[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; uuy0fQQ8ti
} M[e{(iQ:
int i1=l; 3>^B%qg6
int i2=mid+1; ~\zIb/ #
for(int cur=l;cur<=r;cur++){ %F<3_#Y
if(i1==mid+1) C%P.`NxA
data[cur]=temp[i2++]; K81&BVx/
else if(i2>r) P[e#j
data[cur]=temp[i1++]; iT1HbAT]
else if(temp[i1] data[cur]=temp[i1++]; x o72JJ
else *C> N
data[cur]=temp[i2++]; @!(V0-
} lPz5.(5'
} ;bq EfV0`2
i^/H>E%u
} <"S/M]9
KpO%)M!/Z#
改进后的归并排序: r\|"j8
.r@'9W^8
package org.rut.util.algorithm.support; u?8e>a
Q\$cBSJC1
import org.rut.util.algorithm.SortUtil; ralU9MN.
2K2jko9'a
/** $7\hszjZ
* @author treeroot JI92Dc*o
* @since 2006-2-2 8SMa5a{
* @version 1.0 e#4 iue7U
*/ AFNE1q;{\
public class ImprovedMergeSort implements SortUtil.Sort { kC+dQ&@g{
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private static final int THRESHOLD = 10; OH~I+=}.
hfQ^C6yR
/* $h'>Zvf
* (non-Javadoc) Lmyw[s\U
* |7G=f9V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H3o Um1
*/ cUr'mb
public void sort(int[] data) { $qhVow5~
int[] temp=new int[data.length]; O.P:~
mergeSort(data,temp,0,data.length-1); h&?tF~h
} 26c1Yl,DMn
t8b,@J`R
private void mergeSort(int[] data, int[] temp, int l, int r) { C$EvcF%1
int i, j, k; i52:<< 8a
int mid = (l + r) / 2; .e%B'
if (l == r) $`/J V?Z
return; E@\bFy_!>b
if ((mid - l) >= THRESHOLD) }\!38{&
mergeSort(data, temp, l, mid); p[-buB]
else FA;uu\
insertSort(data, l, mid - l + 1); *1;}c z
if ((r - mid) > THRESHOLD) fmj-&6
mergeSort(data, temp, mid + 1, r); ySwvjP7f
else uia-w^F e
insertSort(data, mid + 1, r - mid); R%N&Y~zH
``mW\=fe
for (i = l; i <= mid; i++) { ,~- dZs
temp = data; 8z,|N#
} NbnuQPb'
for (j = 1; j <= r - mid; j++) { -kd_gbnr3
temp[r - j + 1] = data[j + mid]; ~;0J4hR
} u9"1%
int a = temp[l]; O)!MWmr
int b = temp[r]; f^f{tOX
for (i = l, j = r, k = l; k <= r; k++) { #b4Pn`[
if (a < b) { |JW-P`tL0
data[k] = temp[i++]; {'#^
a = temp; 29E9ZjSK
} else { \f_YJit
data[k] = temp[j--]; %maLo RJ
b = temp[j]; RHGs(d7-
} )5U&^tJ
} T7=~l)I
} =?f\o*J)
lT3,G#(
/** |:i``gFj
* @param data 5M2G ;o
* @param l ;Qc_Tf=,
* @param i 8L<GAe
*/ 7usf^g[dh
private void insertSort(int[] data, int start, int len) { "[(I*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5/v@VUzH
} #eT{?_wM
} FXPw5
} H`$s63
} nkp!kqJ09
iQ9jt
堆排序： X#mppMU
ajayj|h
package org.rut.util.algorithm.support; o5\nqw^
&zr..i4O
import org.rut.util.algorithm.SortUtil; 2rq)U+
[*O#6Xu
/** j|&?BBa9
* @author treeroot eXI^9uH
* @since 2006-2-2 D^Bd>Ey4
* @version 1.0 >uuP@j
*/ BOLG#}sm
public class HeapSort implements SortUtil.Sort{ hmOhXE[a&
n)w@\Uyc
/* (non-Javadoc) L\8tqy.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %QUV351H
*/ XX5 ):1
public void sort(int[] data) { 7CzZHkTg
MaxHeap h=new MaxHeap(); >8~+[e
h.init(data); 8W 9%NW3&
for(int i=0;i h.remove(); !Jw
System.arraycopy(h.queue,1,data,0,data.length); t+k"$zR
} 3VbQDPG
_^'fp
private static class MaxHeap{ Dcq\1V.e`W
<D4.kM
void init(int[] data){ tnz BNW8
this.queue=new int[data.length+1]; MPMJkL$F^
for(int i=0;i queue[++size]=data; /_?E0r
fixUp(size); YBN. waL
} |lIkmW{
} yOGaW~
*usfJ-
private int size=0; F8?&Ql/hdz
]`&EB~K&NY
private int[] queue; `,4"[6S
$!Z6?+
public int get() { 2i#wJ8vrF
return queue[1]; ;uNcrv0J
} mCe,(/>l+
&"fMiK3
public void remove() { A"k6n\!n;
SortUtil.swap(queue,1,size--); q[Hxy
fixDown(1); ;Br8\2=$
} Ze'AZF
file://fixdown {IJV(%E
private void fixDown(int k) { <0vQHND,3
int j; db:b%1hk:
while ((j = k << 1) <= size) { ?7^H1L
if (j < size %26amp;%26amp; queue[j] j++; +O}6 8N
if (queue[k]>queue[j]) file://不用交换 XRKL;|cd
break; )MLOYX
SortUtil.swap(queue,j,k); RyC]4QyC
k = j; =;0#F&
} Miqu
} mKtZ@r)u
private void fixUp(int k) { f GE+DjeA
while (k > 1) { x:O?Fj
int j = k >> 1; bS<lB!
if (queue[j]>queue[k]) 2BBGJE
break; 0K`3BuBs
SortUtil.swap(queue,j,k); K7Kd{9-2
k = j; &4sUi K"
} }XWic88!~
} .JZoZ.FAb
"2)<'4q5)
} WZ'8{XY8
;#P@(ZVT
} mfQQ<Q@
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SortUtil： 4\x'$G
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package org.rut.util.algorithm; R8F[ 7&(
[Pi8gj*
import org.rut.util.algorithm.support.BubbleSort; u^|XQWR$:
import org.rut.util.algorithm.support.HeapSort; u1/4WYJeJ
import org.rut.util.algorithm.support.ImprovedMergeSort; /$'tO3
import org.rut.util.algorithm.support.ImprovedQuickSort; 49^;T;'v
import org.rut.util.algorithm.support.InsertSort; ,h5\vWZ
import org.rut.util.algorithm.support.MergeSort; +'2Mj|d@p
import org.rut.util.algorithm.support.QuickSort; a[]=*(AZI
import org.rut.util.algorithm.support.SelectionSort; VmHok
import org.rut.util.algorithm.support.ShellSort; $GNN*WmHw
[!,&A{.!
/** 3_~V(a
* @author treeroot )9 5&-Hs
* @since 2006-2-2 $FZ~]Ef
* @version 1.0 HhhN8t
*/ QUVwO m
public class SortUtil { h^D?G2O
public final static int INSERT = 1; |sMRIW,P
public final static int BUBBLE = 2; 'U.)f@L#w
public final static int SELECTION = 3; /jaTH_Q),:
public final static int SHELL = 4; fchsn*R%-
public final static int QUICK = 5; .C$S DhJ~
public final static int IMPROVED_QUICK = 6; UX;?~X
public final static int MERGE = 7; 7/a[;`i*!
public final static int IMPROVED_MERGE = 8; L/_h5Q:'W
public final static int HEAP = 9; gPh;
?>cx;"xF
public static void sort(int[] data) { >N62t9Ll[
sort(data, IMPROVED_QUICK); c [sydl
} 9u^PM
private static String[] name={ &YGd!Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6X~.J4
}; ^[,Q2MHCT(
x^Q:U1
private static Sort[] impl=new Sort[]{ ,7KP
new InsertSort(), 7n9&@D3:P
new BubbleSort(), ]W~\%`#8?
new SelectionSort(), ;{EIx*<d
new ShellSort(), O;z:?
new QuickSort(), y$|%K3
new ImprovedQuickSort(), px8988X
new MergeSort(), $nF|n+m
new ImprovedMergeSort(), 4l7TrCB
new HeapSort() S[JeW
}; $s+/OgG4H
ADK)p?
public static String toString(int algorithm){ M<^]Ywq*p
return name[algorithm-1]; [~*5uSG
} ?g^42IYG
5xC4lT/U
public static void sort(int[] data, int algorithm) { )12.W=p
impl[algorithm-1].sort(data); 39to5s,
} G%^jgr)
L#O1>
public static interface Sort { \ne1Xu:hM
public void sort(int[] data); dp#JvZb
} E@ J/_l;
lC/1,Z/M
public static void swap(int[] data, int i, int j) { #(swVo:+E
int temp = data; `ppyCUX
data = data[j]; 7irpD7P>
data[j] = temp; &H8wYs
} Zc9@G-
} %O6r