[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; VwudNjL
} @(bg#
int i1=l; Q,K$)bM
int i2=mid+1; (xfh 9=.
for(int cur=l;cur<=r;cur++){ JM1O7I
if(i1==mid+1) 5cGQ`l
data[cur]=temp[i2++]; q<j9l'dHG
else if(i2>r) ;j.-6#n
data[cur]=temp[i1++]; ZNVrja*
else if(temp[i1] data[cur]=temp[i1++]; :YQI1 q[6
else I8a3:)
data[cur]=temp[i2++]; k#bG&BF
} (dfC}x(3h
} (3Q$)0t
o$eo\X?J?
} (\D E1q
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改进后的归并排序: ue^HhZ9
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package org.rut.util.algorithm.support; $ay!'MK0d
EK= y!>
import org.rut.util.algorithm.SortUtil; MVnN0K4
_p>F43%p
/** GeDI\-
* @author treeroot J%-4ZB"
* @since 2006-2-2 KF6C=,Yc%
* @version 1.0 d<+hQ\BF,
*/ re_nb)4g
public class ImprovedMergeSort implements SortUtil.Sort { 6I: 6+n
=[8K#PZ$w
private static final int THRESHOLD = 10; y>.t[*zT
y=c={Qz@vn
/* 4(sHUWT
* (non-Javadoc) e pp04~
* ~|9VVeE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PWZd<
*/ .dMdb7
public void sort(int[] data) { UOsK(mB
int[] temp=new int[data.length]; 4d%0a%Z
mergeSort(data,temp,0,data.length-1); PxgJ7d
} )l$}plT4
`<yQ`Y_X
private void mergeSort(int[] data, int[] temp, int l, int r) { nj0sh"~+
int i, j, k; (ix.
int mid = (l + r) / 2; jQzl!f1c3
if (l == r) e*qGrg(E
return; W^H3=hZ
if ((mid - l) >= THRESHOLD) !b7"K|
mergeSort(data, temp, l, mid); ;xe.0j0h
else w8>h6x"
insertSort(data, l, mid - l + 1); * eC[74Kng
if ((r - mid) > THRESHOLD) /ZD6pF
mergeSort(data, temp, mid + 1, r); h Fik>B#!
else 'Gqv`rq&
insertSort(data, mid + 1, r - mid); Qw:!Rw,x
G/Nc@XG\
for (i = l; i <= mid; i++) { V0v,s^\H
temp = data; 'Zp{
} 3q}j"x?
for (j = 1; j <= r - mid; j++) { UL-_z++G
temp[r - j + 1] = data[j + mid]; cd1G.10
} cu($mjC@T
int a = temp[l]; fE+zA)KX
int b = temp[r]; VJqk0w+
for (i = l, j = r, k = l; k <= r; k++) { =K18|Q0m
if (a < b) { _yv#v_Z
data[k] = temp[i++]; @2/|rq
a = temp; [K.1 X=O}
} else { tLWw<)t
data[k] = temp[j--]; ?:J_+?{E
b = temp[j]; 3{$7tck,
} u*G<?
} )^ Y+Vn
} )rK2%\Z
zo(#tQ-'m
/** ^sD M>OHp
* @param data u1$6:"2@5k
* @param l Ctz#9[|
* @param i L"|Bm{Run
*/ _ \6v@
private void insertSort(int[] data, int start, int len) { HCs^?s8Pp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^obuMQ;
} mkn1LzE|F
} Nv7-6C6<
} SlG v
} s2{SbOBis
i=aR~
堆排序： N $) G8
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package org.rut.util.algorithm.support; </{Zb.
[j+:2@
import org.rut.util.algorithm.SortUtil; Reikf}9Q
HeAXZA,
/** ;7lON-@BI
* @author treeroot =0=#M(w
* @since 2006-2-2 X ."z+-eh
* @version 1.0 F3}MM dX
*/ -I|xW
public class HeapSort implements SortUtil.Sort{ MjMDD
eWcqf/4?"
/* (non-Javadoc) R&Y_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JXK\mah
*/ h=7q;-@7
public void sort(int[] data) { KS$t
MaxHeap h=new MaxHeap(); u#@/^h;
h.init(data); VGV-t
for(int i=0;i h.remove(); a;HAuy`M x
System.arraycopy(h.queue,1,data,0,data.length); {cm?Q\DT
} %bDxvaftT
Cs6`lX >
private static class MaxHeap{ exb} y
/MF 7ZvN.
void init(int[] data){ UCLM*`M
this.queue=new int[data.length+1]; q-JTGCFl
for(int i=0;i queue[++size]=data; VsQ|t/|#
fixUp(size); M~taZt4
} ?F"o+]i+^
} iS$[dC ?N
SyvoN,;Q
private int size=0; +/ukS6>gr
,X?/FAcb
private int[] queue; DKIH{:L7
b(*\4n
public int get() { +:FXtO>n"
return queue[1]; GcVQz[E
} t?GH V3V
3B1\-ry1M
public void remove() { YN8x|DLi?
SortUtil.swap(queue,1,size--); 2)f_L|o,m
fixDown(1); 3(BL
} op6]"ZV-C
file://fixdown QQl.5'PP
private void fixDown(int k) { KL&/Yt
int j; ppAbG,7
while ((j = k << 1) <= size) { PtfG~$h?
if (j < size %26amp;%26amp; queue[j] j++; V?{d<Ng~J
if (queue[k]>queue[j]) file://不用交换 ZJ/528Ju
break; n7!T{+ge
SortUtil.swap(queue,j,k); B7%,D}
k = j; h.\I tK{)
} ?H=YJK$k
} :U?g']`Z##
private void fixUp(int k) { <o(;~
while (k > 1) { t#NPbLZ
int j = k >> 1; c^r8<KlI9
if (queue[j]>queue[k]) pv]@}+<Dt
break; `d_T3^ayu
SortUtil.swap(queue,j,k); J6Ilg@}\
k = j; N^;lp<{6?
} '.|}
} g257jarkMF
K"!rj.Da
} "hyfo,r
AwJg/VBo)
} 6r~9$IM
)PN8HJAArh
SortUtil： L=<xTbY
%KyZ15_(-L
package org.rut.util.algorithm; {Ydhplg{
c~T{;
import org.rut.util.algorithm.support.BubbleSort; v^C\ GDH
import org.rut.util.algorithm.support.HeapSort; 3!P^?[p3
import org.rut.util.algorithm.support.ImprovedMergeSort; $xu2ZBK
import org.rut.util.algorithm.support.ImprovedQuickSort; x^y$pr
import org.rut.util.algorithm.support.InsertSort; c&D+=
import org.rut.util.algorithm.support.MergeSort; QYA4C1h'
import org.rut.util.algorithm.support.QuickSort; +Nn >*sz
import org.rut.util.algorithm.support.SelectionSort; C >OeULD
import org.rut.util.algorithm.support.ShellSort; |r@;ulO
2f(`HSC'
/** Zr}>>aIJ]k
* @author treeroot UC&$8^
* @since 2006-2-2 I"]E}nd)
* @version 1.0 e{8C0=
*/ Rxy|Ag/I;V
public class SortUtil { BFNO yv
public final static int INSERT = 1; cC8$oCR?
public final static int BUBBLE = 2; }-[l)<F:
public final static int SELECTION = 3; dOD(<
public final static int SHELL = 4; IQBL;=.J.
public final static int QUICK = 5; 4f j}d.?
public final static int IMPROVED_QUICK = 6; Yyk~!G/@
public final static int MERGE = 7; % 3#g-
public final static int IMPROVED_MERGE = 8; caEIE0H~
public final static int HEAP = 9; b8a(.}8*
9No6\{[M
public static void sort(int[] data) { %[n5mF*`
sort(data, IMPROVED_QUICK); !d##q)D f?
} MKtI3vi?
private static String[] name={ I85wP}c(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" CQ!D{o=
}; ^(Gl$GC$Mu
]FR#ZvM>x
private static Sort[] impl=new Sort[]{ r%: :q^b3
new InsertSort(), T3b0"o27
new BubbleSort(), 0Cc3NNdz
new SelectionSort(), #8d#Jw
new ShellSort(), T#E{d
new QuickSort(), H~[q<ybxr
new ImprovedQuickSort(), li3X}
new MergeSort(), tdU'cc?M
new ImprovedMergeSort(), 2Jo|P A`9
new HeapSort() ~,W|i
}; ^C,rN;mX'
i(rYc
public static String toString(int algorithm){ s#~VN;-I
return name[algorithm-1]; QP%AJ[3ea%
} HmXxM:[4;
:|l0x a
public static void sort(int[] data, int algorithm) { dnANlNMk?
impl[algorithm-1].sort(data); } %3;j5 ;6
} |$8N*7UD
6\h*SBI?(
public static interface Sort { w^~s4Q_>>
public void sort(int[] data); "<oR.f=0
} tm;\m!^X{
0>,i] |Y
public static void swap(int[] data, int i, int j) { ;{m;CKHI
int temp = data; ='#7yVVcs
data = data[j]; 9aID&b+
data[j] = temp; BT:b&"AR[
} $jC+oYXj
} lfoPFJ Z