[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; lz/8
} =h-U
int i1=l; t0(A4E
int i2=mid+1; DMAIM|h
for(int cur=l;cur<=r;cur++){ T"(&b~m2b4
if(i1==mid+1) 1Rt33\1J0
data[cur]=temp[i2++]; hnffz95
else if(i2>r) +xRK5+}9
data[cur]=temp[i1++]; L\37xJo
else if(temp[i1] data[cur]=temp[i1++]; TeMHm?1^
else b}2ED9HG\
data[cur]=temp[i2++]; HNb/-e ,"
} S%$ }(
} JL`-0P<M
~jWn4 \
} L{#IT.
\J4L:.`qS
改进后的归并排序: t DO=P c
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package org.rut.util.algorithm.support; =R^%(Py
aJSO4W)P
import org.rut.util.algorithm.SortUtil; cA&9e<
L s G\OG
/** $6qh| >z.
* @author treeroot gLb`pCo/
* @since 2006-2-2 2ElJbN#
* @version 1.0 ~b(i&DVK
*/ @tF\p
public class ImprovedMergeSort implements SortUtil.Sort { \|n- O=}=2
gGR"Z]DBk
private static final int THRESHOLD = 10; *~2,/D
XP`Nf)3{Yd
/* Qu"8(Jk/
* (non-Javadoc) af6M,{F
* t;){D:]k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &]Q@7Nl7:l
*/ o m!!Sl3
public void sort(int[] data) { /hpY f]t
int[] temp=new int[data.length]; c|f<u{'
mergeSort(data,temp,0,data.length-1); |a8iZ9/D6
} B=U 3
dR K?~1
private void mergeSort(int[] data, int[] temp, int l, int r) { 0q^>ZF-@
int i, j, k; x!hh"x
int mid = (l + r) / 2; _PPy44r2
if (l == r) jY&k
return; uY0lR:|
if ((mid - l) >= THRESHOLD) T!uM+6|Y
mergeSort(data, temp, l, mid); QER?i;-wb
else !zBhbmlKt
insertSort(data, l, mid - l + 1); \h+AXs<j
if ((r - mid) > THRESHOLD) JX<)EZ!F
mergeSort(data, temp, mid + 1, r); &g#@3e1>
else }?lrU.@zg
insertSort(data, mid + 1, r - mid); sm9k/(-
_qU4Fadgm
for (i = l; i <= mid; i++) { C=-=_>Q,L<
temp = data; 3W V"U
} 3\AU 72-
for (j = 1; j <= r - mid; j++) { '-wj9OU
temp[r - j + 1] = data[j + mid]; ( B!uy`
} n*o-Lo+Fe.
int a = temp[l]; f0!))/rSD
int b = temp[r]; ~cWAl,(B<F
for (i = l, j = r, k = l; k <= r; k++) { %Celc#v
if (a < b) { Ii6<b6-
data[k] = temp[i++]; AWcLUe{
a = temp; 5sdn[Tt##
} else { "<6G6?sz
data[k] = temp[j--]; P)"noG_'i
b = temp[j]; C^s^D:
} {baq+
} =NpYFKmMhV
} FW.7'7G@n
z Eq GD2"
/** 57aXQ8u{
* @param data XFg9P}"
* @param l m)8BgCy
* @param i v0ujdp,B
*/ vx\r!]
private void insertSort(int[] data, int start, int len) { ih)zG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xg30xC[
} Gw=B:kGk
} ?yZ+D z\
} j 7fL7:,T
} $yN{-T"
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堆排序： #||}R[~P"
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package org.rut.util.algorithm.support; ><RpEnWZ<
G, 44va
import org.rut.util.algorithm.SortUtil; p5Z"|\
<5d~P/,
/** FO+Zue.RS
* @author treeroot `-.%^eIp
* @since 2006-2-2 svsqg{9z
* @version 1.0 LU \i0|i|
*/ #r$cyV!k
public class HeapSort implements SortUtil.Sort{ ks&*O!h
Ki4r<>\l{H
/* (non-Javadoc) F7A=GF'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )(A]Ln4
*/ q6@Lp^f
public void sort(int[] data) { v5/~-uRL%
MaxHeap h=new MaxHeap(); @_-hk|Nl@
h.init(data); $>G8_q
for(int i=0;i h.remove(); EH$1fvE
System.arraycopy(h.queue,1,data,0,data.length); .>q8W
} oOnop-z7
8k2?}/+
private static class MaxHeap{ 6RG)`bu
VX].3=T8
void init(int[] data){ kC WEtbz1
this.queue=new int[data.length+1]; %!]@J[*1
for(int i=0;i queue[++size]=data; 6q*9[<8
fixUp(size); @u.58H& }R
} t 4PK}>QW
} 3Ko/{f
" f <Z=c
private int size=0; k;2GEa]w
g=39C>
private int[] queue; $g@=Z"
1uG"f<TsR
public int get() { "&%I)e^
return queue[1]; 0+iu(VbF
} Y}x>t* I
4^:\0UF
public void remove() { 4Z1ST;
SortUtil.swap(queue,1,size--); 2!0c4a^z
fixDown(1); 2n3W=dF
} 0f~C#/[t7
file://fixdown ,kF1T,
private void fixDown(int k) { N<|@ymi
int j; uvMy^_}L
while ((j = k << 1) <= size) { 0QFS
if (j < size %26amp;%26amp; queue[j] j++; zxMXXm;
if (queue[k]>queue[j]) file://不用交换 ^2+yHw
break; $()5VMb
SortUtil.swap(queue,j,k); fo5iJz"Z
k = j; vo`2\R.
} PjZvQ\Z
} 0M*Z'n +
private void fixUp(int k) { $g/SWq
while (k > 1) { ~Am,%"%\
int j = k >> 1; .}^g!jm~h
if (queue[j]>queue[k]) XJ;D=~
break; E'G4Y-
SortUtil.swap(queue,j,k); R?68*} `7
k = j; RzBF~2 >i
} &atuK*W>
} esHg'8?U
)+l\w3^6
} lm!.W5-l
u&`XB|~
} G.rrv
|*:'TKzNS
SortUtil： ,#Iu 7di
}#.L7SIJ<J
package org.rut.util.algorithm; "*m_> IU
j2ve^F:Q
import org.rut.util.algorithm.support.BubbleSort; >{N9kWY
import org.rut.util.algorithm.support.HeapSort; *-MM<|Qt
import org.rut.util.algorithm.support.ImprovedMergeSort; NYE`Kin-
import org.rut.util.algorithm.support.ImprovedQuickSort; %JXE5l+pJ
import org.rut.util.algorithm.support.InsertSort; QOjqQfmM;
import org.rut.util.algorithm.support.MergeSort; :ZTc7}
import org.rut.util.algorithm.support.QuickSort; :e]a$
import org.rut.util.algorithm.support.SelectionSort; 8C[C{qOJ
import org.rut.util.algorithm.support.ShellSort; plUZ"Tr
M\sN@+
/** ]+(6,ct&.
* @author treeroot mFg<dTx0c8
* @since 2006-2-2 h?rp|uPQ
* @version 1.0 'h/CoTk@,
*/ ad.3A{
public class SortUtil { I Y2)?"A
public final static int INSERT = 1; r YogW!
public final static int BUBBLE = 2; o}W%I/s
public final static int SELECTION = 3; 74H)|Dkx
public final static int SHELL = 4; %70~M_
public final static int QUICK = 5; L%BNz3:Dt
public final static int IMPROVED_QUICK = 6; k40* e\
public final static int MERGE = 7; Y]NSN-t
public final static int IMPROVED_MERGE = 8; \]&#%6|V
public final static int HEAP = 9; qDv93
)>.&N[v
public static void sort(int[] data) { sArhZ[H
sort(data, IMPROVED_QUICK); Y<mej][
} E}Y!O"CAV
private static String[] name={ )f}YW/'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R<[qGt|L
}; :A1{d?B
Qy.w=80kf
private static Sort[] impl=new Sort[]{ _9JhL:cY
new InsertSort(), cV 5CaaL
new BubbleSort(), 6I1,:nLL<
new SelectionSort(), )=5ng-
new ShellSort(), 3{ LP?w:@
new QuickSort(), Pf|siC^;s~
new ImprovedQuickSort(), X}tVmO?
new MergeSort(), 94+KdHAo^M
new ImprovedMergeSort(), k *Q<3@S
new HeapSort() ZT,B(#m
}; T? tG~
])L A42|
public static String toString(int algorithm){ CZ(/=3,3n
return name[algorithm-1]; & @s!<9$W
} KHgBo}6
@n(Z$)8tR
public static void sort(int[] data, int algorithm) { dE:+k/
impl[algorithm-1].sort(data); Pdt6nzfr
} ZkAU17f
&GlwC%$S
public static interface Sort { U4gF(Q
public void sort(int[] data); '@p['#\uI
} @c<3b2
LUuZ9$t0J"
public static void swap(int[] data, int i, int j) { 6xWe=QGE
int temp = data; 'f[T&o&L/
data = data[j]; '<rZm=48
data[j] = temp; zRq-b`<7V
} 30XR 82P/
} sA'6ty