[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; tE@;X=
} &j4xgh9
int i1=l; a=DcZ_M
int i2=mid+1; ^cczJOxB
for(int cur=l;cur<=r;cur++){ ^aH\7J@Y
if(i1==mid+1) 5jd,{<
data[cur]=temp[i2++]; 4a'N>eDR
else if(i2>r) r<K(jG[:{f
data[cur]=temp[i1++]; GliwY_
else if(temp[i1] data[cur]=temp[i1++]; k.uMp<)D
else zaah^.MA|
data[cur]=temp[i2++]; MYla OT
} ^Wc@oa`
} 0Uo\wyd
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} AtdlZ
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改进后的归并排序: AD1=[I3
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package org.rut.util.algorithm.support; x|mqL-Q f
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import org.rut.util.algorithm.SortUtil; ]}U*_rM:
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/** p?B=1vn-2
* @author treeroot 2Ou[u#H
* @since 2006-2-2 gW-V=LV (
* @version 1.0 ft$RSb#
*/ a"FCZ.O1
public class ImprovedMergeSort implements SortUtil.Sort { BReJ!|{m}
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private static final int THRESHOLD = 10; D@Vt^_
>sK!F$
/* f>W-
* (non-Javadoc) tS|(K=$
* fjU8gV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $lLz3YS
*/ 'R c,Mq'
public void sort(int[] data) { lEhk'/~
int[] temp=new int[data.length]; R $&o*K`?
mergeSort(data,temp,0,data.length-1); *Eo?k<:zPm
} Pb?$t
TMig-y*[
private void mergeSort(int[] data, int[] temp, int l, int r) { poToeagZ~Q
int i, j, k; 5\e9@1Rc
int mid = (l + r) / 2; "tB;^jhRs
if (l == r) OU8Lldt
return; Wzw7tLY._
if ((mid - l) >= THRESHOLD) ,QcF|~n
mergeSort(data, temp, l, mid); 8>0e*jC
else +xrr?g
insertSort(data, l, mid - l + 1); f ` R/ i
if ((r - mid) > THRESHOLD) <4P4u*/o
mergeSort(data, temp, mid + 1, r); B5X(ykaX~
else .ox8*OO<
insertSort(data, mid + 1, r - mid); %d?cP}V
.7l&1C)i
for (i = l; i <= mid; i++) { *g6n
temp = data; 89o/F+_b
} NdzSz]q}
for (j = 1; j <= r - mid; j++) { ;`^WGS(3.%
temp[r - j + 1] = data[j + mid]; ;~D)~=|ZZ
} ly:q6i
int a = temp[l]; n2oz"<?$S
int b = temp[r]; W3 'q\+
for (i = l, j = r, k = l; k <= r; k++) { P/Q!<I
if (a < b) { K#pNec
data[k] = temp[i++]; ]=>F.GE
a = temp; . koYHq
} else { \'|>p/5I
data[k] = temp[j--]; mGJasn
b = temp[j]; i(>4wK!!
} ;*:Pw?'
} R'C2o]
} eD*A)
P;Ga4Q.
/** Zo g']=
* @param data ;xzUE`uUfJ
* @param l [uI|DUlI6o
* @param i Bh;7C@dq
*/ @JyK|.b#0
private void insertSort(int[] data, int start, int len) { vSi.txV2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5 N#3a0)
} )?X-(4
} v 8$>rwB
} X)7x<?DAy
} 0l-Ef1
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堆排序： J2'Nd'
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package org.rut.util.algorithm.support; Z yE `/J'
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import org.rut.util.algorithm.SortUtil; $`)/0{qY-
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/** TWQG591
* @author treeroot f!!V${)X
* @since 2006-2-2 X@K-^8
* @version 1.0 P!+'1KR
*/ cm&I* 0\
public class HeapSort implements SortUtil.Sort{ J6L K
DX"xy
/* (non-Javadoc) G0^2Wk[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6~1|qEe6I
*/ o1FF"tLkN
public void sort(int[] data) { y0'Rmk,
MaxHeap h=new MaxHeap(); PYM(Xz$
h.init(data); il:$sd
for(int i=0;i h.remove(); E )5E$
System.arraycopy(h.queue,1,data,0,data.length); =jX8.K4]
} CS==A57I
Z;:u'=
private static class MaxHeap{ 763v
*:L?#Bw
void init(int[] data){ iVy7elT;R
this.queue=new int[data.length+1]; V`bi&1?6\
for(int i=0;i queue[++size]=data; 5A sP5
fixUp(size); ,!7 H]4Qx
} ,'p2v)p^4
} \H=&`?
!+L/Khw/C
private int size=0; ]y,==1To
rld67'KcE
private int[] queue; `<\1[HJ\
X&0 uI*r
public int get() { RV5n,J
return queue[1]; uWM{JEOl
} dv.(7Y7.x
b+f'[;
public void remove() { 'J6 M*vO
SortUtil.swap(queue,1,size--); D(h18
fixDown(1); YEj8S5"Su\
} X!m9lV<
file://fixdown 20Z8HwQi
private void fixDown(int k) { b#K:_ac5
int j; O'W0q;rT
while ((j = k << 1) <= size) { { Fawt:
if (j < size %26amp;%26amp; queue[j] j++; m3mp/g.>
if (queue[k]>queue[j]) file://不用交换 >|twyb
break; "QWq_R
SortUtil.swap(queue,j,k); )tl.s)"N
k = j; +TQ47Zc
} hA33K #bC
} TJ1+g \
private void fixUp(int k) { M $Es%
while (k > 1) { .8P.)%
int j = k >> 1; JvT"bZk(o
if (queue[j]>queue[k]) }(1JaG
break; [BT/~6ovrZ
SortUtil.swap(queue,j,k); Qt/8r*Oe
k = j; Z| V`B `
} EpFQ|.mQ
} WC|.g,9#
gMaN)ESqd4
} ho0@ l
^d~1E Er
} /k<WNZM
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SortUtil： T`Mf]s)*
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package org.rut.util.algorithm; ;~\MZYs3m
[&nh5|f
import org.rut.util.algorithm.support.BubbleSort; DBCK2PlJ
import org.rut.util.algorithm.support.HeapSort; Sp^9&^
import org.rut.util.algorithm.support.ImprovedMergeSort; t| 'N+-T3
import org.rut.util.algorithm.support.ImprovedQuickSort; `$B3X
import org.rut.util.algorithm.support.InsertSort; :@!ic<p
import org.rut.util.algorithm.support.MergeSort; l?Fb ='#
import org.rut.util.algorithm.support.QuickSort; @)-$kk*
import org.rut.util.algorithm.support.SelectionSort; y^}6!>Ou:
import org.rut.util.algorithm.support.ShellSort; ^8@Iyh
|'{zri|A"
/** aMvI?y {
* @author treeroot 7 <Q5;J&;
* @since 2006-2-2 )I$q5%q8
* @version 1.0 w);6K[+;
*/ aOiR l,
public class SortUtil { tc!wLnhG
public final static int INSERT = 1; m/qbRk68s
public final static int BUBBLE = 2; /Ne<V2AX
public final static int SELECTION = 3; W@Lu;g.Yc
public final static int SHELL = 4; 6+KHQFb&N
public final static int QUICK = 5; R#DwF,
public final static int IMPROVED_QUICK = 6; 5GPo*Qpl
public final static int MERGE = 7; >$,y5 AJ&
public final static int IMPROVED_MERGE = 8; M>>qn_yq4
public final static int HEAP = 9; ,i,q!M{-
v0ES;
public static void sort(int[] data) { [w&$|h:;
sort(data, IMPROVED_QUICK); +C(/Lyo}
} EB_NK
private static String[] name={ d R]Q$CJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" X0M1(BJgGo
}; SJ};TEA
;x8k[p~2
private static Sort[] impl=new Sort[]{ *L'>U[Pl7
new InsertSort(), &_gTD
new BubbleSort(), zdEPDdB
new SelectionSort(), }LijnHH.
new ShellSort(), LI6hEcM=
new QuickSort(), Wf&W^Q
new ImprovedQuickSort(), BZXUwqEh
new MergeSort(), =T7A]U]
new ImprovedMergeSort(), *s>BG1$<
new HeapSort() 't9hXzAfW
}; D.1J_Y=9
{!K-E9_,S
public static String toString(int algorithm){ 0sh/|`\
return name[algorithm-1]; zWb4([P;
} Xj5~%DZp
XFh>U7z.
public static void sort(int[] data, int algorithm) { DmBS0NyR7Y
impl[algorithm-1].sort(data); ZKOXI%~Mc
} pOrWg@<\L
Xe^Cn R
public static interface Sort { z8J."27ND
public void sort(int[] data); fuB)qt!E
} CCX8>09
V86Xg:?7
public static void swap(int[] data, int i, int j) { LT,?$I
int temp = data; F1Hh7 F
data = data[j]; N?m0USu*
data[j] = temp; if]Noe
} PT5AA8F
} G_dsrpI=N