[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; >@wyiBU
} hAv.rjhw_
int i1=l; _k2*2db
int i2=mid+1; nFY6K%[
for(int cur=l;cur<=r;cur++){ VQ((c:+!
if(i1==mid+1) oD>j26Q
data[cur]=temp[i2++]; VLO!hA#
else if(i2>r) q=(.N>%
data[cur]=temp[i1++]; 5<?s86GHh'
else if(temp[i1] data[cur]=temp[i1++]; |'" 17c&
else @ATJ|5.gr
data[cur]=temp[i2++]; )`B n"=
} uy^vQ/
} KoL3CA"N
p{BBqKv
} FqT2+VO~
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改进后的归并排序: Zn]njf1x
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package org.rut.util.algorithm.support; 5$w`m3>i(
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import org.rut.util.algorithm.SortUtil; {D9m>B3"{
~KF>Jow?Y
/** 7xr@$-U
* @author treeroot w;Jby
* @since 2006-2-2 ;)nV
* @version 1.0 ~xSAR;8
*/ ollk {N
public class ImprovedMergeSort implements SortUtil.Sort { sq~9 l|F
A:-r2;xB
private static final int THRESHOLD = 10; quEP"
lE@ V>%b
/* d}`Z| ex
* (non-Javadoc) 8Q2qroT
* a.O pxd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p^uX{!
*/ R<GnPN:c
public void sort(int[] data) { G$)f5_]7{
int[] temp=new int[data.length]; >PBP:s1f4>
mergeSort(data,temp,0,data.length-1); eVy>
} $x'p+&n\
!QTfQ69Y0
private void mergeSort(int[] data, int[] temp, int l, int r) { ;@R=CQ6
int i, j, k; 2GRdfX
int mid = (l + r) / 2; qB0F9[U
if (l == r) 6~@S,i1
return; Cj6+zJ
if ((mid - l) >= THRESHOLD) 8:)W!tr
mergeSort(data, temp, l, mid); ,fa'
else 2[8C?7_K0?
insertSort(data, l, mid - l + 1); }KZt7)
if ((r - mid) > THRESHOLD) |)vC^=N{+
mergeSort(data, temp, mid + 1, r); 2sryhS'(H
else f1_b``M
insertSort(data, mid + 1, r - mid); yK3b^
6|-V{
for (i = l; i <= mid; i++) { L~PBD?l
temp = data; j~Cch%%G
} <HC5YA)4
for (j = 1; j <= r - mid; j++) { w#!^wN
temp[r - j + 1] = data[j + mid]; I\DH
} XFiP8aX<
int a = temp[l]; &=-ZNWNo
int b = temp[r]; qlJzXq{|`
for (i = l, j = r, k = l; k <= r; k++) { (WISf}[l;
if (a < b) { z9B""ws
data[k] = temp[i++]; bkvm-$/
a = temp; ^-&BGQM
} else { :p@.aD5
data[k] = temp[j--]; &Oih#I
b = temp[j]; VoTnm
} bz1+AJG
} kU {>hG4
} 5@kNvi
oXxY$x*R1
/** \[57Dmo
* @param data ,R~{$QUl
* @param l k)t_U3i
* @param i 9 Y-y?Y
*/ J:!m49fF
private void insertSort(int[] data, int start, int len) { p!OCF]r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); abW[hp
} ruKm_j#J
} |*T3TsP u
} ~g|Z6-?4Jj
} RiPxz=kr
1#D&cx6
堆排序： %\|9_=9Wn
Us.")GiHE
package org.rut.util.algorithm.support; ~mR@L`"l
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import org.rut.util.algorithm.SortUtil; ;tZ;C(;<
UCz\SZ{za
/** }^@Q9<P^E
* @author treeroot iaAj|:
* @since 2006-2-2 IOjp'6Yr
* @version 1.0 5x=aJl;G
*/ @5rl;C
public class HeapSort implements SortUtil.Sort{ s IE2a0+
!*tV[0i2
/* (non-Javadoc) '<JNS8h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D["~G v
*/ E0s|eA&
public void sort(int[] data) { Oe/&Ryj=mm
MaxHeap h=new MaxHeap(); g"dq;H
h.init(data); hp$/O4fD
for(int i=0;i h.remove(); .yF@Ow
System.arraycopy(h.queue,1,data,0,data.length); cOq'MDr
} 0'3f^Ajf
&&daQg4Ha
private static class MaxHeap{ nhu;e}[>
c&mLK1A6
void init(int[] data){ L/Ytkag
this.queue=new int[data.length+1]; WCdl 25L#
for(int i=0;i queue[++size]=data; o _G,Ph!7
fixUp(size); (qbL=R"
} !<8-juY
} T@4R|P&{)
_&wrA3@/L
private int size=0; Z"pCDW)
[B,w\PLub
private int[] queue; l+vD`aJ3
wqnHaWd*
public int get() { 6${=N}3Kw
return queue[1]; ^vHh*Ub
} MP3Vo|}3
i!a.6Gq
public void remove() { b4R;#rm
SortUtil.swap(queue,1,size--); 3OlXi9>3
fixDown(1); z]%c6ty
} I,lX;~xb
file://fixdown u^4$<fd
private void fixDown(int k) { (2J\o
int j; JqmxS*_P
while ((j = k << 1) <= size) { n6xJ
if (j < size %26amp;%26amp; queue[j] j++; HVHd@#pDZ
if (queue[k]>queue[j]) file://不用交换 V'q?+p] a
break; _u{z$;
SortUtil.swap(queue,j,k); 3T= ?!|e
k = j; ;(3!#4`q(]
} )z^NJ'v4(
} lZr}F.7
private void fixUp(int k) { kdP*{
while (k > 1) { V"Sa9P{y"
int j = k >> 1; !0Mx Bem
if (queue[j]>queue[k]) -\9K'8 C
break; EEn8]qJC
SortUtil.swap(queue,j,k); @"G+kLv0
k = j; $VxKv7:
} GiK4LJ~cH)
} E~y(@72)
Vm*E^ v
} >lV'}0u)
Nrn_Gy>|D
} ;Zy[2M
q21l{R{Y
SortUtil： QMhvyzkS
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package org.rut.util.algorithm; ^7SE2Zi
A`:a T{j
import org.rut.util.algorithm.support.BubbleSort; W5Uw=!LdEY
import org.rut.util.algorithm.support.HeapSort; =o5|W'>`
import org.rut.util.algorithm.support.ImprovedMergeSort; `PUGg[Zx^
import org.rut.util.algorithm.support.ImprovedQuickSort; UasU/Q <
import org.rut.util.algorithm.support.InsertSort; W>j@E|m$
import org.rut.util.algorithm.support.MergeSort; t}YT+S
import org.rut.util.algorithm.support.QuickSort; &e6!/y&
import org.rut.util.algorithm.support.SelectionSort; ^?8/9o
import org.rut.util.algorithm.support.ShellSort; ;EB^1*AEw
`oU|U!|
/** dLfB){>S
* @author treeroot KK}ox%j
* @since 2006-2-2 kK|D&Xy`
* @version 1.0 3`TD>6rs
*/ )kT.3 Q
public class SortUtil { {ldt/dl~
public final static int INSERT = 1; bP Q=88*
public final static int BUBBLE = 2; 6E#znRi6IE
public final static int SELECTION = 3; dSI<s^n
public final static int SHELL = 4; 6]sP"
public final static int QUICK = 5; WS ^,@>A
public final static int IMPROVED_QUICK = 6; f.Y [2b
public final static int MERGE = 7; TjE'X2/
public final static int IMPROVED_MERGE = 8; ,rS?^"h9
public final static int HEAP = 9; *>h|<|T'
P?ms^
public static void sort(int[] data) { 4Ql9VM%y
sort(data, IMPROVED_QUICK); Y:R*AOx
} ni85Ne$
private static String[] name={ IG Ax+3V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }a%1$>sj
}; GO)5R,
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private static Sort[] impl=new Sort[]{ ph$vP;}
new InsertSort(), bO` SBq$
new BubbleSort(), @h9QfJ_f
new SelectionSort(), DF>3)oTF
new ShellSort(), 4a=QTq0p
new QuickSort(), aka)#0l .
new ImprovedQuickSort(), FP'-=zgc
new MergeSort(), Xp.$FJ1)
new ImprovedMergeSort(), w{*PZb4
new HeapSort() \(MIDCZ@-
}; ^ -4~pDv^
Q2!5
public static String toString(int algorithm){ A5T&i]
return name[algorithm-1]; );zLgNx,
} !z1\#|>
nb.|^O?
public static void sort(int[] data, int algorithm) { -wT!g;v;%
impl[algorithm-1].sort(data); ` {qt4zd0
} .I?~R:(Ig
CTS1."kx1
public static interface Sort { q BIekQT
public void sort(int[] data); \n`/?\r.z
} PthgxB^
Z2t\4|wr:
public static void swap(int[] data, int i, int j) { f`)*bx
int temp = data; #W&o]FAA3y
data = data[j]; O7CW#F
data[j] = temp; *M)M!jTv
} }K5okxio
} 6e8 gFQ"w2