[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; 4kx#=MLt
} 1j}o.0\
int i1=l; <Wl! Qog'
int i2=mid+1; 1[!Idl?m
for(int cur=l;cur<=r;cur++){ HzWZQ6o
if(i1==mid+1) \PL92HV
data[cur]=temp[i2++]; 0ya_[\
else if(i2>r) pPh$Jvo]
data[cur]=temp[i1++]; KxY|:-"Tt
else if(temp[i1] data[cur]=temp[i1++]; R(csJ4F
else ?9AByg
data[cur]=temp[i2++]; #x'C
} xe 6x!
} 2(UT;PSI
uu(.,11`
} "3Ec0U \s
n] &fod
改进后的归并排序: :^l`m9
0^hz1\g
package org.rut.util.algorithm.support; ?Hq`*I?b9
3B>!9:w~f
import org.rut.util.algorithm.SortUtil; 6MZfoR
vq x;FAqZ
/** iE$0-Qe[3
* @author treeroot $)kIYM&
* @since 2006-2-2 J)*y1
* @version 1.0 4H{L>e
*/ i<-#yL5
public class ImprovedMergeSort implements SortUtil.Sort { @T1-0!TM')
MYLq2g\
private static final int THRESHOLD = 10; 4/HyO\?z5
ww=< =
/* _))_mxV{
* (non-Javadoc) 5Pn$@3
* y9:|}Vh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e=YvMg
*/ N-lXC"{)
public void sort(int[] data) { xJ,V!N
int[] temp=new int[data.length]; {<&x9<f9
mergeSort(data,temp,0,data.length-1); cD7q;|+
} $lUZm\R|k
^8B#-9Ph b
private void mergeSort(int[] data, int[] temp, int l, int r) { ?9/%K45
int i, j, k; F7a\Luae
int mid = (l + r) / 2; `$Q $l
if (l == r) 24]O0K
return; KrG$W/<tg
if ((mid - l) >= THRESHOLD) xqLLoSte
mergeSort(data, temp, l, mid); GQT|T0>Ro
else _bFX(~37z?
insertSort(data, l, mid - l + 1); S__+S7]Nr
if ((r - mid) > THRESHOLD) u2o6EU`
mergeSort(data, temp, mid + 1, r); :*Sl\:_X)
else XVE(p3-
insertSort(data, mid + 1, r - mid); J/=b1{d"n
vcqL
for (i = l; i <= mid; i++) { Gh|q[s*k
temp = data; "c=\?
} !i0:1{.
for (j = 1; j <= r - mid; j++) { .DIHd/wA
temp[r - j + 1] = data[j + mid]; H2[S]`?
} =p ^Sn,t
int a = temp[l]; =f?|f
int b = temp[r]; qJUu9[3'm
for (i = l, j = r, k = l; k <= r; k++) { (7&[!PS
if (a < b) { %5$yz|:
data[k] = temp[i++]; 8q}`4wCD$
a = temp; <{:$]3
} else { cl)%qIXj}H
data[k] = temp[j--]; ,}F{V>dhn
b = temp[j]; enE8T3
} /id(atiF^
} 6imDA]5N&
} e*=N\$
>4b-NS/}0
/** `TBau:ElI
* @param data LQ373 j-
* @param l ~O&3OL:L
* @param i Cz8=G;\
*/ AI/xOd!a
private void insertSort(int[] data, int start, int len) { 9Iy>oV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); szGp<xv_p
} @'jC>BS8`
} H~Hh$-z
} u6$fF=
} >@`D@_v
pd/{yX M
堆排序： q>?uB4>^
ze{
package org.rut.util.algorithm.support; [r<lAS{ .
hZU@35~BN
import org.rut.util.algorithm.SortUtil; +'x|VPY.PG
5W(G~m?jC6
/** ;gP@d`s
* @author treeroot 0_J<=T?\"s
* @since 2006-2-2 wRCGfILw
* @version 1.0 IJhJfr0)Oo
*/ $i7iv
public class HeapSort implements SortUtil.Sort{ DfXXN
@Q 8E)k@
/* (non-Javadoc) !/[/w39D0o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ckHHD|
*/ YQ:FBj
public void sort(int[] data) { 4en[!*
MaxHeap h=new MaxHeap(); -NGY+1
h.init(data); f,wB.MN
for(int i=0;i h.remove(); ep>*]'
System.arraycopy(h.queue,1,data,0,data.length); 7`9J.L&,;
} WyF1Fw
0Rz'#O32V
private static class MaxHeap{ oj/,vO:QT
*F42GiBZR
void init(int[] data){ :<=A1>&8
this.queue=new int[data.length+1]; tF}Vs}
for(int i=0;i queue[++size]=data; NifzZEX
fixUp(size); 87.b7 b.
} ~G+o;N,V
} wxYB-Wh<
j-e/nZR@
private int size=0; :FcYjw
sN]O]qYXJ
private int[] queue; ?nZQTO7
PQ9.aJdw@-
public int get() { +KGZk?%
return queue[1]; ]k &Y )
} wDJbax?
0.7*2s-
public void remove() { "^_9t'0
SortUtil.swap(queue,1,size--); BIovPvq;i
fixDown(1); ?nN3K
} HIM>%
file://fixdown -b'93_ZTu:
private void fixDown(int k) { Z\Qa6f!
int j; iU]py
while ((j = k << 1) <= size) { VbQ9o
if (j < size %26amp;%26amp; queue[j] j++; j{PuZ^v1
if (queue[k]>queue[j]) file://不用交换 v,qK=]ty
break; K.'II9-{
SortUtil.swap(queue,j,k); 8JvF4'zx
k = j; s"G;rcS}#
} (o`"s~)
} :wtr{,9rZ
private void fixUp(int k) { G4DuqN~2m
while (k > 1) { $$QbcnOf$
int j = k >> 1; ,QW>M$g{
if (queue[j]>queue[k]) G,,c,
break; 3N%%69JN)
SortUtil.swap(queue,j,k); O :P%gz4
k = j; d9@!se9&Z
} 2pa: 3O
} %{'hpT~h
cEzWIS?pp\
} HivmKn`
KFxy,Z$-4
} k\,01Y^
;;4xpg
SortUtil： u`GzYG-L
GR&T Z
package org.rut.util.algorithm; -UgD
pi`sx[T@{Z
import org.rut.util.algorithm.support.BubbleSort; zSs5F_
import org.rut.util.algorithm.support.HeapSort; ODE9@]a
import org.rut.util.algorithm.support.ImprovedMergeSort; -?)` OHc^
import org.rut.util.algorithm.support.ImprovedQuickSort; w s(9@
import org.rut.util.algorithm.support.InsertSort; @mM])V
import org.rut.util.algorithm.support.MergeSort; !B36+W+
import org.rut.util.algorithm.support.QuickSort; ]u~6fknm
import org.rut.util.algorithm.support.SelectionSort; 6uWzv~!*D
import org.rut.util.algorithm.support.ShellSort; -8F~Tffx
nFE0y3GD8
/** Sw!/IPO
* @author treeroot hN% h.;s
* @since 2006-2-2 D#lx&J.s
* @version 1.0 Nc4e,>$]&
*/ %\xwu(|kN
public class SortUtil { SVvR]T&_
public final static int INSERT = 1; :m|%=@]`
public final static int BUBBLE = 2; 7vBB <\
public final static int SELECTION = 3; \gd.Bl
public final static int SHELL = 4; t%jB[w&,os
public final static int QUICK = 5; N"d*pi#h
public final static int IMPROVED_QUICK = 6; 6fxf|R\
public final static int MERGE = 7; 9r@T"$V#c
public final static int IMPROVED_MERGE = 8; Rxe sK
public final static int HEAP = 9; 6.fahg?E
+{* @36A5A
public static void sort(int[] data) { Q=hf,/N
sort(data, IMPROVED_QUICK); t-#Y6U}b+
} \W73W_P&g
private static String[] name={ H}KJd5A7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !wl3}]q
}; (bP\_F5D
e%#8]$
private static Sort[] impl=new Sort[]{ h#p1wK;N
new InsertSort(), NG!~<Kx
new BubbleSort(), !Pmv
new SelectionSort(), )KvQaC
new ShellSort(), (C;oot,
new QuickSort(), FBfyW- 7
new ImprovedQuickSort(), G~Oj}rn
new MergeSort(), v&:R{
new ImprovedMergeSort(), ,~@0IKIA Q
new HeapSort() lqC a%V
}; GdN'G
^s'ozCk 0
public static String toString(int algorithm){ 0q%=Vs~@g
return name[algorithm-1]; _J}vPm
} eit>4xMu
MYqxkhcLH1
public static void sort(int[] data, int algorithm) { 8YI.f
impl[algorithm-1].sort(data); ,^JP0Vc*
} Q^qG=
?&Y3Fr)%
public static interface Sort { |qra.\
public void sort(int[] data); %;,D:Tv=&
} |0Kj0u8T
Q!DQ!;Br6
public static void swap(int[] data, int i, int j) { m4:b?[
int temp = data; F8 4LMk?U
data = data[j]; Jt4T)c9
data[j] = temp; c9e }P
} dOY+| P\
} h[d|y_)f