[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; .1%i`+uZ
} @+Pf[J41
int i1=l; I$F\(]"@
int i2=mid+1; 5\5~L
for(int cur=l;cur<=r;cur++){ o+R. u}|
if(i1==mid+1) 1dXh\r_n
data[cur]=temp[i2++]; 9`E-dr9
else if(i2>r) 1URT2$2p
data[cur]=temp[i1++]; E'fX&[
else if(temp[i1] data[cur]=temp[i1++]; @)06\h
else ]#+5)[N$>
data[cur]=temp[i2++]; ;S{ZC5
} q w"e0q%)
} G+;g:_E=
@D2`*C9
} -1#e^9Ve\
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改进后的归并排序: Wa@6VY
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package org.rut.util.algorithm.support; *E$H;wKs8
&AN%QhI
import org.rut.util.algorithm.SortUtil; l'P[5'.
Y~<rQ
/** b<48#Qy~l
* @author treeroot ,\Z8*Jr3Q
* @since 2006-2-2 Lp~c
* @version 1.0 Y&~5k;>'_
*/ mn,=V[f
public class ImprovedMergeSort implements SortUtil.Sort { #`2GAM];7
7Ljs4>%l9j
private static final int THRESHOLD = 10; chMt5L+5
69[w/\
/* =]6_{#Z<
* (non-Javadoc) D_]i/ F%
* vs*_;vx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %Tk}sfx
*/ I*%&)Hj~
public void sort(int[] data) { gDgP;id
int[] temp=new int[data.length]; (}~ 1{C@
mergeSort(data,temp,0,data.length-1); P2s^=J0@
} &fh.w]\
Q2??Kp]1
private void mergeSort(int[] data, int[] temp, int l, int r) { {"Y]/6
int i, j, k; <%T%NjNPQ
int mid = (l + r) / 2; tauP1&%oH{
if (l == r) mOgx&ns;j
return; N}e(.
if ((mid - l) >= THRESHOLD) <PH3gyC
mergeSort(data, temp, l, mid); W\zL
else `V$cz88b
insertSort(data, l, mid - l + 1); ZhxfI?i)l
if ((r - mid) > THRESHOLD) =rE`ib
mergeSort(data, temp, mid + 1, r); 0`zm>fh}
else JB:mbH
insertSort(data, mid + 1, r - mid); bt.K<Y0
!!\4'Q[
for (i = l; i <= mid; i++) { B]CS2LEqh
temp = data; o%QhV6(F
} ,5%aP%
for (j = 1; j <= r - mid; j++) { V1AEjh
temp[r - j + 1] = data[j + mid]; 4{1c7g
} GZ-n! ^
int a = temp[l]; ]&; G\9$y
int b = temp[r]; (*c`<|)
for (i = l, j = r, k = l; k <= r; k++) { -#:Y+"'
if (a < b) { !^Qb[ev
data[k] = temp[i++]; |O #wdnYW
a = temp; !)=#p9
} else { \ltErd-
data[k] = temp[j--]; L.R\]+$U2
b = temp[j]; k,o=1I
} H>Iet}/c
} w96j,rEC
} S@l a.0HDA
&St~!y6M?
/** ueS[sN!
* @param data U{.+*e18
* @param l 'R-JQE-]
* @param i #m[w=Pu}
*/ ?Ix'2v
private void insertSort(int[] data, int start, int len) { (>kBmK1Aj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); '3Y0D1`v
} 'bQs_
} ;nHo%`Zt
} _dB0rsCnU%
} 3L\s8O
O=9VX
堆排序： p>w~T#17
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package org.rut.util.algorithm.support; cfQh
}r\SP3
import org.rut.util.algorithm.SortUtil; ,T1XX2?:
Z{|.xgsY
/** N1B$G
* @author treeroot [0%Gu5_\
* @since 2006-2-2 p'9 V._h
* @version 1.0 eo}S01bt
*/ Q?I"J$]&L
public class HeapSort implements SortUtil.Sort{ ADJ5ZD<Q
8Y;zs7Y
/* (non-Javadoc) Iu)(Huv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =QO1FO
*/ 2*UE&Gp
public void sort(int[] data) { fQ?n(
MaxHeap h=new MaxHeap(); n?KS]ar>
h.init(data); _tR.RAaa"
for(int i=0;i h.remove(); 4jZi62
System.arraycopy(h.queue,1,data,0,data.length); jd*%.FDi{
} PxCl]~v
oW\7q{l2)
private static class MaxHeap{ ;zxlwdfcr'
E.Gh@i
void init(int[] data){ eG2qOq$[
this.queue=new int[data.length+1]; >8{`q!=|~
for(int i=0;i queue[++size]=data; XiZ Zo
fixUp(size); 2+G:04eS,e
} He$mu=$q{
} hU)f(L
l$bmO{8uG
private int size=0; NiQc2\4%
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private int[] queue; xF:poi
zI*/u)48
public int get() { K]=>F
return queue[1]; wW)&Px n
} `peJ s~V
IUBps0.T\
public void remove() { r~BQy'
SortUtil.swap(queue,1,size--); a[{QlD^D
fixDown(1); 7>e~i,
} Y=wP3q
file://fixdown @_weMz8}
private void fixDown(int k) { yK2*~T,6@
int j; -QNMB4
while ((j = k << 1) <= size) { :e9jK[)h0
if (j < size %26amp;%26amp; queue[j] j++; 8T1DcA*
if (queue[k]>queue[j]) file://不用交换 A?Hjz%EcW
break; Wx\"wlJ7.3
SortUtil.swap(queue,j,k); x /Ky: Ky
k = j; G cLp"
} TB3T:A>2
} 9j>sRE1
private void fixUp(int k) { )9W#5V$
while (k > 1) { ~uD;_Y=u)r
int j = k >> 1; (NWN&
if (queue[j]>queue[k]) !NY^(^
break; &oEq&
SortUtil.swap(queue,j,k); i:Ct6[
k = j; ?lw[
} @p'v.;~#
} D+U/]sW
\?ws0Ax
} X52jqXjg
4lKbw4[a
} J5_ qqD)
&CP@] pi9L
SortUtil： .g`*cDW^=
:phD?\!w8t
package org.rut.util.algorithm; eR 2T<7G
JFk|Uqs(
import org.rut.util.algorithm.support.BubbleSort; _q 9lr8hx
import org.rut.util.algorithm.support.HeapSort; )p_LkX(
import org.rut.util.algorithm.support.ImprovedMergeSort; ^~IcQ!j/5
import org.rut.util.algorithm.support.ImprovedQuickSort; E@}j}/%'O
import org.rut.util.algorithm.support.InsertSort; l8d%hQVqT
import org.rut.util.algorithm.support.MergeSort; <TROs!x$a
import org.rut.util.algorithm.support.QuickSort; Da[X HUk
import org.rut.util.algorithm.support.SelectionSort; L$kAe1 V^m
import org.rut.util.algorithm.support.ShellSort; <!nWiwv
->25$5#
/** XGl13@=O
* @author treeroot 8'\,&f`Y
* @since 2006-2-2 x$b[m20
* @version 1.0 nR'EuI~(}
*/ \6 0WP-s
public class SortUtil { ?m7"G)
public final static int INSERT = 1; FG36,6N%2j
public final static int BUBBLE = 2; xla^A}{
public final static int SELECTION = 3; 9}Ave:X^
public final static int SHELL = 4; {3uSg)
public final static int QUICK = 5; Wjk;"_"gd
public final static int IMPROVED_QUICK = 6; iOXP\:mPo
public final static int MERGE = 7; 64j 4P 7
public final static int IMPROVED_MERGE = 8; A;nmua-Fv
public final static int HEAP = 9; #i=^WN<V
$I]x &cF
public static void sort(int[] data) { 8GZjIW*0oq
sort(data, IMPROVED_QUICK); bh"v{V`=0
} D&d:>.~u
private static String[] name={ snNg:rTL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4<>:]
}; '>3RZ&O
zLK ~i>aW
private static Sort[] impl=new Sort[]{ ~\IDg/9Cj
new InsertSort(), aC]l({-0
new BubbleSort(), ")gCA:1-
new SelectionSort(), 3E@&wpj
new ShellSort(), 3Qr!?=nf
new QuickSort(), &rWJg6/
new ImprovedQuickSort(), EUS]Se2
new MergeSort(), Y9ce"*b
new ImprovedMergeSort(), sO-R+G/^7
new HeapSort() Kd1\D!#!6
}; %,q#f#
Cx'=2Y7
public static String toString(int algorithm){ ur[bh
return name[algorithm-1]; H)fo4N4ii
} ul&7hHp_u%
P(+ar#,G
public static void sort(int[] data, int algorithm) { x=+I8Q4:
impl[algorithm-1].sort(data); K'/x9.'%
} F5q1VEe
OHvzK8
public static interface Sort { ?0&>?-?
public void sort(int[] data); rzj'!~>U
} kYa' ] m
HliY
public static void swap(int[] data, int i, int j) { =gyK*F(RK
int temp = data; 5h7DVr!
data = data[j]; bu5)~|?{t
data[j] = temp; #7"5Y_0-
} ] CE2/6Ph
} mW9b~G3k