[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; Usx8 U
} xrs?"]M[
int i1=l; 9LI#&\lba
int i2=mid+1; +mIO*UQi
for(int cur=l;cur<=r;cur++){ zW+X5yK
if(i1==mid+1) m0DD|7}+
data[cur]=temp[i2++]; GWsvN&nr
else if(i2>r) ycz6-kEp
data[cur]=temp[i1++]; d="Oge8
else if(temp[i1] data[cur]=temp[i1++]; Dp3&@M"^yY
else <lopk('7
data[cur]=temp[i2++]; ~oWCTj-
} }6*+>?
} o$)pJ#";F
7o_1PwKS6
} j^-E,YMC
mnh>gl!l
改进后的归并排序: >4 4A
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package org.rut.util.algorithm.support; ?%-VSL>$w=
P MV;A{T
import org.rut.util.algorithm.SortUtil; .fY1?$*6c
[#hpWNez(>
/** NCR4n_
* @author treeroot 7Ko<,Kp2b
* @since 2006-2-2 gG*]|>M JI
* @version 1.0 +i HZ*
*/ z~fZg6
public class ImprovedMergeSort implements SortUtil.Sort { TwJiYXHw?
C,r[H5G#
private static final int THRESHOLD = 10; a|?&
Jh`Pq,B:
/* dCc"Qr[k
* (non-Javadoc) ur7sf$
* ?-C=_eZJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g?&_5)&
*/ =;Ap+}
public void sort(int[] data) { gT8Q:8f:
int[] temp=new int[data.length]; z=%&?V
mergeSort(data,temp,0,data.length-1); *'[8FZ|dQ
} {BPNb{dBKr
OCHjQc
private void mergeSort(int[] data, int[] temp, int l, int r) { Lu?MRF f
int i, j, k; }x!=F<Q!r
int mid = (l + r) / 2; ]z3!hgTj
if (l == r) Ck.LsL-
return; WRrCrXP
if ((mid - l) >= THRESHOLD) s2F<H#
mergeSort(data, temp, l, mid); %:Mi6sR|
else y.vYT{^
insertSort(data, l, mid - l + 1); M~/7thP{
if ((r - mid) > THRESHOLD) R<(kiD\?]
mergeSort(data, temp, mid + 1, r); i82sMN1jl7
else E0HXB1"
insertSort(data, mid + 1, r - mid); }9=X*'BO
oE/g)m%
for (i = l; i <= mid; i++) { <5@VFRjc
temp = data; 8G3CQ]G
} RBuerap
for (j = 1; j <= r - mid; j++) { ]+4QsoFNt
temp[r - j + 1] = data[j + mid]; VgGMlDl
} 0APh=Alq
int a = temp[l]; p6S{OUiG
int b = temp[r]; |y%pJdPk=
for (i = l, j = r, k = l; k <= r; k++) { W3Gg<!*Uo
if (a < b) { zy8Z68%E`*
data[k] = temp[i++]; fL$U%I3
a = temp; 8`g@ )]Iy
} else { w1;:B%!H
data[k] = temp[j--]; *~Y$8!ad
b = temp[j]; z3-A2#c
} j}s<Pn%4
} : ;l9to
} yBKEw(1
s|HpN
/** ~V34j:
* @param data _L8|ZV./
* @param l z3Id8G&>
* @param i =#=<%HPT
*/ y-#{v.|L
private void insertSort(int[] data, int start, int len) { k]>1@t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); WzinEo{f
} "R<c
} 4C:-1gu7
} l7T@<V
} j(xVbUa
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堆排序： I}^Q u0ub
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package org.rut.util.algorithm.support; xgp 6lO[
etw.l~y
import org.rut.util.algorithm.SortUtil; ~W/|RP7S
3[{RH*nHD
/** wqnrN6$jf
* @author treeroot eeMeV>
* @since 2006-2-2 \:mZ)f3K=
* @version 1.0 wn1` 9
*/ qX9x#92
public class HeapSort implements SortUtil.Sort{ ~SzHIVj:6
iVaCXXf'
/* (non-Javadoc) {u}d`%_.M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =# /BCL7
*/ u=QG%O#B
public void sort(int[] data) { tRtoA5
MaxHeap h=new MaxHeap(); C}'Tmi
h.init(data); {D{' \]+
for(int i=0;i h.remove(); 18eB\4NlD
System.arraycopy(h.queue,1,data,0,data.length); 9B)<7JJX!J
} 0 k(su
e'l@M$^
private static class MaxHeap{ q 3nF\Me0
l/i7<q
void init(int[] data){ D[H #W[
this.queue=new int[data.length+1]; eo [eN.
for(int i=0;i queue[++size]=data; U0m 5Rc
fixUp(size); \8^c"%v,:
} $eu-8E'
} Hd_W5R
j1~'[
private int size=0; 0rrNVaM
R3bHX%T
private int[] queue; H13kNhV9
(O!Q[WLS
public int get() { dje}CbZ
return queue[1]; \+#>XDD
} {t%Jc~p{
fbrCl!%P
public void remove() { `b:yW.#w3l
SortUtil.swap(queue,1,size--); "?HDv WP=w
fixDown(1); "3;b,<0
} 'eYM;\%('
file://fixdown bXNM.K
private void fixDown(int k) { #S|DoeFs
int j; 6%A_PP3Z
while ((j = k << 1) <= size) { X,mqQ7+
if (j < size %26amp;%26amp; queue[j] j++; 4:0y\M5u
if (queue[k]>queue[j]) file://不用交换 Vh}F#~BrI
break; SJ8CBxA
SortUtil.swap(queue,j,k); HU1ZQkf
k = j; bu:%"l
} `JAM]qB"
} X/qLg+X
private void fixUp(int k) { TgjM@ir
while (k > 1) { `^mY*Cb e
int j = k >> 1; BM>'w,$KL
if (queue[j]>queue[k]) dWi:V7t+
break; [/Vi*Z
SortUtil.swap(queue,j,k); oYmLJzCf
k = j; 7#[8td
} *l.tsICmbP
} @,Kl"i;
|*5HNP
} aovw'O\Q
L ]Y6/Q
} Z=.$mFE\
yt[vd8O'c
SortUtil： e.'6q ($3
*Sw1b7l
package org.rut.util.algorithm; jU2vnGw_
MO-7yp:K
import org.rut.util.algorithm.support.BubbleSort; }UzRFIcv
import org.rut.util.algorithm.support.HeapSort; w!--K9
import org.rut.util.algorithm.support.ImprovedMergeSort; :406Oa
import org.rut.util.algorithm.support.ImprovedQuickSort; SCL8.%z D
import org.rut.util.algorithm.support.InsertSort; /v-:ca)7mI
import org.rut.util.algorithm.support.MergeSort; &|YJ?},
import org.rut.util.algorithm.support.QuickSort; y!u=]BE
import org.rut.util.algorithm.support.SelectionSort; FQe82tfV+
import org.rut.util.algorithm.support.ShellSort; ;6655C
~cH3RFV
/** 5DS'22GW`
* @author treeroot htu(R$GSM
* @since 2006-2-2 $d\>^Q
* @version 1.0 2H9;4>ss
*/ )WH;G:$&"
public class SortUtil { *-`-P
public final static int INSERT = 1; [BZA1,
public final static int BUBBLE = 2; <x[CL,Zg7
public final static int SELECTION = 3; ]9PQKC2&
public final static int SHELL = 4; Me2qOc^Z-
public final static int QUICK = 5; sL!+&Id|
public final static int IMPROVED_QUICK = 6; yOswqhz
public final static int MERGE = 7; nsN|[E8
public final static int IMPROVED_MERGE = 8; w#^z:7fI
public final static int HEAP = 9; !4mg]~G
<! Z06
public static void sort(int[] data) { %3Tz%>n
sort(data, IMPROVED_QUICK); ;"w?@ELE
} jxqKPMf>@%
private static String[] name={ x%RG>),U
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" uW0Dm#
}; d}^G790
W|CZA
private static Sort[] impl=new Sort[]{ W,fXHYst
new InsertSort(), ?aWMU?S
new BubbleSort(), TGH"OXV*@
new SelectionSort(), )%wNVW 0C
new ShellSort(), Ku`u%5<
new QuickSort(), $(fhO
new ImprovedQuickSort(), .K`EflN
new MergeSort(), wCgi@\
new ImprovedMergeSort(), {'a|$u+
new HeapSort() b Od<x >@
}; FH)_L1n
>K n7A
public static String toString(int algorithm){ &>A<{J@VL
return name[algorithm-1]; i_f\dkol
} 952l1c!
*;:dJXR
public static void sort(int[] data, int algorithm) { oM(8'{S=
impl[algorithm-1].sort(data); }l7@:ezZZ7
} /i)>|U 4
N~|Z@pU"
public static interface Sort { X" Upml
public void sort(int[] data); mlix^P
} c^1tXu|&
$*+IsP!
public static void swap(int[] data, int i, int j) { sc&u NfJ
int temp = data; X'J!.Jj
data = data[j]; 6~^ M<E
data[j] = temp; |*(R$tX
} MqjdW
} VT [TE