[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; +td<{4oq8
} F+m[&MKL
int i1=l; b(l0js
int i2=mid+1; C6|(ktt
for(int cur=l;cur<=r;cur++){ >L gVj$Z
if(i1==mid+1) X1oGp+&
data[cur]=temp[i2++]; !DPF7x(-{
else if(i2>r) 61} i5o
data[cur]=temp[i1++]; /t*YDWLg
else if(temp[i1] data[cur]=temp[i1++]; OiF{3ae(
else i\)3l%AK]T
data[cur]=temp[i2++]; Ql8bt77eI-
} );Z]SGd
} B8H75sz
YGp)Oy}:
} bHE7yv [
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改进后的归并排序: dy2rkV.z
NgVR,G|1
package org.rut.util.algorithm.support; R(G\wqHUT3
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import org.rut.util.algorithm.SortUtil; ?sXG17~Bm
=\Iu$2r`
/** z<B CLP
* @author treeroot ='}#`',
* @since 2006-2-2 RP! X8~8
* @version 1.0 yzR=A%V8A
*/ id?"PD"%
public class ImprovedMergeSort implements SortUtil.Sort { *)'Vvu<
[k$efwJ
private static final int THRESHOLD = 10; =xL)$DTg)
_7"5wB?|+
/* /aYpIMi9}
* (non-Javadoc) RF?DtNuq
* L&kr{7q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X`:'i?(yj
*/ <^8*<;PaG
public void sort(int[] data) { 4r&f%caU
int[] temp=new int[data.length]; XN#&NT{t}
mergeSort(data,temp,0,data.length-1); +BL{@,zr
} $ J1f.YE
sZg6@s=
private void mergeSort(int[] data, int[] temp, int l, int r) { ;JT(3yK4>p
int i, j, k; &w85[zs
int mid = (l + r) / 2; D//=m=
if (l == r) !:3.D,
return; &eQJfc\a
if ((mid - l) >= THRESHOLD) O("Uq../3
mergeSort(data, temp, l, mid); .Q* 'r&n
else gmP9j)V6
insertSort(data, l, mid - l + 1); 19t{|w<
if ((r - mid) > THRESHOLD) z)-c#F@%
mergeSort(data, temp, mid + 1, r); W2]TRO
else @0NJ{
insertSort(data, mid + 1, r - mid); |yKud
&;c>O
for (i = l; i <= mid; i++) { )h_8vO2
temp = data; (dqCa[
} =-#G8L%Q
for (j = 1; j <= r - mid; j++) { QR0(,e$Dl
temp[r - j + 1] = data[j + mid]; h/)_) r.x
} asVX82<
int a = temp[l]; hH>``gK
int b = temp[r]; G$bJ+
for (i = l, j = r, k = l; k <= r; k++) { !yJICjXj
if (a < b) { wRvb8F0
data[k] = temp[i++]; 3@<zg1.9-
a = temp; 0N;%2=2_E
} else { -SCM:j%h
data[k] = temp[j--]; ~F!,PM/
b = temp[j]; H:QhrL+7_
} Z>P*@S,6G
} $_Nf-:D*
} w0lT%CPx
fCw*$:O
/** ;11x"S
* @param data ru9zTZZD
* @param l vScjq5"p
* @param i r!GW=u'
*/ 8b(!k FxD
private void insertSort(int[] data, int start, int len) { f&KdlpxKv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,$lemH1d
} i=S~(gp
} &,:h)
} `A@w7J'
} 9902+pW
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堆排序： EGVM)ur
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package org.rut.util.algorithm.support; ?C-Towo=i
78 f$6J q
import org.rut.util.algorithm.SortUtil; kz}R[7
U7h(`b
/** 3gEMRy*+
* @author treeroot 9=`Wp6Gmn
* @since 2006-2-2 p@ NaD=9
* @version 1.0 pzZk\-0R
*/ YJV%a
public class HeapSort implements SortUtil.Sort{ .a'f|c6
7gF"=7{-
/* (non-Javadoc) yx38g ca
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zeb=8Dg :
*/ tq1CwzRX
public void sort(int[] data) { > L2HET
MaxHeap h=new MaxHeap(); _}xd}QW
h.init(data); I:cg}JZ>|
for(int i=0;i h.remove(); Yf@e=:
System.arraycopy(h.queue,1,data,0,data.length); L{-LX=G^
} =c.5874A`
fWnD\mx?0
private static class MaxHeap{ ]6r;}1c
zi9[)YqxPH
void init(int[] data){ g4p
this.queue=new int[data.length+1]; ]}|byo
for(int i=0;i queue[++size]=data; SRIA*M.B}
fixUp(size); ypOLp SYk
} kYzKU2T\W
} >Gml4vGK
%QmxA 7fW
private int size=0; Zdc63fllM
W,5Hx1z R
private int[] queue; W !w,f;
XRx+Dddt;
public int get() { T;TA7{B
return queue[1]; @gC=$A#
} l e4?jQQ@L
+ZMls [
public void remove() { @mP]*$00
SortUtil.swap(queue,1,size--); RGKYW>$0RR
fixDown(1); )Z 9E=%
} 8Me:Yp_Xt
file://fixdown [epi#]m
private void fixDown(int k) { *a;@*
int j; % 2$/JZ
while ((j = k << 1) <= size) { >{gPN"S"a
if (j < size %26amp;%26amp; queue[j] j++; S8[=S
if (queue[k]>queue[j]) file://不用交换 Dl(3wgA
break; ^DeERB
SortUtil.swap(queue,j,k); R0ID2:i]F
k = j; 58\&/lYW
} XR2~Q)@
} TxjYrzC
private void fixUp(int k) { nRL. ppUI
while (k > 1) { 6tHO!`}1
int j = k >> 1; M5nWVK7c
if (queue[j]>queue[k]) )c n+1R
break; (wIzat
SortUtil.swap(queue,j,k); )a9 ]US^
k = j; >(uZtYM\j
} y&}E~5O
} *4+3ObA
Vtc36-\1*
} %VYAd)gC
x-OA([;/
} f=C,e/sw
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SortUtil： wO ?+Nh
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package org.rut.util.algorithm; kpL@P oQ/r
];'v8)Y
import org.rut.util.algorithm.support.BubbleSort; \%PaceH
import org.rut.util.algorithm.support.HeapSort; 1XM^8 .;
import org.rut.util.algorithm.support.ImprovedMergeSort; ku$$ 1xq
import org.rut.util.algorithm.support.ImprovedQuickSort; Ya>oCr}K
import org.rut.util.algorithm.support.InsertSort; Gj"7s8(/K|
import org.rut.util.algorithm.support.MergeSort; t!*+8Q!e
import org.rut.util.algorithm.support.QuickSort; d\x7Zw>
import org.rut.util.algorithm.support.SelectionSort; 'WaPrCw@Mf
import org.rut.util.algorithm.support.ShellSort; FZ!`B]]le,
O"Ku1t!
/** bM8If"
* @author treeroot mPI8_5V8]
* @since 2006-2-2 5N%93{L
* @version 1.0 )*4fzo
*/ /}Jj
public class SortUtil { ono4U.C9
public final static int INSERT = 1; PH"n{lW.T
public final static int BUBBLE = 2; 5>BK%`
public final static int SELECTION = 3; >2bKSh
public final static int SHELL = 4; PV|uPuz
public final static int QUICK = 5; [2"<W!p
public final static int IMPROVED_QUICK = 6; T]2q?;N
public final static int MERGE = 7; :'#TCDlOb
public final static int IMPROVED_MERGE = 8; TXe$<4"
public final static int HEAP = 9; XsnF~)YW
LPMU8Er
public static void sort(int[] data) { J[f;Xlh
sort(data, IMPROVED_QUICK); :0s]U_h
} x|yEtO&
private static String[] name={ .e=C{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A.hd Kl
}; 1V8-^
{?'fyEeg
private static Sort[] impl=new Sort[]{ R|wGU)KEc'
new InsertSort(), N[kwO1
new BubbleSort(), iD<(b`S
new SelectionSort(), 3p0LN'q]A
new ShellSort(), %Gt.m
new QuickSort(), J,Ks0MA
new ImprovedQuickSort(), _YcA+3ZL
new MergeSort(), f=)2f=
new ImprovedMergeSort(), (SKVuR%Jj
new HeapSort() aN"DkUYZM
}; H$I=W>;
L!=QR8?@E
public static String toString(int algorithm){ ~gGZmTb
return name[algorithm-1]; 4:U?u
} BJ% eZ.
! u:Weoz
public static void sort(int[] data, int algorithm) { qUly\b 47
impl[algorithm-1].sort(data); 7Hm3;P.
} (V4 ~`i4V
&hRvol\J
public static interface Sort { xO-+i\ ZV
public void sort(int[] data); y~)1 1]'>
} =JJL[}a|
liXdNk8
public static void swap(int[] data, int i, int j) { wE~V]bmtW
int temp = data; ;qrB\j"
data = data[j]; Dk?\)lD`
data[j] = temp; 4'0Dr++
} qK)73eNSR
} 66fO7OJs