[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; %N>\:85?
} 8.[&wyU
int i1=l; XzW7eO,A
int i2=mid+1; .uBO
for(int cur=l;cur<=r;cur++){ rAM*\=
if(i1==mid+1) &;Ed*OJ
data[cur]=temp[i2++]; Oy:QkV9
else if(i2>r) =w?M_[&K)
data[cur]=temp[i1++]; ^l--zzO8l
else if(temp[i1] data[cur]=temp[i1++]; abL/Y23 "
else FOc|*>aKP
data[cur]=temp[i2++]; G *ds4R?!
} :fRmUAK%
} Z^{+,$H@
ix^gAot
} E2kW=6VO>|
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改进后的归并排序: TeKC} NW
qQL.c+%L
package org.rut.util.algorithm.support; 5dqQws-,?1
7Pwg+|
import org.rut.util.algorithm.SortUtil; qw|JJ
o>@=N2n
/** -MDOZz\
* @author treeroot )@!~8<_"
* @since 2006-2-2 kJI3`gS+
* @version 1.0 <b6s&"%=
*/ 7AI3|Ts]p
public class ImprovedMergeSort implements SortUtil.Sort { J`YnT
@+iC/
private static final int THRESHOLD = 10; 4 #aqz9k
%)8d{1at
/* Ica3
* (non-Javadoc) 4sb )^3T
* xIM8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =Na/3\^WP
*/ qx Wgt(Os
public void sort(int[] data) { IY V-*/ |
int[] temp=new int[data.length]; 3\7'm]
mergeSort(data,temp,0,data.length-1); Vu_&~z7h
} Z"-ntx#
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private void mergeSort(int[] data, int[] temp, int l, int r) { #m[vn^8B]y
int i, j, k; (L`l+t1
int mid = (l + r) / 2; ;0;3BH A
if (l == r) f9vcf# 2
return; ~l(G6/R
if ((mid - l) >= THRESHOLD) |^Y*~d<H
mergeSort(data, temp, l, mid); m~##q}LZ
else v>rqOI
insertSort(data, l, mid - l + 1); *4-r`k|@>/
if ((r - mid) > THRESHOLD) Ok*VQKyDLH
mergeSort(data, temp, mid + 1, r); 7X(rLd 6#
else MhHr*!N"}
insertSort(data, mid + 1, r - mid); 4,j4E@?pG9
tDEXm^B2Sv
for (i = l; i <= mid; i++) { 9cVn>Fb
temp = data; Km[]^;6
} fB_4f{E
for (j = 1; j <= r - mid; j++) { w}IL 8L(D
temp[r - j + 1] = data[j + mid]; 4Sg<r,G
} \H,V 9!B
int a = temp[l]; +]A+!8%Z
int b = temp[r]; iPA@<D%
for (i = l, j = r, k = l; k <= r; k++) { -zPm{a
if (a < b) { Dm>T"4B`/
data[k] = temp[i++]; o~Bk0V=
a = temp; zA2UFax=
} else { 01&*`0?
data[k] = temp[j--]; iSOD&J_
b = temp[j]; ;n3uV`\
} sXSj OUI
} [Xs}FJ
} WH{cJ7wCL
\#uqD\DE
/** +A'}PXm*tu
* @param data v>JB rIb$
* @param l 'u4}t5Bu5
* @param i g@$0FY{Q
*/ }UyzMy,
private void insertSort(int[] data, int start, int len) { h{Oz*Bq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Sja"(sJ
} U,oD44
} 4aj[5fhb-
} t9-_a5>E\}
} w~bG<kxP
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堆排序： $~ pr+Ei
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package org.rut.util.algorithm.support; F?}m8ZRv
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import org.rut.util.algorithm.SortUtil; 3{.9O$
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/** /IGrp.}
* @author treeroot A>qd2
* @since 2006-2-2 1gF*Mf_7
* @version 1.0 V_NjkyI
*/ w:m'uB%W
public class HeapSort implements SortUtil.Sort{ ],BJ}~v,X
({*.!ty
/* (non-Javadoc) vS~AxeW/7R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F7k4C2r
*/ C\;;9
public void sort(int[] data) { P Xyyyir{
MaxHeap h=new MaxHeap(); ?9o#%?6k
h.init(data); 2&^,IIp
for(int i=0;i h.remove(); hXV4$Dai
System.arraycopy(h.queue,1,data,0,data.length); /V#MLPA
} 5A0KV7N5
nG&w0de<>
private static class MaxHeap{ T+&x{+gZ
h1Ke$#$6
void init(int[] data){ sq8tv]
this.queue=new int[data.length+1]; N&R '$w
for(int i=0;i queue[++size]=data; U92B+up-
fixUp(size); f9h:"Dnzin
} OlD7-c2L]
} Ktg&G<%J0
1G e)p4
private int size=0; Y;a6:>D%cT
J,dG4.ht
private int[] queue; }M"-5K}
>i><s>=I`
public int get() { "wc`fg"3
return queue[1]; [15hci+-
} b&hF')_UOz
UiGUaBmF*
public void remove() { ~G|{qVO7A
SortUtil.swap(queue,1,size--); >#${.+y
fixDown(1); 9*GL@_c
} sqq/b9 uL/
file://fixdown &(z8GYBr
private void fixDown(int k) { x9XGCr
int j; uAPLT~
while ((j = k << 1) <= size) { j8D$/
if (j < size %26amp;%26amp; queue[j] j++; @F""wKnV
if (queue[k]>queue[j]) file://不用交换 puf;"c6e'
break; rsIt~w
SortUtil.swap(queue,j,k); x|~D(zo
k = j; BDB zc5Q(
} K8Kz
} 2i4Dal
private void fixUp(int k) { K'{wncumQ
while (k > 1) { MJ*oeI!.=
int j = k >> 1; .@x"JI>;
if (queue[j]>queue[k]) 'vf,T4uQ"
break; ,M+h9_&0?
SortUtil.swap(queue,j,k); S7\|/h:4
k = j; ;6\Ski0=l
} e>)}_b
} >mGGJvTx
`Tm8TZd66
} tyGnG0GK
g,z&{pZch
} gZ79u
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SortUtil： ]aL [
#!<+:y'S?
package org.rut.util.algorithm; %r}KvJgd
V,"AG
import org.rut.util.algorithm.support.BubbleSort; \fQgiX
import org.rut.util.algorithm.support.HeapSort; %n V@'3EI
import org.rut.util.algorithm.support.ImprovedMergeSort; r*
import org.rut.util.algorithm.support.ImprovedQuickSort; sDh6 Uk
import org.rut.util.algorithm.support.InsertSort; v J,xz*rc`
import org.rut.util.algorithm.support.MergeSort; hQW#a]]V:
import org.rut.util.algorithm.support.QuickSort; $[^ KCNB
import org.rut.util.algorithm.support.SelectionSort; =t>`<T|(
import org.rut.util.algorithm.support.ShellSort; ZRVF{D??"%
-*]9Ma<wa
/** [{.\UkV@
* @author treeroot +kdU%Sm
* @since 2006-2-2 Ff1M~MhG
* @version 1.0 *{4{<O<4
*/ sN[@mAoH
public class SortUtil { >P]I&S-.
public final static int INSERT = 1; H$($l<G9C
public final static int BUBBLE = 2; ={&TeMMA
public final static int SELECTION = 3; `[W)6OUCx}
public final static int SHELL = 4; U:5*i
public final static int QUICK = 5; :ayO+fr#
public final static int IMPROVED_QUICK = 6; |[n|=ORI'
public final static int MERGE = 7; ="[+6X
public final static int IMPROVED_MERGE = 8; YM,D`c[pX
public final static int HEAP = 9; !Z9ikn4A
1<Ztk;$A
public static void sort(int[] data) { []]LyWk
sort(data, IMPROVED_QUICK); HWao3Lz
} 5kL#V
private static String[] name={ `A}{ I}xq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" eJwii
}; :XZJxgx
*rMN,B@
private static Sort[] impl=new Sort[]{ <?`e9o
new InsertSort(), qo&SJDG
new BubbleSort(), h19.b:JT
new SelectionSort(), ",,qFM!
new ShellSort(), khO<Z^wi[
new QuickSort(), "N[gMp6U
new ImprovedQuickSort(), xBx?>nN
new MergeSort(), f"}14V
new ImprovedMergeSort(), d'eM(4R@
new HeapSort() b ffml
}; >Gu>T\jpe.
P$#}-15?|_
public static String toString(int algorithm){ Yhv`IV-s
return name[algorithm-1]; rq|czQ
} TY{?4
t+Tg@~K2[>
public static void sort(int[] data, int algorithm) { u[% J#S
impl[algorithm-1].sort(data); ?[|4QzR
} MrygEC 5
p44uozbK
public static interface Sort { c=c.p i"s
public void sort(int[] data); OKNs (H
} oz5lt4
K|' ]Hje\
public static void swap(int[] data, int i, int j) { qm&53
int temp = data; $EHn;~w T
data = data[j]; Ns7l-mb
data[j] = temp; J,2v~Dq
} ',-X#u
} (fjXp75