[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; g;p]lVx=>
} z3F ^OU
int i1=l; 8R!3}kx
int i2=mid+1; }mGOEG|F2
for(int cur=l;cur<=r;cur++){ X`xI~&t_
if(i1==mid+1) MYVUOd,
data[cur]=temp[i2++]; bpe8 `b(#
else if(i2>r) b1X.#pz7F
data[cur]=temp[i1++]; nq'vq]]
else if(temp[i1] data[cur]=temp[i1++]; "= H.$ +
else >&uG1q0p.
data[cur]=temp[i2++]; [y^)&L$=
} Zmx[u_NG
} !: e0cV
FN$hEc!
} 'vgO`
NF?FEUoxz
改进后的归并排序: ,p(4OZz5,
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package org.rut.util.algorithm.support; >;E[XG^
qg7] YT&
import org.rut.util.algorithm.SortUtil; sOyWsXd+R'
iz|mJUx
/** w1zI"G~4/Q
* @author treeroot `i{k^Q
* @since 2006-2-2 e"jA#Y #
* @version 1.0 IKJ~sw~AQ
*/ O5"o/Y~m
public class ImprovedMergeSort implements SortUtil.Sort { c[=%v]j:u
.aRL'1xHl
private static final int THRESHOLD = 10; U3ygFW%
OL+!,Y
/* 6~g:"}
* (non-Javadoc) 7ko7)"N
* tE)%*z@<Lt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H>AzxhX[n
*/ KR
public void sort(int[] data) { ":,HY)z
int[] temp=new int[data.length]; wf7<#jIq
mergeSort(data,temp,0,data.length-1); 47Y|1
} C,C=W]G
!'14mN#A
private void mergeSort(int[] data, int[] temp, int l, int r) { vPG!S{4
int i, j, k; $s2-O!P?
int mid = (l + r) / 2; Z$R2Z$f
if (l == r) {HqwpB\@
return; Q9K+k*?{N
if ((mid - l) >= THRESHOLD) ':,6s
mergeSort(data, temp, l, mid); nsyg>=j
else "?j|;p@!>
insertSort(data, l, mid - l + 1); [7Nn%eZC
if ((r - mid) > THRESHOLD) >/"XX,3
mergeSort(data, temp, mid + 1, r); mRCgKW<
else D#%J||
insertSort(data, mid + 1, r - mid); 3)f=Z2U>
Q, E!Ew3
for (i = l; i <= mid; i++) { i_GE9A=h
temp = data; !DnG)4#
} z(< E %
for (j = 1; j <= r - mid; j++) { M3Kpp_d_!
temp[r - j + 1] = data[j + mid]; Q:+Y-&||"
} :C42yQAP
int a = temp[l]; ;U<)$5
int b = temp[r]; 0:G@a&Lr
for (i = l, j = r, k = l; k <= r; k++) { e,E;\x &
if (a < b) { K. G#[
data[k] = temp[i++]; Pyi PhOJe
a = temp; v\Y;)/!
} else { !W:QLOe6F
data[k] = temp[j--]; 6\86E$f=h
b = temp[j]; 'OGOT0(
} PqcuSb6
} Tu_dkif'
} OxF\Hm)(
ZNB*Azi
/** +2oZB]GPL
* @param data \Y9=dE}
* @param l ^J>28Q\S
* @param i ~E^EF{h
*/ gx[#@(
private void insertSort(int[] data, int start, int len) { M;MD-|U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _|8"&*T^
} *Oz5I
} | 7>1)
} RA[` Cp"
} !w f N~.Y
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堆排序： 5d}PrYa
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package org.rut.util.algorithm.support; S=aXmz<
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import org.rut.util.algorithm.SortUtil; Cu;X{F'H
q1dYiG.-Z
/** 5, Yk5?l<'
* @author treeroot v,>F0ofJ
* @since 2006-2-2 aic6,>\!'
* @version 1.0 {>FA ~}cX.
*/ &P3B
public class HeapSort implements SortUtil.Sort{ B_5q}Bp<
Wr)%C
/* (non-Javadoc) >mF`XbS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8KWTd
*/ `?JrC3
public void sort(int[] data) { #<'/sqL
MaxHeap h=new MaxHeap(); N83RsL "}_
h.init(data); :o}7C%Q8
for(int i=0;i h.remove(); x6DH0*[.
System.arraycopy(h.queue,1,data,0,data.length); =hl-c
} $Z28nPd/
}Tc)M_
private static class MaxHeap{ `"ie57-
A94VSUDA:
void init(int[] data){ <2cq 0*$
this.queue=new int[data.length+1]; p'w[5'
for(int i=0;i queue[++size]=data; [F/xU
fixUp(size); '&<-,1^L
} Zl,K#
} OD1ns
r)j#Skh].
private int size=0; R:.7c(s
^\+6*YE 4
private int[] queue; I:6xDDpZG`
KktTR`W
public int get() { RM<\bZPc
return queue[1]; M2xUs
} bkOm/8k|4
5 #kvb$97
public void remove() { !d(!1fC
SortUtil.swap(queue,1,size--); g<.8iW 'c
fixDown(1); D[-Ct
} 0_]aF8j
file://fixdown 0)2lBfHQ&
private void fixDown(int k) { wG{obsL.!
int j; VGvOwd)E
while ((j = k << 1) <= size) { v>R.M"f
if (j < size %26amp;%26amp; queue[j] j++; V)(pe #P
if (queue[k]>queue[j]) file://不用交换 w@:o:yLS
break; [\.>BK
SortUtil.swap(queue,j,k); gdG: &{|x
k = j; ))KsQJ"V
} +$ -#V
} ^cAJCbp7
private void fixUp(int k) { " c
while (k > 1) { Ck^=H
int j = k >> 1; 1$Hf`h2
if (queue[j]>queue[k]) (u'/tNGS
break; wUV%NZB
SortUtil.swap(queue,j,k); LB{a&I LG
k = j; 8 Zj>|u
} 6nq.~f2`
} ',&MYm\
!<X_XA
} ?,8b-U#A1
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} blPC"3}3Vd
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SortUtil： & {/u>,
fzio8mKVX
package org.rut.util.algorithm; uBMNkN8
=H?Nb:s
import org.rut.util.algorithm.support.BubbleSort; G?_,(
import org.rut.util.algorithm.support.HeapSort; 5g5pzww
import org.rut.util.algorithm.support.ImprovedMergeSort; ,pG63&?j
import org.rut.util.algorithm.support.ImprovedQuickSort; '#Fh J%x
import org.rut.util.algorithm.support.InsertSort; U92hv~\
import org.rut.util.algorithm.support.MergeSort; #62ww-E~
import org.rut.util.algorithm.support.QuickSort; T a[74;VO
import org.rut.util.algorithm.support.SelectionSort; *oWzH_
import org.rut.util.algorithm.support.ShellSort; =N0cz%
H5%I?ZXw4
/** Qv=Z
* @author treeroot _k@l-Bj
* @since 2006-2-2 #FQVhgc
* @version 1.0 U{}7:&As
*/ Z"^@B2v
public class SortUtil { enrmjA&3
public final static int INSERT = 1; E<4}mSn)
public final static int BUBBLE = 2; .KLuGb3JJ
public final static int SELECTION = 3; t&uHn5
public final static int SHELL = 4; 5.E 2fX
public final static int QUICK = 5; $G}Q}f
public final static int IMPROVED_QUICK = 6; W P&zF$
public final static int MERGE = 7; "|%fAE
public final static int IMPROVED_MERGE = 8; E4.IS=4S
public final static int HEAP = 9; +]zP $5_e
CKur$$B
public static void sort(int[] data) { O^$Zz<
sort(data, IMPROVED_QUICK); m{yON&y
} syfR5wc
private static String[] name={ Bx)&MYY}[[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4%7*tVG
}; 4>HGwk@+8
sP |i'
private static Sort[] impl=new Sort[]{ OE"Bb
new InsertSort(), *Wau7
new BubbleSort(), M:$nL
new SelectionSort(), }.vy|^X
new ShellSort(), K!~](_W!
new QuickSort(), <>oW f
new ImprovedQuickSort(), Z}C%%2Iz
new MergeSort(), 0A9cu,ZdUR
new ImprovedMergeSort(), /km3L7L%R
new HeapSort() *X-$* ~J0
}; ;CZcY] ol
BYf"l8^,
public static String toString(int algorithm){ h:NXO'
return name[algorithm-1]; !;a<E:
} i5"q1dRQ
iD`XD\.?
public static void sort(int[] data, int algorithm) { mTgn}rXk
impl[algorithm-1].sort(data); @$R a
} 8gxLL59
q}i87a;m
public static interface Sort { y^rg%RV
public void sort(int[] data); !/zj7z !
} B" z5j
hH/O2
public static void swap(int[] data, int i, int j) { g1|c?#fwo
int temp = data; UXJl;Mb
data = data[j]; ~-%A@Lt
data[j] = temp; n}?G!ySg
} 7A6sSfPUy
} }b(e