[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; (?wKBUi
} Mo r-$a8
int i1=l; #`wfl9tj
int i2=mid+1; R.$Y1=U6
for(int cur=l;cur<=r;cur++){ D"aQbQP
if(i1==mid+1) 6j![m+vo%
data[cur]=temp[i2++]; l),13"?C(
else if(i2>r) 5 :>
data[cur]=temp[i1++]; v333z<<S
else if(temp[i1] data[cur]=temp[i1++]; I9&<:`
else / UBAQ8TR
data[cur]=temp[i2++]; DuZ]g#
} 0n^j 50Yq
} J=bOw//
WuXRL}!\,
} "2j~3aWj
vv_?ip:t
改进后的归并排序: ozwqK oE
r/:'}os;
package org.rut.util.algorithm.support; @TG~fJSA12
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import org.rut.util.algorithm.SortUtil; o: DnZN
I#e*,#'S
/** Mi-9sW
* @author treeroot +& Qqu`)?F
* @since 2006-2-2 }('QIvq2
* @version 1.0 6%axbB
*/ K?eo)|4)DB
public class ImprovedMergeSort implements SortUtil.Sort { g 0=t9J
+T;qvx6
private static final int THRESHOLD = 10; lK@r?w|<M
ai2}vR
/* t":>O0>cz
* (non-Javadoc) +}'K6x_
* "FD~XSRL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CtxK{:
*/ Pk2"\y@q/
public void sort(int[] data) { Z)4P>{
int[] temp=new int[data.length]; NE nP3A
mergeSort(data,temp,0,data.length-1); x&p=vUuukP
} w-/Tb~#E
}k~0R-m
private void mergeSort(int[] data, int[] temp, int l, int r) { ,PAKPX9v_F
int i, j, k; G_o4A:2
int mid = (l + r) / 2; 3".W
if (l == r) >?xVr
return; '1*MiFxKq
if ((mid - l) >= THRESHOLD) Dne&YVF9V
mergeSort(data, temp, l, mid); rbWFq|(_
else 1yf&ck1R
insertSort(data, l, mid - l + 1); H[oi? {L
if ((r - mid) > THRESHOLD) ?RyvM_(N6
mergeSort(data, temp, mid + 1, r); U:(t9NX b
else ?+_"2XY
insertSort(data, mid + 1, r - mid); (ZJ_&8C#
> [7vXm4
for (i = l; i <= mid; i++) { m 9Q{)?J7
temp = data; :eO0{JN4T
} Ha\hQ'99
for (j = 1; j <= r - mid; j++) { s=+G%B'
temp[r - j + 1] = data[j + mid]; rkp0ej2-
} I}{eYXh
int a = temp[l]; O%{>Zo_<
int b = temp[r]; ],m-,K
for (i = l, j = r, k = l; k <= r; k++) { eSf:[^
if (a < b) { U)6JJv
data[k] = temp[i++]; ]5CFL$_Q{
a = temp; ~*WbMA
} else { H2p;J#cv@
data[k] = temp[j--]; q3t@)+l>*
b = temp[j]; uWQ.h ,
} ==9Ez
} l0V@19Ec
} N*;/~bt7P
H(|v
/** #{a<{HX
* @param data qKXn=J/0tA
* @param l s,=^V/c
* @param i 7va%-&.&t
*/ )c_ll;%
private void insertSort(int[] data, int start, int len) { _\zfXHp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \/%mabLK
} k2a^gCBC
} CJ>=odK[
} O jmz/W
} G})mw
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堆排序： Ar_/9@n
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package org.rut.util.algorithm.support; ah.Kb(d:
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import org.rut.util.algorithm.SortUtil; NgQl;$
w6tY6bf}
/** A_+WY|#M
* @author treeroot X5=7DE]
* @since 2006-2-2 O)?0G$0
* @version 1.0 >'eqOZM
*/ el<nY"c
public class HeapSort implements SortUtil.Sort{ rkrt.B
*9PQJeyR
/* (non-Javadoc) 6 s/O\A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fr7/%{s
*/ }9JPSl28Jr
public void sort(int[] data) { }HzZj;O^2>
MaxHeap h=new MaxHeap(); 0ni5:tYy
h.init(data); R_&>iu'[
for(int i=0;i h.remove(); [S%
System.arraycopy(h.queue,1,data,0,data.length); t+VPX2
} _e W*
<f%9w]
private static class MaxHeap{ zq#o8))4X
\GN5Sy]r
void init(int[] data){ JqO( ]*"Hi
this.queue=new int[data.length+1]; $i hIHl6'
for(int i=0;i queue[++size]=data; C%&7,F7
fixUp(size); :>5]A6Wi
} ~tWBCq 6
} aNz%vbh\
RDbA"e5x
private int size=0; f{J7a1 `_
XN Y(@
private int[] queue; ME(!xI//JZ
+q(D]:@,[
public int get() { .T7ciD
return queue[1]; T &1sfS,
} E_z@\z MB
Zo`^pQS
public void remove() { )xeVoAg
SortUtil.swap(queue,1,size--); 7hc(]8eP
fixDown(1); t%%I.zIV7
} `u-}E9{
file://fixdown n\ZFPXP
private void fixDown(int k) { 5"sF#Y&
int j; ifkA3]
while ((j = k << 1) <= size) { 0-FbV,:;
if (j < size %26amp;%26amp; queue[j] j++; _i&\G}mrC
if (queue[k]>queue[j]) file://不用交换 (?Yz#Yf
break; LTF%bAQ,
SortUtil.swap(queue,j,k); al2v1.Y}
k = j; >wn&+%i&
} W^x[maz
} @1pdyKK
private void fixUp(int k) { B3D4fYQ
while (k > 1) { J]%P fWV
int j = k >> 1; `U1"WcN
if (queue[j]>queue[k]) f,$CiZ"
break; `4o;Lz~
SortUtil.swap(queue,j,k); &45.*l|mo
k = j; 9H<:\-:
} h(Z7a%_
} O;XF'r_
P _ SJK
} myYe~f4=HQ
9'tM65K
} mb#)w`<
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SortUtil： 6l=n&YO
:KFhryN
package org.rut.util.algorithm; 4]cOTXk9C
3K'3Xp@A
import org.rut.util.algorithm.support.BubbleSort; q/[)mr|~
import org.rut.util.algorithm.support.HeapSort; @cx!m
import org.rut.util.algorithm.support.ImprovedMergeSort; 6x{B
import org.rut.util.algorithm.support.ImprovedQuickSort; aRV<y8{9
import org.rut.util.algorithm.support.InsertSort; 1F=x~FMvY
import org.rut.util.algorithm.support.MergeSort; 6};Sn/8
import org.rut.util.algorithm.support.QuickSort; HdGy$m`
import org.rut.util.algorithm.support.SelectionSort; TiOvrp7B
import org.rut.util.algorithm.support.ShellSort; 9(C Ke,
a; "+Py
/** 5=dg4"b]
* @author treeroot !vsUL-
* @since 2006-2-2 0ul2rZc
* @version 1.0 Pvtf_Qo^
*/ ' ft |
public class SortUtil { >Nov9<p
public final static int INSERT = 1; R(:q^?
public final static int BUBBLE = 2; )a.U|[:y[+
public final static int SELECTION = 3; .8,lhcpY
public final static int SHELL = 4; !,\]> c
public final static int QUICK = 5; N=wB1gJ
public final static int IMPROVED_QUICK = 6; &W ~,q(
public final static int MERGE = 7; XW19hG
public final static int IMPROVED_MERGE = 8; 8mV35A7l
public final static int HEAP = 9; F4k`x/ak
^PDa
public static void sort(int[] data) { 0$UE|yDs>
sort(data, IMPROVED_QUICK); Z6Mh`:7
} al5?w{us
private static String[] name={ R4o_zwWgPw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" / og'W j
}; Fv3fad@x
#R)$nv:h?^
private static Sort[] impl=new Sort[]{ {C<ch@sR
new InsertSort(), L.8-nTg"y
new BubbleSort(), s)-=l_4T
new SelectionSort(), m\Dbb.vBvW
new ShellSort(), # wG}T .*
new QuickSort(), 2nwP-i
new ImprovedQuickSort(), (j'[t
new MergeSort(), .rS0zU
new ImprovedMergeSort(), E;+3VJ+F"
new HeapSort() <$UY{"?
}; O|8p #
X&K1>dgWP
public static String toString(int algorithm){ N[AX29
return name[algorithm-1]; . [C~a
} xL mo?Y*
fFsA[@5tul
public static void sort(int[] data, int algorithm) { 2"NJt9w
impl[algorithm-1].sort(data); ?gTY!;$P
} P2lj#aQLS
:imp~~L;
public static interface Sort { GU_R6Wt+
public void sort(int[] data); -{ZRk[>Z
} <Q%\pAP}b
$oh}!Smt
public static void swap(int[] data, int i, int j) { {| Tl3
int temp = data; D].1X0^hp
data = data[j]; w,^!kO0)~8
data[j] = temp; _PJd1P.k
} EKgTRRW
} HogT#BMs