[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; $)Pmr1==
} *`.4M)Ym~
int i1=l; 3ZU<u;
int i2=mid+1; &y=~:1&f
for(int cur=l;cur<=r;cur++){ "M5&&\uT
if(i1==mid+1) Og3bV_,"
data[cur]=temp[i2++]; (_O_zu8_
else if(i2>r) 5T;,wQ<
data[cur]=temp[i1++]; cE0Kvqe`
else if(temp[i1] data[cur]=temp[i1++]; $2\k| @)s
else YC0FXNV
data[cur]=temp[i2++]; *FEY"W+bY
} ;R.l?Bg
} 2d Px s:8&
LXQ-J
} !t92_y3
bAqaf#}e
改进后的归并排序: :ift{XR'
gAgP("
package org.rut.util.algorithm.support; 4`+hX'
Oy/+uw^
import org.rut.util.algorithm.SortUtil; {,rVA(I@
Nm]\0m0p-
/** kKg%[zXS
* @author treeroot g>*t"Rf:
* @since 2006-2-2 e'Th[ wJ
* @version 1.0 O%(k$fvM
*/ U i ~*]
public class ImprovedMergeSort implements SortUtil.Sort { x9!vtrM\Zr
Skd,=r
private static final int THRESHOLD = 10; y~\K~qjd
Q.G6y,KR
/* u2xb^vu
* (non-Javadoc) L E>A|M$X
* y}bE'Od
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *T'>-nm]
*/ +k4SN
public void sort(int[] data) { h&6v&%S/L
int[] temp=new int[data.length]; *m[ow s
mergeSort(data,temp,0,data.length-1); "?Cx4<nsM
} ?=h{`Ci^ $
D*R49hja{
private void mergeSort(int[] data, int[] temp, int l, int r) { ?"[h P=3J
int i, j, k; I5J9,j
int mid = (l + r) / 2; Gp/yr
if (l == r) q={\|j$X
return; ]}&f<X
if ((mid - l) >= THRESHOLD) $lMEZt8A
mergeSort(data, temp, l, mid); r%/*,lLO
else /)` kYD6
insertSort(data, l, mid - l + 1); q0hg0DC[;
if ((r - mid) > THRESHOLD) a jCx"J
mergeSort(data, temp, mid + 1, r); ^#4?v^QNh
else ?#LbhO*
insertSort(data, mid + 1, r - mid); gqRwN p
d?/?VooU
for (i = l; i <= mid; i++) { e/;chMCq
temp = data; B^SD5
} V3u[{^^f
for (j = 1; j <= r - mid; j++) { ~e<v<92Xu
temp[r - j + 1] = data[j + mid]; a9GLFA8Vq
} Vnv9<=R
int a = temp[l]; =wW3Tr7~
int b = temp[r]; ![BQ;X
for (i = l, j = r, k = l; k <= r; k++) { .hxcx>%
if (a < b) { |E)Es!dr
data[k] = temp[i++]; 'MHbXFM
a = temp; ''f07R
} else { L@|W&N;%a
data[k] = temp[j--]; XKU+'Tz
b = temp[j]; qi\!<clv
} Sh=Px9'i
} YpT x1c-
} o0p%j4vac
t1)b26;
/** 0UmKS\P
* @param data c2z%|\q
* @param l s}d1 k
* @param i S3=M k~_&
*/ .f V-puE
private void insertSort(int[] data, int start, int len) { I"]5B
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); JxP=[>I
} oAkF
} ?[K+Ym+
} w`vJE!4B
} iTt"Ik'
wR?M2*ri
堆排序： oOhm`7iy
e4V4%Qw
package org.rut.util.algorithm.support; AT:T%a:G?
d))(hk:
import org.rut.util.algorithm.SortUtil; .3%eSbt0
:Gh* d)
/** rdsm /^,s
* @author treeroot $Gs&' yR
* @since 2006-2-2 ->oQ,ezB
* @version 1.0 pHFh7-vj
*/ }*~EA=YN;
public class HeapSort implements SortUtil.Sort{ 7 N?x29
`MgR/@%hr
/* (non-Javadoc) `CI9~h@k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \guZc}V]:\
*/ .[hQ#3)W
public void sort(int[] data) { %($qg-x
MaxHeap h=new MaxHeap(); .F0V
h.init(data); _XtLO-D
for(int i=0;i h.remove(); _=1SR\
System.arraycopy(h.queue,1,data,0,data.length); hv'~S
} .#uRJo%8
3,bA&c3
private static class MaxHeap{ oAX-Sg-/$
';x .ry
void init(int[] data){ 9x,Aqr$t
this.queue=new int[data.length+1]; fv!l{
for(int i=0;i queue[++size]=data; K h9$
fixUp(size); :z^ps0
} 5#.uA_Fov
} 2,O-/A;tW*
Wiqy".YY
private int size=0; dhN[\Z%
Ru Q\H0pr
private int[] queue; p;:tzH\l
<0T4MR7
public int get() { (}fbs/8\p
return queue[1]; )p"37Ct?
} #D3e\(
Hw5\~!FX
public void remove() { 0}qij
SortUtil.swap(queue,1,size--); />XfK,c-
fixDown(1); Z&=K+P
} BBw`8!
file://fixdown L`YnrDZK
private void fixDown(int k) { =iRi9r'l
int j; ^Ois]#py
while ((j = k << 1) <= size) { EH"iK2n\9
if (j < size %26amp;%26amp; queue[j] j++; pvTV*
if (queue[k]>queue[j]) file://不用交换 #lQbMuR
break; xTX\%s|
SortUtil.swap(queue,j,k); l!\C"f1o,
k = j; %*<k5#Yq
} |H5){2V>K
} rd\mFz-SB
private void fixUp(int k) { iYA06~d
while (k > 1) { FpE83}@".w
int j = k >> 1; ]DdD FLM
if (queue[j]>queue[k]) @QtJ/("&WC
break; /a6\G.C5
SortUtil.swap(queue,j,k); *}3e'0`
k = j; jK\2y|&&c
} K;G1cFFyG
} \~Zj](#
;C-5R U V
} bslv_OxJ
jHBn^Nly
} mwCNfwb:
%96JH YcX
SortUtil： {$>*~.Wu
OekcU%C
package org.rut.util.algorithm; Kwfrh?
4QK([q
import org.rut.util.algorithm.support.BubbleSort; JiP]FJ;
import org.rut.util.algorithm.support.HeapSort; &qFdP'E;$
import org.rut.util.algorithm.support.ImprovedMergeSort; kjN9(&D
import org.rut.util.algorithm.support.ImprovedQuickSort; ExI?UGT
import org.rut.util.algorithm.support.InsertSort; 3j0/&ON
import org.rut.util.algorithm.support.MergeSort; JGf6*D"O
import org.rut.util.algorithm.support.QuickSort; 8nQlmWpJ
import org.rut.util.algorithm.support.SelectionSort; a9"x_IVU
import org.rut.util.algorithm.support.ShellSort; *D F5sY
('W#r"
/** KU3lAjzN
* @author treeroot }_0?S0<#
* @since 2006-2-2 9M~EH?>+[
* @version 1.0 S D]d/|y
*/ IoJkM-^H&)
public class SortUtil { X.xp'/d
public final static int INSERT = 1; W<yh{u&,
public final static int BUBBLE = 2; Q5r cPU>A
public final static int SELECTION = 3; W!I"rdo;V
public final static int SHELL = 4; o&g=Z4jj<
public final static int QUICK = 5; 6<NaME
public final static int IMPROVED_QUICK = 6; 29u"\f a
public final static int MERGE = 7; $WnK
public final static int IMPROVED_MERGE = 8; #@Zz Bf
public final static int HEAP = 9; ag14omM-
G?e,Q$
public static void sort(int[] data) { q+dY&4&u
sort(data, IMPROVED_QUICK); H]"Z_n_
} s[h'W~
private static String[] name={ -n!.PsGO>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" I o7pp(
}; 9fvy)kX;s
I5Foh|)
private static Sort[] impl=new Sort[]{ h(]O;a-
new InsertSort(), nWbe=z&y8[
new BubbleSort(), 0Apdhwk~
new SelectionSort(), @pYAqX2
new ShellSort(), )#T(2A
new QuickSort(), ]&yO>\MgJB
new ImprovedQuickSort(), Mmbb}(<
new MergeSort(), SYB } e
new ImprovedMergeSort(), %#02Z%?%
new HeapSort() bU=!~W5
}; WUGPi'x
0fXdE ;M3
public static String toString(int algorithm){ kE,~NG9P
return name[algorithm-1]; qUx!-DMY
} f_9%kEXICt
N|z-s
public static void sort(int[] data, int algorithm) { joAR;J
impl[algorithm-1].sort(data); eek5Xm
} >6=yxCJ
KKa"Ba$g
public static interface Sort { Bca\grA
public void sort(int[] data); p{t2pfb
} Sq UoXNw
'_g8fz 3
public static void swap(int[] data, int i, int j) { jbn{5af
int temp = data; Ngu+V
data = data[j]; _I&0HRi
data[j] = temp; eq"a)QB3m
} a>.2Q<1
} -}MWA>an8