[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; "Vp nr +6
} 9B0ON*`
int i1=l; .!o]oM U/
int i2=mid+1; N68mvBe
for(int cur=l;cur<=r;cur++){ ng%[yY
if(i1==mid+1) p>tkRA?lk
data[cur]=temp[i2++]; -#ZLu.
else if(i2>r) V9) /
data[cur]=temp[i1++]; `Z;Z^c
else if(temp[i1] data[cur]=temp[i1++]; '[#y|
else u9"=t
data[cur]=temp[i2++]; 7P<VtS
} h&'|^;FM
} l'"nU6B&
>Z!!`0{
} P73GH
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改进后的归并排序: 99=~vNn
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package org.rut.util.algorithm.support; Tx.N#,T|
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import org.rut.util.algorithm.SortUtil; a3yNd
<\#'o}
/** <st<oR'
* @author treeroot roQI;gq^
* @since 2006-2-2 kSz+UMC-7:
* @version 1.0 Tw-NIT)
*/ WGv47i
public class ImprovedMergeSort implements SortUtil.Sort { |]< 3cW+
gy.UTAs N
private static final int THRESHOLD = 10; LSC[S:
Gn2{C%
/* m!xvWqY+
* (non-Javadoc) SoU(fI[6
* =Kkqk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AX v q~XE
*/ uyYV_Q0~;
public void sort(int[] data) { j.&dHtp
int[] temp=new int[data.length]; t(3f} ?
mergeSort(data,temp,0,data.length-1); 2_wue49-l
} e4z~
(%B{=w}8
private void mergeSort(int[] data, int[] temp, int l, int r) { ~0p8joOH
int i, j, k; `]5qIKopL
int mid = (l + r) / 2; $)#orZtzr
if (l == r) Al^tM0T^
return; uY5|Nmiu
if ((mid - l) >= THRESHOLD) )V1xL_hx/
mergeSort(data, temp, l, mid); . Vb|le(7
else @[;'b$T$
insertSort(data, l, mid - l + 1); $]DuO1H./
if ((r - mid) > THRESHOLD) 6\7c:
mergeSort(data, temp, mid + 1, r); MZt#T+b
else UVw^t+n
insertSort(data, mid + 1, r - mid); 3;v)f":[
B=cA$620
for (i = l; i <= mid; i++) { Ic0Sb7c
temp = data; /GgID!8
} <O+GXJ2
for (j = 1; j <= r - mid; j++) { jF?0,g
temp[r - j + 1] = data[j + mid]; \*t\=4
} ?,$:~O*w
int a = temp[l]; d~<$J9%
int b = temp[r]; ;KQU% k$
for (i = l, j = r, k = l; k <= r; k++) { ":/c|!
if (a < b) { Wr[LC&
data[k] = temp[i++]; xQ"uC!Gu4
a = temp; q1VKoKb6\:
} else { T~xVHk1
data[k] = temp[j--]; (u 7Lh>6%
b = temp[j]; 6y^ zC?
} \Eh5g/,[
} 'UX^]
} eX$KH;M
toY_1
/** ^&<M""Z
* @param data s&E,$|80
* @param l D/E5&6
* @param i AOg'4
*/ &| (K#|^@
private void insertSort(int[] data, int start, int len) { "pDU v^ie
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2 ,nhs,FZ
} Ic&~iqQ
} i431mpMa
} T:Cq}4k<
} &oG>Rqkm
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堆排序： Vo"G@W)lZ
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package org.rut.util.algorithm.support; .JKH=?~\
Tt~4'{Bc
import org.rut.util.algorithm.SortUtil; yP]>eLTSd
7g*!6-W[
/** q?LOtN? o
* @author treeroot b]u=Iza
* @since 2006-2-2 r%;|gIky
* @version 1.0 Y7S1^'E 3
*/ [x)T2sA
public class HeapSort implements SortUtil.Sort{ x_7$g<n
gxO~44"
/* (non-Javadoc) "[ S[vkI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x;W!sO@$
*/ qXtC7uNj$
public void sort(int[] data) { cpk\;1&t
MaxHeap h=new MaxHeap(); =Z.0-C>W
h.init(data); q;9X8 _
for(int i=0;i h.remove(); p.:|Z-W$
System.arraycopy(h.queue,1,data,0,data.length); RZxh"lIo
} a?W5~?\9
B*G]Dr)e
private static class MaxHeap{ cWQJ9.:7
@|(cr: (=H
void init(int[] data){ ;jgf,fbM
this.queue=new int[data.length+1]; pBAAwHD
for(int i=0;i queue[++size]=data; `RY}g;
fixUp(size); le^Fik
} wbWC &X.
} ll5;09
\8#[AD*@s2
private int size=0; IS8 sJ6")
V~PGmn[V
private int[] queue; E#P#{_BR^
w#1BHx
public int get() { 46vC/
return queue[1]; ">7xSWR*4
} LHtO|Utn(
ddL3wQ
public void remove() { ;X+0,K3c
SortUtil.swap(queue,1,size--); ubB1a_7
fixDown(1); 7B0`.E^~
} ox SSEs
file://fixdown ^X_ ;ZLg.
private void fixDown(int k) { OX.5olb
int j; i3XtrP""
while ((j = k << 1) <= size) { 0-PT%R
if (j < size %26amp;%26amp; queue[j] j++; q2#Ebw%]
if (queue[k]>queue[j]) file://不用交换 %rB,Gl:)g
break; 1a9' *[
SortUtil.swap(queue,j,k); [`tOhL
k = j; 4(,.<#
} GQg 2!s(
} DvhFCA}z
private void fixUp(int k) { 1[OY-G
while (k > 1) { D;JZ0."
int j = k >> 1; kQU4s)J
if (queue[j]>queue[k]) ~ tR!hc}
break; HCr}|DxyK
SortUtil.swap(queue,j,k); +_ehzo97
k = j; ]+G\1SN~
} QH><! sa
} VP< zOk7
();Z,A
} ecm+33C
C2LG@iCIE
} iOm&(2/
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SortUtil： !_Y%+Rkp0
jA8Bmwt;w
package org.rut.util.algorithm; H`<u2fo|p
1<h@^s;
import org.rut.util.algorithm.support.BubbleSort; /7B3z}rd
import org.rut.util.algorithm.support.HeapSort; R[F`b
import org.rut.util.algorithm.support.ImprovedMergeSort; s]yZ<uA
import org.rut.util.algorithm.support.ImprovedQuickSort; R:P),
import org.rut.util.algorithm.support.InsertSort; 4qDa:D"5
import org.rut.util.algorithm.support.MergeSort; &pl)E$Y
import org.rut.util.algorithm.support.QuickSort; <.g)?nj1
import org.rut.util.algorithm.support.SelectionSort; <Y /3U
import org.rut.util.algorithm.support.ShellSort; DaH4Br.2
:M;|0w*b
/** MuO(%.H
* @author treeroot j^/<:e c.
* @since 2006-2-2 *} *HXE5
* @version 1.0 ,PpVZq~
*/ Y<^Or
public class SortUtil { Up-^km
public final static int INSERT = 1; ?/}IDwuh
public final static int BUBBLE = 2; / !h<+
public final static int SELECTION = 3; K4Ed]hX
public final static int SHELL = 4; )cgNf]oy
public final static int QUICK = 5; (|O(BxS
public final static int IMPROVED_QUICK = 6; + d>2'
public final static int MERGE = 7; &: LE]w
public final static int IMPROVED_MERGE = 8; QBmARQ
public final static int HEAP = 9; kK/>,Eg
0dx%b677d
public static void sort(int[] data) { @ #J2t#
sort(data, IMPROVED_QUICK); V#599-
} 0XE6Hw
private static String[] name={ %b pQ=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Hv"qRuQ?[
}; z+fy&NPl
,*Wh{)
private static Sort[] impl=new Sort[]{ EP4?+"Z
new InsertSort(), WO69Wo\C
new BubbleSort(), M$v\7vBgO!
new SelectionSort(), Mj0jpP<uf
new ShellSort(), ?/3{gOgI$`
new QuickSort(), {niV63$m
new ImprovedQuickSort(), MR,>]| ^
new MergeSort(), (eT9N_W
new ImprovedMergeSort(), 5!i\S[:
new HeapSort() =f=>buD
}; {JQV~rfh`
3kr.'O
public static String toString(int algorithm){ UM1h[#?&V)
return name[algorithm-1]; d|tNn@jN
} z\k6."e_&
Hm 0;[i
public static void sort(int[] data, int algorithm) { WYvcN8F
impl[algorithm-1].sort(data); f#38QP-T
} <@>icDFEHn
gBgaVG
public static interface Sort { G #$r)S
public void sort(int[] data); tR=1.M96Y
} $*fEgU% c
TD;u"
public static void swap(int[] data, int i, int j) { OS~Z@'Eg
int temp = data; BMzS3;1_
data = data[j]; d^Cv9%X
data[j] = temp; &x.5TDB>%
} o -x=/b
} MA=gCG/JD