[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; xe"4u JO
} f)p>nW?Z
int i1=l; c13vEn!c
int i2=mid+1; C.b,]7i
for(int cur=l;cur<=r;cur++){ Tb5$
if(i1==mid+1) x&Q+|b%
data[cur]=temp[i2++]; Z[DetRc-
else if(i2>r) rC* sNy2
data[cur]=temp[i1++]; $]Q*E4(kV9
else if(temp[i1] data[cur]=temp[i1++]; .rt8]%
else "#_)G7W+e
data[cur]=temp[i2++]; jh<TdvF2$
} qAS70XjOF
} /k4^&
OpWC2t)
} 34/]m/2NZK
lBizC5t!o
改进后的归并排序: (=S"Kvb~#
7,) 67G;
package org.rut.util.algorithm.support; )*psDjZ7*
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import org.rut.util.algorithm.SortUtil; qcR|E`k-G
t~+{Hr) #y
/** = ]dz1~/
* @author treeroot Q#yu(
* @since 2006-2-2 BK`Q)[
* @version 1.0 0~PXa(!^K
*/ I?^Q084
public class ImprovedMergeSort implements SortUtil.Sort { Uxj<x`<1x
%J/fg<W1
private static final int THRESHOLD = 10; "z{_hp{T^
^g}gT-l%
/* =8$(i[;6w
* (non-Javadoc) gQ[]
* 97:t29N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Fy4<
*/ D[>XwL
public void sort(int[] data) { IS5.i95m
int[] temp=new int[data.length]; b@{%qh,C
mergeSort(data,temp,0,data.length-1); 2|T|K?R^
} *_2O*{V
(R;) 9I\
private void mergeSort(int[] data, int[] temp, int l, int r) { {UV<=R,E
int i, j, k; 1)P<cNj
int mid = (l + r) / 2; CYTuj>Ww
if (l == r) t5X G^3X@
return; $ g1wK}B3
if ((mid - l) >= THRESHOLD) N+C%Z[gt[
mergeSort(data, temp, l, mid); >Rl0%!
else O]$*EiO\
insertSort(data, l, mid - l + 1); Et@=Ic^E
if ((r - mid) > THRESHOLD) rA1zyZlz
mergeSort(data, temp, mid + 1, r); ^5FJ}MMJf
else ,Do$`yO+
insertSort(data, mid + 1, r - mid); 2m)kyQ
\ pe[V~F
for (i = l; i <= mid; i++) { 36x5q 1
temp = data; .dg 4gr\D
} xy-$v
for (j = 1; j <= r - mid; j++) { #G[ *2h~99
temp[r - j + 1] = data[j + mid]; )DklOEO
} pR@GvweA
int a = temp[l]; <manv8*6
int b = temp[r]; [+:mt</HN
for (i = l, j = r, k = l; k <= r; k++) { 3;t@KuQ66
if (a < b) { Q)%8NVs
data[k] = temp[i++]; #LrCx"_&
a = temp; %(dV|,|v
} else { }K#&5E
data[k] = temp[j--]; Y_Z &p#Q!
b = temp[j]; P&-D0T_
} @]y{M;
} 8IT_mjj
} D 7;~x]*
@y;tk$e
/** @=MZ6q
* @param data 6>LQGO
* @param l Chb4VoE
* @param i D@lAT#vA
*/ y ? {PoNI
private void insertSort(int[] data, int start, int len) { c^dl+-{Mc
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =A6u=
} '^.=gTk
} _>_y@-b
} 0N3tsIm>
} KOAz-h@6
XCqfAcNQ
堆排序： =xlYQ}-(a
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package org.rut.util.algorithm.support; S8W_$=4
DoCQFSL
import org.rut.util.algorithm.SortUtil; dZ]\1""#H
^$&"<
/** c@ZkX]g
* @author treeroot 1TD&&EC
* @since 2006-2-2 i-"h"nF"
* @version 1.0 gne#v
*/ yw3U"/yw
public class HeapSort implements SortUtil.Sort{ tUAY]BJ*s
T0np<l]A
/* (non-Javadoc) w'!}(Z5X?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [r~rIb%Zj
*/ \3y=0
public void sort(int[] data) { No92Y^~/
MaxHeap h=new MaxHeap(); OL mBh3&
h.init(data); ;hfG${l;
for(int i=0;i h.remove(); |+4E 8;4_
System.arraycopy(h.queue,1,data,0,data.length); ~A:;?A'.
} b$`4Nn|
<+i`W7
private static class MaxHeap{ g:HbmXOBpj
tWX+\ |
void init(int[] data){ 2AdHj&XE
this.queue=new int[data.length+1]; )l!&i?h%
for(int i=0;i queue[++size]=data; J1y2Qw$G
fixUp(size); 9OJ\n|,(
} y 4,T
} s$nfY.C
I!0$% ]F
private int size=0; yQA"T?
enD C#
private int[] queue; DRBYH(
i]^*J1a
public int get() { :R|2z`b!
return queue[1]; aY1#K6(y
} I+4qu|0lA
*i]Z=
public void remove() { E/ed0'|m
SortUtil.swap(queue,1,size--); XGrxzO|{
fixDown(1); Rp@}9qijb
} k f K"i
file://fixdown )>A%FL9
private void fixDown(int k) { 0 *Yivx6
int j; C6T 9
while ((j = k << 1) <= size) { Om?:X!l"
if (j < size %26amp;%26amp; queue[j] j++; 0,D9\ Ebd
if (queue[k]>queue[j]) file://不用交换 @}rfY9o'
break; dU04/]modD
SortUtil.swap(queue,j,k); {*]=qSz
k = j; '?!<I
} &MGgO\|6
} Z`1o#yZ
private void fixUp(int k) { A`8}J4
while (k > 1) { ~zOU/8n ,F
int j = k >> 1; o'}Z!@h
if (queue[j]>queue[k]) qI%9MI;BV
break; QX~72X=(
SortUtil.swap(queue,j,k); Hd@T8 D*A
k = j; <wGTs6
} XkfUPbU
} BxN#Nk~
[?r\b
} eEds-&_
WE8L?55_Au
} t-ReT_D|;
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SortUtil： vR.6^q
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package org.rut.util.algorithm; Fb4S/_ V
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import org.rut.util.algorithm.support.BubbleSort; oIR%{`3"I
import org.rut.util.algorithm.support.HeapSort; x:wq"X
import org.rut.util.algorithm.support.ImprovedMergeSort; 1XKIK(l
import org.rut.util.algorithm.support.ImprovedQuickSort; Z.Y8z#[xg
import org.rut.util.algorithm.support.InsertSort; Zo6a_`)d
import org.rut.util.algorithm.support.MergeSort; ^J=txsx
import org.rut.util.algorithm.support.QuickSort; _f2iz4
import org.rut.util.algorithm.support.SelectionSort; 1~iBzPU2
import org.rut.util.algorithm.support.ShellSort; /SM#hwFxJ&
&7y1KwfXn
/** WRyv >Y
* @author treeroot 7&U+f:-w
* @since 2006-2-2 E^>7jf09,
* @version 1.0 L$07u{Q
*/ Vblf6qaBs
public class SortUtil { 5suSR;8
public final static int INSERT = 1; hdDI%3vk3
public final static int BUBBLE = 2; a+Qj[pS
public final static int SELECTION = 3; pDS4_u
public final static int SHELL = 4; gGz_t,=
public final static int QUICK = 5; M]:B: ;
public final static int IMPROVED_QUICK = 6; sy#j+gZ
public final static int MERGE = 7; L1w4WFWO
public final static int IMPROVED_MERGE = 8; o\YdL2:X
public final static int HEAP = 9; *} 4;1OVT
]tV{#iIJ*
public static void sort(int[] data) { *xNjhR]7v
sort(data, IMPROVED_QUICK); HDG"a&$
} FQ&VM6_
private static String[] name={ SxQDqoA~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;@\JscNJ|
}; x~,?Zj)n?C
*m Tc4&*
private static Sort[] impl=new Sort[]{ R}mWHB_h"
new InsertSort(), UVRV7^eTe
new BubbleSort(), 7`n8 OR4
new SelectionSort(), `)_FO]m}jS
new ShellSort(), 24k}~"We
new QuickSort(), p+1B6j
new ImprovedQuickSort(), H0Xda.Y(
new MergeSort(), pNme jz:
new ImprovedMergeSort(), E$fy*enON
new HeapSort() R1%T>2"~&
}; !f[N&se
3JO:n6
public static String toString(int algorithm){ B ~bU7.Cd
return name[algorithm-1]; ?4dd|n
} &%51jM<
A)0m~+?{J
public static void sort(int[] data, int algorithm) { 'n`$c{N<tM
impl[algorithm-1].sort(data); , Vr6
} w0OK.fj
lcLxqnv
public static interface Sort { m/c~2?-;
public void sort(int[] data); T>?1+mruM
} 5%$kAJZC-
<t2?Oii;
public static void swap(int[] data, int i, int j) { D#(Pg
int temp = data; }=R|iz*,!
data = data[j]; M4]|(A
data[j] = temp; 1Ee>pbd
} C8SNSeg
} l1j