[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; a_c(7bQ
} (e'8>Pv
int i1=l; LG:k}z/T
int i2=mid+1; %Lh%bqGz
for(int cur=l;cur<=r;cur++){ %/uLyCUZ
if(i1==mid+1) uaO.7QSwN
data[cur]=temp[i2++]; uZL]mwkj]
else if(i2>r) W!<7OA g$
data[cur]=temp[i1++]; x\Q}fk?{t
else if(temp[i1] data[cur]=temp[i1++]; k( Sda>-
else %"v:x?d$$o
data[cur]=temp[i2++]; D=^&?@k<
} p(pfJ^/:(
} y>=YMD
c~tl0XU1
} ^<!R%"o-
MZ}0.KmaZ
改进后的归并排序: zd5=W"Y;]
_fS\p|W(E
package org.rut.util.algorithm.support; {?:]'c
0 8)f
import org.rut.util.algorithm.SortUtil; a"-uJn
!!Ww#x~k$[
/** ?+EAp"{j
* @author treeroot b[:,p?:@
* @since 2006-2-2 h)Fc<,vwBE
* @version 1.0 $\ZWQct
*/ N*36rR$^
public class ImprovedMergeSort implements SortUtil.Sort { D\5+2 G
)f$4:Pq
private static final int THRESHOLD = 10; b|-)p+ba
_b<;n|^
/* 8$~oiK%fw
* (non-Javadoc) </;e$fh`
* b4L7]&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zd%f5L('
*/ [KBa=3>{
public void sort(int[] data) { 6qDt6uB
int[] temp=new int[data.length]; [lML^CYQ
mergeSort(data,temp,0,data.length-1); ]D;*2Lw4&
} ?Ojv<L-f.:
jv.tg,c_6
private void mergeSort(int[] data, int[] temp, int l, int r) { 1av#u:jy~>
int i, j, k; J.JD8o9sa
int mid = (l + r) / 2; L E\rc A
if (l == r) C5^WJx[
return; rSv,;v
if ((mid - l) >= THRESHOLD) Z&>Cdgt*
mergeSort(data, temp, l, mid); Jw5@#j
else O>~@>/#
insertSort(data, l, mid - l + 1); m4~ |z
if ((r - mid) > THRESHOLD) )A*53>JV
mergeSort(data, temp, mid + 1, r); MUbKlX
else 0p.MH~mx
insertSort(data, mid + 1, r - mid); E] g Lwg9K
"y~*1kBu
for (i = l; i <= mid; i++) { i ZPNss
temp = data; `^/8dIya
} Jf4` 2KN\
for (j = 1; j <= r - mid; j++) { Y`8)`
temp[r - j + 1] = data[j + mid]; *bo| F%NAz
} #W8F_/!n|
int a = temp[l]; I)yaR+l
int b = temp[r]; d:iJUVpr
for (i = l, j = r, k = l; k <= r; k++) { A5F(-
if (a < b) { *~GI-h
data[k] = temp[i++]; 8nBYP+t,e
a = temp; kntY2FM
} else { 5ph CEKt;
data[k] = temp[j--]; 7*{l\^ism;
b = temp[j]; >{{ds--
} 5|0/$ SWd*
} \mLEwNhRY
} ShL!7y*rT{
\(7A7~
/** syLdm3d|
* @param data F&uiI;+zJ
* @param l , poc!n//
* @param i Y[)mHs2
*/ ma-GvWD2
private void insertSort(int[] data, int start, int len) { UH0l8ixc
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?i_/f}.K
} #Pk{emYW
} z59;Qk
} G~C-tAB
} T^]]z}k
5JaLE5-
堆排序： jNx{*2._r
Hd;NvNS
package org.rut.util.algorithm.support; :0(^^6Q\
U"|1@W#
import org.rut.util.algorithm.SortUtil; HaL'/V~
m$W2E.-$'#
/** esZhX)dS
* @author treeroot *YH!L{y
* @since 2006-2-2 k@%5P-e}
* @version 1.0 KsTGae;ds
*/ o=94H7@
public class HeapSort implements SortUtil.Sort{ ^L.I9a#]
wQ+il6
/* (non-Javadoc) n~ $S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w5y.kc;
*/ !nL94:8U
public void sort(int[] data) { y|BHSc3
MaxHeap h=new MaxHeap(); "LDNkw'
h.init(data); .<%q9Jy#
for(int i=0;i h.remove(); 0LC]%x+"
System.arraycopy(h.queue,1,data,0,data.length); cM9>V2:P
} ~X2# z|
x])j]k
private static class MaxHeap{ w(_:+-rqQ<
nm\f$K>Pg
void init(int[] data){ x&u@!# d]
this.queue=new int[data.length+1]; + AjV0#n
for(int i=0;i queue[++size]=data; 8zRw\]?
fixUp(size); :Kyr}-
} Pl|I{l*o(`
} xS/=9l/G
8hy1yt6t4~
private int size=0; (W"0c?i|]
OY|9V
private int[] queue; 1Zk1!> ?
n}b/9
public int get() { hiVDN"$$
return queue[1]; X`v6gv5qj
} &q4~WRnzJk
?5Z-w
public void remove() { cuG;1,?b
SortUtil.swap(queue,1,size--); bg9_$laDi
fixDown(1); S]T71W<i
} h$~$a;2cR
file://fixdown z,C>Rh9Id
private void fixDown(int k) { N0D5N(kH%
int j; ZA_~o#0%
while ((j = k << 1) <= size) { n|=yw6aV'
if (j < size %26amp;%26amp; queue[j] j++; @DM NLsQ
if (queue[k]>queue[j]) file://不用交换 LM"b%
break; 70*yx?TV
SortUtil.swap(queue,j,k); ;$!0pxL)s
k = j; FDFVhcr
} u0+<[Ia'q
} uY3$nlhP6
private void fixUp(int k) { DVs$3RL
while (k > 1) { EG=U](8T
int j = k >> 1; b[n6L5P5m2
if (queue[j]>queue[k]) RvVF^~u
break; Um/ g&k
SortUtil.swap(queue,j,k); S=w~bz,/
k = j; :SF8t`4`
} {[H#lX 4
} {iLr$89
u4=ulgi
} kmfz.:j{
xr)m8H
} ~fgS"F^7n
|])Ko08*tE
SortUtil： M@.?l=1X
5oD%~Fk l
package org.rut.util.algorithm; ,qgR+]?({
N~yGtnW
import org.rut.util.algorithm.support.BubbleSort; -cXVkH{
import org.rut.util.algorithm.support.HeapSort; rPW9lG
import org.rut.util.algorithm.support.ImprovedMergeSort; ON_GD"
import org.rut.util.algorithm.support.ImprovedQuickSort; 7,9zj1<
import org.rut.util.algorithm.support.InsertSort; EX3;|z@5;
import org.rut.util.algorithm.support.MergeSort; =U~\iJ
import org.rut.util.algorithm.support.QuickSort; 8=sMmpB 7u
import org.rut.util.algorithm.support.SelectionSort; i6h0_q8 >
import org.rut.util.algorithm.support.ShellSort; DGAg#jh
~65lDFY/
/** *UG=dl#F#
* @author treeroot yF&?gPh&
* @since 2006-2-2 1\,wV,
* @version 1.0 ^yF2xJ)9-
*/ b WZX
public class SortUtil { dNs<`2m
public final static int INSERT = 1; Q#$dp
public final static int BUBBLE = 2; j\@|oW0
public final static int SELECTION = 3; f['pHR%l2$
public final static int SHELL = 4; PmE2T\{s!
public final static int QUICK = 5; Sh5SOYLz
public final static int IMPROVED_QUICK = 6; Op<|Oz$Q|l
public final static int MERGE = 7; w~9=6|_
public final static int IMPROVED_MERGE = 8; &4l>_
public final static int HEAP = 9; =:'a)o
nxYp9,c"
public static void sort(int[] data) { x~O_v
sort(data, IMPROVED_QUICK); .7GAGMNS
} Vt,"5c
private static String[] name={ %8GY`T:^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" J$<g"z3
}; 3UX})mW
Mio~CJ"?
private static Sort[] impl=new Sort[]{ AJH-V 6
new InsertSort(), 4mzWNr>fb
new BubbleSort(), 9Lxj ]W2^
new SelectionSort(), r*l:F{
new ShellSort(), eqE%ofW
new QuickSort(), |LDo<pE*V4
new ImprovedQuickSort(), @oL<Ioh
new MergeSort(), .@ElfPP(L
new ImprovedMergeSort(), y/@.T\p
new HeapSort() o93A:fc
}; 3$`qy|=zO
O8:,XTAN
public static String toString(int algorithm){ =#<TE~n2(
return name[algorithm-1]; ojitBo~
} m<;&B
\YBY"J
public static void sort(int[] data, int algorithm) { !>+Na~eN
impl[algorithm-1].sort(data); =2eG j'}
} Z*|qbu)
;-d :!*
public static interface Sort { :bgi*pR{
public void sort(int[] data); uNYHEs6%T$
} xe6 2gaT
MW+]w~7_Q
public static void swap(int[] data, int i, int j) { =kvYE,,g_
int temp = data; lLT;V2=osX
data = data[j]; { O*maE"
data[j] = temp; `?VB)
} z<jWy$Ta;
} U>^-Db]