[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; &hI>L
} 333u]
int i1=l; &dRjqn^&X
int i2=mid+1; =&2$/YX0D
for(int cur=l;cur<=r;cur++){ ;g9%&
if(i1==mid+1) E?Cj/o
data[cur]=temp[i2++]; J)*8|E9P
else if(i2>r) s`c?:
data[cur]=temp[i1++]; j=W@P-
else if(temp[i1] data[cur]=temp[i1++]; C`0%C7
else |{f~Ks%
data[cur]=temp[i2++]; VjB*{,
} kwlC[G$j7
} #V[SQ=>x[
| ]# +v@
} C_G1P)k
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改进后的归并排序: JT)k
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package org.rut.util.algorithm.support; pds*2p)2
:tLbFW[
import org.rut.util.algorithm.SortUtil; U Du~2%
HN68!v}C|
/** cy3M^_5B<
* @author treeroot fK_~lGY(
* @since 2006-2-2 ;Iq5|rzDn
* @version 1.0 K_#UZA< Y
*/ uNbIX:L,
public class ImprovedMergeSort implements SortUtil.Sort { {y6C0A*
5 `=KyHi:b
private static final int THRESHOLD = 10; t77'fm
Ea]T>4
/* =/9<(Tt%m
* (non-Javadoc) @.ZL7$|d
* io2@}xZF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oy5+}`
*/ L/x(RCD
public void sort(int[] data) { Cs4hgb|
int[] temp=new int[data.length]; h0Jl_f#Y
mergeSort(data,temp,0,data.length-1); }9CrFTbx;
} ([KN*OF
XWtiwf'K
private void mergeSort(int[] data, int[] temp, int l, int r) { El (/em
int i, j, k; 8l23%iWxe
int mid = (l + r) / 2; JZ=5Bpw
if (l == r) {ma;G[!
return; 4SR(->@
if ((mid - l) >= THRESHOLD) g1@wf
mergeSort(data, temp, l, mid); bSrZ{l
else ]"sRS`0+
insertSort(data, l, mid - l + 1); v[&'k\
if ((r - mid) > THRESHOLD) ,I`_F,
mergeSort(data, temp, mid + 1, r); tD-gc''H
else _whF^g8
insertSort(data, mid + 1, r - mid); |<(t}}X
Spgg+;9
for (i = l; i <= mid; i++) { B 8{ uR
temp = data; M|r8KW~S)
} i03gX<=*
for (j = 1; j <= r - mid; j++) { t`u!]DHv
temp[r - j + 1] = data[j + mid]; d>!p=O`>{q
} {/ &B!zvl
int a = temp[l]; h8=h >W-
int b = temp[r]; 9j#@p
for (i = l, j = r, k = l; k <= r; k++) { A[H;WKn0
if (a < b) { C9jbv/c
data[k] = temp[i++]; 0H[LS
a = temp; _7@z_i_c
} else { ^i`*Wm@!
data[k] = temp[j--]; h|p[OecG
b = temp[j]; R1'`F{56
} ?N>pZR
} e{C6by"j{S
} 2EfflZL3
"HC)/)Mv@
/** c7qwNs*f
* @param data [H,u)8)
* @param l RrWNJ&o
* @param i vg(K$o{BT
*/ maDz W_3
private void insertSort(int[] data, int start, int len) { *#2Rvt*Ox
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); O,mip
} Of`c`-<j
} &N\[V-GP2G
} 0=;YnsY
} N E= w6
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堆排序： o.^y1mH'
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package org.rut.util.algorithm.support; };sMU6e
~E*d G
import org.rut.util.algorithm.SortUtil; V`k8j-*s
r7I B{}>-
/** l h/&__
* @author treeroot M<[?g5=#
* @since 2006-2-2 CgnXr/!L
* @version 1.0 xK;e\^v
*/ "^%Z'ou
public class HeapSort implements SortUtil.Sort{ (p |DcA]BX
h\y-L~2E
/* (non-Javadoc) ut5yf$%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BXhWTGiG
*/ o~C('1Fdb
public void sort(int[] data) { U CY2]E
MaxHeap h=new MaxHeap(); )#`H."Z
h.init(data); \+Y!ILOI
for(int i=0;i h.remove(); GDPo`#~
System.arraycopy(h.queue,1,data,0,data.length); HFS+QwHW
} jvs[ /
6c<ezEJ
private static class MaxHeap{ Q6^x8
;&?pd"^<_Z
void init(int[] data){ A/ 0qk
this.queue=new int[data.length+1]; J_ J+cRwq
for(int i=0;i queue[++size]=data; [xdj6W
fixUp(size); - DL"-%X.
} f=I:DkR
} ~O4|KY
~L4eZ
private int size=0; D;js.ZF
Fu)Th|5GZ
private int[] queue; -&Gfh\_NW
hz)9"B\S
public int get() { f\K#>u* Q
return queue[1]; @vs@>CYdz
} ~7SH4Cr
J70D+
public void remove() { >o[|"oLO
SortUtil.swap(queue,1,size--); bPd-D-R
fixDown(1); X~RH^VYv
} vWY(%Q,
file://fixdown -<W2PY<
private void fixDown(int k) { O9]\Q@M.
int j; `6Hf&u<
while ((j = k << 1) <= size) { 97!5Q~I
if (j < size %26amp;%26amp; queue[j] j++; km\%BD~
if (queue[k]>queue[j]) file://不用交换 nNn56&N]
break; fk3kbdI
SortUtil.swap(queue,j,k); 8/Rm!.8+~
k = j; c8DZJSO
} `ROEV~
} [7W(NeMk
private void fixUp(int k) { \&q=@rJp(z
while (k > 1) { .3wY\W8Dr-
int j = k >> 1; o3h-=t
if (queue[j]>queue[k]) @{}rG8
break; 3jPB#%F
SortUtil.swap(queue,j,k); >oqZ !V5[
k = j; |9,UaA
} Z> 74.r
} p`>d7S>"
QN G&
} *fhX*e8y
B\_[R'Pf&
} FH\CK
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SortUtil： DO^y;y>
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package org.rut.util.algorithm; xm^95}80yh
nj2gs,k
import org.rut.util.algorithm.support.BubbleSort; h>3H7n.
import org.rut.util.algorithm.support.HeapSort; Hj~O49%j&
import org.rut.util.algorithm.support.ImprovedMergeSort; 9<cOYY
import org.rut.util.algorithm.support.ImprovedQuickSort; N@1p]\
import org.rut.util.algorithm.support.InsertSort; SrZ50Se
import org.rut.util.algorithm.support.MergeSort; 6?SFNDQ"C
import org.rut.util.algorithm.support.QuickSort; g6euXI
import org.rut.util.algorithm.support.SelectionSort; v0 ];W|
import org.rut.util.algorithm.support.ShellSort; m6U8)!)T
s~$zWx@v
/** =`p&h}h-L
* @author treeroot dlD}Ub
* @since 2006-2-2 :p-Y7CSSu
* @version 1.0 iJP{|-h
*/ K`4GU[ul
public class SortUtil { }gCHQ;U7`
public final static int INSERT = 1; yJ/#"z=h?
public final static int BUBBLE = 2; #s+Q{2s
public final static int SELECTION = 3; %#k,6;m
public final static int SHELL = 4; #x~_`>mDN
public final static int QUICK = 5; _^T}_
public final static int IMPROVED_QUICK = 6; yGEb7I$h
public final static int MERGE = 7; }O*WV1
public final static int IMPROVED_MERGE = 8; V/bH^@,sA
public final static int HEAP = 9; IJPgFZ7
se,Z#H
public static void sort(int[] data) { 9} *$n&B
sort(data, IMPROVED_QUICK); ~3=2=Uf
} /DU*M,
private static String[] name={ JEHK:1^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" qG9qN.|dC
}; ma]? )1<{
oVkr3KZ
private static Sort[] impl=new Sort[]{ p>p'.#M
new InsertSort(), oh\1>3,Ns
new BubbleSort(), c{>|o
new SelectionSort(), (,LL[&;:
new ShellSort(), 'F5)ACA%
new QuickSort(), :]c=pH
new ImprovedQuickSort(), NG9vml
new MergeSort(), d@g2k> >
new ImprovedMergeSort(), #F4X}
new HeapSort() |s|/]aD}o
}; e2Jp'93o'
!6E:5=L^
public static String toString(int algorithm){ dS$ji#+d$
return name[algorithm-1]; AZwa4n}"
} HV\"T(89
1nB@zBQu-
public static void sort(int[] data, int algorithm) { Yy@g9mi
impl[algorithm-1].sort(data); /=ylQn3 *
} q\H7&w
bi,mM,N/
public static interface Sort { f)^t')
public void sort(int[] data); 1Z:R,\+L
} fuyl/bx}
b-nYxd
public static void swap(int[] data, int i, int j) { b *9-}g:
int temp = data; c[{UI
data = data[j]; {^wdJZ~QLK
data[j] = temp; XRa#21pQ
} A& =pw#
} la702)N{