[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; h[b;_>7
} L=nyloz,0
int i1=l; LE%3.. !
int i2=mid+1; 6}ct{Q
for(int cur=l;cur<=r;cur++){ QCIH1\`jW
if(i1==mid+1) DF|(CQs9
data[cur]=temp[i2++]; -.~Dhk
else if(i2>r) S 'S|k7Lp
data[cur]=temp[i1++]; $-H#M]Gq
else if(temp[i1] data[cur]=temp[i1++]; vY&[=2=
else AP&mr1_
data[cur]=temp[i2++]; 'gHa3:US
} I&^B?"Y
} uO8z.
[1K\ _
} _]E H~;
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改进后的归并排序: H3"90^|,@
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package org.rut.util.algorithm.support; _yw]Cacr\
Ea#wtow|-
import org.rut.util.algorithm.SortUtil; th]1> .
ys`"-o[*
/** 99j^<)
* @author treeroot T~@$WM(
* @since 2006-2-2 sDA&U9;
* @version 1.0 .\K0+b;
*/ MwMv[];I
public class ImprovedMergeSort implements SortUtil.Sort { ^}vLZA
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private static final int THRESHOLD = 10; 9aky+
=oz$uD}?
/* tfW*(oU
* (non-Javadoc) Loo48
* c `C /U7j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j#mo Vq
*/ 7<;87t]]
public void sort(int[] data) { N=R|s$,Oy9
int[] temp=new int[data.length]; fgcI55&jV{
mergeSort(data,temp,0,data.length-1); 3m:[o`L
} }{/3yXk[G
OIPJN8V
private void mergeSort(int[] data, int[] temp, int l, int r) { >Z@^R7_W
int i, j, k; F)rU*i7
int mid = (l + r) / 2; ,)-7f|
if (l == r) I,J*\)-%J
return; X/Umfci
if ((mid - l) >= THRESHOLD) l'TM^B)`c
mergeSort(data, temp, l, mid); Al&)8x{p
else O]&DDzo
insertSort(data, l, mid - l + 1); g*t(%;_m
if ((r - mid) > THRESHOLD) iv@ey-,<
mergeSort(data, temp, mid + 1, r); OtK=UtVI
else >(nb8T|
insertSort(data, mid + 1, r - mid); cYHHCaCS
], Xva`"
for (i = l; i <= mid; i++) { 7J?`gl&C
temp = data; }@JPvIE
} y!JZWq%=
for (j = 1; j <= r - mid; j++) { ^PHWUb+``
temp[r - j + 1] = data[j + mid]; Ovu!G q
} [AgS@^"sf5
int a = temp[l]; 6bj.z
int b = temp[r]; Fv_rDTo
for (i = l, j = r, k = l; k <= r; k++) { gYb}<[O!
if (a < b) { -;rr! cQ?
data[k] = temp[i++]; x`:zC#
a = temp; (prqo1e@
} else { :2^j/
data[k] = temp[j--]; 6yZ!K
b = temp[j]; mhTi{t_fHM
} DLMM1 A
} rZ}y'A
} (`%$Aa9J
rm}OVL
/** Qry?h*p+`
* @param data gG5@ KD6k
* @param l ~:8}Bz2!5
* @param i s az<NT
*/ Tp7*T8
private void insertSort(int[] data, int start, int len) { 3@xn<eu
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [wKnJu
} 5~ho1Ud
} p) #7K
} )q#1C]7m*
} g?Jx99c;
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堆排序： `rt?n|*QF
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package org.rut.util.algorithm.support; 9em?2'ysa
y"5>O|`
import org.rut.util.algorithm.SortUtil; w=]id'`?q
yffg_^fR
/** @0js=3!2
* @author treeroot 19V
* @since 2006-2-2 )<Cf,R
* @version 1.0 xz9xt
*/ yCk9Xc
public class HeapSort implements SortUtil.Sort{ _; 7{1n
Ih_2")d
/* (non-Javadoc) ib$_x:OO"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lN@SfM4\
*/ !2]eVO
public void sort(int[] data) { 8#?jYhT7
MaxHeap h=new MaxHeap(); +OGa}9j-
h.init(data); rK^Sn7U
for(int i=0;i h.remove(); ShFC@)<lJ
System.arraycopy(h.queue,1,data,0,data.length); 7;]n+QRfm
} h?UUd\RU)
T&@xgj|!)
private static class MaxHeap{ WKjE^u
d5aG6/
void init(int[] data){ ){'Ef_/R
this.queue=new int[data.length+1]; Z1@E
for(int i=0;i queue[++size]=data; 0M[O(.x
fixUp(size); 70sb{)
} %5) 1^
} ;S,k U{F
{& Pk$Q!
private int size=0; #ZFedK0vv
55aJ=T
private int[] queue; Atdr|2
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public int get() { 5G$sP,n
return queue[1]; QOb+6qy:3
} R<"fcsU
`TugtzRU
public void remove() { V_)G=#6Dy
SortUtil.swap(queue,1,size--); (+M]C]
fixDown(1); }F v:g!
} fgzkc"ReK
file://fixdown UJhmhI
private void fixDown(int k) { ED0Vlw+1
int j; 8oAr<:.=
while ((j = k << 1) <= size) { $>Y2N5
if (j < size %26amp;%26amp; queue[j] j++; l'Oz-p.@
if (queue[k]>queue[j]) file://不用交换 2.xA' \M
break; <oJM||ZA
SortUtil.swap(queue,j,k); R8Kj3wp
k = j; e|6kgj3/
} :[hZn/
} e7T}*Up
private void fixUp(int k) { +`y{r^xD
while (k > 1) { {xW HKsI>,
int j = k >> 1; `,-w+3?Al
if (queue[j]>queue[k]) BYhF?
break; uv&??F]/
SortUtil.swap(queue,j,k); D's Tv}P
k = j; I-L52%E]
} y;'yob
} i.O670D
A>C&`A=-
} _zuaImJ0o
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} . 5cL+G1k#
p,(gv])ie
SortUtil： Nft~UggK
G=1&:nW'
package org.rut.util.algorithm; !c 3c%=W
^`BiA'gPPC
import org.rut.util.algorithm.support.BubbleSort; -'q#u C
import org.rut.util.algorithm.support.HeapSort; 8ClOd<I
import org.rut.util.algorithm.support.ImprovedMergeSort; z' oK 0"
import org.rut.util.algorithm.support.ImprovedQuickSort; O~wZU Zf
import org.rut.util.algorithm.support.InsertSort; pfs'2AFj
import org.rut.util.algorithm.support.MergeSort; -^R6U~
import org.rut.util.algorithm.support.QuickSort; +-s$Htx
import org.rut.util.algorithm.support.SelectionSort; g?TPRr~$9
import org.rut.util.algorithm.support.ShellSort; MXVQ90
pZVT:qFF
/** 6\9 Zc-%
* @author treeroot v--Qbu
* @since 2006-2-2 WNO|ziy
* @version 1.0 1" k_l.\,0
*/ ?.A~O-w
public class SortUtil { HITw{RPrW
public final static int INSERT = 1; }fS`jq;
public final static int BUBBLE = 2; FrKI=8
public final static int SELECTION = 3; ?h$ =]
public final static int SHELL = 4; @Rc/^B:
public final static int QUICK = 5; :!'!V>#g
public final static int IMPROVED_QUICK = 6; ?j'Nx_RoX
public final static int MERGE = 7; Ht{Q=w/9
public final static int IMPROVED_MERGE = 8; <6!;mb ;cX
public final static int HEAP = 9; 6k4ZzQ}
hggP9I:s,
public static void sort(int[] data) { zp4aiMn1F
sort(data, IMPROVED_QUICK); q=,
} ,$H[DX
private static String[] name={ )\`.Ru~,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bjR:5@"
}; Ba8 s
t9U-c5bR
private static Sort[] impl=new Sort[]{ t)p. $
new InsertSort(), \f!j9O9S
new BubbleSort(), 006qj.
new SelectionSort(), k=^~\$e
new ShellSort(), x>ZnQ6x~m]
new QuickSort(), O4+a[82
new ImprovedQuickSort(), =%i~HDiy
new MergeSort(), uQ(C,f[6p
new ImprovedMergeSort(), # $N)
new HeapSort() E"/r*C+T
}; dE_d.[!
]"wl*$N
public static String toString(int algorithm){ 8@)4)+e
return name[algorithm-1]; #;+ABV
} 1ZrJ7a7=
#M)SAe2
public static void sort(int[] data, int algorithm) { 9%^IMUWA
impl[algorithm-1].sort(data); ji&%'h
} ~;QzV?%
q{c/TRp7
public static interface Sort { }hm"49,O
public void sort(int[] data); X2PyFe
} Gg,&~ jHib
mw!EDJ;'
public static void swap(int[] data, int i, int j) { c}-WK*v
int temp = data; EqYBT
data = data[j]; Vm"{m/K0
data[j] = temp; jYxmU8
} B-.QGf8K.
} VoGyjGt&