[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; }\aJ%9X02
} <,Pk
int i1=l; .%+y_.l
int i2=mid+1; Q?{^8?7
for(int cur=l;cur<=r;cur++){ &O^t]7
if(i1==mid+1) iO{LsG*5Z
data[cur]=temp[i2++]; }o@Dsx5
else if(i2>r) &[y+WrGG
data[cur]=temp[i1++]; D`2w>{Y
else if(temp[i1] data[cur]=temp[i1++]; fsUZG6
else w'a3=_nW
data[cur]=temp[i2++]; UKp^TW1^
} 4*V[^mht
} z--Y
4>(rskl_
} IQQ QB
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改进后的归并排序: hf< [$B
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package org.rut.util.algorithm.support; dc,qQM
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import org.rut.util.algorithm.SortUtil; WXe]Q bg
Mk!bmFZOZ
/** #]@|mf q
* @author treeroot &r1]A&
* @since 2006-2-2 O*ER3
* @version 1.0 IRT0
*/ n|eM}ymF+
public class ImprovedMergeSort implements SortUtil.Sort { Nyl)B7/w
ecyN};V>
private static final int THRESHOLD = 10; o4nDjFhh
:*WiswMFm
/* w7b\?]}@
* (non-Javadoc) WlmkM?@
* my%MXTm2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p'\zL:3
*/ _[$,WuG1
public void sort(int[] data) { \"6?*L|]
int[] temp=new int[data.length]; C!W0L`r
mergeSort(data,temp,0,data.length-1); >- U+o.o
} {fS~G2@1
8QQh1q2
private void mergeSort(int[] data, int[] temp, int l, int r) { nt$q< 57
int i, j, k; !uqp?L^;
int mid = (l + r) / 2; %'.3t|zH
if (l == r) >Xw0i\G
return; C{OkbE"Vym
if ((mid - l) >= THRESHOLD) s%^@@Dk
mergeSort(data, temp, l, mid); e@7UL|12
else du_~P"[
insertSort(data, l, mid - l + 1); N."x@mV
if ((r - mid) > THRESHOLD) d8K|uEHVz
mergeSort(data, temp, mid + 1, r); zV8{|-2]No
else ~{-9qOGw;
insertSort(data, mid + 1, r - mid); U;t1 K
%BF,;(P
for (i = l; i <= mid; i++) { qIvnPaYW
temp = data; T}59m;I
} "w3%BbIx
for (j = 1; j <= r - mid; j++) { ]EqwDw4
temp[r - j + 1] = data[j + mid]; ji.T7wn1u
} 5:(/k\9+yv
int a = temp[l]; "<&) G{
int b = temp[r]; DcN!u6sJ
for (i = l, j = r, k = l; k <= r; k++) { ~]SCf@pRk
if (a < b) { /h9v'Y}c
data[k] = temp[i++]; 4))N(m%3F
a = temp; bD.KD)5
} else { CZog?O}<
data[k] = temp[j--]; b*1yvkX5
b = temp[j]; q1Mt5O}
} *auT_*
} (#8B
} z0@BBXQ`
C=qL0
/** ch33+~Nn
* @param data $i%#fN
* @param l {@hJPK8
* @param i h 27f0x9
*/ ^0&jy:{
private void insertSort(int[] data, int start, int len) { iP6?[pl8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NuW6~PV
} hR~&}sxN
} \}W !
} Z"$iB-]
} T"1=/r$Ft
X.ecA`0
堆排序： pfHfw,[
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package org.rut.util.algorithm.support; Q" r y@ (I
wHh6y?g\
import org.rut.util.algorithm.SortUtil; 8Oz9 UcG
6Ta+f3V
/** xxA^A
* @author treeroot HvmE'O8
* @since 2006-2-2 7^tYtMm|U
* @version 1.0 YdyTt5-
*/ WtO@Kf:3GH
public class HeapSort implements SortUtil.Sort{ d:"7Tw2v+
yhrjML2K
/* (non-Javadoc) @0(%ayi2Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y?U@F/^}N
*/ FC WF$'cO
public void sort(int[] data) { F)4I70vG
MaxHeap h=new MaxHeap(); n|Ts:>`V
h.init(data); %xr'96d
for(int i=0;i h.remove(); 6|IJwP^Q_
System.arraycopy(h.queue,1,data,0,data.length); EP^qj j@M
} -[}Aka,f!
d0R;|p''Z
private static class MaxHeap{ bM.$D-?dF*
Rh#`AM`)j
void init(int[] data){ oW^>J-
this.queue=new int[data.length+1]; 5zh6l+S[
for(int i=0;i queue[++size]=data; +s^nT{B@\
fixUp(size); a~?B/ g&_
} AN3oh1xe:
} z?pi/`y8>
8 Vf#t!t
private int size=0; i[I&m]N
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private int[] queue; s\<UDW
2qojU%fiH
public int get() { #%w+PL:*O
return queue[1]; maeQ'Sv_&
} \iaZV.#f
A@9\Qd
public void remove() { c91^7@Xv
SortUtil.swap(queue,1,size--); %|D)U>o{
fixDown(1); Zu2`IzrG#
} JY@bD:
file://fixdown vG7Mk8mIr
private void fixDown(int k) { 1rs.
int j; ay|jq"a
while ((j = k << 1) <= size) { <B>hvuCoH
if (j < size %26amp;%26amp; queue[j] j++; p3Ozfk
if (queue[k]>queue[j]) file://不用交换 -<9Qez)y
break; {~w(pAx
SortUtil.swap(queue,j,k); h(R7y@mp\0
k = j; V'tR \b
} Zb2PFwcy
} %8wBZ~1-
private void fixUp(int k) { $-u c#57
while (k > 1) { %|ClYr
int j = k >> 1; pL!,1D!
if (queue[j]>queue[k]) v 2p
break; p(nO~I2E
SortUtil.swap(queue,j,k); TspX7<6r
k = j; Na@;F{
} \o=9WKc
} 5gV,^[E-z
L>mM6$l
} v9FR
,]nRnI^
} ''D7Bat@
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SortUtil： 4f~sRubK
DaJ,(DJY
package org.rut.util.algorithm; <T;V9(66
*C0a,G4
import org.rut.util.algorithm.support.BubbleSort; 8EMBqhl
import org.rut.util.algorithm.support.HeapSort; cvo+{u$s
import org.rut.util.algorithm.support.ImprovedMergeSort; K F_Uu
import org.rut.util.algorithm.support.ImprovedQuickSort; !L|l(<C
import org.rut.util.algorithm.support.InsertSort; +nHr+7}
import org.rut.util.algorithm.support.MergeSort; B8?9L8M}
import org.rut.util.algorithm.support.QuickSort; kZo#Ny
import org.rut.util.algorithm.support.SelectionSort; w\0vP
import org.rut.util.algorithm.support.ShellSort; H }]Zp
H C,5j)1
/** 1h(IrV5g
* @author treeroot oV;sd5'LG
* @since 2006-2-2 uD?RL~M
* @version 1.0 \At~94
*/ .ahY 1CO
public class SortUtil { $y,KDR7^
public final static int INSERT = 1; QH4m7M@ni
public final static int BUBBLE = 2; #pgD-0_
public final static int SELECTION = 3; .P7q)lj36h
public final static int SHELL = 4; ' `c \Dq
public final static int QUICK = 5; _>]/.w2=
public final static int IMPROVED_QUICK = 6; Z.!<YfA)
public final static int MERGE = 7; 04&S.#+(
public final static int IMPROVED_MERGE = 8; 2O@ON/
public final static int HEAP = 9; I4+1P1z
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public static void sort(int[] data) { O`1!&XT{x
sort(data, IMPROVED_QUICK); 5._QI/d)'J
} 7Ok-T10
private static String[] name={ 0TA8#c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0^Vw^]w
}; $[ S 33Q
tmoCy0qWz
private static Sort[] impl=new Sort[]{ m1jEky(
new InsertSort(), 7Hv6>z#m
new BubbleSort(), 2bLc57j{`9
new SelectionSort(), `7y3C\zyQ
new ShellSort(), ;di.U,
new QuickSort(), Ws1|idAT
new ImprovedQuickSort(), t(V2
new MergeSort(), %'h:G Bkd
new ImprovedMergeSort(), PX_9i@ZG
new HeapSort() |v@_~HV
}; Og1\6Q
F.x7/;
public static String toString(int algorithm){ Rf8ZH
return name[algorithm-1]; IKnf
} CQ<d
Ye4 &4t
public static void sort(int[] data, int algorithm) { tDah@_
impl[algorithm-1].sort(data); UMBeY[?
} xi.?@Lff
#:yAi_Ct
public static interface Sort { N#jUqm
public void sort(int[] data); COm^ti-p
} 3!@&7@p
#y7MB6-
public static void swap(int[] data, int i, int j) { rA8NE>
int temp = data; RA!m,"RM
data = data[j]; mt0v (
data[j] = temp; i <gt`UCO
} 04=RoYMM
} a6ryyt 5