[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; c{D<+XM
} ]S?G]/k}
int i1=l; 2.);OFk+
int i2=mid+1; 7?k3jDK
for(int cur=l;cur<=r;cur++){ W=S^t_F
if(i1==mid+1) ^oC>,%7
data[cur]=temp[i2++]; qrOesSdc
else if(i2>r) j3w~2q"r
data[cur]=temp[i1++]; ~IO'"h'w
else if(temp[i1] data[cur]=temp[i1++]; &=%M("IlD
else ;A"i.:ZT
data[cur]=temp[i2++]; q2B'R
} wH=7pS"s
} b?Q$UMAbH
w(+L&IBC
} ?en-_'}~a
'^7Z]K<v
改进后的归并排序: ||cI~qg
ScInOPb'K
package org.rut.util.algorithm.support; 4>Ht_B<<
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import org.rut.util.algorithm.SortUtil; ,{iMF (Nj
po]<sB
/** g] IPNW^n
* @author treeroot =Ldf#8J
* @since 2006-2-2 p|0SA=?k"
* @version 1.0 >3p8o@:
*/ *hFJI9G
public class ImprovedMergeSort implements SortUtil.Sort { UDkH'x$=
+('xzW
private static final int THRESHOLD = 10; e5FF'~A%]
s;Zi
/* 56C'<#
* (non-Javadoc) _8`S&[E?
* P%w!4v~"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |,.1=|&u
*/ ~|{e"!(}
public void sort(int[] data) { g p|G q
int[] temp=new int[data.length]; V.Lk70 \
mergeSort(data,temp,0,data.length-1); @Py'SH!-
} I)%bOK]
g rQ,J
private void mergeSort(int[] data, int[] temp, int l, int r) { Rdj3dg'<
int i, j, k; rf^IJY[
int mid = (l + r) / 2; 's"aPqF?
if (l == r) 0 >(hiTy<
return; W1M Bk[:Q
if ((mid - l) >= THRESHOLD) 4ee-tKH
mergeSort(data, temp, l, mid); 0Iyb}
else '|tmmoY6a:
insertSort(data, l, mid - l + 1); 7we='L&R
if ((r - mid) > THRESHOLD) /8dRql-Ne
mergeSort(data, temp, mid + 1, r); M>BVnB_,-
else ms&5Bq+9
insertSort(data, mid + 1, r - mid); KxJDAP
|a0@4 :
for (i = l; i <= mid; i++) { p4uObK,
temp = data; iy8Ln,4z(
} %&'[? LXD
for (j = 1; j <= r - mid; j++) { aJs! bx>K
temp[r - j + 1] = data[j + mid]; A i#~Eu*
} FhEfW7]0,
int a = temp[l]; [W'2z,S`WD
int b = temp[r]; 'OhGSs|
for (i = l, j = r, k = l; k <= r; k++) { b9Eb"
if (a < b) { =.`e4}u \X
data[k] = temp[i++]; W$D:mw7
a = temp; ZS&+<kGD
} else { bI;u};v
data[k] = temp[j--]; XaU^^K
b = temp[j]; o|s|Wmx>u
} 8RZqoQDH
} Q`=d5Uvw
} ?|hYtV
[].euDrX
/** RbA.&=3
* @param data )DQcf]I
* @param l (f"LD8MJ/
* @param i L1SZutWD?
*/ );p:[=$71
private void insertSort(int[] data, int start, int len) { u3 4.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K[-G2
} 5cr\ JR
} )\izL]=!t
} %x^U3"7
} g`=Z%{z%
M"OCwBTU
堆排序： %wq;<'W
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package org.rut.util.algorithm.support; ^ -lWv
.k5&C/jv
import org.rut.util.algorithm.SortUtil; S]c&T`jx
`y&2Bf
/** T' )l
* @author treeroot s%zdP
* @since 2006-2-2 \-Q6z8
* @version 1.0 (=Lx9-u
*/ 40;4=
public class HeapSort implements SortUtil.Sort{ <q4<3A
}K 2fwE
/* (non-Javadoc) |s !7U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W_]onq6
*/ [Al}GM
public void sort(int[] data) { {k<mN Y
MaxHeap h=new MaxHeap(); > a8'MK
h.init(data); A9y3B^\*
for(int i=0;i h.remove(); s";9G^:
System.arraycopy(h.queue,1,data,0,data.length); Xf|I=XK
} ~Y7:08
~2 J!I^J
private static class MaxHeap{ Yc>.P
`Y<FR
void init(int[] data){ 5&Le?-/\
this.queue=new int[data.length+1]; >Cglhsb:N
for(int i=0;i queue[++size]=data; Fau24-g
fixUp(size); @aWd0e]
} 8SO(pw9
} FlLk.+!t
t\,XG
private int size=0; ;c#jO:A5
x?G"58
private int[] queue; K|wB0TiXP
f2M}N
public int get() { 6"c(5#H
return queue[1]; Zx%6pZ(.
} e:;u_be~
r)f+j@KF
public void remove() { U{&gV~
SortUtil.swap(queue,1,size--); 3c[TPD_:
fixDown(1); 3ZL<6`YF
} Ob h@d|
file://fixdown 1>_2 =^[
private void fixDown(int k) { ks(BS k4
int j; 1xb1?/n1#
while ((j = k << 1) <= size) { X:OUu;
if (j < size %26amp;%26amp; queue[j] j++; N?mQ50o~C
if (queue[k]>queue[j]) file://不用交换 .arWbTR)~U
break; sK|+&BC
SortUtil.swap(queue,j,k); "l-R|>6~
k = j; Uf\U~wM<
} $xq$
} 9at_F'>R
private void fixUp(int k) { I73=PfS:m
while (k > 1) { 2j-^F
int j = k >> 1; V\r2=ok@y
if (queue[j]>queue[k]) bG!/%,s
break; :Mnl1;oh
SortUtil.swap(queue,j,k); d`J~w/] `\
k = j; 5P![fX|5
} Qis/'9a
} 1c*XmMB
N|
} cFloaCz
9<1dps=c
} q3/ 0xN+?
Xny{8Oo<1?
SortUtil： '>#8 F.
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package org.rut.util.algorithm; c#`&uLp
lw_PQ4Hp
import org.rut.util.algorithm.support.BubbleSort; qPgny/(
import org.rut.util.algorithm.support.HeapSort; {*K7P>&
import org.rut.util.algorithm.support.ImprovedMergeSort; *w23(f
import org.rut.util.algorithm.support.ImprovedQuickSort; Nu7lPEM
import org.rut.util.algorithm.support.InsertSort; %"BJW
import org.rut.util.algorithm.support.MergeSort; QJtO~~-
import org.rut.util.algorithm.support.QuickSort; %@Nu{?I
import org.rut.util.algorithm.support.SelectionSort; <,Pk
import org.rut.util.algorithm.support.ShellSort; nm]m!.$d
Isg\ fSK<j
/** ]YKxJ''u
* @author treeroot irKM?#h
* @since 2006-2-2 9qX)FB@'i;
* @version 1.0 e#z#bz2<
*/ $'93:9tg
public class SortUtil { wYN/ }>M
public final static int INSERT = 1; 3?bTs =
public final static int BUBBLE = 2; 4*V[^mht
public final static int SELECTION = 3; z--Y
public final static int SHELL = 4; U'0e<IcY
public final static int QUICK = 5; ]q3.^F
public final static int IMPROVED_QUICK = 6; 9}aEV 0 V|
public final static int MERGE = 7; Q4F&#^02y
public final static int IMPROVED_MERGE = 8; w7QYWf'
public final static int HEAP = 9; o&#!W(
oR'u&\mB
public static void sort(int[] data) { ^BhS*
sort(data, IMPROVED_QUICK); ^D A<=C-[!
} 5b;~&N4~
private static String[] name={ lHc9D
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" yUEvva
}; !p{CsR8c
;_p!20.(
private static Sort[] impl=new Sort[]{ 1SSS0&
new InsertSort(), j. mla
new BubbleSort(), EM,=R
new SelectionSort(), y=SVS3D
new ShellSort(), 7(C:ty9
new QuickSort(), w7b\?]}@
new ImprovedQuickSort(), WlmkM?@
new MergeSort(), `zsooA Gt
new ImprovedMergeSort(), eR:C?v
new HeapSort() W7"UhM
}; YpEH(tq
3U%kf<m=
public static String toString(int algorithm){ U}DLzn|w
return name[algorithm-1]; K#xL-
} 2$FH+wuW
e$o]f"(
public static void sort(int[] data, int algorithm) { `j!XWh*$
impl[algorithm-1].sort(data); % !Ih=DZ
} w[OUGn'
e@7UL|12
public static interface Sort { $) m$c5!
public void sort(int[] data); '+7"dHLC;
} Ih)4.lLcKn
z8cefD9F
public static void swap(int[] data, int i, int j) { 40}7O<9*
int temp = data; [I`:%y
data = data[j]; #|=Q5"wU
data[j] = temp; BRXDE7vw
} d:=Z<Y?d/
} 1H \