[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; kjXwVGK=P<
} NJ;m&Tm,DF
int i1=l; 0F%?<: &
int i2=mid+1; I7#JT?\}
for(int cur=l;cur<=r;cur++){ ]Zc\si3i&
if(i1==mid+1) ,}9 tJY@E
data[cur]=temp[i2++]; rhly.f7N=A
else if(i2>r) 'tU\~3k
data[cur]=temp[i1++]; A5]yC\*zt
else if(temp[i1] data[cur]=temp[i1++]; a`?Vc}&
else *O\lR-z!k
data[cur]=temp[i2++]; x3.,zfWs
} /FC(d5I
} 1'8-+?r
Z%=A[`5]
} W5~!)Ec
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改进后的归并排序: j |o&T41
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package org.rut.util.algorithm.support; e~cg (.
FN (O
import org.rut.util.algorithm.SortUtil; ;qr?[{G
Ww#!-,*]o
/** 4x@W]*i
* @author treeroot 2"%f:?xV{
* @since 2006-2-2 9]1LwX!M2
* @version 1.0 v(Sh+p
*/ iun_z$I<+Z
public class ImprovedMergeSort implements SortUtil.Sort { 'op_GW
2iOYC0`!
private static final int THRESHOLD = 10; tDfHO1pS
Q0,eE:
/* I:YgKs)[
* (non-Javadoc) D,(:))DmR
* ,ei=w,O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T7O)
*/ %=\*OIhl
public void sort(int[] data) { e$JATA:j
int[] temp=new int[data.length]; w*o2lg9
mergeSort(data,temp,0,data.length-1); !- 5z 1b)
} 4mpcI
N%1nii
private void mergeSort(int[] data, int[] temp, int l, int r) { m| 7v76(
int i, j, k; oJ/=&c
int mid = (l + r) / 2; .WuSW[g
if (l == r) v-Q>I5D;:
return; $+Z2q<UT
if ((mid - l) >= THRESHOLD) )e6sg]#
mergeSort(data, temp, l, mid); *~b~y7C
else ,068IEs
insertSort(data, l, mid - l + 1); +ef>ek
if ((r - mid) > THRESHOLD) nNnfcA&W
mergeSort(data, temp, mid + 1, r); =En1?3?
else uK1VFW
insertSort(data, mid + 1, r - mid); a3a:H
q(1hY"S"}b
for (i = l; i <= mid; i++) { ~C3Ada@4
temp = data; mQ:YHtHE.F
} a$bE2'cb
for (j = 1; j <= r - mid; j++) { ,]das
temp[r - j + 1] = data[j + mid]; _Vt(Eg_\
} I9`ZK2S
int a = temp[l]; \g)?7>M|
int b = temp[r]; :m/qR74+"
for (i = l, j = r, k = l; k <= r; k++) { eIN0T;1T
if (a < b) { P7l3ZH( g
data[k] = temp[i++]; @,]W
a = temp; I{.t-3hp
} else { HW#@e kh
data[k] = temp[j--]; L 7LUy$M-<
b = temp[j]; :C,}DyZy
} 'Z#>K*
} zG^$-L.n
} 4%JJ}{Ff
UQ@szE
/** &0J8ICd=
* @param data 3v`@**
* @param l \YF07L]qs-
* @param i ,^eOwWV
*/ U%;E:|
private void insertSort(int[] data, int start, int len) { A* Pz-z>z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); D*sL&Rt][Y
} nHp$5|r<
} |Z+qaq{X
} r>CBp$
} aMJ2bu
Xh/BVg7$
堆排序： \pSRG=`
x(~V7L>"i
package org.rut.util.algorithm.support; :()K2<E
OIjG`~Rx
import org.rut.util.algorithm.SortUtil; DNyt_5j&:
:2:%
/** C#3&,G W
* @author treeroot 0V`~z-#
* @since 2006-2-2 6k<3,`VV|
* @version 1.0 x;LO{S4Z
*/ b5f+q:?{
public class HeapSort implements SortUtil.Sort{ -mLu!32I<
@3FQMs4
/* (non-Javadoc) LW">9;n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?wn<F}UH
*/ :7(d6gEL
public void sort(int[] data) { ?Jgqb3+!o
MaxHeap h=new MaxHeap(); NJOV!\k
h.init(data); 6KPjZC<
for(int i=0;i h.remove(); TB84}
System.arraycopy(h.queue,1,data,0,data.length); (|3?wX'2U
} B8!$?1*^a
R"\(a
private static class MaxHeap{ dX[Xe
;4Xx5*E
void init(int[] data){ zN-Y=-c
this.queue=new int[data.length+1]; mS0;2xU
for(int i=0;i queue[++size]=data; bBGg4{
fixUp(size); lEb H4 g
} $~?)E;S
} ^v:XON<
nB5^
private int size=0; n0%S: (
3x z z* <
private int[] queue; `1y@c"t
|It{L0=U
public int get() { 4! F$nmG)
return queue[1]; V!e*J,g
} #$!^1yO
?g0dr?H
public void remove() { {Hvkn{{'
SortUtil.swap(queue,1,size--); ]+tO
fixDown(1); VMNdC}
} Y$+v "
file://fixdown O~6AX)|&=
private void fixDown(int k) { qQ,(O5$|
int j; dwiLu&]u
while ((j = k << 1) <= size) { vVsaGW
if (j < size %26amp;%26amp; queue[j] j++; =eh!eZ9
if (queue[k]>queue[j]) file://不用交换 k RSY;V
break; U<'z,Px6
SortUtil.swap(queue,j,k); IA}.{zY~|
k = j; Kf)$/W4
} 3Gw*K-.
} C/ ]Bx
private void fixUp(int k) { .cmhi3o4
while (k > 1) { 2(Yt`3Go(
int j = k >> 1; !MmbwB'
if (queue[j]>queue[k]) A-$C6q
break; ^?0?*
SortUtil.swap(queue,j,k); %(s2{$3
k = j; ma"M?aM
} A v;NQt8ut
} 1 7iw`@
Y'R/|:YL@
} +j$nbU0U
k9VWyq__
} 2j1HN
\rS-}DG
SortUtil： m+ #G*
aFh'KPhe
package org.rut.util.algorithm; G,(Xz"`,
i"E_nN"V
import org.rut.util.algorithm.support.BubbleSort; {~w!
import org.rut.util.algorithm.support.HeapSort; xZloEfv.B
import org.rut.util.algorithm.support.ImprovedMergeSort; KQ(S\
import org.rut.util.algorithm.support.ImprovedQuickSort; X[?E{[@Z
import org.rut.util.algorithm.support.InsertSort; ?4Rq +
import org.rut.util.algorithm.support.MergeSort; vJ&35nF&
import org.rut.util.algorithm.support.QuickSort; \oP
import org.rut.util.algorithm.support.SelectionSort; 1Eryw~,,9i
import org.rut.util.algorithm.support.ShellSort; qa6HwlC1
n~i^+pD@
/** a"k,x-EL(
* @author treeroot a@?ebCE
* @since 2006-2-2 -YipPo"a
* @version 1.0 V@1,((,l
*/ ye| 2gH
public class SortUtil { %fh-x(4v
public final static int INSERT = 1; 5yroi@KT
public final static int BUBBLE = 2; (YYwn@NGj
public final static int SELECTION = 3; 1Va@w
public final static int SHELL = 4; 4!?4Tc!X
public final static int QUICK = 5; /[q_f
public final static int IMPROVED_QUICK = 6; +bWo{
public final static int MERGE = 7; b}hQU~,E
public final static int IMPROVED_MERGE = 8; 2D3mTpw
public final static int HEAP = 9; Ka"1gbJ|
9HlM0qE5b
public static void sort(int[] data) { M IUB]
sort(data, IMPROVED_QUICK); ;;EFiaA
} owO&[D/
private static String[] name={ |%(qaPA1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x\G<R; Q
}; j?!/#'
XKT[8o<L
private static Sort[] impl=new Sort[]{ )_Iu7b
new InsertSort(), 9a'}j#mJo
new BubbleSort(), $^#q0Yx
new SelectionSort(), uU+?:C
new ShellSort(), !B#tJD
new QuickSort(), UXHtmi|_:
new ImprovedQuickSort(), P;ZVv{mT
new MergeSort(), Vz y )jf
new ImprovedMergeSort(), i6^-fl
new HeapSort() o;pJjC]
}; hCj8y.X|E(
mWVq>~
public static String toString(int algorithm){ )Qo^Mz
return name[algorithm-1]; }9+Vf'u|l
} }jNVR#D:
.WGrzhsV
public static void sort(int[] data, int algorithm) { ]pVuRj'pP
impl[algorithm-1].sort(data); j7VaaA
} q6P5:@
D:N\K/p
public static interface Sort { pEb/yIT"
public void sort(int[] data); T<mP.T,$!
} *o=( w5
M7(]NQ\TQ
public static void swap(int[] data, int i, int j) { Lcs?2c:%
int temp = data; cvV8;
data = data[j]; g}I{-
data[j] = temp; m khp@^5
} ,u.A[{@py
} !\q'{x5C