[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; 4mEJu
} ) LTV+?
int i1=l; l @@pXg3
int i2=mid+1; ^P/OHuDL
for(int cur=l;cur<=r;cur++){ w}t}Sh
if(i1==mid+1) (x.qyYEoI
data[cur]=temp[i2++]; Fi\)ka\u
else if(i2>r) |ITb1O`_P
data[cur]=temp[i1++]; x!pd50-
else if(temp[i1] data[cur]=temp[i1++]; )1R[X!KQ7
else Tyb'p9
data[cur]=temp[i2++]; riaL[4c
} g}K/ba'
} $=^}J6
/h`gQyGuY
} E?|NYu#I6
X%fLV(
改进后的归并排序: S1'?"zAmd
a|3+AWL%
package org.rut.util.algorithm.support; >9#) obw
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import org.rut.util.algorithm.SortUtil; c'Z)uquvP
O&~ @ior
/** nmE H/a
* @author treeroot R%)F9P$o
* @since 2006-2-2 ^8-,S[az
* @version 1.0 f;l}Z|dok6
*/ {)!ua7GF0H
public class ImprovedMergeSort implements SortUtil.Sort { 9L4;#cy
{.o4U0+
private static final int THRESHOLD = 10; >c5
^gpd '*b
/* 7v0VZ(UR
* (non-Javadoc) eoQt87VCU
* ^nOh8L;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T?.l_"%%d
*/ D+jvF
public void sort(int[] data) { :P+7ti@
int[] temp=new int[data.length]; 0JR)-*
mergeSort(data,temp,0,data.length-1); ?A r}QN
} j> dZ26 >N
lb=fS%
private void mergeSort(int[] data, int[] temp, int l, int r) { g}a+%Obb
int i, j, k; OPqhdqo
int mid = (l + r) / 2; ]iFW>N*a
if (l == r) D@[#7:rHL
return; @ptrF pSL
if ((mid - l) >= THRESHOLD) [O!/hppN
mergeSort(data, temp, l, mid); ?6x&A t
else yGC HWP
insertSort(data, l, mid - l + 1); }NdLd!
if ((r - mid) > THRESHOLD) |o(te
mergeSort(data, temp, mid + 1, r); f.oY:3h:
else xUa9>=JU{
insertSort(data, mid + 1, r - mid); UCFFF%
oblw!)
for (i = l; i <= mid; i++) { n:s _2h(u
temp = data; mc@Z+t'
} 1Ak0A6E
for (j = 1; j <= r - mid; j++) { een62-`
temp[r - j + 1] = data[j + mid]; ^(7l!
} Fy$C._C$
int a = temp[l]; T<yfpUzX
int b = temp[r]; ~G6xk/+n-m
for (i = l, j = r, k = l; k <= r; k++) { /6n"$qon6
if (a < b) { @$$J}~{
data[k] = temp[i++]; gf4Hq&Rf
a = temp; qvhG^b0h
} else { Ep')@7^n
data[k] = temp[j--]; \RFA?PuY
b = temp[j]; /;21?o
} &f?JtpB
} NxK.q)tj6
} rfSEL 57'
29|nt1Z
/** gS]
* @param data 7M?Sndp$
* @param l _@y9=e
* @param i ;>X;cZMd
*/ 9fM=5
private void insertSort(int[] data, int start, int len) { j-FMWEp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); JPgFTr
} #E<~WpP
} Cgf4E{\U!
} \lDh"
} ?A*<Z%}1?
A4;~+L:M
堆排序： )2Y]A^Y
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package org.rut.util.algorithm.support; w^3S6lK
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import org.rut.util.algorithm.SortUtil; 7nW <kA
^d(gC%+!u
/** .O+,1&D5
* @author treeroot &/otoAr(
* @since 2006-2-2 g0;6}n
* @version 1.0 j^f54Ky.
*/ Gs04)KJm<
public class HeapSort implements SortUtil.Sort{ YuzVh9jTI
{ W5 _KX
/* (non-Javadoc) R7FI{A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u-V( 2?
*/ _l,-SQgj
public void sort(int[] data) { mOLz(0
MaxHeap h=new MaxHeap(); -ni@+Dy
h.init(data); j4=\MK
for(int i=0;i h.remove(); ;LKYA?=/V
System.arraycopy(h.queue,1,data,0,data.length); Y2g%{keo
} QNXS.!\P
W3%RB[s-
private static class MaxHeap{ ,&Zk63V
U2Ky4UFm
void init(int[] data){ .&>3nu
this.queue=new int[data.length+1]; >f|0# *
for(int i=0;i queue[++size]=data; [w+1<ou;j
fixUp(size); u{l4O1k/c
} ,k9.1kjO*)
} i?mUQ'H
7 VYhRC-
private int size=0; ps/|^8aGZ
,t'"3<^Jg
private int[] queue; yy3`E}vX7
yaHkWkl =
public int get() { ?TmVLny
return queue[1]; %?S[{ 4A&
} tWTC'Gx-J
\3F)M`g
public void remove() { E^pn-rB
SortUtil.swap(queue,1,size--); }R hSt]
fixDown(1); y4&x`|tv
} m-cw5lW
file://fixdown t[G7&ovj
private void fixDown(int k) { 9p4SxMMO
int j; vP%:\u:{
while ((j = k << 1) <= size) { #9qX:*>h
if (j < size %26amp;%26amp; queue[j] j++; f&$$*a
if (queue[k]>queue[j]) file://不用交换 -7Kstc-
break; +p]@b
SortUtil.swap(queue,j,k); 'S=eW_ 0/
k = j; w2r*$Q
} ,1vFX$
} 2xBh
private void fixUp(int k) { 7p{uRSE4._
while (k > 1) { ]2[\E~^KU
int j = k >> 1; B.gEV*@
if (queue[j]>queue[k]) ;L%\[H>G
break; ;9Wimf]G,E
SortUtil.swap(queue,j,k); IiX2O(*ZE
k = j; `)BZk[64
} 9wdX#=I
} 0p\Kf(|E*6
'RV wxd
} {OS[0LB
'BVI^H4
} 5T'viG}%
b%VZPKA;
SortUtil： ,}Im^~5
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package org.rut.util.algorithm; #!r>3W&
/c7jL4oD
import org.rut.util.algorithm.support.BubbleSort; (^<skx>
import org.rut.util.algorithm.support.HeapSort; =#&+w[4?&.
import org.rut.util.algorithm.support.ImprovedMergeSort; N)KN!!
import org.rut.util.algorithm.support.ImprovedQuickSort; kn&BGYt
import org.rut.util.algorithm.support.InsertSort; ;YBk.} %
import org.rut.util.algorithm.support.MergeSort; 9h6siK(F
import org.rut.util.algorithm.support.QuickSort; `vf]C'
import org.rut.util.algorithm.support.SelectionSort; C2DAsSw
import org.rut.util.algorithm.support.ShellSort; Kzwe36O;?
yv$hIU2X
/** $5Rx>$~+d
* @author treeroot B? XK;*])
* @since 2006-2-2 )31xl6@
* @version 1.0 C7&L9k~jf
*/ &.Yu%=}
public class SortUtil { #X?E#^6?E
public final static int INSERT = 1; $bZ5@)E
public final static int BUBBLE = 2; *I k/Vu%;
public final static int SELECTION = 3; |"eC0u
public final static int SHELL = 4; :G5O_T$
public final static int QUICK = 5; 5mm&l+N)
public final static int IMPROVED_QUICK = 6; ~O3VX75f
public final static int MERGE = 7; SkU9iW(k
public final static int IMPROVED_MERGE = 8; N#X* 0i"
public final static int HEAP = 9; i> {0h3Y
(>*L-&-
public static void sort(int[] data) { &uf|Le4
sort(data, IMPROVED_QUICK); x5M+\?I<2
} Sa:;j4
private static String[] name={ 5tY/d=\k
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5hDPX\
}; TR'_v[uK3
d"lk"R
private static Sort[] impl=new Sort[]{ veS) j?4
new InsertSort(), "R% RI( y{
new BubbleSort(), xhMAWFg|
new SelectionSort(), o9OCgP`Y
new ShellSort(), NezE]'}
new QuickSort(), 9]I{GyH
new ImprovedQuickSort(), mCQ:<#
new MergeSort(), ~/2OK!M
new ImprovedMergeSort(), B}N1}i+
new HeapSort() r(zn1;zl
}; t&_X{!1X"w
FY/F}C,o
public static String toString(int algorithm){ U8<C4
return name[algorithm-1]; s/P+?8'9
} cSmy M~[
H9WXp&
public static void sort(int[] data, int algorithm) { e&NJj:Ph*
impl[algorithm-1].sort(data); GX*9R>
} r<Q0zKW!jN
pK0@H"$8
public static interface Sort { LFvZ 7M\\
public void sort(int[] data); "#w%sG^_
} +IlQZwm~
-<(RYMk*)
public static void swap(int[] data, int i, int j) { df&.!7_R`
int temp = data; H,LJ$ py
data = data[j]; U~oGg$
data[j] = temp; [Y^h)k{-$
} }gd'pgN"t
} q&LCMnv"P