[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; >V$ Gx>I
} ])}]/Qw
int i1=l; <hx+wrv
int i2=mid+1; t0)<$At6J
for(int cur=l;cur<=r;cur++){ :j^FJ@2_
if(i1==mid+1) x@KZ]
data[cur]=temp[i2++]; i'#Gy,R
else if(i2>r) 4 %W:
data[cur]=temp[i1++]; bZ1 78>J]
else if(temp[i1] data[cur]=temp[i1++]; yuhnYR\`m
else ~*W!mlg
data[cur]=temp[i2++]; sN6N >{
} {{yZ@>o6
} D5,P)[
Wwujh2g"0|
} >znRyQ~bM
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改进后的归并排序: ?OlV"zK
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package org.rut.util.algorithm.support; alq%H}FF
vVl; |
import org.rut.util.algorithm.SortUtil; tmUFT
kwpK1R4zs
/** eKvV*[Na
* @author treeroot i0jBZW"_1$
* @since 2006-2-2 'T<iHV&
* @version 1.0 }Gyqq6Aeb
*/ VVP:w%yW
public class ImprovedMergeSort implements SortUtil.Sort { hvka{LD
sarq`%zrk
private static final int THRESHOLD = 10; ',^+bgs5
Uyx!E4pl(
/* -Go 7"j
* (non-Javadoc) r.ZF_^y}+
* L|@y&di
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qqrq11W
*/ svf|\p>]H
public void sort(int[] data) { !V2/A1?
int[] temp=new int[data.length]; sZGj"_-Hzu
mergeSort(data,temp,0,data.length-1); B=8Iu5m
} GVHV =E
\;u@"
private void mergeSort(int[] data, int[] temp, int l, int r) { qt%D'
int i, j, k; b` Hz$8
int mid = (l + r) / 2; )B,|@ynu
if (l == r) 1K,1X(0rL8
return; \^7C0R-hX
if ((mid - l) >= THRESHOLD) OyV<u@[i
mergeSort(data, temp, l, mid); L@`ouQ"sa
else ~w8JH2O
insertSort(data, l, mid - l + 1); sm[94,26
if ((r - mid) > THRESHOLD) ';Zi@f"
mergeSort(data, temp, mid + 1, r); z4M9M7)"
else ?;/^Ya1;Z
insertSort(data, mid + 1, r - mid); $Iv2j">3)
W"^wnGa@a
for (i = l; i <= mid; i++) { a<}#HfC;'
temp = data; ]0hrRA`
} Mj[f~
for (j = 1; j <= r - mid; j++) { JRCrZW}
temp[r - j + 1] = data[j + mid]; >{\7&}gz
} )XcOl7XLN
int a = temp[l]; W@|6nPm
int b = temp[r]; +)o}c"P!
for (i = l, j = r, k = l; k <= r; k++) { EF3Cdu{]P
if (a < b) { $/!{OU.t`
data[k] = temp[i++]; H"ZZ.^"5FV
a = temp; ;22oY>w
} else { M@0;B30L
data[k] = temp[j--]; [kE."#
b = temp[j]; 7i&:DePM'q
} T^J>ZDA
} 0d8%T<=J
} GFr|E8
\+aC"#+0
/** 5onm]V]
* @param data 2^i(gaXUQ
* @param l g1t0l%_7^
* @param i y WV#Up
*/ AL>$HB$
private void insertSort(int[] data, int start, int len) { Jgnhn>dHe
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o sKKt?^?
} 23~Sjr
} Xy5e5K
} 8Q_SRwN
} >jD[X5Y
4Y[1aQ(%
堆排序： (}}S9K
W`c'=c
package org.rut.util.algorithm.support; M Y|w
yX~v-N!X
import org.rut.util.algorithm.SortUtil; y+7w,m2
~NW32 O)/
/** \7CGUB>L
* @author treeroot ai0XL}!+
* @since 2006-2-2 h@a+NE8
* @version 1.0 c y8;@[#9
*/ lRXK\xIP ,
public class HeapSort implements SortUtil.Sort{ zc[Si bT
LD!Q8"
/* (non-Javadoc) GvBHd%Ot
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #8)*1?
*/ ;Iq/l%vX
public void sort(int[] data) { l+V>]?j
MaxHeap h=new MaxHeap(); ~6p[El#tS
h.init(data); JH7<
for(int i=0;i h.remove(); &RfC"lc
System.arraycopy(h.queue,1,data,0,data.length); *QH28%^
} ynbuN x*
AM!G1^c
private static class MaxHeap{ rS;Dmm
7Hs%Cc"
void init(int[] data){ cFJY^A
this.queue=new int[data.length+1]; E~6c-Lw
for(int i=0;i queue[++size]=data; Hro-d1J7
fixUp(size); Dd\jHF>u
} R rda# h^
} rW=Z>1
AJ=qna
private int size=0; EVGt 5z
+llR204
private int[] queue; !jTcsN%
Y=Kc'x[,Zj
public int get() { "men
return queue[1]; &G-!qxe
} .X;3,D[w
/{&tY:;m
public void remove() { bD?VU<)3
SortUtil.swap(queue,1,size--); R~PA1wDZ
fixDown(1); #)nSr
} Om5Y|v"*
file://fixdown s=;uc]9g
private void fixDown(int k) { u?}(P_9
int j; b}"N`,0dO
while ((j = k << 1) <= size) { ynQ: >tw
if (j < size %26amp;%26amp; queue[j] j++; P09;ng67
if (queue[k]>queue[j]) file://不用交换 Hg=";,J
break; ZusEfh?
SortUtil.swap(queue,j,k); P(f0R8BE
k = j; I"A_b}~*}
} GaK-t*Q
} e7sp =I,
private void fixUp(int k) { <P=twT;P
while (k > 1) { qHrc9fB
int j = k >> 1; +8RgF
if (queue[j]>queue[k]) VcXq?f>\
break; ()6wvu}
SortUtil.swap(queue,j,k); >7QvK3S4%
k = j; =Lf,?"S
} XzEc2)0'v
} eLfk\kk]Pc
XMxSQ B1
} H<PtAYFS
tg<EY!WY
} vbyH<LPz5
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SortUtil： bAx-"Lu
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package org.rut.util.algorithm; 24z< gO
&tg&5_
import org.rut.util.algorithm.support.BubbleSort; FG.em
import org.rut.util.algorithm.support.HeapSort; +nJgl8'^y
import org.rut.util.algorithm.support.ImprovedMergeSort; 2h5nMI]'
import org.rut.util.algorithm.support.ImprovedQuickSort; +lHjC$
import org.rut.util.algorithm.support.InsertSort; t%E!o0+8Z
import org.rut.util.algorithm.support.MergeSort; iT2B'QI=<
import org.rut.util.algorithm.support.QuickSort; J4fi'
import org.rut.util.algorithm.support.SelectionSort; ,[P{HrHx
import org.rut.util.algorithm.support.ShellSort; hpO`]
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/** ?#}N1k\S
* @author treeroot =A83W/4
* @since 2006-2-2 e&&53?
* @version 1.0 BRgXr
*/ JvVWG'Z"
public class SortUtil { cj$[E]B3V*
public final static int INSERT = 1; UG+d-&~Ll
public final static int BUBBLE = 2; 5kCUaPu
public final static int SELECTION = 3; v|dBSX9k0
public final static int SHELL = 4; wea-zN
public final static int QUICK = 5; b4[bL2J$h1
public final static int IMPROVED_QUICK = 6; H9YW
public final static int MERGE = 7; Y^$X*U/q%U
public final static int IMPROVED_MERGE = 8; Y 0d<~*
public final static int HEAP = 9; t gI{`jS%
TFlet"ge=
public static void sort(int[] data) { j+$rj
sort(data, IMPROVED_QUICK); ]:XoRyIZ1[
} ,$s8GAmq
private static String[] name={ n\*!CXc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |)(VsVG&
}; E&2OD [iX
S4Y&
private static Sort[] impl=new Sort[]{ l]Ax:Z
new InsertSort(), }fb#G<3
new BubbleSort(), +BETF;0D
new SelectionSort(), TQpfQ
new ShellSort(), dfKF%27
new QuickSort(), ,!#*GZ.ix
new ImprovedQuickSort(), C~2F9Pg
new MergeSort(), v0z5j6)-1
new ImprovedMergeSort(), a&/#X9/
new HeapSort() p<2L.\6"
}; 6dabU*
J8uLJ
public static String toString(int algorithm){ v+46QK|I&
return name[algorithm-1]; :XZU&Sr"
} tn(JC%?^
,)Me
public static void sort(int[] data, int algorithm) { MQ5R O;RY
impl[algorithm-1].sort(data); T@2#6Tffo
} m% -g~q
f$e[u Er
public static interface Sort { 7puFz4+f
public void sort(int[] data); ObVGV
} CZud& <
6Ypc`
public static void swap(int[] data, int i, int j) { Ql/cN%^j$
int temp = data; v$7QIl_/7
data = data[j]; Mm.<r-b
data[j] = temp; _aGOb;h
} WA)yfo0A
} l?Udn0F