[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; h']RP
} YN_#x
int i1=l; d?GfT$1
int i2=mid+1; \v44Vmfz
for(int cur=l;cur<=r;cur++){ nS"K dPM
if(i1==mid+1) o<1e-
data[cur]=temp[i2++]; GBzC<e#
else if(i2>r) K20n355uE
data[cur]=temp[i1++]; TDBWYppM
else if(temp[i1] data[cur]=temp[i1++]; J:dF^3Y
else *>V6KW
data[cur]=temp[i2++]; D{Y~kV|
} fs&J%ku\
} A9qCaq{
9m0`;~!
} vC E$)z'"
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改进后的归并排序: i:Pg&474f
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package org.rut.util.algorithm.support; #HWz.Wb
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import org.rut.util.algorithm.SortUtil; %eGxQDIXg
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/** DalQ.
* @author treeroot yA?>v'K
* @since 2006-2-2 5#g<L ~
* @version 1.0 fO[X<|9
*/ `J[(Dx'y=t
public class ImprovedMergeSort implements SortUtil.Sort { G]E$U]=9r:
0){%4
private static final int THRESHOLD = 10; 2hEB?ZAQZ
V2g,JFp&
/* jFM8dl n
* (non-Javadoc) >F8&wh'BjY
* kFgN^v^t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6[$kEKOY=
*/ wYSvI
public void sort(int[] data) { zwR@^ 5^6
int[] temp=new int[data.length]; Wv_5sPqLW
mergeSort(data,temp,0,data.length-1); t>7t4>X
} "Ol;0>$
OMd{rH
private void mergeSort(int[] data, int[] temp, int l, int r) { t;Jt+k~
int i, j, k; IJ!]1fXy+
int mid = (l + r) / 2; d8<Lk9H9R
if (l == r) bv;&oc:r
return; 6#T?g7\pyR
if ((mid - l) >= THRESHOLD) RKdf1C
mergeSort(data, temp, l, mid); E"!9WF(2t5
else ?=jmyDXH!
insertSort(data, l, mid - l + 1); b5Rjn1@
if ((r - mid) > THRESHOLD) $Rv}L'L
mergeSort(data, temp, mid + 1, r); ?Pw#!t
else V[wEn9
insertSort(data, mid + 1, r - mid); H1| -f]!
:{h,0w'd
for (i = l; i <= mid; i++) { $;>,
temp = data; J9)wt ?%j
} =vT3SY
for (j = 1; j <= r - mid; j++) { n} GIf&
temp[r - j + 1] = data[j + mid]; }U7>_b2
} qnW5I_]
int a = temp[l]; l<PGUm:_
int b = temp[r]; Fly@"W4a
for (i = l, j = r, k = l; k <= r; k++) { #jd?ocoY
if (a < b) { ,a?)#X
data[k] = temp[i++]; _Jk-nZgn
a = temp; =}\]i*
} else { FRF3V>
data[k] = temp[j--]; -le:0NUwI
b = temp[j]; LnZ*,>1Z
} ' :g8a=L
} >ly= O
} D4s*J21)D
7 tF1g=\
/** }zRYT_:
* @param data [A|W0
* @param l *0i
* @param i 4v3y3
*/ (Ew o
private void insertSort(int[] data, int start, int len) { {5.,gb@6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *`ehI_v :
} V J){@
} =ADAMP
} I m_yY
} ~Cks)mJs
Z@ h<xo*r
堆排序： ?@|1>epgd
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package org.rut.util.algorithm.support; EYGJDv(S
174H@
import org.rut.util.algorithm.SortUtil; fB1JU1
miuJ!Kr'
/** ]j*o&6cQf
* @author treeroot zVxiCyU
* @since 2006-2-2 X^_,`H@
* @version 1.0 1k2Ck
*/ vH# US
public class HeapSort implements SortUtil.Sort{ "M7ry9dDH
~IE:i-Kz
/* (non-Javadoc) g]$>G0E`oD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1kio.9NIp
*/ 1dfA 8=L,s
public void sort(int[] data) { '0H+2
MaxHeap h=new MaxHeap(); 5ez"B]&T
h.init(data); 5zpk6FR$
for(int i=0;i h.remove(); $Y$!nPO
System.arraycopy(h.queue,1,data,0,data.length); 2s-f?WetbP
} i= ~HXr}
jA=uK6m
private static class MaxHeap{ n.$<D[@
)K@ 20Q+0K
void init(int[] data){ gD=s~DgN)
this.queue=new int[data.length+1]; m f4@g05
for(int i=0;i queue[++size]=data; s=q\BmG
fixUp(size); BRoi`.b:
} z9h`sY~
} 'QeqWn
xw%?R=&L
private int size=0; yu#Jw
.Yha(5(
private int[] queue; feNr!/
sN-5vYfC*
public int get() { TQ=\l*R(A
return queue[1]; lqX]'gu]\
} Rr%]/%
DbPw)aCj
public void remove() { 8x58sOR=
SortUtil.swap(queue,1,size--); g/`i:=
fixDown(1); m\1*/6oV
} {nryAXK
file://fixdown =:~~RqHl
private void fixDown(int k) { KT?vs5jg$&
int j; bRNE:))r_
while ((j = k << 1) <= size) { 2(\>PN-
if (j < size %26amp;%26amp; queue[j] j++; deHBY4@
if (queue[k]>queue[j]) file://不用交换 !G\1$"T$
break; )/ s9ty
SortUtil.swap(queue,j,k); %=#&\ldPS
k = j; ]lz,?izMR
} \VtCkb
} Oq+C<}eg
private void fixUp(int k) { ~p'/Z@Atu
while (k > 1) { p@cPm8L3
int j = k >> 1; Ao{wd1
if (queue[j]>queue[k]) ,Oxdqxu7
break; Qx.E+n\
SortUtil.swap(queue,j,k); jy&p_v1
k = j; y;<jE.7>
} ?)]sfJG
} $9W9*WQL
q#OLb"bTr
} "<!|am(
rB=1*.}FLc
} "Jv&=zJ
'J!P:.=a>
SortUtil： jS R:ltd
ShCAkaj_
package org.rut.util.algorithm; yD(/y"P,9
3kKXzIh
import org.rut.util.algorithm.support.BubbleSort; HO' ELiZ_q
import org.rut.util.algorithm.support.HeapSort; :dLS+cTC
import org.rut.util.algorithm.support.ImprovedMergeSort; m{b(^K9}
import org.rut.util.algorithm.support.ImprovedQuickSort; 2a? d:21 B
import org.rut.util.algorithm.support.InsertSort; \BJnJk!%
import org.rut.util.algorithm.support.MergeSort; w'L;`k;Q
import org.rut.util.algorithm.support.QuickSort; &X|z(vSJ$
import org.rut.util.algorithm.support.SelectionSort; {jk {K6 }
import org.rut.util.algorithm.support.ShellSort; [;|g2\
pMX7Rl
/** @&,r|-
* @author treeroot "}PmAr e
* @since 2006-2-2 "B+M5B0Z
* @version 1.0 -$e\m] }Z
*/ ig?]kZ
public class SortUtil { It]CoAo+
public final static int INSERT = 1; 1 #EmZ{*
public final static int BUBBLE = 2; #wC4$y<>
public final static int SELECTION = 3; H2k>E}`
public final static int SHELL = 4; !_x-aro3<
public final static int QUICK = 5; bz}T}nj
public final static int IMPROVED_QUICK = 6; iT.hXzPzr*
public final static int MERGE = 7; + FLzK(
public final static int IMPROVED_MERGE = 8; N4HnW0
public final static int HEAP = 9; q=96Ci_a
C}+(L3Z
public static void sort(int[] data) { jriliEz;f
sort(data, IMPROVED_QUICK); j4G,Z4
} Q%t8cJL
private static String[] name={ ?dxhe7m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @<alWBS
}; ?+5K2Zk
E"u>&uPH
private static Sort[] impl=new Sort[]{ 0D.YO<PU
new InsertSort(), (F_#LeJ|
new BubbleSort(), g00XZ0@
new SelectionSort(), H 5sj% v
new ShellSort(), Q>sq:R+'
new QuickSort(), 7&T1RB'>
new ImprovedQuickSort(), u9VJ{F
new MergeSort(), /D~z}\k
new ImprovedMergeSort(), $9hOWti
new HeapSort() wl9E
}; u 4)i7
#>>-:?X
public static String toString(int algorithm){ =&}dP%3LC)
return name[algorithm-1]; "I+wU`AIek
} yYF80mnJz
;PLby]=O
public static void sort(int[] data, int algorithm) { -ud!j
impl[algorithm-1].sort(data); /B1NcRS
} ~G"6^C:x
Kq.)5%~>
public static interface Sort { !FO||z(vb
public void sort(int[] data); sq :ff
} s6KZV@1
u1>|2D
public static void swap(int[] data, int i, int j) { %Xp}d5-
int temp = data; F!SmCE(0x
data = data[j]; ,T1t`
data[j] = temp; eqjl$QWPJS
} r!#a.
} L4Kkbt<x