[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; IeAi'
} p: u@? k
int i1=l; l4YTR4D
int i2=mid+1; }"STc&1
for(int cur=l;cur<=r;cur++){ a&Me#H{
if(i1==mid+1) }[y_Fr0
data[cur]=temp[i2++]; 6('CB|ga
else if(i2>r) T2TWb
data[cur]=temp[i1++]; *9US>mVy
else if(temp[i1] data[cur]=temp[i1++]; |=[._VH1
else kR<\iT0j
data[cur]=temp[i2++]; 5Vr#>W
} =3=8oFx8
} <CWOx&hr
tlgg~MViS
} @2sr/gX^
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改进后的归并排序: Pu(kCH{
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package org.rut.util.algorithm.support; ^@<Ia-x
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import org.rut.util.algorithm.SortUtil; F1/BtGvQE
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/** eC_i]q&o|
* @author treeroot oGL2uQXX
* @since 2006-2-2 ZQyXzERp
* @version 1.0 dB8 e
*/ @&GY5<&b
public class ImprovedMergeSort implements SortUtil.Sort { 91UC>]}H
$\L=RU!c}
private static final int THRESHOLD = 10; j07b!j:"\}
Ue=1NnRDkA
/* ->W rBO
* (non-Javadoc) L$?YbQo7
* 0y%s\,PsT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S~B{G T\M
*/ b@B\2BT
public void sort(int[] data) { |AS9^w
int[] temp=new int[data.length]; OpmPw4?}
mergeSort(data,temp,0,data.length-1); OG^#e+
} 10tt':
^2nH6,LPS
private void mergeSort(int[] data, int[] temp, int l, int r) { %-an\.a.
int i, j, k; juMHc$d17
int mid = (l + r) / 2; "5"{~3Gw^
if (l == r) %F(lq*8X
return; ?>mpUH
if ((mid - l) >= THRESHOLD) 4+Y9":<
mergeSort(data, temp, l, mid); dK]#..
else o[g]Va*8
insertSort(data, l, mid - l + 1); ue -a/a
if ((r - mid) > THRESHOLD) ,#hNHFa'JH
mergeSort(data, temp, mid + 1, r); )!5"\eys
else HG3iK
insertSort(data, mid + 1, r - mid); #66u<FaG
nMOXy\&mI
for (i = l; i <= mid; i++) { !3\( d{
temp = data; G#3$sz
} q)N^
for (j = 1; j <= r - mid; j++) { vAtR\Vh
temp[r - j + 1] = data[j + mid]; :JK+V2B$H
} Q@rlqWgU ~
int a = temp[l]; eY_BECJ+OO
int b = temp[r]; >[g.8'hI
for (i = l, j = r, k = l; k <= r; k++) { ,<;.'r
if (a < b) { Ll`nO;h
data[k] = temp[i++]; \F<C$cys\
a = temp; T!|-dYYI
} else { P%ZU+ET
data[k] = temp[j--]; =_[Ich,}
b = temp[j]; `&J=3x
} r|3<UR%
} 3u'@anre
} F 7X] h
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/** Ju_(,M-Vgr
* @param data ?$=Ml$
* @param l UZo[]$"Q`
* @param i 8< z
*/ \j0016;
private void insertSort(int[] data, int start, int len) { nr%P11U\c
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *a`_,Q{x
} FB O_B
} wdRk+
} pZ 7KWk4
} |^O3~!JP(>
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堆排序： XXb,*u 3
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package org.rut.util.algorithm.support; T/q*k)IoR
&_3o1<
import org.rut.util.algorithm.SortUtil; <H|]^An!H
Ca3 {e1
/** JiGS[tR
* @author treeroot *s!T$oc
* @since 2006-2-2 Kp[5"N8
* @version 1.0 DK<}q1xi
*/ rR(\fX!dg
public class HeapSort implements SortUtil.Sort{ ! ;R}=
G.qjw]Llf
/* (non-Javadoc) {%z5^o1)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7/bF04~%
*/ la{o<||Aq
public void sort(int[] data) { lht :%Ts$
MaxHeap h=new MaxHeap(); Gk)6ljL
h.init(data); g?>
for(int i=0;i h.remove(); C{YTHNn
System.arraycopy(h.queue,1,data,0,data.length); KXcE@q9
} !{XVaQ?x
cB2~W%H
private static class MaxHeap{ F#|mN0op
Pa/2])w
void init(int[] data){ Zrq\:KxX
this.queue=new int[data.length+1]; 6W)#FO`
for(int i=0;i queue[++size]=data; Suk;##I
fixUp(size); |q 0iX2W
} dEfP272M
} xgWVxX^)
D}?JX5.
private int size=0; '^BTa6W}m
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private int[] queue; _+qtH< F/
V/J-zH&
public int get() { A~8-{F 31
return queue[1]; R'aA\k-
} 8-)@q|
}QJ6"s
public void remove() { CMYkxU
SortUtil.swap(queue,1,size--); `W%R
fixDown(1); B{NGrC`5)
} 1Pd2%
file://fixdown l6T5]$
private void fixDown(int k) { ?8$h%Ov-
int j; @eRv`O"
while ((j = k << 1) <= size) { P,7beHjf
if (j < size %26amp;%26amp; queue[j] j++; $WbfRyXi7'
if (queue[k]>queue[j]) file://不用交换 %Pk@`t(3
break; }M${ _D
SortUtil.swap(queue,j,k); NJ(H$tB@
k = j; YF13&E2`\
} CjU?3Ag
} gm}zF%B"
private void fixUp(int k) { 6"V86b0)h}
while (k > 1) { z_87;y;=
int j = k >> 1; 'e7;^s
if (queue[j]>queue[k]) 0lpUn74F
break; {Lvta4}7(
SortUtil.swap(queue,j,k); D__*?frWpW
k = j; f6%7:B d
} )IGx3+I ,
} S{JBV@@tC
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} Og"\@n
:JzJ(q/
} ''B}^yKEW
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SortUtil： n<MreKixE
,/..f!bp
package org.rut.util.algorithm; sT>l ?L
%>,Kd6bdg
import org.rut.util.algorithm.support.BubbleSort; rq^VOK|L
import org.rut.util.algorithm.support.HeapSort; Z|zT%8.8N
import org.rut.util.algorithm.support.ImprovedMergeSort; HeM-
import org.rut.util.algorithm.support.ImprovedQuickSort; 'dcO-A:>
import org.rut.util.algorithm.support.InsertSort; 01o,9_|FL
import org.rut.util.algorithm.support.MergeSort; VRz9;=m
import org.rut.util.algorithm.support.QuickSort; 3NgyF[c
import org.rut.util.algorithm.support.SelectionSort; 3!u:*ibt
import org.rut.util.algorithm.support.ShellSort; +JY]J89
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/** t+n+_X
* @author treeroot f_ UwIP
* @since 2006-2-2 I=}R Z9
* @version 1.0 H)i%\7F5
*/ PYW>
public class SortUtil { CR`}{?2H
public final static int INSERT = 1; $(;0;!t.
public final static int BUBBLE = 2; ,%,.c^-
public final static int SELECTION = 3; 9C\@10D
public final static int SHELL = 4; i,y7R?-K
public final static int QUICK = 5; KgEfhO$W
public final static int IMPROVED_QUICK = 6; 4UnN~
public final static int MERGE = 7; ehQ~+x
public final static int IMPROVED_MERGE = 8; mjbV^^>
public final static int HEAP = 9; Y>PC>
IJofbuzw:
public static void sort(int[] data) { Nrk/_0^
sort(data, IMPROVED_QUICK); Eb9{
} K?acRi
private static String[] name={ S$ 91L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z;J{&OJ3qM
}; (c9!:
,98`tB0
private static Sort[] impl=new Sort[]{ vaj-|&
new InsertSort(), nh%Q";
new BubbleSort(), t}-rN5GO
new SelectionSort(), R?+:Js/
new ShellSort(), G:{\-R'
new QuickSort(), r#/Bz5Jb*
new ImprovedQuickSort(), C07U.nzh
new MergeSort(), ;.b^A
new ImprovedMergeSort(), (Kaunp5_`
new HeapSort() Be2yS]U
}; BI0 A0
Qb&gKQtt@
public static String toString(int algorithm){ VHTr;(]hk
return name[algorithm-1]; +v"%@lC};
} gqan]b_
wM&WR2
public static void sort(int[] data, int algorithm) { 2^=.jML[
impl[algorithm-1].sort(data); nAW`G'V#
} pN7 v7rs
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public static interface Sort { ~QE-$;
public void sort(int[] data); :*s+X$x,<
} kK$*,]iCp
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public static void swap(int[] data, int i, int j) { D``>1IA]
int temp = data; O,?aVgY
data = data[j]; j-wz7B
data[j] = temp; JM Ikr9/$
} S*?x|&a
} RaLc}F)9