[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; N*KM6j
} " "CNw-^t
int i1=l; u~Y+YzCxV
int i2=mid+1; V9;IH<s:
for(int cur=l;cur<=r;cur++){ Vp8!-[R
if(i1==mid+1) jk])S~xl?
data[cur]=temp[i2++]; K~qKr<)
else if(i2>r) w3Dqpo8E
data[cur]=temp[i1++]; 0{stIgB$
else if(temp[i1] data[cur]=temp[i1++]; g&/r =U
else V|4k=_-
data[cur]=temp[i2++]; .G/RQn]x}
} |KSoS#Y
} HzZX=c
WVx^}_FD0
} & 5'cN
JNI&]3[C>?
改进后的归并排序: i}C%`1+(
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package org.rut.util.algorithm.support; NH,4>mV$!
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import org.rut.util.algorithm.SortUtil; 1Nz#,IdQ
$ \ I|6[P
/** h|EHK!<"8
* @author treeroot x`K"1E{2
* @since 2006-2-2 '~xjaa;.
* @version 1.0 u}jC$T>2%6
*/ |+1k7S,
public class ImprovedMergeSort implements SortUtil.Sort { I.1(qbPkF+
@[;$R@M_3
private static final int THRESHOLD = 10; OuB[[L
1+ V<-I@{
/* Oz=!EG|N
* (non-Javadoc) I$f'BAw
* qITd.< k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (>-(~7PR
*/ ,(kaC.Em
public void sort(int[] data) { J^mm"2
int[] temp=new int[data.length]; oho~?.F
mergeSort(data,temp,0,data.length-1); WAVEwA`r
} iv6bXV'N
lR^W*w4y
private void mergeSort(int[] data, int[] temp, int l, int r) { {InW%qSn_
int i, j, k; @Z@S;RWSU
int mid = (l + r) / 2; #/WjKr n
if (l == r) /$UWTq/C7
return; l^v,X%{Iz
if ((mid - l) >= THRESHOLD) lH>6;sE
mergeSort(data, temp, l, mid); wOR#sp&
else FNXVd/{M3
insertSort(data, l, mid - l + 1); pF:C
if ((r - mid) > THRESHOLD) ,u
mergeSort(data, temp, mid + 1, r); >yr3C
else .X6V>e)(3
insertSort(data, mid + 1, r - mid); tBE-:hX*
7zu3o
for (i = l; i <= mid; i++) { O9:J ^g
temp = data; A~'p~@L
} w)Y}hlcq
for (j = 1; j <= r - mid; j++) { D^w<V%].
temp[r - j + 1] = data[j + mid]; XQj+]-m
} AKAxfnaR
int a = temp[l]; ^ANz=`N5,
int b = temp[r]; mz^[C7(q'(
for (i = l, j = r, k = l; k <= r; k++) { Q0TKM>
if (a < b) { 6`)Ss5jzk
data[k] = temp[i++]; 83:qIfF
a = temp; KI5099_/
} else { lDG.\u
data[k] = temp[j--]; Y= ^o {C6
b = temp[j]; {ALOs^_-
} -V}ZbXJD
} &fifOF#[e
} [&{NgUgu"
21\?FQrz
/** )H1chNI)
* @param data x_x|D|@wM
* @param l 9q"G g?
* @param i h>"Z=y
*/ cP8@'l@!
private void insertSort(int[] data, int start, int len) { Ky'\t7p u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1)!]zV
} GoG_4:^#h
} $I90KQB\_
} A|P `\_
} b'4r5@GO
Td![Id
堆排序： 20mZ{_%
jp-]];:aPJ
package org.rut.util.algorithm.support; Ji:0J},m
.n)0@X!
import org.rut.util.algorithm.SortUtil; %gXNWxv
Y^uYc}
/** 8j!(*'J.
* @author treeroot p9iCrqi
* @since 2006-2-2 _ 4+=S)$
* @version 1.0 ]\:l><
*/ PX,fg5s\b
public class HeapSort implements SortUtil.Sort{ "yxBD 7
e irRAU
/* (non-Javadoc) n/GJ&qLi:g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s B!2't
*/ p:8]jD@}%
public void sort(int[] data) { kA&ul
MaxHeap h=new MaxHeap(); c#(&\g2H
h.init(data); rDU"l{cg
for(int i=0;i h.remove(); M.}QXta
System.arraycopy(h.queue,1,data,0,data.length); .(zZTyZr
} "_/5{Nc$
*wfkjG
private static class MaxHeap{ vghn+P8
w^QqYUL${
void init(int[] data){ |)u|@\{
this.queue=new int[data.length+1]; ]ch=D
for(int i=0;i queue[++size]=data; W[j7Vi8v
fixUp(size); XY`2>7
} (ZuV5|N
} `G.:G/b%H
<2RxyoDL6
private int size=0; AkRZUj\
_k.gVm
private int[] queue; 60Obek`
_fANl}Mf:
public int get() { eE;")t,
return queue[1]; 'k[gxk|d2
} G6x2!Ny
sOW,hpNW
public void remove() { F`YxH*tO7
SortUtil.swap(queue,1,size--); Z'z~40Bda
fixDown(1); S~ 3|
} )Z2t=&Nw
file://fixdown JSm3ZP|GqJ
private void fixDown(int k) { k~b8=$
int j; QYTwGThWR
while ((j = k << 1) <= size) { U9p^?\-=
if (j < size %26amp;%26amp; queue[j] j++; _a,XL<9I
if (queue[k]>queue[j]) file://不用交换 >~^##bIb
break; W4(O2RU
SortUtil.swap(queue,j,k); z?8Sie
k = j; 6 _\j_$
} ihdtq
} b`sph%&
private void fixUp(int k) { EaGS}=qY5
while (k > 1) { Y^f12%
int j = k >> 1; Gk5SG_o
if (queue[j]>queue[k]) &g<`i{_
break; Jv=G3=.
SortUtil.swap(queue,j,k); XS/5y(W
k = j; wY j~(P"
} 7oI^shk
} :WBl0`kW]4
f*SAbDE
} g8_IZ(%:
&vp0zYd+v
} Z;JZ<vEt92
9#@CmiIhy
SortUtil： vXM``|
3M&75OE
package org.rut.util.algorithm; L&nGjC+Lr
VCvqiHn
import org.rut.util.algorithm.support.BubbleSort; oxPb; %
import org.rut.util.algorithm.support.HeapSort; RycO8z*p
import org.rut.util.algorithm.support.ImprovedMergeSort; 8;s$?*Gi
import org.rut.util.algorithm.support.ImprovedQuickSort; XOy#?X/`
import org.rut.util.algorithm.support.InsertSort; 4hv'OEl
import org.rut.util.algorithm.support.MergeSort; ]& qmV
import org.rut.util.algorithm.support.QuickSort; %lU$;cY
import org.rut.util.algorithm.support.SelectionSort; RFkJ^=}
import org.rut.util.algorithm.support.ShellSort; N]sX r
Zb7:qe<UN
/** =JnUTc_u
* @author treeroot ico(4KSk
* @since 2006-2-2 c!%:f^7g
* @version 1.0 'HV}Tr
*/ PF(P"f.?D
public class SortUtil { o^! Zt 9
public final static int INSERT = 1; =>CrZ23B"
public final static int BUBBLE = 2; hD/bO
public final static int SELECTION = 3; ~U~4QQV
public final static int SHELL = 4; $V8B =k~
public final static int QUICK = 5; HiG&`:P>q
public final static int IMPROVED_QUICK = 6; R%Yws2Le2
public final static int MERGE = 7; d0 tN73(
public final static int IMPROVED_MERGE = 8; `'[ 7M
public final static int HEAP = 9; 3:Sv8csT
r(yb%p+
public static void sort(int[] data) { 2aN
sort(data, IMPROVED_QUICK); S-h1p`
} G?/1 F1
private static String[] name={ [J+K4o8L<A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T`=N^Ca1!`
}; )N2yhdcqI
.n`MPx'
private static Sort[] impl=new Sort[]{ k>Qr14F
new InsertSort(), pDlh^?cux
new BubbleSort(), N3H!ptn37
new SelectionSort(), >}/"gx
new ShellSort(), +* )Qi)
new QuickSort(), Q_#X*I
new ImprovedQuickSort(), 3Pp*ID
new MergeSort(), E4[\lX$J
new ImprovedMergeSort(), 9=I(AYG{m
new HeapSort() 6#5@d^a
}; \o@b5z]e
9ffRY,1@
public static String toString(int algorithm){ ^\mN<z(
return name[algorithm-1]; >|7&hj$
} zT~ GBC-IX
1)NX;CN
public static void sort(int[] data, int algorithm) { (vjQF$Hp
impl[algorithm-1].sort(data); 7w{`f)~
} wy_TFV
&^9>h/-XT
public static interface Sort { M)EUR0>8
public void sort(int[] data); 9&'Mb[C`"
} v(4C?vxhG
( L RX
public static void swap(int[] data, int i, int j) { gpr];lgS
int temp = data; Dl/UZ@8pl
data = data[j]; ^m8\fCA*
data[j] = temp; ;wprHXjq
} fC%;|V'Nd
} qBX<{[