[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; 66z1_lA
} %PkJ7-/b|^
int i1=l; Rjh/M`|
int i2=mid+1; t%8*$"~X
for(int cur=l;cur<=r;cur++){ N'[^n,$:
if(i1==mid+1) `D?vmSQ
data[cur]=temp[i2++]; (a)d7y.oo
else if(i2>r) kyY tL_SD
data[cur]=temp[i1++]; RYvS,hf6z
else if(temp[i1] data[cur]=temp[i1++]; 4;&(
else 8c~b7F \
data[cur]=temp[i2++]; ~G"6^C:x
} Kq.)5%~>
} !FO||z(vb
sq :ff
} pLk?<y
t,=khZ
改进后的归并排序: u1>|2D
N$_Rzh"9rr
package org.rut.util.algorithm.support; @-u/('vpB
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import org.rut.util.algorithm.SortUtil; L*L3;y|
m3,]j\
/** /4=O^;
* @author treeroot nP_s+k
* @since 2006-2-2 )8e_<^M
* @version 1.0 8 Z#)Xb4
*/ SJ+.i u/
public class ImprovedMergeSort implements SortUtil.Sort { .!=g
1Rwk}wL
private static final int THRESHOLD = 10; 30F&FTW
V-I_SvWv\
/* w"A'uFXLc
* (non-Javadoc) 5N ' QG<jE
* <$7*yV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c t,p?[Q
*/ tJg
public void sort(int[] data) { yQCfn1a)
int[] temp=new int[data.length]; @^%zh
mergeSort(data,temp,0,data.length-1); 6'?Y]K
} (5'qEi ea
LI(Wu6*Y
private void mergeSort(int[] data, int[] temp, int l, int r) { Yo:>m*31
int i, j, k; uZW1 :cx
int mid = (l + r) / 2; H$on"
if (l == r) 7?cZ9^z`w
return; (MbI8B>
if ((mid - l) >= THRESHOLD) {)jQbAr(G
mergeSort(data, temp, l, mid); tQUp1i{j\
else G~YV6??
insertSort(data, l, mid - l + 1); HH[?LKd<
if ((r - mid) > THRESHOLD) 3pq&TYQU
mergeSort(data, temp, mid + 1, r); ~fQ#-ekzqk
else Z&/;6[
insertSort(data, mid + 1, r - mid); (wvDiW5
)zen"](cze
for (i = l; i <= mid; i++) { 9-)oA+$
temp = data; )S>~h;
} B4&x?-0ZC
for (j = 1; j <= r - mid; j++) { _RjM .
temp[r - j + 1] = data[j + mid]; 2<Ub[R
} b~v
int a = temp[l]; iVnrv`k,
int b = temp[r]; [O(78n$$
for (i = l, j = r, k = l; k <= r; k++) { m"@M~~bh
if (a < b) { /[_>U{~P#
data[k] = temp[i++]; xae}8E
a = temp; RI cA)I.
} else { zneK)C8&q3
data[k] = temp[j--]; P1H`NOC
b = temp[j]; 1>l{c
} }%_x T
} ?u 9) GJO[
} t</Kel|D
/koNcpJ
/** !L-.bve!
* @param data lty`7(\
* @param l <[[DS%(M^
* @param i &~^"yo#b
*/ bg[q8IBCd
private void insertSort(int[] data, int start, int len) { R}Z"Yxx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g24)GjDi
} fl+ [(x<
} C6O1ype
} _vvnxG!x&
} h^34{pKDn
hRGK W
堆排序： c9iCH~
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package org.rut.util.algorithm.support; /3rt]h"
3}n=od=
import org.rut.util.algorithm.SortUtil; WynHcxC
;c<:"ad(
/** -\AB!#fh
* @author treeroot S1%{/w
* @since 2006-2-2 (a]'}c$X9`
* @version 1.0 .|KxQn}
*/ -twIF49
public class HeapSort implements SortUtil.Sort{ OFCkQEG=y>
QQ1+uY
/* (non-Javadoc) ;STO!^9~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |~rDEv3
*/ 3"!2C,3c#
public void sort(int[] data) { )!p=0&z@{
MaxHeap h=new MaxHeap(); 6Z|/M6f
h.init(data); &l{yEWA}g
for(int i=0;i h.remove(); %^gT.DsX-
System.arraycopy(h.queue,1,data,0,data.length); %+FM$xyJ
} =@V4V} ?
~SP.&>Q>
private static class MaxHeap{ t3v*P6
u ldea)
void init(int[] data){ w0tlF:Eg
this.queue=new int[data.length+1]; c3i|q@ k
for(int i=0;i queue[++size]=data; e+4p__TmZ
fixUp(size); ^/mQo`[G
} C[? itk!
} @+B .<@V
:#I8Cf
private int size=0; >Mrz$ z{x
m'oVqA&
private int[] queue; Joq9.%7Q
q.~.1 '`!
public int get() { 26.iFt/:
return queue[1]; Z(*nZT,
} bHWy9-
X#1So.}c
public void remove() { }B^s!y&b
SortUtil.swap(queue,1,size--); ZEUd?"gaR
fixDown(1); :a#]"z0
} Y5cUOfYT
file://fixdown 4 lJ@qhV
private void fixDown(int k) { RAXqRP,iw
int j; 6bo,x
while ((j = k << 1) <= size) { : gv[X
if (j < size %26amp;%26amp; queue[j] j++; aW4tJN%!
if (queue[k]>queue[j]) file://不用交换 o(C({]UO/
break; z=BX-)
SortUtil.swap(queue,j,k); i LK8Wnrq
k = j; l yO_rZT
} B2WPjhzD
} B58H7NH ;G
private void fixUp(int k) { /Eh\07p
while (k > 1) { )0fQ(3oOg
int j = k >> 1; peR=J7
if (queue[j]>queue[k]) .Eh~$wm
break; 1Qhx$If~
SortUtil.swap(queue,j,k); ;oWhTj`
k = j; o9q%=/@,
} ~e,
} (3{'GX2c
=u${2=
} pk: ruf`)
5j{o0&=_$
} TBrAYEk
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SortUtil： 7+#^:;19`
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package org.rut.util.algorithm; Y?ZTl762
n?!.r c
import org.rut.util.algorithm.support.BubbleSort; ')Ozz<{
import org.rut.util.algorithm.support.HeapSort; u0w2v+
import org.rut.util.algorithm.support.ImprovedMergeSort; 7$,["cJX
import org.rut.util.algorithm.support.ImprovedQuickSort; L>xcgV7
import org.rut.util.algorithm.support.InsertSort; VGWqy4m
import org.rut.util.algorithm.support.MergeSort; ,'={/)c<
import org.rut.util.algorithm.support.QuickSort; =h5&\4r=
import org.rut.util.algorithm.support.SelectionSort; $-M1<?5
import org.rut.util.algorithm.support.ShellSort; nU)}!` E
NTs< ;ED
/** [)Xu60?Q
* @author treeroot pWbzBgM?nU
* @since 2006-2-2 iDp]lu
* @version 1.0 zdU<]ge
*/ H6bomp"
public class SortUtil { V1xpJ
public final static int INSERT = 1; \ $X3n\
public final static int BUBBLE = 2; `:i|y
public final static int SELECTION = 3; K)l{3\9l|
public final static int SHELL = 4; P]]9Sqo7
public final static int QUICK = 5; Qn[4&nUD
public final static int IMPROVED_QUICK = 6; P,CJy|[L
public final static int MERGE = 7; p Ic;9
public final static int IMPROVED_MERGE = 8; *G'zES0x
public final static int HEAP = 9; @T?:[nPf&F
j3Cpo x
public static void sort(int[] data) { i,4
sort(data, IMPROVED_QUICK); *=~ 9?
} 2=(=Wjk.
private static String[] name={ [q9TTJ@2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A6q,"BS^d
}; :==kC672
]bhzB
private static Sort[] impl=new Sort[]{ 5(2g*I
new InsertSort(), I;uZ/cZ|/
new BubbleSort(), e>uV8!u
new SelectionSort(), &tLg}7?iB
new ShellSort(), 84e)huAs
new QuickSort(), ,XI,B\eNk
new ImprovedQuickSort(), K&D -1u
new MergeSort(), \P&'4y~PL
new ImprovedMergeSort(), EG7ki0
new HeapSort() y 9/27yWB
}; $hg W>e
^p|@{4f]
public static String toString(int algorithm){ P,xayy
return name[algorithm-1]; h"#^0$f
} 0Q]x[;!k
- Kj$A@~x
public static void sort(int[] data, int algorithm) { ,UH`l./3DX
impl[algorithm-1].sort(data); o=w&&B
} PKwHq<vAsB
5t:4%
public static interface Sort { pc^(@eD
public void sort(int[] data); Rj^bZ%t
} |~8iNcIS
~Jp\'P7*
public static void swap(int[] data, int i, int j) { 8 E.u3eS
int temp = data; 7I(Sa?D:
data = data[j]; sJt&`kZ
data[j] = temp; |Wi$@sWO
} S%mN6b~{
} +]`MdOu