[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; [-oc>;`=l
} r<Kx0`y
int i1=l; H\tUpan6fy
int i2=mid+1; 9o:Lz5o
for(int cur=l;cur<=r;cur++){ (+y
if(i1==mid+1) >]5P 3\AQV
data[cur]=temp[i2++]; <1\Nb{5
else if(i2>r) *N'p~LJ
data[cur]=temp[i1++]; "d5n \@[t
else if(temp[i1] data[cur]=temp[i1++]; OMg<V
else >_ 2dvg=U
data[cur]=temp[i2++]; /HRFAqep
} n$,*|_$#
} E#t>Qn
=]Jd9]vi
} _Qi&J.U>
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改进后的归并排序: H@8sNV/u
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package org.rut.util.algorithm.support; L"Olwwmk
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import org.rut.util.algorithm.SortUtil; ^iw'^6~
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/** P:]^rke~&
* @author treeroot _?0}<kQ&
* @since 2006-2-2 Ob&<]
* @version 1.0 uw+M
*/ Qe0lBR?H
public class ImprovedMergeSort implements SortUtil.Sort { d-r@E3
1 \6D '/G
private static final int THRESHOLD = 10; KE3;V2Ym f
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/* 0o*8#i/)!3
* (non-Javadoc) 6-B|Y3)B
* ):_\;.L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _1!OlQ
*/ HLaRGN3,
public void sort(int[] data) { (7=!+'T"
int[] temp=new int[data.length]; RxWVe-Dg
mergeSort(data,temp,0,data.length-1); /9pwZ%:<
} !fR3(=oN
+jnJ|h({
private void mergeSort(int[] data, int[] temp, int l, int r) { 3/W'V,5G6
int i, j, k; r{I% \R!@
int mid = (l + r) / 2; {vyv7L
if (l == r) )6,=f.%
return; z]`k#O%%)
if ((mid - l) >= THRESHOLD) HqD^B[jS
mergeSort(data, temp, l, mid); Pax|x15
else MC:@U~}6
insertSort(data, l, mid - l + 1); rJbf_]^
if ((r - mid) > THRESHOLD) =\wxsL
mergeSort(data, temp, mid + 1, r); >!bJslWA
else FOy|F-j
insertSort(data, mid + 1, r - mid); 8=uu8-l8g
x$Oq0d{T
for (i = l; i <= mid; i++) { E3gh?6
temp = data; Tl[!=S
} v4c[(&
for (j = 1; j <= r - mid; j++) { P?B;_W+~A.
temp[r - j + 1] = data[j + mid]; LKOwxF#TKT
} p &"`RS#Z
int a = temp[l]; k=JrLfD4
int b = temp[r]; T1Z;r*}
for (i = l, j = r, k = l; k <= r; k++) { Jx](G>F4f1
if (a < b) { yS(fILV
data[k] = temp[i++]; 8sM|%<$=j
a = temp; sAS:-wp
} else { JJ2_hVU
data[k] = temp[j--]; :hFIl0$,"3
b = temp[j]; 4Vi`* !
} 1A G<$d5U|
} cacr=iX
} %'7lbpy,f
WRyaKM
/** yiC^aY=-
* @param data +&( Mgbna
* @param l dj7hx"BI
* @param i 6GSI"M6s
*/ LzXmb 7A
private void insertSort(int[] data, int start, int len) { %9N7Ln|%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i}mVQ\j5
} ^2on.N q>
} vZ&T}H~8
} iwp{%FF
} +|'c>,?2H
_Wp{[TH
堆排序： nv%rJy*w[
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package org.rut.util.algorithm.support; lG!|{z7+0
p&bROuw<T
import org.rut.util.algorithm.SortUtil; S^>,~R.TX
MLje4
/** >qjq=Ege
* @author treeroot b8"?VS5-"
* @since 2006-2-2 LO khjHR
* @version 1.0 dx&'fe*?
*/ `YLD`(\
public class HeapSort implements SortUtil.Sort{ Yu[ t\/
f~y%%+{p
/* (non-Javadoc) >x+6{^}Q>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o` ZQd,3
*/ Avd ^
public void sort(int[] data) { )d1_Wm#B
MaxHeap h=new MaxHeap(); ,PuL{%PXu
h.init(data); r1.nTO%
for(int i=0;i h.remove(); zHL@i0>^
System.arraycopy(h.queue,1,data,0,data.length); ICs\ z
} PQnF
!^=*Jq>
private static class MaxHeap{ ,dov<U[ia
(-xS?8x$
void init(int[] data){ NI#:|}CYS
this.queue=new int[data.length+1]; ,5kKimTt
for(int i=0;i queue[++size]=data; G!W[8UG
fixUp(size); =K{"{5Wb
} 5eoska#y
} /!Wu D\B
}Q?c"H!/
private int size=0; Hh-+/sO~"
%?uc><&?e
private int[] queue; ;WM"cJo9
$Ifmc`r1
public int get() { -UdEeZz.
return queue[1]; [}/LD3
} u7\J\r4,+
/#-C4"|
public void remove() { R)z4n
SortUtil.swap(queue,1,size--); 7X q,z
fixDown(1); #Jn_c0
} SHbtWq}T
file://fixdown ~\.w^*$#Y
private void fixDown(int k) { ^3{TZ=_;|
int j; N#7QzB9]
while ((j = k << 1) <= size) { #PanfYR
if (j < size %26amp;%26amp; queue[j] j++; lBhLf@
if (queue[k]>queue[j]) file://不用交换 X1Ac*oLN
break; oCi=4#g%7
SortUtil.swap(queue,j,k); *x])Y~oQ
k = j; ?^$MRa:D
} &nkW1Ner9
} OCJnjlV%
private void fixUp(int k) { LbG_z =A
while (k > 1) { J'fQW<T4wU
int j = k >> 1; jbu8~\"
if (queue[j]>queue[k]) 8p9bCE>\
break; C\nhqkn
SortUtil.swap(queue,j,k); )V ;mwT!Q
k = j; vj\dA2!~
} YZ7|K<
} X4t s)>"d
;A'Z4=*~
} 2 :mn</z
&)vC;$vD`
} jhu&&==\f
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SortUtil： C;`XlQG `
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package org.rut.util.algorithm; ?jt}*q>X]
&A)B~"[~
import org.rut.util.algorithm.support.BubbleSort; A~+S1
import org.rut.util.algorithm.support.HeapSort; s]mY*@a%
import org.rut.util.algorithm.support.ImprovedMergeSort; dd%h67J2<
import org.rut.util.algorithm.support.ImprovedQuickSort; : G`hm{
import org.rut.util.algorithm.support.InsertSort; DrBUe'RH:M
import org.rut.util.algorithm.support.MergeSort; \ZhfgE8{%
import org.rut.util.algorithm.support.QuickSort; ~r$jza~o(
import org.rut.util.algorithm.support.SelectionSort; ]Xf% ,iu
import org.rut.util.algorithm.support.ShellSort; @`Eg(
XC "'Q+
/** gV`=jAE_
* @author treeroot [],1lRYI9_
* @since 2006-2-2 13%t"-@bh
* @version 1.0 ^;maotHn
*/ J.dLPKU;-
public class SortUtil { t|!j2<e
public final static int INSERT = 1; z=_Ef3`M
public final static int BUBBLE = 2; \,&co
public final static int SELECTION = 3; Nl9I*x^e
public final static int SHELL = 4; 7&"n`@(.!
public final static int QUICK = 5; ]oV{t<0a
public final static int IMPROVED_QUICK = 6; QgD g}\P
public final static int MERGE = 7; P=+nB*hG
public final static int IMPROVED_MERGE = 8; )aao[_ZS
public final static int HEAP = 9; VX+jadYdq
MJCzo |w
public static void sort(int[] data) { hL;8pE8
sort(data, IMPROVED_QUICK); +sx 8t
} J}@z_^|"mJ
private static String[] name={ VY"9?2?/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ra/Ukv_v
}; =w5O&(
C?=P
private static Sort[] impl=new Sort[]{ _s$_Sa ;
new InsertSort(), RZ7(J
new BubbleSort(), mVsIAC$}8
new SelectionSort(), drd/jH&
new ShellSort(), e9Pk"HHl
new QuickSort(), ~-t>z
new ImprovedQuickSort(), UMp/\&0
new MergeSort(), A@D2+fS
new ImprovedMergeSort(), 3 M10fI?
new HeapSort() ym/fFm6h
}; lz0TK)kuC
TO*BH^5R
public static String toString(int algorithm){ ^o@,3__7Q
return name[algorithm-1]; Y<b-9ai<w
} [kzd(u
3bd5FsI^pU
public static void sort(int[] data, int algorithm) { kctzNGF|
impl[algorithm-1].sort(data); ^(f4*m6`
} L0]_hxE?
@a>2c$%
public static interface Sort { GF:`>u{C
public void sort(int[] data); :@xm-.D
} IU]^&e9u
<uk1?Qg
public static void swap(int[] data, int i, int j) { ai^4'{#zi
int temp = data; lJs<
data = data[j]; /?6|&
data[j] = temp; Af5D>/
} {[t`j+J
} :!f(F9