[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; .}z&$:U9[
} |EF*]qI
int i1=l; .Mm8\].
int i2=mid+1; M6g!bK2l
for(int cur=l;cur<=r;cur++){ 2^Y1S?g.
if(i1==mid+1) 'rz*mR8
data[cur]=temp[i2++]; O'j;"l~H|
else if(i2>r) @AWKEo<7.I
data[cur]=temp[i1++]; u2BVQ<SA
else if(temp[i1] data[cur]=temp[i1++]; B8C"i%8V)
else ZpWG
data[cur]=temp[i2++]; +]I7)
} j@ =n|cq
} '2#O{
`Y$LXF~,Om
} o/9 V1"
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改进后的归并排序: 9C`Fd S
]@Zj-n8
package org.rut.util.algorithm.support; B"8^5#t4s
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import org.rut.util.algorithm.SortUtil; FK+jfr [
F"9qBl~
/** :%;K`w
* @author treeroot 69CH W&
* @since 2006-2-2 V!~uGf
* @version 1.0 A;{8\e
*/ #&Biu}4D
public class ImprovedMergeSort implements SortUtil.Sort { BQ".$(c q
s8 3_Bd
private static final int THRESHOLD = 10; m]&d TZV
>JnEhVRQJ9
/* ("IRv>} 0
* (non-Javadoc) C2!POf;GdN
* L,\ Yj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f}#pKsX.
*/ pn'*w1i
public void sort(int[] data) { Y[*z6gP(
int[] temp=new int[data.length]; 8Zwq:lV Q
mergeSort(data,temp,0,data.length-1); dG6Mo76
} %tmK6cY4Y
ssoe$Gr7>
private void mergeSort(int[] data, int[] temp, int l, int r) { szWh#O5=
int i, j, k; #d__
int mid = (l + r) / 2; +tlTHK
if (l == r) m"jqHGFV
return; >Rx^@yQ!+z
if ((mid - l) >= THRESHOLD) hOw7"'# !
mergeSort(data, temp, l, mid); uVIs5IZzIi
else 1p`XK";g
insertSort(data, l, mid - l + 1); py@5]n%
if ((r - mid) > THRESHOLD) ~ ]o .Mv a
mergeSort(data, temp, mid + 1, r); |'1[\<MM3
else whxE[Xnv
insertSort(data, mid + 1, r - mid); :?yv0Iu
t0Ec`+)
for (i = l; i <= mid; i++) { 1*(^<x+n
temp = data; b9`MUkGGd
} /Nb&e
for (j = 1; j <= r - mid; j++) { gdHPi;
temp[r - j + 1] = data[j + mid]; HR)joD*q;[
} ;h] zN
int a = temp[l]; `O0v2?/f0
int b = temp[r]; =V%s^
for (i = l, j = r, k = l; k <= r; k++) { .:$%3#N$(Y
if (a < b) { &Zq43~
data[k] = temp[i++]; Q9?/)&3Bu
a = temp; a?&oOQd-iP
} else { jC<<S
data[k] = temp[j--]; glPOW
b = temp[j]; ym<G.3%1
} Z2hRTJJ[A
} G#n27y nh
} Bd)Qz(>rw
?%B%[u
/** ZZ?=^g
* @param data e9"<.:&
* @param l d-39G*;1
* @param i /]iv9e{uh(
*/ Rq9v+Xq2
private void insertSort(int[] data, int start, int len) { UiF?Nx~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1JJQ(b
} RLecKw&1{3
} VA.:'yQtJ
} El]Rrku
} j$Gb>Ex>
EKq9m=Ua@o
堆排序： VO[s:e9L
3*XX@>|o
package org.rut.util.algorithm.support; @dD70T
(fb&5=Wzw
import org.rut.util.algorithm.SortUtil; C6:<.`iD87
!x|OgvJ
/** h7kGs^pP
* @author treeroot 9`QWqu[
* @since 2006-2-2 V5%B,.d:
* @version 1.0 Y0aO/6
*/ bU(t5 [
public class HeapSort implements SortUtil.Sort{ vvFXdHP
5;C+K~Y
/* (non-Javadoc) jsfyNl?6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w/E4wp
*/ J{\S+O2,*
public void sort(int[] data) { DRj\i6-v
MaxHeap h=new MaxHeap(); (/tbe@<
h.init(data); ~z%K9YcyU
for(int i=0;i h.remove(); IWsB$T
System.arraycopy(h.queue,1,data,0,data.length); %Mz(G-I.\
} `A$yF38!
dX,2cK[aG
private static class MaxHeap{ lMFj"x\
buG0#:
void init(int[] data){ "JKrbgN@;L
this.queue=new int[data.length+1]; T&X*[kP
for(int i=0;i queue[++size]=data; M($dh9A_
fixUp(size); !+=jD3HTJ
} ?4(uwXp
} a[[u>oHyd
<eI7xifD
private int size=0; f-tjMa /_
%'%r.
private int[] queue; h 5t,5e}
<Y9((QSM4
public int get() { )pW(Cp
return queue[1]; 03iO4yOu
} 8'@pX<
W2qW`Ujo{
public void remove() { -U'6fx) +
SortUtil.swap(queue,1,size--); L&][730
fixDown(1); z?Hvh
} 4:y;<8+j\
file://fixdown q --NLm@;
private void fixDown(int k) { w<.{(1:v
int j; `oXUVr
while ((j = k << 1) <= size) { G@BF<e{
if (j < size %26amp;%26amp; queue[j] j++; P`cEu6:
if (queue[k]>queue[j]) file://不用交换 [XhuJdr"u
break; :|EM1-lwf
SortUtil.swap(queue,j,k); wJ/k\
k = j; e(O"V3wq*6
} ]ta]OK{s"
} |j#x}8[(
private void fixUp(int k) { w%GEOIj}
while (k > 1) { ;vc$;54K
int j = k >> 1; 4%aODr8
if (queue[j]>queue[k]) ? D2:'gg
break; ]SFB_5Gb
SortUtil.swap(queue,j,k); 593D/^}D
k = j; %o.{h
} GL(R9Y
} c{ +Y$
xoA\^AA
} 4Fgy<^94`
xbxU`2/
} gmJiKuAL5
Xv|~1v%s7
SortUtil： X0* y8"
9@nX 6\,
package org.rut.util.algorithm; _6;T /_R=
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import org.rut.util.algorithm.support.BubbleSort; *+vS f7
import org.rut.util.algorithm.support.HeapSort; w(]Q`
import org.rut.util.algorithm.support.ImprovedMergeSort; 1X.5cl?V
import org.rut.util.algorithm.support.ImprovedQuickSort; &D\~-fOGb
import org.rut.util.algorithm.support.InsertSort; `[0.G0i
import org.rut.util.algorithm.support.MergeSort; =.#*MYB.l
import org.rut.util.algorithm.support.QuickSort; 9(dbou
import org.rut.util.algorithm.support.SelectionSort; .-k\Q}D
import org.rut.util.algorithm.support.ShellSort; o;7!$v>uK
LZqx6~]O
/** GE\@mu *pO
* @author treeroot 2v0lWO~c7z
* @since 2006-2-2 \Se>u4~L
* @version 1.0 BXiuVx
*/ JVD#wwic
public class SortUtil { B- N
public final static int INSERT = 1; AA:Ch?
public final static int BUBBLE = 2; Z f4Xt Yn
public final static int SELECTION = 3; "i<i.6|
public final static int SHELL = 4; Jk!}z+X'A
public final static int QUICK = 5; sF:3|Yy0
public final static int IMPROVED_QUICK = 6; ZXsm9
public final static int MERGE = 7; x\)0+c~\}x
public final static int IMPROVED_MERGE = 8; Ji\8(7 {8
public final static int HEAP = 9; \h~;n)FI
Ratg!l|'-
public static void sort(int[] data) { 8j. 9Sk/
sort(data, IMPROVED_QUICK); BI?M/pIm
} ~vy_~|6s
private static String[] name={ 'QFf 7A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,9^wKS!7$
}; P PZxH}J.
L&+XFntR
private static Sort[] impl=new Sort[]{ d}GO(
new InsertSort(), '=EaZ>=
new BubbleSort(), ExqI=k`Zs
new SelectionSort(), hs}nI/#
new ShellSort(), SWvy<f4<
new QuickSort(), Cp7EJr~
new ImprovedQuickSort(), eNY$N_P
new MergeSort(), 0.4c|-n
new ImprovedMergeSort(), 2~AGOx
new HeapSort() 6Daz1Pxd+
}; -z)I;R
!n~p?joJ*
public static String toString(int algorithm){ 'KMyaEh.u
return name[algorithm-1]; -)(HG)3
} \/I@&$"F
/Li?;H
public static void sort(int[] data, int algorithm) { u~=>$oT't
impl[algorithm-1].sort(data); ,~`R{,N`
} qd6XKl\5
'9>z4G*Td
public static interface Sort { xV @X%E
public void sort(int[] data); {wiw]@c8
} !U>711$
@5K/z<p%
public static void swap(int[] data, int i, int j) { /PN[g~3
int temp = data; UbE*x2N
data = data[j]; nyD(G=Q5
data[j] = temp; BY.'0,H=k
} #lRkp.e
} )=V0