[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; YLv'43PL
} (HE9V]
int i1=l; }h!f eP
int i2=mid+1; v,{yU\)
for(int cur=l;cur<=r;cur++){ EYEnN
if(i1==mid+1) r^paD2&}
data[cur]=temp[i2++]; DLMM/WJg@
else if(i2>r) 8UyMVY
data[cur]=temp[i1++]; Y M\ K%rk
else if(temp[i1] data[cur]=temp[i1++]; ;n=.>s*XL'
else ( _)jkI \
data[cur]=temp[i2++]; t@N=kV
} a$"Hvrj
} *b/`Ya4
oxkoA
} ~r`9+b[9{
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改进后的归并排序: <_tT<5'[$u
`A^"%@j
package org.rut.util.algorithm.support; (Dl$kGn
orfO^;qTY
import org.rut.util.algorithm.SortUtil; Hx*;jpy(2
ZUR6n>r
/** S.m{eur!,E
* @author treeroot ps%q9}J
* @since 2006-2-2 .my0|4CQ#@
* @version 1.0 @&:ar
*/ v` 7RCg`
public class ImprovedMergeSort implements SortUtil.Sort { - 'W++tH=
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private static final int THRESHOLD = 10; PuT@}tw
ws|;`
/* &<J[Q%2
* (non-Javadoc) S=nzw-(I
* 5>j)kx=J9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )Es"LP]
*/ h`k"A7M
public void sort(int[] data) { 7:3$Ey
int[] temp=new int[data.length]; H_ox_ u}
mergeSort(data,temp,0,data.length-1); "zRoU$X
} ez^@NK
M9@ri^x
private void mergeSort(int[] data, int[] temp, int l, int r) { oMTf"0EIW
int i, j, k; MP 2~;T}~
int mid = (l + r) / 2; [E JQ>?D
if (l == r) ,JN8f]a^"g
return; c8>hcV
if ((mid - l) >= THRESHOLD) uYil ?H{kH
mergeSort(data, temp, l, mid); mB9r3[
else GBFtr
insertSort(data, l, mid - l + 1); x{c/$+Z[
if ((r - mid) > THRESHOLD) glXZZ=j
mergeSort(data, temp, mid + 1, r); `Ru3L#@
else '-b*EZU8t
insertSort(data, mid + 1, r - mid); 5~WGZc
!0C^TCuG
for (i = l; i <= mid; i++) { D{4YxR PX
temp = data; x,S P'fcP
} GJp85B!PlO
for (j = 1; j <= r - mid; j++) { Za8#$`zq
temp[r - j + 1] = data[j + mid]; mAW,?h
} ?Ovqp-sw
int a = temp[l]; hk;7:G
int b = temp[r]; eT8}
for (i = l, j = r, k = l; k <= r; k++) { ?6jkI2w
if (a < b) { _}VloiY
data[k] = temp[i++]; ZRVT2VfN
a = temp; /'DsB%7g
} else { z,bQQ;z9
data[k] = temp[j--]; X'% ;B
b = temp[j]; nn9wdt@.]
} S (N\cw$
} FEW_bP/4
} 1`9xIm*9w
@b~fIW_3>
/** }~h(w^t
* @param data _#}n~}d
* @param l Kmv+1T0,
* @param i u% n*gcY
*/ VA%Un,5h
private void insertSort(int[] data, int start, int len) { lmSo8/%T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N**g]T 0`
} ~~,rp) )
} /q$,'^.A
} #I3$3^0i#
} ?EK?b s
P7f,OY<@%o
堆排序： gxMfu?zk"
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package org.rut.util.algorithm.support; hyT1xa
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import org.rut.util.algorithm.SortUtil; b(I2m
tpTAeQ*:d
/** iTg;7~1pY
* @author treeroot U"4?9. k
* @since 2006-2-2 NAzX". g
* @version 1.0 4~OQhiJ
*/ \S)2
public class HeapSort implements SortUtil.Sort{ N9<Ujom
n7YEG-J
/* (non-Javadoc) 3o|I[!2.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R1W}dRE}
*/ Iu35#j
public void sort(int[] data) { ZB[Qs
MaxHeap h=new MaxHeap(); `K >?ju"
h.init(data); %D`,k*X
for(int i=0;i h.remove(); 02k4N%
System.arraycopy(h.queue,1,data,0,data.length); 5I@w~z
} CCGV~e+
?<yM7O,4
private static class MaxHeap{ @v*/R%rv t
rBN)a"
void init(int[] data){ N=)z
this.queue=new int[data.length+1]; TV}}dw
for(int i=0;i queue[++size]=data; .\qj;20W
fixUp(size); ;!T{%-tP
} V8~jf-\$b
} nB ".'=
='E$-_
private int size=0; CC3v%^81l^
47T}0q,
private int[] queue; zK+52jhi
NS,5/t
public int get() { 6dEyv99
return queue[1]; OlQ,Ce
} =N|kn<h4
Ab1/.~^
public void remove() { S2VVv$r_6
SortUtil.swap(queue,1,size--); B )JM%r
fixDown(1); jRpdft
} vG2b:[W
file://fixdown ^aRgMuU
private void fixDown(int k) { efuK
int j; ,`8Y8
while ((j = k << 1) <= size) { 2PSTGG8JV
if (j < size %26amp;%26amp; queue[j] j++; n!He&
if (queue[k]>queue[j]) file://不用交换 )DUL)S
break; mi2o1"Jd$`
SortUtil.swap(queue,j,k); (a6?s{(
k = j; ~tGCLf]c\
} 4rU!4l
} 4o9$bv
private void fixUp(int k) { DjW$?>
while (k > 1) { rFL$QC2
int j = k >> 1; P l{QOR
if (queue[j]>queue[k]) 9|S`ub'
break; RwTzz] M
SortUtil.swap(queue,j,k); 1;W=!Fx
k = j; e"+dTq8W
} s([Wn)I
} ZcryAm:I
f3 ]
} oVB"f
I/UQ'xx
} 8HoP(+?
5su.+4z\
SortUtil： \-. Tg!Q6
LBX%HGH
package org.rut.util.algorithm; |tG+iF@4
_qTpy)+
import org.rut.util.algorithm.support.BubbleSort; (buw^ ,NwZ
import org.rut.util.algorithm.support.HeapSort; X_70]^XL
import org.rut.util.algorithm.support.ImprovedMergeSort; IF?xnu
import org.rut.util.algorithm.support.ImprovedQuickSort; ?B4#f!X
import org.rut.util.algorithm.support.InsertSort; C;sgK
import org.rut.util.algorithm.support.MergeSort; D&[Z;,CHMA
import org.rut.util.algorithm.support.QuickSort; #Mi|IwL
import org.rut.util.algorithm.support.SelectionSort; DcFCKji
import org.rut.util.algorithm.support.ShellSort; c)1=U_61
.u< U:*
/** U4wpjHg
* @author treeroot 9!t4>
* @since 2006-2-2 cztS]dcf>~
* @version 1.0 s[-]cHQ
*/ <7gMl
public class SortUtil { Uh+jt,RB`
public final static int INSERT = 1; d1NE%hg3
public final static int BUBBLE = 2; YMAQ+A!
public final static int SELECTION = 3; 8t9aHla
public final static int SHELL = 4; O:u%7V/
public final static int QUICK = 5; >RR<eYu7m
public final static int IMPROVED_QUICK = 6; 4Vx+[8W
public final static int MERGE = 7; "3t\em!
public final static int IMPROVED_MERGE = 8; >0T3'/k<H
public final static int HEAP = 9; ~N[|bPRmhE
!3KPwI,
public static void sort(int[] data) { <R~KM=rL
sort(data, IMPROVED_QUICK); 3LrsWAz'
} tQ0=p| T]
private static String[] name={ R`C.ha
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )[DpK=[N^p
}; >q&L/N5
/'Bdq?!B&
private static Sort[] impl=new Sort[]{ ;qT5faKB3J
new InsertSort(), 3*\8p6G
new BubbleSort(), kh&_#,
new SelectionSort(), kGj]i@(PA4
new ShellSort(), td/5Bmj
new QuickSort(), STp!8mL
new ImprovedQuickSort(), !pS~'E&q
new MergeSort(), U$EM.ot
new ImprovedMergeSort(), `]LODgk~
new HeapSort() z9fNk%
}; `7>K1slQ}S
s'AQUUrb<
public static String toString(int algorithm){ \#_@qHAG
return name[algorithm-1]; Znq(R8BMW
} Q^q=!/qQ
I tgH>L'
public static void sort(int[] data, int algorithm) { \y,;Cfl<
impl[algorithm-1].sort(data); ,{TQ ~LP
} I`#EhH
%g5jY%dg.r
public static interface Sort { :X|AW?*
public void sort(int[] data); ?PYNE
} TwwIt5_fN
;HT0w_,
public static void swap(int[] data, int i, int j) { hF9B?@n?B
int temp = data; Cea"qNq=k
data = data[j]; {z-NlH
data[j] = temp; }RH lYN
} f!^)!~
} *+&z|Pwv[^