[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; iozt&~o
} e ,'_xV
int i1=l; h^45,E C
int i2=mid+1; o 11jca|
for(int cur=l;cur<=r;cur++){ dbLZc$vPj
if(i1==mid+1) iXkF1r]i
data[cur]=temp[i2++]; iU918!!N
else if(i2>r) ]EbM9Fo-U
data[cur]=temp[i1++]; f5"k55}
else if(temp[i1] data[cur]=temp[i1++]; GKqm&/M*=
else KkyVSoD\
data[cur]=temp[i2++]; B IEO,W|
} w/<L Ag
} )m+W j
ssA`I<p#
} A 'be8
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改进后的归并排序: ^e5=hH-%
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package org.rut.util.algorithm.support; 8%mu8l
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import org.rut.util.algorithm.SortUtil; w"F 9l
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/** ,t744k')
* @author treeroot c):/!Q
* @since 2006-2-2 539>WyG5
* @version 1.0 Es`Px_k
*/ DK~xrU'
public class ImprovedMergeSort implements SortUtil.Sort { ~Cttzn]pR
@;4zrzQi7
private static final int THRESHOLD = 10; G>=*yqo
7+cO_3AB
/* 2s8a $3
* (non-Javadoc) bj^5yX;2
* ?81c 4w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @{e}4s?7od
*/ ]q[D>6_
public void sort(int[] data) { =BeygT^
int[] temp=new int[data.length]; CW K7wZM
mergeSort(data,temp,0,data.length-1); uZYF(Yu
} iyE7V_O T
B@))8.h]
private void mergeSort(int[] data, int[] temp, int l, int r) { XJB)rP
int i, j, k; gg/-k;@ Rf
int mid = (l + r) / 2; iVr JQ
if (l == r) ^CH=O|8j
return; 2'Uu:Y^
if ((mid - l) >= THRESHOLD) J{<X7uB
mergeSort(data, temp, l, mid); Hio0HL-
else :Ov6_x]*
insertSort(data, l, mid - l + 1); z6P$pqyF
if ((r - mid) > THRESHOLD) *a^(vo
mergeSort(data, temp, mid + 1, r); B mb0cFQ
else "{xrL4BtC
insertSort(data, mid + 1, r - mid); m7V/zne
w.o@7|B1N
for (i = l; i <= mid; i++) { W i.&e
temp = data; VGN5<?PrN
} >6-`}G+|
for (j = 1; j <= r - mid; j++) { `RW HN/U
temp[r - j + 1] = data[j + mid]; Uc>lGo1j
} Z\rwO>3
int a = temp[l]; 4"ZP 'I;
int b = temp[r]; YP<ms
for (i = l, j = r, k = l; k <= r; k++) { _61gF[r4!Y
if (a < b) { gJ+'W1$/
data[k] = temp[i++]; VQ@
a = temp; e%M;?0j
} else { Y|qTyE%
data[k] = temp[j--]; {S\{Ii6
b = temp[j]; ?z+eWL
} {YC@T(
} ]/6z; ~3U
} Ix}sK"}[n
e`s ~.ZF
/** >R_&Ouh:
* @param data G_JA-@i%
* @param l 372rbY
* @param i ejd(R+
*/ _f,C[C[e&
private void insertSort(int[] data, int start, int len) { ({_{\9O,3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T>Z<]s
} 0mVNQxHI
} qR{=pR
} V0YZp
} F(n$
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堆排序： IOH}x4
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package org.rut.util.algorithm.support; B6 ;|f'e!
} OR+Io
import org.rut.util.algorithm.SortUtil; j (d~aqW
q2j{tP#
/** z<;HQX,
* @author treeroot Or+U@vAnk
* @since 2006-2-2 _[3D
* @version 1.0 }X6m:#6
*/ $%Kfq[Q
public class HeapSort implements SortUtil.Sort{ BO&bmfp7,
3hH<T.@)
/* (non-Javadoc) =nS3p6>rZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #!# l45p6
*/ gf@:R'$:+
public void sort(int[] data) { B9 uoVcW
MaxHeap h=new MaxHeap(); WH}y"W
h.init(data); {P./==^0
for(int i=0;i h.remove(); I236RIq
System.arraycopy(h.queue,1,data,0,data.length); (ZizuHC
} F>l] 9!P|m
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private static class MaxHeap{ P@B]
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void init(int[] data){ 59A}}.@?m
this.queue=new int[data.length+1]; )akoa,#%6c
for(int i=0;i queue[++size]=data; t:Q*gWRh
fixUp(size); A/s?x>QA
} Il'fL'3
} t*u:hex
+6\Zj)
private int size=0; <'*LRd$1
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private int[] queue; Q%G8U#Tm
AkV#J, 3LC
public int get() { eMsd37J
return queue[1]; u#.2w)!D
} x;d6vBTUb
6{b>p+U
public void remove() { IJ"q~r$
SortUtil.swap(queue,1,size--); D@.6>:;il
fixDown(1); VONDc1%ga
} eauF~md,
file://fixdown 0h_|t-9j
private void fixDown(int k) { Y3b *a".X
int j; +0Y&`{#Z
while ((j = k << 1) <= size) { =H8;iS2R
if (j < size %26amp;%26amp; queue[j] j++; 6&x@.1('z
if (queue[k]>queue[j]) file://不用交换 7:1Lol-V
break; c@7rqHU-0
SortUtil.swap(queue,j,k); p5iuYHKk?
k = j; &QgR*,5eo
} Rm( "=(
} }7Q%6&IR
private void fixUp(int k) { 5b*C1HS@X
while (k > 1) { T~e.PP
int j = k >> 1; |{ip T SH
if (queue[j]>queue[k]) L8B!u9%
break; 77Y/!~kd
SortUtil.swap(queue,j,k); V,njO{Q
k = j; 7.oM J
} fHFE){
} y6a3tG
k(HUUH_z
} |L ev.,,Ph
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} g7H(PF?
Z T%5T}i
SortUtil： /N{*"s2)
2+XAX:YD
package org.rut.util.algorithm; })%{AfDRF
h_'*XWd@
import org.rut.util.algorithm.support.BubbleSort; AwR=]W;j
import org.rut.util.algorithm.support.HeapSort; 9*M,R,y
import org.rut.util.algorithm.support.ImprovedMergeSort; @yYkti;4-
import org.rut.util.algorithm.support.ImprovedQuickSort; F^:3?JA_
import org.rut.util.algorithm.support.InsertSort; t6c4+D'{].
import org.rut.util.algorithm.support.MergeSort; 59u}W 0
import org.rut.util.algorithm.support.QuickSort; l/5 hp.
import org.rut.util.algorithm.support.SelectionSort; [/r(__.
import org.rut.util.algorithm.support.ShellSort; `a/`,N
^2rN>k,?
/** RRJ%:5&
* @author treeroot e0 ecD3
* @since 2006-2-2 =3P)q"
* @version 1.0 %|oym.-I6
*/ At;LO9T3z
public class SortUtil { h?U O&(
public final static int INSERT = 1; i%?*@uj
public final static int BUBBLE = 2; P%n>Tg80M
public final static int SELECTION = 3; a<e[e>
public final static int SHELL = 4; SpBy3wd
public final static int QUICK = 5; ~xTt204S
public final static int IMPROVED_QUICK = 6; -9?]IIVb
public final static int MERGE = 7; ;_=&-mz
public final static int IMPROVED_MERGE = 8; omx=
public final static int HEAP = 9; A#,ZUOPGH
;'1d1\wiDQ
public static void sort(int[] data) { V7/Rby Q
sort(data, IMPROVED_QUICK); [}m[)L\
} 8ao_i=&x
private static String[] name={ UiNP3TJ'L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *T1_;4i
}; {!`6zBsP
#vlgwA
private static Sort[] impl=new Sort[]{ lOp`m8_=
new InsertSort(), %C]>9."
new BubbleSort(), Fr-SvsNFB
new SelectionSort(), 7tp36TE
new ShellSort(), p#tI;"\y
new QuickSort(), 4,ag(^}=
new ImprovedQuickSort(), zt%Mx>V@
new MergeSort(), WIGi51yC.x
new ImprovedMergeSort(), rJB}qYD
new HeapSort() ALHIGJW:6$
}; 8P`"M#fI
eMzk3eOJ
public static String toString(int algorithm){ 5)40/cBe
return name[algorithm-1]; 46;uW{EY
} 5h*p\cl!Y
{;oPLr+Z
public static void sort(int[] data, int algorithm) { J}t%p(mb
impl[algorithm-1].sort(data); :(%5:1W
} lTsjxw o
"@n%Z
public static interface Sort { dh\P4
public void sort(int[] data); =(^3}x
} l^}c!
b,@/!ia
public static void swap(int[] data, int i, int j) { G~m<;
int temp = data; 2mU.7!g)
data = data[j]; 7>RY/O;Z,
data[j] = temp; rN>R|].
} *zLMpL_
} 5r0YA IJ