[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; =uYYsC\T
} 2/=l|!JKLz
int i1=l; dNL(G%Qj+"
int i2=mid+1; vbe|hO""
for(int cur=l;cur<=r;cur++){ 6?~"V
if(i1==mid+1) G@jZ)2
data[cur]=temp[i2++]; 0-yp,G
else if(i2>r) .j<]mUY
data[cur]=temp[i1++]; TXvI4"&
else if(temp[i1] data[cur]=temp[i1++]; "v({,
else ~=RT*>G_
data[cur]=temp[i2++]; KRMQtgahc
} OCaq3_#tZ
} TOXfWEU3>
f-G:uI_
} h2J/c#Qvh
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改进后的归并排序: J!pygn O
/Uy"M:|V1
package org.rut.util.algorithm.support; 9}F*P669f
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import org.rut.util.algorithm.SortUtil; T@&K-UQ
OO*zhGD;[
/** d,Yw5$i
* @author treeroot P&ptJtNg
* @since 2006-2-2 6'G6<8>-
* @version 1.0 Jx](G>F4f1
*/ yS(fILV
public class ImprovedMergeSort implements SortUtil.Sort { v8[I8{41
usK*s$ns
private static final int THRESHOLD = 10; 8hJ%JEzga
RA'M8:$
/* $jI3VB
* (non-Javadoc) cir$voL
* 5aZ2j26
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4DOH`6#an
*/ "ZsOd>[/
public void sort(int[] data) { p=GBUII #
int[] temp=new int[data.length]; g<f <Ip=
mergeSort(data,temp,0,data.length-1); N&g3t%F
} nR}sNl1
LzXmb 7A
private void mergeSort(int[] data, int[] temp, int l, int r) { 6NM:DI\%
int i, j, k; i}mVQ\j5
int mid = (l + r) / 2; RcM/!,B
if (l == r) 2Mvrey)
return; F9E<K]7K
if ((mid - l) >= THRESHOLD) ,<tX%n`v=
mergeSort(data, temp, l, mid); +|'c>,?2H
else _Wp{[TH
insertSort(data, l, mid - l + 1); b#toM';T
if ((r - mid) > THRESHOLD) X#TQ_T"
mergeSort(data, temp, mid + 1, r); lG!|{z7+0
else v)l8@.
insertSort(data, mid + 1, r - mid); 9- YwkK#z
^O<&fD
for (i = l; i <= mid; i++) { J|kR5'?x
temp = data; ()Y4v
} TKY*`?ct
for (j = 1; j <= r - mid; j++) { ,t9^j3Ixg
temp[r - j + 1] = data[j + mid]; y4I6
} :'3XAntZA
int a = temp[l]; MVTMwwO\[
int b = temp[r]; w?wG(+X7
for (i = l, j = r, k = l; k <= r; k++) { vss(twg
if (a < b) { : $Y9jR
data[k] = temp[i++]; E2@65b$
a = temp; Q<'nE
} else { dzsmIV+
data[k] = temp[j--]; v7jq@#-
b = temp[j]; P&)xz7wG
} !GLz)#SBl
} ,)Ju[
} 9N<<{rQ,F
/F-qP.<D,r
/** ;":zkb{
* @param data */|lJm'R
* @param l 5JCG2jqx0
* @param i y8L D7<1u
*/ W<$Z=(_v
private void insertSort(int[] data, int start, int len) { Iw&vTU=2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {fF3/tL
} k*E\B@W>
} )- viGxJ@
} iH@yCNE"
} VsgE!/>1
qY<'<T4\
堆排序： ujaGNg?,
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package org.rut.util.algorithm.support; (?`kYTw7g'
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import org.rut.util.algorithm.SortUtil; z4+k7a@jn
[16cFqD
/** T:Hr&ws4
* @author treeroot M?:c)&$]D
* @since 2006-2-2 OK6]e3UO
* @version 1.0 ;04Ldb1{|3
*/ e8]\U/
public class HeapSort implements SortUtil.Sort{ 8V)^R(\;
r>"
/* (non-Javadoc) RGg(%.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n'01Hh`0
*/ oA7;.:3
public void sort(int[] data) { V7[zAq
MaxHeap h=new MaxHeap(); LbG_z =A
h.init(data); J'fQW<T4wU
for(int i=0;i h.remove(); jbu8~\"
System.arraycopy(h.queue,1,data,0,data.length); U.XNv-M
} \"^w'ng
=fve/_Q~
private static class MaxHeap{ sqJSSNt
+~roU{& o
void init(int[] data){ ?~;:jz|9<'
this.queue=new int[data.length+1]; ]dk8lZ;bo
for(int i=0;i queue[++size]=data; YZ7|K<
fixUp(size); 8` @G;o
} W4e5Rb4~f"
} ryCI>vJz
AvSM^
private int size=0; .J.-Mm`.
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private int[] queue; T ;vF(
Ucm :S-
public int get() { Nwt" \3
return queue[1]; Bj}^\Pc;}
} 2eC(Ijq[a
!V\Q<So<
public void remove() { T G{k0cdOT
SortUtil.swap(queue,1,size--); t{FlB!jv
fixDown(1); ;._7jFj.
} 4Hn`'+b
file://fixdown no]z1D
private void fixDown(int k) { wUQw!%?>
int j; 0iK;Egwm
while ((j = k << 1) <= size) { {h2TD P
if (j < size %26amp;%26amp; queue[j] j++; +$(2:S*r
if (queue[k]>queue[j]) file://不用交换 K+8-9$w6
break; Q7C;1aO
SortUtil.swap(queue,j,k); 4*mS y
k = j; EG0auzW?
} \eb|eN0i
} &q~:~
private void fixUp(int k) { P*@2.#oO
while (k > 1) { ~L_hZso4
int j = k >> 1; EV^~eTz
if (queue[j]>queue[k]) -gas?^`
break; .E&z$N
SortUtil.swap(queue,j,k); YJ/zU52JK~
k = j; oY|,GvCnK
} MR,R}B$
} I,VH=Yn5,
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} Cc<,z*T
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} ]f: v,a
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SortUtil： -zO2|@S,
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package org.rut.util.algorithm; k`9)=&zX+
`S.ZS}~!F
import org.rut.util.algorithm.support.BubbleSort; )0e2ic/
import org.rut.util.algorithm.support.HeapSort; -,aeM~
import org.rut.util.algorithm.support.ImprovedMergeSort; RQp|T5Er*
import org.rut.util.algorithm.support.ImprovedQuickSort; !>`N$-U X
import org.rut.util.algorithm.support.InsertSort; ;Y mTw
import org.rut.util.algorithm.support.MergeSort; "zY](P
import org.rut.util.algorithm.support.QuickSort; e9Pk"HHl
import org.rut.util.algorithm.support.SelectionSort; ~-t>z
import org.rut.util.algorithm.support.ShellSort; "t$k
f\1A!Yp
/** e)IpPTj#
* @author treeroot 3ZZV<SS
* @since 2006-2-2 iQ6epg1wB
* @version 1.0 lz0TK)kuC
*/ TO*BH^5R
public class SortUtil { ^o@,3__7Q
public final static int INSERT = 1; $DC*i-}qFg
public final static int BUBBLE = 2; iy\nio`
public final static int SELECTION = 3; st&
public final static int SHELL = 4; 2Nm>5l
public final static int QUICK = 5; :BukUket1e
public final static int IMPROVED_QUICK = 6; he-Ji
public final static int MERGE = 7; +"}=d3E6
public final static int IMPROVED_MERGE = 8; eo!zW
public final static int HEAP = 9; jWO/ xX
GK}'R=
public static void sort(int[] data) { !W'Ui 9uX
sort(data, IMPROVED_QUICK); ~!d/8?!
} {(#%N5%
private static String[] name={ Hb(B?!M)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 16EVl~LN
}; 6vTo*8D
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private static Sort[] impl=new Sort[]{ qcJft'>F
new InsertSort(), Op?OruT[
new BubbleSort(), Lru-u:
new SelectionSort(), BH@)QVs-
new ShellSort(), cx$Gic:4
new QuickSort(), 1b>C<\
new ImprovedQuickSort(), ORWm C!
new MergeSort(), &G>(9
new ImprovedMergeSort(), [;oCYb$9
new HeapSort() ,chf~-d
}; dj&}Gedy
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public static String toString(int algorithm){ 3q:{1rc
return name[algorithm-1]; #Hh^3N
} LsGiu9~S
/DO/Tqdfe
public static void sort(int[] data, int algorithm) { b2^AP\: k
impl[algorithm-1].sort(data); uw7{>9
} _uu<4c
cj|*_}
public static interface Sort { u%dKig
public void sort(int[] data); %_aMl
} w$5A|%Y+V}
PS" .R_"
public static void swap(int[] data, int i, int j) { wFIh6[3
int temp = data; KZ:8[d
data = data[j]; MZSxQ8
data[j] = temp; Ti;Ijcq8
} fKa\7{R
} xg{HQQ|TC