[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; &eWnS~hJ
} #EIcP=1m4
int i1=l; fU^5Dl
int i2=mid+1; zI.:1(,
for(int cur=l;cur<=r;cur++){ iKAqM{(
if(i1==mid+1) FUs57 V
data[cur]=temp[i2++]; PQ(/1v
else if(i2>r) !X+}W[Ic^
data[cur]=temp[i1++]; 3'6by!N,d
else if(temp[i1] data[cur]=temp[i1++]; tiTh7qYi9
else /9SNXjfbt
data[cur]=temp[i2++]; Mb(hdS90
} c<imqDf
} gCv[AIE_m
\x=!'
} >W^)1E,Qh
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改进后的归并排序: & hv@ &
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package org.rut.util.algorithm.support; !c=EB`<*
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import org.rut.util.algorithm.SortUtil; 0oo*F
?EA&kZR]
/** ee#\XE=A
* @author treeroot qWb8"
* @since 2006-2-2 {|R +|ow
* @version 1.0 YbP}d&L
*/ h3z9}'
public class ImprovedMergeSort implements SortUtil.Sort { *M+CA_I(
:[bpMP<bz;
private static final int THRESHOLD = 10; xZ>@wBQ
0<42\ya
/* gutf[Ksu
* (non-Javadoc) ~ ve
* r,cK#!<%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [G7S
*/ 9DaoMOPEI
public void sort(int[] data) { -ei+r#
int[] temp=new int[data.length]; tq2TiXo%
mergeSort(data,temp,0,data.length-1); -59;Zn/
} ; 8u5
.oz(,$CS"
private void mergeSort(int[] data, int[] temp, int l, int r) { e\ O&Xe
int i, j, k; js)I%Z
int mid = (l + r) / 2; {z7kW@c
if (l == r) ?oQAxb&
return; yI8 /m|
if ((mid - l) >= THRESHOLD) Tizjh&*^
mergeSort(data, temp, l, mid); ^1`T_+#[s
else jn#Ok@tZ
insertSort(data, l, mid - l + 1); n/Dk~Q)
if ((r - mid) > THRESHOLD) `g:bvIV5x>
mergeSort(data, temp, mid + 1, r); 5g4xhYl70n
else TPWqiA?3Cp
insertSort(data, mid + 1, r - mid); k~pbXA*u
Nj`Miv o
for (i = l; i <= mid; i++) { uG7ll5Yy
temp = data; :hUt7/3c
} 9Q:}VpT~nG
for (j = 1; j <= r - mid; j++) { 8M7pc{
temp[r - j + 1] = data[j + mid]; 2jH&@g$cl;
} 9H,Ec,.
int a = temp[l]; Tg/rV5@ka
int b = temp[r]; 07A2@dx
for (i = l, j = r, k = l; k <= r; k++) { l5,}yTUta
if (a < b) { bb"x^DtT
data[k] = temp[i++]; ,[)f-FmcU
a = temp; uqK[p^{
} else { [C(>e0r
data[k] = temp[j--]; r+;AEN48
b = temp[j]; 19;F+%no#
} t$5)6zG
} D8wZC'7
} I>45xVA
q?Av5TFf
/** 'tun;Y
* @param data p$bR M`R&s
* @param l <!I^xo[
* @param i dJUI.!hv;
*/ `&qeSEs\
private void insertSort(int[] data, int start, int len) { ?\Lf=[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b'TkYa^
} 5.FAuzz
} {^SHIL
} !-Md+I_
} n<66 7 <
,: 4+hJ<q
堆排序： C}cYG
R#33ACCX
package org.rut.util.algorithm.support; F)4;:".zna
"uHU!)J#z
import org.rut.util.algorithm.SortUtil; 6sl2vHzA
=1h> N/VJ
/** OQa;EBO
* @author treeroot -H AUKY@;5
* @since 2006-2-2 HLp'^
* @version 1.0 S`Wau/7t
*/ 50^T\u
public class HeapSort implements SortUtil.Sort{ -MT.qhx
\[;Qqn0
/* (non-Javadoc) ]^?V8*zL]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b1frAA
*/ ^+q4*X6VB
public void sort(int[] data) { Z<n%~z^
MaxHeap h=new MaxHeap(); p_Y U!j_VE
h.init(data); Nlfz'_0M
for(int i=0;i h.remove(); L'$;;eM4
System.arraycopy(h.queue,1,data,0,data.length); (S#nA:E
} hNGD`"U
:h60
private static class MaxHeap{ _!C'oG6s?
T^n0=|
void init(int[] data){ |_`wC
this.queue=new int[data.length+1]; Hy0l"CA*|
for(int i=0;i queue[++size]=data; GJIM^
fixUp(size); 0I \l_St@
} #ysSfM6
} 8lcB.M
e x`mu E
private int size=0; >ISN2Kn
>;zQ.2*
private int[] queue; hp)k[|u;
3# r`e
public int get() { R=u!RcvR
return queue[1]; <zE~N~;
} C'Z6l^{>
X6lUFko
public void remove() { 0R[onPU_vZ
SortUtil.swap(queue,1,size--); d ,!sZ&v
fixDown(1); [_,Gk]F=
} z'd*z[L~
file://fixdown NamO5(1C
private void fixDown(int k) { !JC!GS"M5
int j; Mk$Pt
while ((j = k << 1) <= size) { %K|+4ZY3
if (j < size %26amp;%26amp; queue[j] j++; ;H:+w\?8f$
if (queue[k]>queue[j]) file://不用交换 >Lrud{
break; Y<oDv`aZ0
SortUtil.swap(queue,j,k); T~(AXwaJ
k = j; S6pvbaMZ
} yM-3nwk
} Oe:_B/l
private void fixUp(int k) { f))'8
while (k > 1) { C.}Vm};M
int j = k >> 1; U>jLh57
if (queue[j]>queue[k]) \:D'u<8E
break; 2or!v^^u
SortUtil.swap(queue,j,k); M~k2Y$}R
k = j; 4ZN&Yf`
} js<}>wD7<
} Msea kF
G'qGsKf\
} ;]+p>p-#
x9{&rldC
} *)4`"D
voAen&>!
SortUtil： s@c.nT%BYL
,Xt!dT-
package org.rut.util.algorithm; zBd)E21H
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import org.rut.util.algorithm.support.BubbleSort; ]t|-
import org.rut.util.algorithm.support.HeapSort; 1}"PLq(
import org.rut.util.algorithm.support.ImprovedMergeSort; x%\m/_5w%
import org.rut.util.algorithm.support.ImprovedQuickSort; Kgw_c:/'
import org.rut.util.algorithm.support.InsertSort; K!a4>Du{
import org.rut.util.algorithm.support.MergeSort; xp<p(y8e1d
import org.rut.util.algorithm.support.QuickSort; DeTD.)pS
import org.rut.util.algorithm.support.SelectionSort; ;$= GrR
import org.rut.util.algorithm.support.ShellSort; |w7D&p$
~'aK[3
/** V0!.>sX9
* @author treeroot g=)djXW
* @since 2006-2-2 AJ`R2 $
* @version 1.0 |?KdQeL
*/ h-`*S&mZ
public class SortUtil { WOaj_o
public final static int INSERT = 1; hd E?%A
public final static int BUBBLE = 2; gQ@fe3[
public final static int SELECTION = 3; [hT|]|fJS;
public final static int SHELL = 4; o/Cu^[an
public final static int QUICK = 5; kbF+aS
public final static int IMPROVED_QUICK = 6; NDv_@V(D
public final static int MERGE = 7; )Ap0" ?q
public final static int IMPROVED_MERGE = 8; sF=8E8qa
public final static int HEAP = 9; GE0,d
etHkyF
public static void sort(int[] data) { A_vf3 *q
sort(data, IMPROVED_QUICK); x\m?*5p
} r-+S^mOE]
private static String[] name={ 9/x_p;bI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N=X(G(
}; R:LThFx
4:Bpz;x
private static Sort[] impl=new Sort[]{ ~>]/1JFz
new InsertSort(), WKwU:im
new BubbleSort(), m{)F9F
new SelectionSort(), h+rrmC
new ShellSort(), e%O]U:Z
new QuickSort(), j;+!BKWy4
new ImprovedQuickSort(), Ea7LPHE#
new MergeSort(), 4xE [S
new ImprovedMergeSort(), STxreW1
new HeapSort() (Z72 3)
}; AX= 4{b'
a#qC.,$A
public static String toString(int algorithm){ edW:(19}
return name[algorithm-1]; TnvX&Y'
} <RMrp@[
5yhfCe m|
public static void sort(int[] data, int algorithm) { Q41eYzAi
impl[algorithm-1].sort(data); YdI&OzaroE
} w u
u0vq`5L
public static interface Sort { :$#";t|
public void sort(int[] data); jPjFp35;zb
} Td`0;R'<}c
dGrm1w
public static void swap(int[] data, int i, int j) { 8+irul{H_
int temp = data; = +=k(*
data = data[j]; vV?=r5j
data[j] = temp; B[I a8t
} X~Yj#@
} >,v,4,c