!M6~
} [e.@Yx_}
file://fixdown rfwX:R6,g
private void fixDown(int k) { k'b'Ay(<
int j; TLWU7aj&!
while ((j = k << 1) <= size) { hxX-iQya
if (j < size %26amp;%26amp; queue[j] j++; 1O@y >cV
if (queue[k]>queue[j]) file://不用交换 ;:l>Kac
break; }g]O_fN7~
SortUtil.swap(queue,j,k); {CH *?|t
k = j; l+n0=^ Z
} /tqQAvj
} y%NZ(Y,v
private void fixUp(int k) { =T3O;i
while (k > 1) { p+7ZGB
int j = k >> 1; PYPDK*Ie
if (queue[j]>queue[k]) UL<*z!y
break; oy< q;'
SortUtil.swap(queue,j,k); }bM=)eUfX
k = j; DI,8y"!5
} !c#~g0H+
} A!n)Fpk
DwBKqhu
} g]a5%8*{
iF!r}fUU6
} x=jS=3$8
^`< %Pk
SortUtil： XaH%i~}3
%*Aq%,.={
package org.rut.util.algorithm; +GDT@,/
l2[{T^
import org.rut.util.algorithm.support.BubbleSort; (Ymj
import org.rut.util.algorithm.support.HeapSort; GL-r;
import org.rut.util.algorithm.support.ImprovedMergeSort; P{tH4V23T
import org.rut.util.algorithm.support.ImprovedQuickSort; 1,pg7L8H
import org.rut.util.algorithm.support.InsertSort; ;VlA~tv
import org.rut.util.algorithm.support.MergeSort; tuWJj^
import org.rut.util.algorithm.support.QuickSort; 9X%H$>s
import org.rut.util.algorithm.support.SelectionSort; SRfnT?u6
import org.rut.util.algorithm.support.ShellSort; Vub($
qQ=\R1l
/** +\@}IKWl-?
* @author treeroot V3] Z~@
* @since 2006-2-2 U)B^R
* @version 1.0 a-(OAzQ_
*/ HAOl&\)7"_
public class SortUtil { v==]v2-
public final static int INSERT = 1; S{.G=O
public final static int BUBBLE = 2; h|OsT
public final static int SELECTION = 3; v5Qp[O_
public final static int SHELL = 4; #G`UR
public final static int QUICK = 5; W]l&mr
public final static int IMPROVED_QUICK = 6; ),53(=/hl
public final static int MERGE = 7; ,MRAEa2
public final static int IMPROVED_MERGE = 8; 4,.B#: 8
public final static int HEAP = 9; i{.%4tA4
Qe,aIh
public static void sort(int[] data) { 6'YsSde".
sort(data, IMPROVED_QUICK); NKJ+DD:'
} fAHf}j
private static String[] name={ {T2=bK~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fRT4,;
}; N-cLp}D}WB
|y}iOI
private static Sort[] impl=new Sort[]{ LRa^x44
new InsertSort(), "pLWJvj6-
new BubbleSort(), )*tV
new SelectionSort(), WD${f#]N
new ShellSort(), hNWZ1r~_
new QuickSort(), CpG]g>]L&[
new ImprovedQuickSort(), =MCQNyf+
new MergeSort(), pjVF^gv,*
new ImprovedMergeSort(), ICxj$b
new HeapSort() XI"8d.VR
}; K[/sVaPZ
[8OQ5}do/
public static String toString(int algorithm){ 3|qT.QR`Z
return name[algorithm-1]; hCvK2Xu
} R3,O;9i
dnXre*rhz
public static void sort(int[] data, int algorithm) { wx2EMr
impl[algorithm-1].sort(data); ~[H+,+XLY+
} $-Wn|w+h<a
(|kcSnF0
public static interface Sort { ~n<U8cm O
public void sort(int[] data); YB&b_On,f
} `<3xi9
Sh(Ws2b7
public static void swap(int[] data, int i, int j) { 'L1=:g.\i
int temp = data; KbP( ;
data = data[j]; @_ Q
data[j] = temp; +^0Q~>=VD
} y53f73Cg
} :e|[gEA