[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; 7Y*m_AhxJ
} i:8^:(i
int i1=l; kL|Y-(FPo%
int i2=mid+1; qRGb3l
for(int cur=l;cur<=r;cur++){ Qy/bzO
if(i1==mid+1) c_a$g
data[cur]=temp[i2++]; 9G8QzIac
else if(i2>r) EH "g`r
data[cur]=temp[i1++]; M>J ADt_]
else if(temp[i1] data[cur]=temp[i1++]; t5Mo'*j =
else d$,i?d,
data[cur]=temp[i2++]; v(7A=/W_
} E6@;e-]j
} _~(Xd@c(
:{ T#M$T
} pNJM]-D]m~
.-Lqo=o\
改进后的归并排序: +?:V\niQI
#rr-4$w+
package org.rut.util.algorithm.support; 2,;t%GB
!Cy2>6v7
import org.rut.util.algorithm.SortUtil; RZtL<2.@
uY~A0I5Z
/** Bw=[g&+o1@
* @author treeroot g&vEc1LNo
* @since 2006-2-2 bX(*f>G'
* @version 1.0 _z5CplO
*/ C|zH {.H
public class ImprovedMergeSort implements SortUtil.Sort { ?BZ][~n-Q
%Nn'p"
private static final int THRESHOLD = 10; /a|NGh%
7 f*_
/* <"+C<[n.
* (non-Javadoc) RM+E
* KRZV9AJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U.F65KaKF
*/ /nP=E
public void sort(int[] data) { 6;pREM+
int[] temp=new int[data.length]; MX0B$yc$
mergeSort(data,temp,0,data.length-1); T!a[@,)_
} j1kc&(
*]6dV'
private void mergeSort(int[] data, int[] temp, int l, int r) { `@D4?8_
int i, j, k; !gf3%!%
int mid = (l + r) / 2; UVJ(iNK"
if (l == r) VC(|t} L4
return; k>CtWV5B
if ((mid - l) >= THRESHOLD) ~m?~eJK#a
mergeSort(data, temp, l, mid); K-u/q6ufK
else j2Y(Q/i
insertSort(data, l, mid - l + 1); ;#i$0~lRl
if ((r - mid) > THRESHOLD) @GtZK
mergeSort(data, temp, mid + 1, r); kwR@oVR^
else vNSf:5H$
insertSort(data, mid + 1, r - mid); TMCA?r%Y\
w0Y%}7
for (i = l; i <= mid; i++) { wS0bk<(
temp = data; ?&m]du#6
} \Agg6tYr
for (j = 1; j <= r - mid; j++) { \W^+vuD8
temp[r - j + 1] = data[j + mid]; N=wy)+
} hob$eWgr
int a = temp[l]; n5/Tn7hY
int b = temp[r]; ?|GxVOl
for (i = l, j = r, k = l; k <= r; k++) { Dg+d=I?
if (a < b) { V^+:U>$w
data[k] = temp[i++]; 'e64%t
a = temp; oLMi vy4
} else { CWQ2iu<_0
data[k] = temp[j--]; m5aaY
b = temp[j]; ?\M6P?tpo&
} k&s7-yY
} Fd&!-`T?
} PZJ 4:h
F:S>\wG,
/** ]Hy PJ
* @param data ]/Qy1,
* @param l MwqT`;lb
* @param i a[g|APZz
*/ /$,=>
private void insertSort(int[] data, int start, int len) { Z<<gz[$+p
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f {Z%:H
} ja- ~`
} i%4k5[f.:
} ?(8%SPRk
} >1G*ya)
p30&JJ!~"
堆排序： yKEFne8^
]UT|BE4v
package org.rut.util.algorithm.support; gCr|e}w-
L_K\i?
import org.rut.util.algorithm.SortUtil; lY*]&8/=
O:tX0<6
/** /.YAFH|i)"
* @author treeroot oImgj4C2L
* @since 2006-2-2 ZCFf@2&z8
* @version 1.0 eSNSnh]'
*/ xcvr D
public class HeapSort implements SortUtil.Sort{ '#PqI)P
wKS-O%?
/* (non-Javadoc) gam#6 s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %`1CE\f
*/ uo'31V0
public void sort(int[] data) { ]~S+nlyd<
MaxHeap h=new MaxHeap(); !LOors za
h.init(data); *3`oU\r
for(int i=0;i h.remove(); DE\bYxJ
System.arraycopy(h.queue,1,data,0,data.length); uE#,c\[8
} g+ 1=5g
/:{_|P\
private static class MaxHeap{ ~uR6z//%
n,a5LR
void init(int[] data){ ]Bd3d%
this.queue=new int[data.length+1]; |EV\a[
for(int i=0;i queue[++size]=data; !FO^:V<|5
fixUp(size); #lshN,CPm
} 6mpg&'>
} pNE\@U|4E
@PoFxv
private int size=0; fCf#zV[
K}E7|gdG
private int[] queue; W#jZRviyq!
tWSvxGCzn%
public int get() { R=9~*9
return queue[1]; u@_!mjXQ
} {_XrZ(y/
o;4e)tK
public void remove() { ~@uY?jr
SortUtil.swap(queue,1,size--); TF0-?vBWh
fixDown(1); $W {yK+N
} ,mjfZ*N
file://fixdown gr`Ar;
private void fixDown(int k) { [}ZPg3Y
int j; G</I%qM
while ((j = k << 1) <= size) { vV6Lp
if (j < size %26amp;%26amp; queue[j] j++; SAG`^t
if (queue[k]>queue[j]) file://不用交换 K+@eH#Cv,(
break; ]8m_*I!
SortUtil.swap(queue,j,k); YP#AB]2\}
k = j; O(D5A?tv!
} A?IZ( Zx(`
} B(\r+"PB
private void fixUp(int k) { ^/C$L8#
while (k > 1) { 1 73<x){
int j = k >> 1; ,d>X/kd|o
if (queue[j]>queue[k]) ?7kV+{.
break; @9uYmkcV
SortUtil.swap(queue,j,k); g7 Md
k = j; -e{)v'C)
} oa &z/`@
} 9U=fJrj'u
12tJrS*Z
} ? %+VG
Uc&6=5~Ys\
} D,dHP-v
:qAc= IC%
SortUtil： =l8!VJa
833%H`jQc
package org.rut.util.algorithm; uojh%@.4
! nCjA\$
import org.rut.util.algorithm.support.BubbleSort; xv$)u<Ve
import org.rut.util.algorithm.support.HeapSort; JXL9Gge
import org.rut.util.algorithm.support.ImprovedMergeSort; @Xve qUUU
import org.rut.util.algorithm.support.ImprovedQuickSort; S0N2rU
import org.rut.util.algorithm.support.InsertSort; (lN;xT`=
import org.rut.util.algorithm.support.MergeSort; p<HTJ0
import org.rut.util.algorithm.support.QuickSort; HCJ8@nki
import org.rut.util.algorithm.support.SelectionSort; 9'n))%CZ.
import org.rut.util.algorithm.support.ShellSort; xi?P(sA
^$=tcoQG
/** :J Gl>V
* @author treeroot 'n^2|"$sH
* @since 2006-2-2 ;v,9v;T
* @version 1.0 1c)\
*/ %Ui{=920
public class SortUtil { \m=-8KpU
public final static int INSERT = 1; A \MfF
public final static int BUBBLE = 2; ` /I bWu
public final static int SELECTION = 3; !f\?c7
public final static int SHELL = 4; #ox9&
public final static int QUICK = 5; dU ,)TKQ
public final static int IMPROVED_QUICK = 6; $bZu^d,
public final static int MERGE = 7; *|LbbRu
public final static int IMPROVED_MERGE = 8; E[jXUOu-
public final static int HEAP = 9; 6.U"_%
)@Zc?Da
public static void sort(int[] data) { /`+Hwdk
sort(data, IMPROVED_QUICK); ~5r=FF6
} I(OAEIz
private static String[] name={ QN_)3lm
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" aJ:A%+1
}; |;A9A's
3:[!t%Yb
private static Sort[] impl=new Sort[]{ a[1sA12
new InsertSort(), Pqy-gWOv
new BubbleSort(), :cc[Jco@w
new SelectionSort(), }rzdm9
new ShellSort(), xdd:yrC
new QuickSort(), Gr5`1`8|
new ImprovedQuickSort(), ~@T+mHny
new MergeSort(), X0y?<G1(a
new ImprovedMergeSort(), i>Z|65
new HeapSort() ^uyNv-'F
}; E tJ~dL)
VLcyPM@"Q!
public static String toString(int algorithm){ 0LWdJ($?
return name[algorithm-1]; F+ffl^BQ
} 81g9ZV(4
Ro'jM0(KE
public static void sort(int[] data, int algorithm) { Md8(`@`o
impl[algorithm-1].sort(data); |Du,UY/
} >vlQ|/C
?. zu2
public static interface Sort { bK3B3r#$
public void sort(int[] data); |}_gA
} }FPM-M3y
{UB%(E[Mr
public static void swap(int[] data, int i, int j) { HUj+-
int temp = data; [O^}rUqq
data = data[j]; N0=-7wMk(Z
data[j] = temp; CE~r4
} f%2%T'Q
} hzaLx8L