[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; 7 n=fB#!*3
} ( nH3
int i1=l; U0:tE>3`
int i2=mid+1; 2x7%6'
for(int cur=l;cur<=r;cur++){ mmj6YQ0a
if(i1==mid+1) ES#K'Lf
data[cur]=temp[i2++]; }TCOm_Y/qL
else if(i2>r) E|Lv_4lb=
data[cur]=temp[i1++]; %r*zd0*<n1
else if(temp[i1] data[cur]=temp[i1++]; c|'hs
else }~RH!Q1
data[cur]=temp[i2++]; ,4wZ/r> d
} Dab1^H!KT
} JUlV$b.)J
E}$K&<J'-
} -l!;PV S|
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改进后的归并排序: >Cjb|f3'i}
W%=b|6E
package org.rut.util.algorithm.support; T?+xx^wYk
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import org.rut.util.algorithm.SortUtil; 2ajQ*aNq
MyOdWD&7
/** b)A$lP%`
* @author treeroot [yF4_UoF
* @since 2006-2-2 f&S,l3H<
* @version 1.0 sGCV um}
*/ WBA0! g98
public class ImprovedMergeSort implements SortUtil.Sort { *zy0,{bl
dB`YvKr#
private static final int THRESHOLD = 10; 9*%Uoy:
;,y9
/* zA![c l>$
* (non-Javadoc) EnrRnVB
* RJ%~=D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l*]L=rC
*/ By8C-jD
public void sort(int[] data) { ^L;`F
int[] temp=new int[data.length]; yp=2nU"o
mergeSort(data,temp,0,data.length-1); LV&tu7c
} ^6~CA
(l.`g@(L
private void mergeSort(int[] data, int[] temp, int l, int r) { 5s>$
int i, j, k; zX!zG<<K
int mid = (l + r) / 2; A}b<Lg
if (l == r) otXB:a
return; P(W7,GD,k
if ((mid - l) >= THRESHOLD) /R< Q~G|\
mergeSort(data, temp, l, mid); rBP!RSl1
else *fq=["O
insertSort(data, l, mid - l + 1); Nd&u*&S
if ((r - mid) > THRESHOLD) eD*"#O)W
mergeSort(data, temp, mid + 1, r); ".qh]RVjV
else :_tsS)Q2m
insertSort(data, mid + 1, r - mid); %cD7}o:u
5M~\'\;
for (i = l; i <= mid; i++) { IiACr@[?e
temp = data; zb}:wUR
} /0 ,#c2aq
for (j = 1; j <= r - mid; j++) { %/H
temp[r - j + 1] = data[j + mid]; @fp(uu
} )jp#|#h
int a = temp[l]; B_[^<2_
int b = temp[r]; <3QE3;4
for (i = l, j = r, k = l; k <= r; k++) { tWi@_Rlx;
if (a < b) { k[N46=u
data[k] = temp[i++]; i+&*W{Re
a = temp; "6n~,$
} else { Pb.-Z@
data[k] = temp[j--]; A8OV3h6]
b = temp[j]; S*:b\{[f>
} ;""V s6
} ;h3uMUCml
} nVoPTr
Jjz:-Uqq2
/** +E QRNbA
* @param data )L`0VTw'M
* @param l 16o3ER
* @param i z@cL<.0CE
*/ &gkloP@
private void insertSort(int[] data, int start, int len) { pd,5.d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); kzGD*
} RaAi9b[/S
} C}+w<
} 2_0OSbFv'P
} UGEC_
q]tPsX5{*
堆排序： J;+iW*E:
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package org.rut.util.algorithm.support; 3a_S-&?X
jjkiic+tDN
import org.rut.util.algorithm.SortUtil; W\zg#5fmK
qU#Gz7/
/** q[l},nw
* @author treeroot 7,_N9Q]rB
* @since 2006-2-2 AMvM H
* @version 1.0 TC3xrE:U<m
*/ mz[rB|v"/7
public class HeapSort implements SortUtil.Sort{ w/N.#s^
G;FY2;adK
/* (non-Javadoc) q?&vV`PG5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -.1x!~.jX
*/ (eN\s98)/
public void sort(int[] data) { 0,nDyTS^
MaxHeap h=new MaxHeap(); ]xA;*b;|h
h.init(data); uU6+cDp
for(int i=0;i h.remove(); 7[:9vY
System.arraycopy(h.queue,1,data,0,data.length); DPi%[CRH
} ;]MHU/
$r9Sn
private static class MaxHeap{ H(!)]dO
U=p,drF,A
void init(int[] data){ BULX*eOt
this.queue=new int[data.length+1]; ]~)FMWQz-
for(int i=0;i queue[++size]=data; _odP:
fixUp(size); 6Ez}A|i
} ge[f/"u
} Q,Hw@w<1
{Os$Uui37\
private int size=0; qp_kILo~
IC/'<%k
private int[] queue; O(h4;'/E
X&t)S?eCos
public int get() { Nj qUUkc
return queue[1]; y:D|U!o2V
} *8fnxWR
@P4fR7
public void remove() { Tl%#N"
SortUtil.swap(queue,1,size--); :p(3Ap2TY
fixDown(1); gc7S_D~;
} MMD4b}p
file://fixdown 3.?PdK&C
private void fixDown(int k) { Ej ip%m
int j; 4\Y2{Z>P?
while ((j = k << 1) <= size) { b|wCR%
if (j < size %26amp;%26amp; queue[j] j++; "Nn/vid;
if (queue[k]>queue[j]) file://不用交换 NHUx-IqOX
break; G{i}z^n
SortUtil.swap(queue,j,k); <u*~RYA2
k = j; s6rdQI]
} M/ 0!B_(R
} P8Fq %k
private void fixUp(int k) { d /jO~+jP
while (k > 1) { .-'
int j = k >> 1; Gb<)U[Hfd
if (queue[j]>queue[k]) t%n1TY,
break; UBrYN'QRNt
SortUtil.swap(queue,j,k); Ja|! fT
k = j; ,-&ler~[
} *]p]mzc
} C6ZM#}I$l
T#Qn\8
} { o=4(RC
YL=?Nk/
} AM1J ^Dp
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SortUtil： OA_:_%a(
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package org.rut.util.algorithm; Mje6Q
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import org.rut.util.algorithm.support.BubbleSort; xpKD 'O=T
import org.rut.util.algorithm.support.HeapSort; lq}=&)%C
import org.rut.util.algorithm.support.ImprovedMergeSort; +iir]"8
import org.rut.util.algorithm.support.ImprovedQuickSort; !,+peMy
import org.rut.util.algorithm.support.InsertSort; 5v=%pQbY
import org.rut.util.algorithm.support.MergeSort; &eG,CIT
import org.rut.util.algorithm.support.QuickSort; > F&Wuf
import org.rut.util.algorithm.support.SelectionSort; AiykIER/
import org.rut.util.algorithm.support.ShellSort; ny|ni\6
5*{U!${a
/** !1]72%k[
* @author treeroot [2gK^o&t
* @since 2006-2-2 @|6n.'f+
* @version 1.0 x^qmYX$'1b
*/ ><viJ$i
public class SortUtil { WQ<J<$$uu
public final static int INSERT = 1; { ,/mQ3
public final static int BUBBLE = 2; 3 ~0Z.!O
public final static int SELECTION = 3; iJk`{P_
public final static int SHELL = 4; z[B*sbS
public final static int QUICK = 5; QDRSQ[\
public final static int IMPROVED_QUICK = 6; PCH&eTKN
public final static int MERGE = 7; RRqHo~*0
public final static int IMPROVED_MERGE = 8; )dbi
public final static int HEAP = 9; W^ict,t
nKp='>Th
public static void sort(int[] data) { 5*xk8*
sort(data, IMPROVED_QUICK); xI55pj*
} H`G[QC
private static String[] name={ Qa~o'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E'?yI'~=
}; D+]#qS1q
CDQ}C=4
private static Sort[] impl=new Sort[]{ _{)e\n
new InsertSort(), $*V:;-H
new BubbleSort(), w7$*J:{
new SelectionSort(), Q9H~B`\nQ
new ShellSort(), D'F=v\P
new QuickSort(), f ."bq43(
new ImprovedQuickSort(), ~C6d5\
new MergeSort(), ?1K|.lr
new ImprovedMergeSort(), //nR=Dy{
new HeapSort() nPj%EKdY4
}; INOw0E[
ya0L8`q
public static String toString(int algorithm){ !jL|HwlA
return name[algorithm-1]; UB }n=
} v=EV5#A
0'wB':v
public static void sort(int[] data, int algorithm) { 47ra`*
impl[algorithm-1].sort(data); "jH=O(37
} "G-} wt+P
L!Iu\_{q
public static interface Sort { eEePK~%c
public void sort(int[] data); <RS@,
} laG@SV
l&S2.sC
public static void swap(int[] data, int i, int j) { 1P:r=Rt/
int temp = data; AC@WhL
data = data[j]; o7)<pfif
data[j] = temp; S#Tc{@e
} l)m\i_r:
} lG/M%i