[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; S#b)RpY
} sf Zb$T J
int i1=l; XaH;
int i2=mid+1; X@\ 9}*9
for(int cur=l;cur<=r;cur++){ YM&i
if(i1==mid+1) f>[{1M]n\
data[cur]=temp[i2++]; ?D+H2[n\a
else if(i2>r) _BI[F m
data[cur]=temp[i1++]; :U,-v
else if(temp[i1] data[cur]=temp[i1++]; 30bdcDm,
else l9z{pZ\KM
data[cur]=temp[i2++]; X}Fqif4A
} NL-V",gI-~
} Y'Yu1mH)
5Bp>*MR/".
} &HtG&RvQf
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改进后的归并排序: w3FEX$`_
D77s3AyHK
package org.rut.util.algorithm.support; "eIE5h
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import org.rut.util.algorithm.SortUtil; +R',$YzD
^+O97<#6C
/** B=HEi\55K
* @author treeroot %+oV-o\ #A
* @since 2006-2-2 =}%Q}aPp
* @version 1.0 y]}N[l
*/ br')%f}m
public class ImprovedMergeSort implements SortUtil.Sort { ?nwg.&P
qT^0 %O:
private static final int THRESHOLD = 10; "4L_BJZ
'H(khS
/* :8U@KABH@h
* (non-Javadoc) 2Yg\<PsN
* Uy<n7*H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0RHjA&r3v
*/ )CD-cz6n
public void sort(int[] data) { )v %tyU
int[] temp=new int[data.length]; 11B8 LX
mergeSort(data,temp,0,data.length-1); w"Y'I$
} `V{'GF&[
j/uzsu+
private void mergeSort(int[] data, int[] temp, int l, int r) { a*qc
int i, j, k; W#foVAi .
int mid = (l + r) / 2; QPX3a8w*
if (l == r) i2Sh^\Xw
return; EMf"rGXu(
if ((mid - l) >= THRESHOLD) w01u~"E
mergeSort(data, temp, l, mid); (^$SMuC
else @@& ?,3
insertSort(data, l, mid - l + 1); {-51rAyi
if ((r - mid) > THRESHOLD) $AHdjQ[;6-
mergeSort(data, temp, mid + 1, r); fJ;1ii~
else pg3h>)$/
insertSort(data, mid + 1, r - mid); \9 k3;zw
FO)`&s"&2
for (i = l; i <= mid; i++) { wu3p2#-Z
temp = data; wRJ`RKJ-T
} 9'A^n~JHF
for (j = 1; j <= r - mid; j++) { [_HOD^
temp[r - j + 1] = data[j + mid]; 3aFD*S
} gp4@6HuUd
int a = temp[l]; 5UvqE_
int b = temp[r]; _+d*ljP)l3
for (i = l, j = r, k = l; k <= r; k++) { xzBUm
if (a < b) { :z2G a
data[k] = temp[i++]; +THK Jn!>
a = temp; c3J12+~;
} else { <%m$ V5h
data[k] = temp[j--]; ZL'krV
b = temp[j]; Rw|P$dbu
} +0M0g_sk
} S6{u(=H
} h"dn:5G:=
Na<);Pg
/** Mh=j^ [4Q
* @param data w\ddC DZ
* @param l R/kF,}^F
* @param i 6Ok]E`
*/ lbC9^~T+
private void insertSort(int[] data, int start, int len) { /|8/C40aY
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <X ([VZ
} z0?IQzR^T
} zE?@_p1gei
} Ie/dMB=t
} ;ibOd~
Zn6u6<O=
堆排序： '6GW.;
c:2LG_mQ
package org.rut.util.algorithm.support; [#;CBs5o
O|*-J
import org.rut.util.algorithm.SortUtil; ;Mz7emt
\`-a'u=S
/** G.>Ul)O:a
* @author treeroot /-Nq DRmJ
* @since 2006-2-2 <P#:dS%r
* @version 1.0 [I=1
*/ F_~A8y
public class HeapSort implements SortUtil.Sort{ Z |<
sZ#U{LI
/* (non-Javadoc) Dq`$3ZeA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y':65NMda
*/ B[fbPrM
public void sort(int[] data) { )^m"fQ+
MaxHeap h=new MaxHeap(); w-LaSJ(T
h.init(data); CM;B{*En
for(int i=0;i h.remove(); ) h=[7}|
System.arraycopy(h.queue,1,data,0,data.length); cnj32H^+
} =21m|8c
K$5mDScoJ
private static class MaxHeap{ t"X^|!hKIF
[!U! Z'i
void init(int[] data){ N_?15R7h
this.queue=new int[data.length+1]; >`I%^+z
for(int i=0;i queue[++size]=data; HH|N~pBJB
fixUp(size); Uac.8wQh
} ?4#wVzuzA
} \12y,fOJ
v>sjS3
private int size=0; UP*5M
?P(U/DS8
private int[] queue; @# GS4I
8Od7e`
public int get() { U;LX"'}
return queue[1]; x2tcr+o
} :\~YbA
8BX9JoDi
public void remove() { vo^2k13
SortUtil.swap(queue,1,size--); K?*p|&Fi?8
fixDown(1); g:Ry.=F7W
} 4f'!,Q ;
file://fixdown YtA<4XHU
private void fixDown(int k) { #aIV\G
int j; K/z2.Npn
while ((j = k << 1) <= size) { 8JU{]Z!G<;
if (j < size %26amp;%26amp; queue[j] j++; [vOk=
if (queue[k]>queue[j]) file://不用交换 $~NB .SY
break; .-GC,&RO
SortUtil.swap(queue,j,k); S>y}|MG
k = j; iO7s zi
} CRu {Ie5B
} %:\GYs(Y
private void fixUp(int k) { A}_0iwG
while (k > 1) { VbX$\Cs:
int j = k >> 1; EXti
if (queue[j]>queue[k]) Ys8D|HIk
break; uLrZl0%HT~
SortUtil.swap(queue,j,k); >9t+lr1
k = j; a"phwCc"%
} Z5,"KhB]
} JdX!#\O
t!o=-k
} K9) |b`E=
.7> g8
} bZu2.?{
tkW7wP;
SortUtil： 9!s)52qt
|l:,EA_v|
package org.rut.util.algorithm; fHXz{,?/w
U_~r0
import org.rut.util.algorithm.support.BubbleSort; 8}?w%FsN#
import org.rut.util.algorithm.support.HeapSort; fk\hrVP
import org.rut.util.algorithm.support.ImprovedMergeSort; jRhRw;
import org.rut.util.algorithm.support.ImprovedQuickSort; "89L^I
import org.rut.util.algorithm.support.InsertSort; ESnir6HoU
import org.rut.util.algorithm.support.MergeSort; Vn?|\3KY
import org.rut.util.algorithm.support.QuickSort; 69N8COLB
import org.rut.util.algorithm.support.SelectionSort; >Y;[+#H[
import org.rut.util.algorithm.support.ShellSort; ~z7Fz"o<
B !Z~jT
/** <%S[6*6U
* @author treeroot o^Qy71Uj
* @since 2006-2-2 '25zb+-
* @version 1.0 <=@6UPsn2
*/ Xw&vi\*m
public class SortUtil { CIAKXYM
public final static int INSERT = 1; $>hH{
public final static int BUBBLE = 2; ORFi0gFbA
public final static int SELECTION = 3; mX GW+
public final static int SHELL = 4; tD> qHR
public final static int QUICK = 5; D:PrFa
public final static int IMPROVED_QUICK = 6; 6k;>:[p
public final static int MERGE = 7; B*n_ VBd
public final static int IMPROVED_MERGE = 8; L\\'n )
public final static int HEAP = 9; ja^
$"fO/8Ex
public static void sort(int[] data) { j){0>O.V
sort(data, IMPROVED_QUICK); PKYm{wO-
} U%KsD 4B
private static String[] name={ fDwqu.K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;upYam"
}; )zu m.6pT
\:E=B1
private static Sort[] impl=new Sort[]{ OhTd>~R`<
new InsertSort(), GP_%.fO\M
new BubbleSort(), ;9hS_%ldX4
new SelectionSort(), *ch7z|wo.
new ShellSort(), G@rV9
new QuickSort(), fT5vO.a
new ImprovedQuickSort(), nBzju?X)I
new MergeSort(), rDC=rG
new ImprovedMergeSort(), ,{BF`5bn|
new HeapSort() wSG!.Ejc7
}; D9\ EkX
tW%!|T5/
public static String toString(int algorithm){ }ssL;q
return name[algorithm-1]; O@-(fyG
} c? >;UzM
i?6#>;f
public static void sort(int[] data, int algorithm) { dI~{0)s
impl[algorithm-1].sort(data); .ViOf){U\
} n(j5dN>]
HA~BXxa/
public static interface Sort { !uAqY\Is
public void sort(int[] data); #f }ORA
} "(vm0@8><
t?h\Af4Tf
public static void swap(int[] data, int i, int j) { 2xt$w%
int temp = data; -"d&Ow7o
data = data[j]; kD#hfYs)i
data[j] = temp; D()tP
} Vs, &
} .]ZMxDZ