[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; ("E!Jyc!
} {(Og/[
int i1=l; -nk#d%a\
int i2=mid+1; ?,:#8.9
for(int cur=l;cur<=r;cur++){ oY%"2PW1B
if(i1==mid+1) )ojx_3j8
data[cur]=temp[i2++]; R+E_#lP_$
else if(i2>r) [.;%\>Qk<
data[cur]=temp[i1++]; |'c4er/;#
else if(temp[i1] data[cur]=temp[i1++]; >H}jR[H'
else 1a&/Zlr
data[cur]=temp[i2++]; Wk`bb!P_
} wKk 3)@il
} O:;OR'N9
]Y4q'KH
} l*K I
f4'El2>-86
改进后的归并排序: v._Egk0
j?\$G.Y
package org.rut.util.algorithm.support; M!Z*QY."P
3cOY0Z#T
import org.rut.util.algorithm.SortUtil; 5[,+\
%'L].+$t
/** n .f4z<
* @author treeroot -,QKTxwo>
* @since 2006-2-2 ofMu3$Q
* @version 1.0 &so-O90
*/ (;0$i?3\
public class ImprovedMergeSort implements SortUtil.Sort { 48tcgFg[
%n05Jitl
private static final int THRESHOLD = 10; 4>4V-m\
E?Zb~xk
/* ^W Y8-6
* (non-Javadoc) Z+Yeg
* n1QEu"~Zj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) { p1lae
*/ 59{;VY81
public void sort(int[] data) { lSH ZV Fd
int[] temp=new int[data.length]; I&L.;~
mergeSort(data,temp,0,data.length-1); |DN^NhtE
} 6xH;:B)d
4|[<e-W
private void mergeSort(int[] data, int[] temp, int l, int r) { ,~(|p`
int i, j, k; 3A-*vaySV
int mid = (l + r) / 2; HSNOL
if (l == r) w#*/y?"D
return; WgE@89
if ((mid - l) >= THRESHOLD) >n]oB~P%
mergeSort(data, temp, l, mid); h`=r)D
else k+FMZ,D|
insertSort(data, l, mid - l + 1); ^_@r.y]
if ((r - mid) > THRESHOLD) :'Zx{F`
mergeSort(data, temp, mid + 1, r); O?CdAnhQc`
else 'X9AG6K1
insertSort(data, mid + 1, r - mid); Hi^35
F8;mYuA
for (i = l; i <= mid; i++) { lbRzx4=\y
temp = data; Y?<)Dg.[
} >tN5vWW
for (j = 1; j <= r - mid; j++) { [w!C*_V 9
temp[r - j + 1] = data[j + mid]; iHPUmTus--
} KYp[Gs
int a = temp[l]; ;AKwx|I$g
int b = temp[r]; eNtf#Rqym
for (i = l, j = r, k = l; k <= r; k++) { j !`B'{cH
if (a < b) { Oukd_Ryf
data[k] = temp[i++]; <Z},A-\S*
a = temp; bl=ku<}@
} else { }MP>]8Aq
data[k] = temp[j--]; )IHG6}<
b = temp[j]; ?\ZL#)hr"p
} ioxbf6{
} I7~|~<
} {Ur7#h5
=-w;zx
/** [ 7g><
* @param data {?Od{d9
* @param l dN< ,%}R
* @param i {=67XrWN1
*/ V C-d0E0
private void insertSort(int[] data, int start, int len) { {{\ce;hN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b?8)7.{F{
} Jd_;@(Eg=
} 6kN:*
} Zyu/|Og
} -\4zwIH
iPvuz7j=h
堆排序： 3@_Elu
E$A3|rjnoN
package org.rut.util.algorithm.support; ygzxCn|#
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import org.rut.util.algorithm.SortUtil; <F(><Xw,-4
)"|||\Iv
/** B2Z_]q$n*
* @author treeroot -R b{^/
* @since 2006-2-2 dEp7{jY1O
* @version 1.0 j/KO|iNL2
*/ 2:SO_O4C
public class HeapSort implements SortUtil.Sort{ O$D?A2eI
UG](go't
/* (non-Javadoc) PyBD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,6{iT,~@8
*/ nS9wb1Zl
public void sort(int[] data) { $!B}$I;cd
MaxHeap h=new MaxHeap(); 69OF_/23
h.init(data); Z6Fp\aI8@
for(int i=0;i h.remove(); 9t$]X>}
System.arraycopy(h.queue,1,data,0,data.length); -1u9t4+`
} 4<gb36)|4
kXrlSaIc
private static class MaxHeap{ "N5!mpD"
iM]o"qOQm
void init(int[] data){ O9"/ kmB
this.queue=new int[data.length+1]; =Vw 5q},3
for(int i=0;i queue[++size]=data; hgj <>H|
fixUp(size); F_H82BE+3
} k[kju%i4
} ,xfO;yd
t0)<$At6J
private int size=0; 1P(&J
qfoD
private int[] queue; \tN-(=T
SUM4Di7
public int get() { oCS2E =O&
return queue[1]; _iV]_\0W2
} $O)3q $|
N<(.%<!
public void remove() { T0zn,ej
SortUtil.swap(queue,1,size--); m P'^%TE
fixDown(1); p< "3&HA
} 6CbxuzYer
file://fixdown RsJ6OFcWV
private void fixDown(int k) { H1n1-!%d
int j; fw6UhG
while ((j = k << 1) <= size) { ~m^ #FJu
if (j < size %26amp;%26amp; queue[j] j++; /3B $(
if (queue[k]>queue[j]) file://不用交换 ?>"Yr,b?
break; L|@y&di
SortUtil.swap(queue,j,k); e]=lKxFh&l
k = j; ::FS/Y]Fg
} 6Htg5o|W
} uvP2Wgt
private void fixUp(int k) { YuZ"s55zU{
while (k > 1) { 3I\n_V<
int j = k >> 1; 91>fqe
if (queue[j]>queue[k]) %wcSM~w
break; l<0}l^C.
SortUtil.swap(queue,j,k); B/~%h|
k = j; #jA[9gWI
} X3'H `/
} r}[7x]sP
EI!6MC)
} ib{-A&
2MZCw^s>
} A+hT3;lp
\%^%wXfp
SortUtil： -46C!6a
@2'Mt}R>
package org.rut.util.algorithm; ZaNQpH.
y6]vl=^L
import org.rut.util.algorithm.support.BubbleSort; "HE^v_p
import org.rut.util.algorithm.support.HeapSort; C4TE-OM8
import org.rut.util.algorithm.support.ImprovedMergeSort; Vz6Qxd{m3
import org.rut.util.algorithm.support.ImprovedQuickSort; ]?*I9
import org.rut.util.algorithm.support.InsertSort; V<k8N^
import org.rut.util.algorithm.support.MergeSort; #>Zzf
import org.rut.util.algorithm.support.QuickSort; Aq3}Ng
import org.rut.util.algorithm.support.SelectionSort; V5*OA??k<
import org.rut.util.algorithm.support.ShellSort; /cU<hApK
kbM3
/** y!!2WHvE
* @author treeroot s%<eD
* @since 2006-2-2 fbUr`~Y"
* @version 1.0 Q-1vw6d
*/ w^t/9Nasi
public class SortUtil { %2v4<icvq
public final static int INSERT = 1; /Q~i~B 2j-
public final static int BUBBLE = 2; n=[/Z!
public final static int SELECTION = 3; 9-MUX^?u
public final static int SHELL = 4; JH7<
public final static int QUICK = 5; R?]02Q
public final static int IMPROVED_QUICK = 6; K'GBMnjD
public final static int MERGE = 7; ~?(N
public final static int IMPROVED_MERGE = 8; s_mS^`P7
public final static int HEAP = 9; S\;V4@<Kn
w!D|]LoE
public static void sort(int[] data) { <u2}i<#
sort(data, IMPROVED_QUICK); <)3u6Vky9
} EVGt 5z
private static String[] name={ d@qsdYu-*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5k.oW=
}; O&Y*pOg
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private static Sort[] impl=new Sort[]{ 4M2j!Sw
new InsertSort(), !_Wi!Vr_
new BubbleSort(), s=;uc]9g
new SelectionSort(), @<elq'2
new ShellSort(), 3xaR@xjS
new QuickSort(), Hg=";,J
new ImprovedQuickSort(), Sn|BlXrey
new MergeSort(), Y/*mUS[oa
new ImprovedMergeSort(), <P=twT;P
new HeapSort() 4GX-ma,
}; Hhcpp7cr'
B&n<M]7
public static String toString(int algorithm){ XzEc2)0'v
return name[algorithm-1]; N u<_}
} QD0"rxZJ
TOB]IrW
public static void sort(int[] data, int algorithm) { bAx-"Lu
impl[algorithm-1].sort(data); ,Vt/(x-
} )mF5Vw"
PoxK{Y
public static interface Sort { !1$])VQWI
public void sort(int[] data); H}hiT/+$
} KbA?7^zo`
OCBgR4I
public static void swap(int[] data, int i, int j) { ur:3W6ZKl
int temp = data; n[lJLm^(_C
data = data[j]; w5Y04J
data[j] = temp; qVH1}9_
} _./Sk|C
} 2AT5