[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; xf?*fm?m
} u!];RHOp|
int i1=l; B_anO{3$4
int i2=mid+1; hdp;/Qz&
for(int cur=l;cur<=r;cur++){ S v$%-x^t
if(i1==mid+1) ^i2W=A'P
data[cur]=temp[i2++]; r:2G11[
else if(i2>r) %%}U -*b
data[cur]=temp[i1++]; /Zap'S/
else if(temp[i1] data[cur]=temp[i1++]; ds,NNN<HW
else 7/w)^&8
data[cur]=temp[i2++]; vX;WxA<
} kqYWa`eE
} oQ1>*[e<u
#HpF\{{v
} 9o"k 7$
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改进后的归并排序: U6e 0{n
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package org.rut.util.algorithm.support; 4R0'$Ld4
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import org.rut.util.algorithm.SortUtil; h5e(Avk
\3LP@;Phn
/** *JDQaWzBd
* @author treeroot $'}rBPA/
* @since 2006-2-2 z'Atw"kA
* @version 1.0 V6P2W0m
*/ '/%]B@!
public class ImprovedMergeSort implements SortUtil.Sort { ?zGx]?1P1<
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private static final int THRESHOLD = 10; M?l/_!QB
YEH /22
/* #m=TK7*v
* (non-Javadoc) n@xC?D:t*
* S-l<+O1fy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <ZO"0oz%
*/ m/@ ;N,K
public void sort(int[] data) { U{/d dCf7
int[] temp=new int[data.length]; OGW,[k=2{
mergeSort(data,temp,0,data.length-1); [qbZp1s|(
} |LhVANz
-5vg"|ia,
private void mergeSort(int[] data, int[] temp, int l, int r) { 5My4a9
int i, j, k; )#S;H$@$
int mid = (l + r) / 2; O*0%AjT6
if (l == r) mq 0d ea
return; +~xY}
if ((mid - l) >= THRESHOLD) \#Md3!MG
mergeSort(data, temp, l, mid); yp}J+/PX}
else lTb4quf8I
insertSort(data, l, mid - l + 1); hOFC8g
if ((r - mid) > THRESHOLD) [g)HoR=&
mergeSort(data, temp, mid + 1, r); 9o%k [n
else y5/frJ
insertSort(data, mid + 1, r - mid); pmda9V4
sgYPR
for (i = l; i <= mid; i++) { WB)pE'5
temp = data; >b\{y}[
} 3(&k4
for (j = 1; j <= r - mid; j++) { 7v'aw"~
temp[r - j + 1] = data[j + mid]; mok94XuK)
} +_E^E
int a = temp[l]; r2ZSkP.
int b = temp[r]; (\8IgQ{
for (i = l, j = r, k = l; k <= r; k++) { g[G+s4Nv
if (a < b) { +O$`8a)m
data[k] = temp[i++]; gXJtk;
a = temp; p1F{ v^
} else { jk(tw-B
data[k] = temp[j--]; u~rPqBT{d3
b = temp[j]; aH/8&.JLi
} {L'uuG\9U
} 79&=MTM
} !NqLBrcv0
Jb/VITqN4
/** xAwP
* @param data P5Bva
* @param l W3+;1S$k
* @param i H0(.p'eN
*/ \jmT#Gt`9
private void insertSort(int[] data, int start, int len) { J]W? Vvv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); - +<ai
} JUXo3D~
} J,G/L!Bp
} Xr."C(`w
} q}PUwN6
4 :phq
堆排序： C5,\DdCX,
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package org.rut.util.algorithm.support; A&N$=9.N1
cb=ixn
import org.rut.util.algorithm.SortUtil; 0VnRtLnqI
ffW-R)U|3
/** xLdkeuL[%
* @author treeroot lb{X6_.
* @since 2006-2-2 f4O}WU}l{s
* @version 1.0 qWU59:d^{
*/ [jz@d\k$_
public class HeapSort implements SortUtil.Sort{ [_`<<!u>-
HCKocL/]h
/* (non-Javadoc) !k<k]^Z\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yxtfyf|9 '
*/ v4qpE!W27~
public void sort(int[] data) { 5d;(D i5z
MaxHeap h=new MaxHeap(); FKtG
h.init(data); }S"qU]>8a
for(int i=0;i h.remove(); sa}.o ZpQ
System.arraycopy(h.queue,1,data,0,data.length); ~#jnkD
} mGpBj9jr1
:IO"' b
private static class MaxHeap{ },=ORIB B:
'%&-`/x
void init(int[] data){ ~Qd|.T
this.queue=new int[data.length+1]; ta@fNS4
for(int i=0;i queue[++size]=data; Y .E.(\
fixUp(size); dy~M5,zn
} HHerL%/
} %J+ w9Z
BXNC(^
private int size=0; TyvUdU
3!h3flE
private int[] queue; .NJ Ne
.E9$j<SP-
public int get() { cm8co
return queue[1]; b\^1P;!'W
} iA|n\a~ny,
}R~C<3u\2
public void remove() { ?Ld:HE
SortUtil.swap(queue,1,size--); - i{1h"
fixDown(1); e< G[!m
} 4QE")Ge
file://fixdown f[*g8p
private void fixDown(int k) { N3V4Mpf
int j; 5Z(q|nn7P
while ((j = k << 1) <= size) { UhXVeGO
if (j < size %26amp;%26amp; queue[j] j++; oore:`m;
if (queue[k]>queue[j]) file://不用交换 J[UTn'M8]
break; 4^*Z[6nt|
SortUtil.swap(queue,j,k); XM3~]
k = j; ('`mPD,
} VrKLEN\
} S/yBr`
private void fixUp(int k) { DB'3h7T
while (k > 1) { r!^VCA
int j = k >> 1; _QtW)\)5\
if (queue[j]>queue[k]) AHT(Z~C
break; >J,IxRGi
SortUtil.swap(queue,j,k); _$mS=G(
k = j; `uc`vkVZ
} BOl*. t
} PkOtg[Z
IFXnGDG$
} ; X/'ujg
h2aO-y>K
} G&yF9s)Lvs
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SortUtil： G[ q<P
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package org.rut.util.algorithm; m.U&O=]5
@ 3b-
import org.rut.util.algorithm.support.BubbleSort; /b{Ufo3v
import org.rut.util.algorithm.support.HeapSort; `)H| &!wT
import org.rut.util.algorithm.support.ImprovedMergeSort; G)=+Nt\*
import org.rut.util.algorithm.support.ImprovedQuickSort; PkK#HD
import org.rut.util.algorithm.support.InsertSort; &qV_|f;
import org.rut.util.algorithm.support.MergeSort; 3H5<w4yk
import org.rut.util.algorithm.support.QuickSort; b~+\\,q}
import org.rut.util.algorithm.support.SelectionSort; %%Wn:c>
import org.rut.util.algorithm.support.ShellSort; "; ?^gA
s3)T}52
/** a]x\e{
* @author treeroot A:?w1"7gT
* @since 2006-2-2 :5zO!~\
* @version 1.0 }& 01=nY
*/ ,oj)`?Vh
public class SortUtil { "oCXG`.k&
public final static int INSERT = 1; -vS7%Fbr
public final static int BUBBLE = 2; !?m8UE
public final static int SELECTION = 3; W0Q;1${
public final static int SHELL = 4; ~ [=2d a
public final static int QUICK = 5; GV SVNT}I
public final static int IMPROVED_QUICK = 6; 9riKSp:5
public final static int MERGE = 7; i'0ol^~y6
public final static int IMPROVED_MERGE = 8; Va\?"dH>M
public final static int HEAP = 9; ACH!Gw~
Y.o-e)zX
public static void sort(int[] data) { oz?6$oE(bt
sort(data, IMPROVED_QUICK); 4Bq4d.0
} Jz)c|8U
private static String[] name={ UyOoyyd.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" y &%2
}; TGozoPV
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private static Sort[] impl=new Sort[]{ J_ `\}55n
new InsertSort(), 2<+9lk
new BubbleSort(), AlT04H
new SelectionSort(), w77"?kJ9X
new ShellSort(), ,xIWyI.
new QuickSort(), btU:=6
new ImprovedQuickSort(), 6Vc&g
new MergeSort(), 2;=xHt
new ImprovedMergeSort(), WUqfY?5
new HeapSort() nK|WzUtp
}; G |vG5$Nf
eMDraJv@
public static String toString(int algorithm){ SgPvQ'\
return name[algorithm-1]; 9!oNyqQ
} HWT^u$a"
'#0'_9}
public static void sort(int[] data, int algorithm) { ~!W{C_*N
impl[algorithm-1].sort(data); m|+g_JZ
} RgT|^|ZA
,_2ZKO/k$
public static interface Sort { QWV12t$v
public void sort(int[] data); S-k:+4
} 5m&Zq_Qe
o Kfm=TbY
public static void swap(int[] data, int i, int j) { ];1Mg
int temp = data; V}kQXz"9
data = data[j]; &?#G)suP
data[j] = temp; \4OX]{
} .0>2j(
} >HY( Ij<