[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; Yht |^ =a
} :gTtWJ04]
int i1=l; R\-]t{t`
int i2=mid+1; YnlZyw!
for(int cur=l;cur<=r;cur++){ S|r,RBeZ
if(i1==mid+1) GTke<R
data[cur]=temp[i2++]; #=,c8"O
else if(i2>r) 3jjV bm
data[cur]=temp[i1++]; sB wzb
else if(temp[i1] data[cur]=temp[i1++]; .4[M7)
else D[dI_|59a
data[cur]=temp[i2++]; [F+*e=wjN>
} o^W.53yX
} }p `A>
jIck!
} S,f:nLT
?*&5`Xh
改进后的归并排序: Yc^,Cj{OM
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package org.rut.util.algorithm.support; EbnV"]1
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import org.rut.util.algorithm.SortUtil; z@[-+Q:
DFp">1@`PR
/** `JcWH_[
* @author treeroot ,:8oVq>?
* @since 2006-2-2 )u1=, D
* @version 1.0 /_r`A
*/ r*UE>_3J
public class ImprovedMergeSort implements SortUtil.Sort { `t>:i!s/
RG:_:%@%}
private static final int THRESHOLD = 10; #6@4c5{2=4
\G2PK&)F
/* K"8!
* (non-Javadoc) #N'bhs
* !+(H(,gI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =-]NAj\
*/ aSIoq}c(
public void sort(int[] data) { S|]\q-qA&
int[] temp=new int[data.length]; gP`CQ0t
mergeSort(data,temp,0,data.length-1); d "25e"(~F
} S5[}kfe
7A^L$TY
private void mergeSort(int[] data, int[] temp, int l, int r) { %7 $X *
int i, j, k; oB+Ek~{z]
int mid = (l + r) / 2; .V@3zzv\
if (l == r) 814cCrr,o
return; Bi7&yS5V
if ((mid - l) >= THRESHOLD) H@'u$qr$:
mergeSort(data, temp, l, mid); ]QJ7q}
else 84/#,X!=s
insertSort(data, l, mid - l + 1); l:*.0Tj
if ((r - mid) > THRESHOLD) -'T^gEd)c
mergeSort(data, temp, mid + 1, r); C?g<P0h
else uOPLJ?%
insertSort(data, mid + 1, r - mid); 8aTo TA7JA
\f'=
for (i = l; i <= mid; i++) { ijmGk:L(
temp = data; _|7bpt9
} mXI'=Vo!S
for (j = 1; j <= r - mid; j++) { 6L3i
temp[r - j + 1] = data[j + mid]; NXOcsdcZu
} >aT~G!y
int a = temp[l]; JZ/T:Hsh4
int b = temp[r]; *fI\|%K
for (i = l, j = r, k = l; k <= r; k++) { n( zzH
if (a < b) { t@jke
data[k] = temp[i++]; )H+p6<
a = temp; 8|tnhA]~
} else { uP.dCs9-
data[k] = temp[j--]; bycnh
b = temp[j]; Zou;o9Ww
} a~Yq0d?`D
} %v[KLMo'(
} D&1(qi=x&
]xPy-j6C
/** ^GNL:D%6d
* @param data 36}&{A
* @param l V0xO:7G^
* @param i EAoq2_(`a
*/ NG?g(
private void insertSort(int[] data, int start, int len) { T>w;M?`9K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8Yf=)
} cC9haxW
} DK1{Z;Z
} %rO)w?
} 0~e6\7={
rN'}IS@5
堆排序： \{={{O
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package org.rut.util.algorithm.support; av~kF
cXK.^@du
import org.rut.util.algorithm.SortUtil; p MR4]G
" :V@AT
/** WTu!/J<\
* @author treeroot dte-2?%~j
* @since 2006-2-2 f |NXibmP
* @version 1.0 V5p->X2#
*/ IEY\l{s
public class HeapSort implements SortUtil.Sort{ r ?z}TtDp
S7b7zJ8A
/* (non-Javadoc) XV1XzG#C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `Dp4Z>| K
*/ f& Vx`oj
public void sort(int[] data) { &U\//
MaxHeap h=new MaxHeap(); qUk-BG8^
h.init(data); }O2P>Z?V
for(int i=0;i h.remove(); p ^Y2A
System.arraycopy(h.queue,1,data,0,data.length); b1yS1i D
} GjbOc
Kf`/ Gc!
private static class MaxHeap{ [Xww`OUsh
3e1%G#fu
void init(int[] data){ PoD/i@
this.queue=new int[data.length+1]; 3|D.r-Q
for(int i=0;i queue[++size]=data; I7W?}bR*6
fixUp(size); m,&2s-v
} a0's6C
} 4)Ew rU
5>h/LE]"
private int size=0; "8E=*2fcw
=.qPjp_Qd
private int[] queue; G$2Pny<!
9/{ 8Y&
public int get() { A@e!~
return queue[1]; Uurpho_~
} h{^MdYJ
"g5MltH
public void remove() { NT{'BJ
SortUtil.swap(queue,1,size--); zKThM#.Wa
fixDown(1); #)4p,H
} S~M/!Xb
file://fixdown ps*iE=D
private void fixDown(int k) { umt(e:3f5
int j; P>Ru
while ((j = k << 1) <= size) { @XVx{t;g2
if (j < size %26amp;%26amp; queue[j] j++; 6\? 2=dNX
if (queue[k]>queue[j]) file://不用交换 |(uo@-U
break; V-18~+F~"a
SortUtil.swap(queue,j,k); n!U1cB{
k = j; 6n H'NNS:J
} w I[Hoi V
} -c#vWuLl
private void fixUp(int k) { c_Iq!MH
while (k > 1) { ~;uU{TT
int j = k >> 1; B^.:dn
if (queue[j]>queue[k]) .g_^! t
break; 'l3 DP
SortUtil.swap(queue,j,k); # S0N`V
k = j; pL: r\Y:R
} SPnW8
} 0> QqsQ
9{%/I
} [-^xw1:
;X+cS,h
} ,M :j5
p{&o{+c
SortUtil： ek d[|g
xu@xP5GB^
package org.rut.util.algorithm; WA5.qw
#-l+cu{
import org.rut.util.algorithm.support.BubbleSort; =[0|qGzg
import org.rut.util.algorithm.support.HeapSort; q-S#[I+g
import org.rut.util.algorithm.support.ImprovedMergeSort; tO3#kV\,
import org.rut.util.algorithm.support.ImprovedQuickSort; 'fZ\uMdTx
import org.rut.util.algorithm.support.InsertSort; !E^\)=E)P
import org.rut.util.algorithm.support.MergeSort; XE#$|Z
import org.rut.util.algorithm.support.QuickSort; ycf)*0k
import org.rut.util.algorithm.support.SelectionSort; )U{\c2b
import org.rut.util.algorithm.support.ShellSort; hLT?aQLx
eL [.;_
/** $)6x3&]P
* @author treeroot 7_J0[C!G
* @since 2006-2-2 L#fK ,r8
* @version 1.0 mNJCV8 <
*/ 6UU<:KH
public class SortUtil { 0JW =RW
public final static int INSERT = 1; }4?z<.V
public final static int BUBBLE = 2; j%gle%_
public final static int SELECTION = 3; - x;xQ
public final static int SHELL = 4; n^<J@uC
public final static int QUICK = 5; k|$?b7)"@
public final static int IMPROVED_QUICK = 6; bpa'`sf
public final static int MERGE = 7; PmtXD6p3(
public final static int IMPROVED_MERGE = 8; Lc(eY{CY
public final static int HEAP = 9; [{zfI`6
M3eFG@,
public static void sort(int[] data) { bQdu=s[
sort(data, IMPROVED_QUICK); Rpj{!Ia
} #P {|7}jk
private static String[] name={ ;,xM*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" s\Ln
}; !Oi':OQG
2rHQ7
private static Sort[] impl=new Sort[]{ <KX+j,4
new InsertSort(), Nl^uA
new BubbleSort(), bnH:|-?q
new SelectionSort(), |<%v`*
new ShellSort(), }taG/kE62
new QuickSort(), 7@&kPh}PG
new ImprovedQuickSort(), ^_BjO(b'e
new MergeSort(), A>)Ced!
new ImprovedMergeSort(), RQ4+EW1G
new HeapSort() BadnL<cj]
}; BN6cu9a
DXZZZ[#
public static String toString(int algorithm){ L0Ajj=
return name[algorithm-1]; r6It)PQ
} :es=T`("A8
vVSf'w
public static void sort(int[] data, int algorithm) { li0)<("/
impl[algorithm-1].sort(data); t >Rh
} n*9nzx#q
Y/ %XkDC~
public static interface Sort { TY?O$d2b3
public void sort(int[] data); szD9z{9"y
} Az/B/BLB
_/YM@%d
public static void swap(int[] data, int i, int j) { xl9S=^`=
int temp = data; b&'YW*W
data = data[j]; #q5tG\gnM
data[j] = temp; ndw&F'.r
} 1?G%&X@ X
} Uy?X-"UR