[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; s)DNLx
} ,a_{ Y+
int i1=l; _BLSI8!N@
int i2=mid+1; Y <i}"eI*
for(int cur=l;cur<=r;cur++){ -"dy z(
if(i1==mid+1) k$x 'v#
data[cur]=temp[i2++]; f!8m
else if(i2>r) rB&j"p}Q
data[cur]=temp[i1++]; bvu<IXX=2
else if(temp[i1] data[cur]=temp[i1++]; 6M vRR
else ?O>JtEz~lQ
data[cur]=temp[i2++]; i~s9Ot
} . N} }cJq
} qjEWk."
!2M[
} *7fPp8k+Z;
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改进后的归并排序: 2gR_1*|
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package org.rut.util.algorithm.support; Q2pboZ86
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import org.rut.util.algorithm.SortUtil; YGpp:8pen
70*iJ^|
/** j{-7Pf8A
* @author treeroot PEn^.v@
* @since 2006-2-2 BRzWZq%r3
* @version 1.0 >rS<!e%
*/ :w_1J'D}
public class ImprovedMergeSort implements SortUtil.Sort { Qg$Nj=Cw
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private static final int THRESHOLD = 10; _@;3$eB
8=o5;]Cg
/* ?CZD^>6
* (non-Javadoc) BW-P%:B1!R
* 9Kx:^~}20o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j!o3g;j
*/ HV7(6VSJ+
public void sort(int[] data) { o9d$ 4s@/
int[] temp=new int[data.length]; 7-g4S]r<
mergeSort(data,temp,0,data.length-1); TY[d%rMm
} Y@S6m@.$
zXU{p\;)\
private void mergeSort(int[] data, int[] temp, int l, int r) { "t&k{\$\
int i, j, k; Cj9O[
int mid = (l + r) / 2; {,2_K6#
if (l == r) ^o\p|f>f
return; q/-j`'A_pb
if ((mid - l) >= THRESHOLD) Q~!hr0 ZR
mergeSort(data, temp, l, mid); +ENW=N
else .eXA.9|jm
insertSort(data, l, mid - l + 1); ?q}wl\"8
if ((r - mid) > THRESHOLD) `e|Lw
mergeSort(data, temp, mid + 1, r); ^J~4~!
else yzR=:0J
insertSort(data, mid + 1, r - mid); RAQ;O
"$cT*}br
for (i = l; i <= mid; i++) { ,[1`'nN@g
temp = data; .p~;U|h"
} o(NyOC
for (j = 1; j <= r - mid; j++) { $<mL2$.L~
temp[r - j + 1] = data[j + mid]; j6(IF5MqP
} lfeWtzOf
int a = temp[l]; % peb{i
int b = temp[r]; <OfzE5
for (i = l, j = r, k = l; k <= r; k++) { cNc_ n<M
if (a < b) { ?yeC j1X
data[k] = temp[i++]; U(LR('-h
a = temp; <X&:tZ#/
} else { L([>yQZ
data[k] = temp[j--]; ''Ec-b6Q-
b = temp[j]; )'|W[Sh?
} !Qa7-
} Ayt!a+J
} NX_S
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/** _cN)q
* @param data v("vUqhx2+
* @param l v 8a
* @param i F|{?GV%hF
*/ LfM(DK
private void insertSort(int[] data, int start, int len) { l #z`4<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |T&#"q,i9%
} ^BTNx2VHf
} /loNOutw
} bA,D]
} ofCP>Z-
%'O(Y{$Y.
堆排序： EA#!h'-s
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package org.rut.util.algorithm.support; {z_pL^S'52
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import org.rut.util.algorithm.SortUtil; dL)5~V8s
XX6)(
/** Ve) :I
* @author treeroot '#6DI"vJ
* @since 2006-2-2 R~-q!nC
* @version 1.0 vb!KuI!:p
*/ '8 #*U
public class HeapSort implements SortUtil.Sort{ ohk =7d.'
U6PUt'Kk@
/* (non-Javadoc) DR8dJ#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J?$uNlI
*/ ,#Y".23G
public void sort(int[] data) { SUhP e+
MaxHeap h=new MaxHeap(); b1!%xdy_T
h.init(data); s:P-F0q!&
for(int i=0;i h.remove(); Kn|dnq|G
System.arraycopy(h.queue,1,data,0,data.length); wE2?/wb
} 0AenDm@9
-+/|
private static class MaxHeap{ g'E^@1{
PeaD]
void init(int[] data){ 4R6 .GO
this.queue=new int[data.length+1]; |lY8u~%
for(int i=0;i queue[++size]=data; 9,+LNZ'k
fixUp(size); m^KkS
} u}_q'=<\
} :;QLoZh^
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private int size=0; l[Oxf|
z)Gr`SA<
private int[] queue; 3:S"!F
=6:Iv"<
public int get() { cvt2P}ma#
return queue[1]; T^W8_rm*3
} :+n7oOV
u#QQCgrs
public void remove() { S7R^%Wck/6
SortUtil.swap(queue,1,size--); 2J$Uz,@
fixDown(1); V-57BKeDz
} @VFg XN
file://fixdown '_8Vay~
private void fixDown(int k) { Gf>T{Q`,is
int j; ]up:pddIh
while ((j = k << 1) <= size) { )`a R?_
if (j < size %26amp;%26amp; queue[j] j++; NH/H+7,o
if (queue[k]>queue[j]) file://不用交换 m`t7-kiZ
break; BDA\9m^3
SortUtil.swap(queue,j,k); [z?XVl<
k = j; -J:vYhq|g
} Qw ED>G|
} gi8kYHldH
private void fixUp(int k) { m-K6y7t
while (k > 1) { {^v50d
int j = k >> 1; f|EWu
if (queue[j]>queue[k]) b^ZrevM
break; f7L|Jc
SortUtil.swap(queue,j,k); #t\Oq9}^
k = j; ~lMsD~$sO
} %PQC9{hUy$
} Y,9("'bo
8K$:9+OY
} cCwT0O#d
p 7sYgz
} 8Og9P1jVh
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SortUtil： V%+KJ}S!Z
p?%G|Q
package org.rut.util.algorithm; YVzK$k'3U
6@ + >UZr\
import org.rut.util.algorithm.support.BubbleSort; TE/2}XG)
import org.rut.util.algorithm.support.HeapSort; x;N?'"GP
import org.rut.util.algorithm.support.ImprovedMergeSort; SFuzH)+VO
import org.rut.util.algorithm.support.ImprovedQuickSort; /OZF3Pft
import org.rut.util.algorithm.support.InsertSort; Z)HQlm
import org.rut.util.algorithm.support.MergeSort; _)ERi*}x8
import org.rut.util.algorithm.support.QuickSort; TJCoID7a8
import org.rut.util.algorithm.support.SelectionSort; \K?3LtJ
import org.rut.util.algorithm.support.ShellSort; lA{Sr0fTP
c=7L)w:I
/** ,Ti#g8j
* @author treeroot \aG>(Mr
* @since 2006-2-2 "jy'Dpy0m
* @version 1.0 Lz4iLLP
*/ ")TI,a`
public class SortUtil { =U?"#
public final static int INSERT = 1; 6$IAm#
public final static int BUBBLE = 2; \wMr[_LW
public final static int SELECTION = 3; >%xJ e'
public final static int SHELL = 4; g5H+2lSC
public final static int QUICK = 5; b-wFnMXk+
public final static int IMPROVED_QUICK = 6; #T+%$q [:
public final static int MERGE = 7; ~$+9L2gz
public final static int IMPROVED_MERGE = 8; 1Azigd0%
public final static int HEAP = 9; (CEJg|,
)wAqaG_d
public static void sort(int[] data) { &B[$l`1
sort(data, IMPROVED_QUICK); ,Xao{o(
} T*z >A
private static String[] name={ ,1od]]>(O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @>JO &,od
}; \4mw>8wA
7j5l?K-
private static Sort[] impl=new Sort[]{ d!8`}L:=M
new InsertSort(), .0nL;o
new BubbleSort(), 'AHI;Z~Gk
new SelectionSort(), ,xNuc$8Jd
new ShellSort(), J-hP4t&x
new QuickSort(), HA>b'lqBM
new ImprovedQuickSort(), {3'z}q
new MergeSort(), :FB#,AOa_
new ImprovedMergeSort(), 1)vdM(y3j
new HeapSort() +:;r} 7Zh
}; !|hv49!H
MWu67">"
public static String toString(int algorithm){ pGh2 4E
return name[algorithm-1]; byoDGUv
} nUD)G<v
|lrLTI^a
public static void sort(int[] data, int algorithm) { W& w-yZ
impl[algorithm-1].sort(data); * 3WK`9q
} R6*:Us0\FJ
Z25^+)uf*U
public static interface Sort { z`]'~
public void sort(int[] data); 6MqJy6
} Rcfh*"k
kTt;3Ia
public static void swap(int[] data, int i, int j) { TIYI\/a\;
int temp = data; P'xq+Q
data = data[j]; XzIhFX6
data[j] = temp; 7'k+/rAO
} #/\5a;Elc
} QG$LbuZ`