[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; bovAFdHW
} M}f(-,9
int i1=l; CjP<'0gT
int i2=mid+1; r@bh,U$
for(int cur=l;cur<=r;cur++){ $bFK2yx?=
if(i1==mid+1) zNdkwj p+
data[cur]=temp[i2++]; ~id:Rh>o
else if(i2>r) g.vE%zKL
data[cur]=temp[i1++]; %'Q2c'r
else if(temp[i1] data[cur]=temp[i1++]; i. (Af$
else VuH ->
data[cur]=temp[i2++]; <JU3sXl
} "k{so',7z
} -B&(&R
gZ7R^] k
} /F(n%8)Yq
u*rP8GuS
改进后的归并排序: & d2`{H
vv{+p(~**O
package org.rut.util.algorithm.support; 4KnBb_w
zB~<@
import org.rut.util.algorithm.SortUtil; x&0kIF'lq
f.+1Ubq!5
/** +A)> zx
* @author treeroot V[KN,o{6
* @since 2006-2-2 \=bKuP(it
* @version 1.0 lw.[qP
*/ 19#>\9*
public class ImprovedMergeSort implements SortUtil.Sort { >eQ.y- 4
0<NS1y
private static final int THRESHOLD = 10; 4OpzGZ4+
zyUS$g]&
/* MGt>:&s(]
* (non-Javadoc) $Th)z}A}EA
* $T^q>v2u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &ah%^Z4um
*/ Qz#By V:
public void sort(int[] data) { wK#*|
int[] temp=new int[data.length]; b \ln XN
mergeSort(data,temp,0,data.length-1); ?4Rd4sIM$u
} V|$PO Qa3
'xGhMgR;
private void mergeSort(int[] data, int[] temp, int l, int r) { *Q/^ib9=
int i, j, k; o5NmNOXm
int mid = (l + r) / 2; :Ev gUA\4
if (l == r) t'@mUX:-A
return; J~3m7
if ((mid - l) >= THRESHOLD) t^FE]$,
mergeSort(data, temp, l, mid); VN!nef
else FpA t
insertSort(data, l, mid - l + 1); Ui`{U
if ((r - mid) > THRESHOLD) -OlrA{=c_
mergeSort(data, temp, mid + 1, r); Zd>sdS`#r
else XGH:'^o_
insertSort(data, mid + 1, r - mid); AJxN9[Z!N
}9fch9>Zr
for (i = l; i <= mid; i++) { )&d=2M;3
temp = data; H>%AK''
} bS r"k
for (j = 1; j <= r - mid; j++) { j9hfW'
temp[r - j + 1] = data[j + mid]; =2Yt[8';
} ['.])
int a = temp[l]; 1ruI++P
int b = temp[r]; "g&f:[a/
for (i = l, j = r, k = l; k <= r; k++) { i#t-p\Tcz
if (a < b) { )Ak#1w&q
data[k] = temp[i++]; Babzrt-
a = temp; n+ebi>}P
} else { ^Z?m)qxvB
data[k] = temp[j--]; BOw[*hM
b = temp[j]; 76)"uqv1x
} e8^/S^ =&d
} ~1wt=Ln>
} tjb$MW$('
TZt;-t`
/** A%Ka)UU+n
* @param data xw 43P.
* @param l R P<M
* @param i ,#3Aaw
*/ EHm*~Sd
private void insertSort(int[] data, int start, int len) { e,_Sj(R8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0lg'QG>
} 4J_HcatOB
} `y.4FA4"8
} *u"%hXR
} 8:V,>PH
aO&{.DO2
堆排序： 9U6$-]J
x-CjxU3
package org.rut.util.algorithm.support; B#%QY\<X
yj4"eDg]
import org.rut.util.algorithm.SortUtil; N{HAWB{
u0&R*YV
/** 9d#?,:JG
* @author treeroot >*ls} q^
* @since 2006-2-2 .eD&UQ
* @version 1.0 jsE8=zZs
*/ zP #:Tv'
public class HeapSort implements SortUtil.Sort{ Su6kpC!EW
{]]%0!n\
/* (non-Javadoc) 0j!3\=P$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NeY*l
*/ 1n^N`lD8]6
public void sort(int[] data) { 20|_wAA5
MaxHeap h=new MaxHeap(); (c0L H
h.init(data); +?U[362>
for(int i=0;i h.remove(); %"Um8`]FVg
System.arraycopy(h.queue,1,data,0,data.length); P(k*SB|D
} p;}`PW
$`3yImv+w
private static class MaxHeap{ Z%3CmKdeF
9m$"B*&6G
void init(int[] data){ 6GunEYK!N8
this.queue=new int[data.length+1]; -^m?%_<50l
for(int i=0;i queue[++size]=data; 6)uBUM;i
fixUp(size); 5tbCx!tL
} +a.2\Qt2A
} `KA==;0
=M;F&;\8
private int size=0; D r(0w{5
3Jizv,?
private int[] queue; SqPqL<,e
?g+3 URpK
public int get() { lz#.f,h
return queue[1]; 7gf(5p5ZV
} q=88*Y
#ay/VlD@
public void remove() { NgyEy n \
SortUtil.swap(queue,1,size--); QvZ"{
fixDown(1); FJtmRPP[r
} #U`AK9rP_g
file://fixdown 1*hEbO
private void fixDown(int k) { _dd! nU\A|
int j; kiM:(=5
while ((j = k << 1) <= size) { LP#wE~K"b
if (j < size %26amp;%26amp; queue[j] j++; Eu(QeST\
if (queue[k]>queue[j]) file://不用交换 U|Fqna
break; v3Vve:}+
SortUtil.swap(queue,j,k); 3xs<w7
k = j; Lf5zHUH
} i;^lh]u
} Gb`)d
private void fixUp(int k) { S2'ai
while (k > 1) { (_e[CqFu
int j = k >> 1; vlkwWm
if (queue[j]>queue[k]) $8eiifj
break; =|E "
SortUtil.swap(queue,j,k); &wK:R,~x6
k = j; {UP[iw$~
} gW~T{+f
} cgrSd99.
hE(R[hc
} A|f6H6UUx
i0{\c}r:4b
} 2(DhKHrF
BN79\rt
SortUtil： )^o.H~Pv
?m*e$!M0
package org.rut.util.algorithm; NuR7pjNMZ
:38{YCN
import org.rut.util.algorithm.support.BubbleSort; d|RUxNjM-J
import org.rut.util.algorithm.support.HeapSort; ^>l <)$s
import org.rut.util.algorithm.support.ImprovedMergeSort; -8qCCV&1i
import org.rut.util.algorithm.support.ImprovedQuickSort; 1}\p:`
import org.rut.util.algorithm.support.InsertSort; 3Sfd|0^
import org.rut.util.algorithm.support.MergeSort; k^%=\c
import org.rut.util.algorithm.support.QuickSort; LhLAQ2~
import org.rut.util.algorithm.support.SelectionSort; % vUU Fub
import org.rut.util.algorithm.support.ShellSort; I9qZE=i
3!p`5hJd
/** s;TB(M~i[
* @author treeroot (%L/|F_
* @since 2006-2-2 >M2~p&Si
* @version 1.0 !}h) |
*/ Vhv'Z\
public class SortUtil { Qz|T0\=V
public final static int INSERT = 1; c@[Trk m
public final static int BUBBLE = 2; %9>w|%+;U+
public final static int SELECTION = 3; ZXb|3|D
public final static int SHELL = 4; F&wAre<
public final static int QUICK = 5; mh}D[K=~%
public final static int IMPROVED_QUICK = 6; N[W#wYbH
public final static int MERGE = 7; 0C :8X
public final static int IMPROVED_MERGE = 8; =|i_T%a
public final static int HEAP = 9; %htI!b+"@
3*</vo#`
public static void sort(int[] data) { C+**!uYIB
sort(data, IMPROVED_QUICK); ]F+|C
} i,;JI>U
private static String[] name={ c0Ih$z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $}su'EIo
}; 0L/chP
LnE/62){N
private static Sort[] impl=new Sort[]{ ,7@\e&/&
new InsertSort(), X,w X)9]J
new BubbleSort(), L/ibnGhq]
new SelectionSort(), [>v1JN
new ShellSort(), Cqnuf5e>L
new QuickSort(), aH."| *.
new ImprovedQuickSort(), ]?(kaNQ"D
new MergeSort(), v1{j1~ZR
new ImprovedMergeSort(), \|S%zX
new HeapSort() 4:rwzRDY
}; flPS+
hYzP6?K"
public static String toString(int algorithm){ >Gpq{Ph[
return name[algorithm-1]; x$-kw{N
} -/?)0E
gNW+Dq|X%
public static void sort(int[] data, int algorithm) { ^ELZ35=qZ
impl[algorithm-1].sort(data); C,+
} imif[n+]}d
l[i4\ CT
public static interface Sort { Zm0VaOT$I
public void sort(int[] data); 23r(4
} qj_0 td$
'zm5wqrkAd
public static void swap(int[] data, int i, int j) { }MOXJb @
int temp = data; op`9(=DJ]
data = data[j]; %}TJr]'F
data[j] = temp; "B:FSWM_-
} [Ep'm
} rEWJ3*Hb