[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; 3DO ^vV
} T]Eg9Y:+v
int i1=l; Tj*Vk $}0
int i2=mid+1; onAC;<w
for(int cur=l;cur<=r;cur++){ 6o/!H
if(i1==mid+1) UDz#?ZWnd
data[cur]=temp[i2++]; C_DXg-a2lu
else if(i2>r) P ".[=h
data[cur]=temp[i1++]; ep2#a#&'
else if(temp[i1] data[cur]=temp[i1++]; t<2B3&o1
else N-Nq*
data[cur]=temp[i2++]; GE[J`?E]
} #!X4\+)
} VBK9te,A
nZ2mY!*
} ^8yhx-mgb
wtw
改进后的归并排序: gNG_,+=!
]RJcY1
package org.rut.util.algorithm.support; r|tTDKGQ
XZFM|=%X
import org.rut.util.algorithm.SortUtil; @eGJ_J
2U;ImC1g
/** S @'fmjA'
* @author treeroot eO:wx.PW
* @since 2006-2-2 IZkQmA=
* @version 1.0 -?$Hr\
*/ z!GLug*j`
public class ImprovedMergeSort implements SortUtil.Sort { qEoa%O
?xuhN G@
private static final int THRESHOLD = 10; J,k|_JO
}XiV$[xHd
/* .UuCTH;6`
* (non-Javadoc) n^AQ!wC
* 2& l~8,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zLxO\R!d
*/ "NamP\hj
public void sort(int[] data) { [nam H a
int[] temp=new int[data.length]; X_eh+>D
mergeSort(data,temp,0,data.length-1); =i/7&gC
} }t[?g)"M#-
_JjR= m
private void mergeSort(int[] data, int[] temp, int l, int r) { O:Fnxp5@
int i, j, k; 1c} %_Z/
int mid = (l + r) / 2; A%pBvULH
if (l == r) ,NQucp
return; D|}%(N@sl
if ((mid - l) >= THRESHOLD) Ol~jq;75
mergeSort(data, temp, l, mid); U h'1f7%
else Q~A25Jf.
insertSort(data, l, mid - l + 1); 2=TQU33#
if ((r - mid) > THRESHOLD) Uva b*9vX
mergeSort(data, temp, mid + 1, r); (*Jcx:rH
else .(0'l@#fT
insertSort(data, mid + 1, r - mid); -&u2C}4s
&K_"5.7-56
for (i = l; i <= mid; i++) { y[s* %yP3l
temp = data; 8)D5loS
} 8_S<zE`Ha
for (j = 1; j <= r - mid; j++) { !kl9X-IiI
temp[r - j + 1] = data[j + mid]; <4{,u1!t
} L"akV,w4p
int a = temp[l]; y%21`y&Os
int b = temp[r]; '@ym-\,
for (i = l, j = r, k = l; k <= r; k++) { w7?&eF(w(
if (a < b) { &ESE?{of)
data[k] = temp[i++]; ]iyJ>fC
a = temp; ESl-k2
} else { u2SnL$A7
data[k] = temp[j--]; #l6L7u0~wC
b = temp[j]; (CRY$+d
} S(c,Sinc
} e[HP]$\
} ,&;#$ b5
?]'Rz\70
/** v:MJF*/
* @param data F8J;L](Dq
* @param l 8v},&rhPQq
* @param i \o-Q9V
*/ 1Y"[Qs]"mU
private void insertSort(int[] data, int start, int len) { v(T;Y=&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v(?^#C>6W
} ,iXE3TN;W
} Cw<bu|?
} .~+I"V{yF
} d?RKobk
8$:4~:]/
堆排序： >g!a\=-[
n1n1}
package org.rut.util.algorithm.support; OKU9v{
dcMWCK
import org.rut.util.algorithm.SortUtil; #HD$=ECcw
x:`]uOp
/** 0Dj<-n{9
* @author treeroot ;IC:]Zu
* @since 2006-2-2 T [ `t?,
* @version 1.0 ?8g[0/
*/ p!MOp-;-
public class HeapSort implements SortUtil.Sort{ }xx[=t=nUf
IS`1}i$1%
/* (non-Javadoc) Ixhe86-:T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NrE&w H:
*/ t>J 43
public void sort(int[] data) { ANNfL9:Jy
MaxHeap h=new MaxHeap(); pJC@}z^cw
h.init(data); PK#; \Zw
for(int i=0;i h.remove(); _7(>0GY
System.arraycopy(h.queue,1,data,0,data.length); aHosu=NK
} Ctpr.
#%4-zNS
private static class MaxHeap{ #{)=%5=c
=}Np0UP
void init(int[] data){ )1%l$W
this.queue=new int[data.length+1]; >5{Z'UWxh
for(int i=0;i queue[++size]=data; lHBk&UN'
fixUp(size); >yC1X|d~t
} +$KUy>
} Np4';H
Hmt}@
private int size=0; nYJ)M AG@
KJPCO0"
private int[] queue; \$Xo5f<
12\h| S~
public int get() { !Pf_he
return queue[1]; <0OZ9?,dm
} >=|Dir
6Y^UC2TBs
public void remove() { }Yt/e-Yg%r
SortUtil.swap(queue,1,size--); CA7ZoMB#
fixDown(1); hr&&"d {s
} m}\G.$h4
file://fixdown ;/$=!9^sZ
private void fixDown(int k) { D2o,K&V
int j; 3fJGJW!zu
while ((j = k << 1) <= size) { f>k<I[C<
if (j < size %26amp;%26amp; queue[j] j++; ]iewukB4
if (queue[k]>queue[j]) file://不用交换 0z@KkU{Z
break; a%"mgCB
SortUtil.swap(queue,j,k); '!*,JG5_
k = j; +H5=zf2
} gWm -}Nb4
} i1]*5;q
private void fixUp(int k) { $Q,Fr; B
while (k > 1) { \2(Uqf#_
int j = k >> 1; `9a %vN
if (queue[j]>queue[k]) Fp>iwdjFg
break; h}&WBN
SortUtil.swap(queue,j,k); T8& kxp
k = j; ,bhOIuep3
} fZK&h.
} ezRhSN?
(H/JB\~r
} pi)7R:i
w%jc' ;|
} %N#8D<ULd
lP*_dt9
SortUtil： Y4cIYUSc
USLG G}R
package org.rut.util.algorithm; okfGd= &
}J27Y;Zp9
import org.rut.util.algorithm.support.BubbleSort; {-*+G]
import org.rut.util.algorithm.support.HeapSort; :_;9&[H9ha
import org.rut.util.algorithm.support.ImprovedMergeSort; kwRXNE(k]_
import org.rut.util.algorithm.support.ImprovedQuickSort; tz&'!n}
import org.rut.util.algorithm.support.InsertSort; h2g|D(u)
import org.rut.util.algorithm.support.MergeSort; ">vxYi
import org.rut.util.algorithm.support.QuickSort; !+tz<9BBY
import org.rut.util.algorithm.support.SelectionSort; m\>531&
import org.rut.util.algorithm.support.ShellSort; j4j %r(
w5 nzS)B:u
/** MP/6AAt7=|
* @author treeroot T#'+w@Q9{9
* @since 2006-2-2 J-t5kU;L{
* @version 1.0 #9aB3C
*/ 1&A@Zo5|
public class SortUtil { W99MA5P
public final static int INSERT = 1; 07WZ w1(;
public final static int BUBBLE = 2; a+!#cQl
public final static int SELECTION = 3; x/*ndH
public final static int SHELL = 4; 4.)hCb
public final static int QUICK = 5; +b_g,RNs!
public final static int IMPROVED_QUICK = 6; 7=yC*]BH-=
public final static int MERGE = 7; @/i;/$\
public final static int IMPROVED_MERGE = 8; %N 8/g]`7
public final static int HEAP = 9; Rg3 Lo ?
PZZTRgVc
public static void sort(int[] data) { VT1Nd
sort(data, IMPROVED_QUICK); J(+I`
} <fq?{z
private static String[] name={ MW|Qop[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" NZ:A?h2JR
}; OYKeu(=L
OZ\]6]L
private static Sort[] impl=new Sort[]{ Ei!5Qya>
new InsertSort(), dn0?#=
new BubbleSort(), ]m}<0-0
new SelectionSort(), SE=3`rVJ
new ShellSort(), j+0=)Q%I=
new QuickSort(), dIiQ^M
new ImprovedQuickSort(), pp{Za@j
new MergeSort(), smEKQHB
new ImprovedMergeSort(), rW$ )f
new HeapSort() E-,/@4k
}; EU?)AxH^
1<#J[$V
public static String toString(int algorithm){ #~J)?JL
return name[algorithm-1]; q{/>hvl
} v'Y)~Kv@!
pE{ZWW[@+
public static void sort(int[] data, int algorithm) { ,H!E :k
impl[algorithm-1].sort(data); L~N<<8?\
} ]O Nf;RH
l$KC\$?%*
public static interface Sort { 5:(uD3]
public void sort(int[] data); g3~e#vdz
} rZ<n0w
S;DqM;Q
public static void swap(int[] data, int i, int j) { v;.7-9c*
int temp = data; kL;sA'I:S
data = data[j]; [4uTp[U!r
data[j] = temp; <4,hrx&.
} ,4$ZB(\
} L{fKZ