[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; 2f8fA'|O
} `B{N3Kxbp
int i1=l; [HJ^'/bB'
int i2=mid+1; ^zv0hGk2
for(int cur=l;cur<=r;cur++){ NJfI9L
if(i1==mid+1) KLW#+vZ
data[cur]=temp[i2++]; seh1(q?Va4
else if(i2>r) pei-R
data[cur]=temp[i1++]; .'md `@t
else if(temp[i1] data[cur]=temp[i1++]; x:W nF62
else ozZW7dveU
data[cur]=temp[i2++]; $=7[.z&
} 'u }|~u?m
} ;iJ*.wVq
F V8K_xj
} M),i4a?2
\IL/?J 5d
改进后的归并排序: a"^0;a
nPp\IE}:
package org.rut.util.algorithm.support; ^EGe%Fq*x]
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import org.rut.util.algorithm.SortUtil; QMoh<[3qu
bce>DLF
/** _&TA|Da
* @author treeroot %./vh=5)
* @since 2006-2-2 pqmS w
* @version 1.0 UPs*{m
*/ {_0m0 8
public class ImprovedMergeSort implements SortUtil.Sort { H#IJ&w|
zc&>RM
private static final int THRESHOLD = 10; -lr)z=})
eMk?#&a)
/* 6eSc`t&
* (non-Javadoc) 8_8r{a<xW
* 8OoKP4,;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `mTpL^f
*/ xSFY8
public void sort(int[] data) { V)M+dhl
int[] temp=new int[data.length]; Q}p+/-U\
mergeSort(data,temp,0,data.length-1); TfaL5evio
} L>~wcoB
%N#8D<ULd
private void mergeSort(int[] data, int[] temp, int l, int r) { Ek|#P{!
int i, j, k; >p4#AfGF
int mid = (l + r) / 2; &kKopJH
if (l == r) 6/^$SWd2
return; ',L>UIXw
if ((mid - l) >= THRESHOLD) 0e1W&
mergeSort(data, temp, l, mid); SoZ$1$o2
else Mg?^5`*
insertSort(data, l, mid - l + 1); Y!e
if ((r - mid) > THRESHOLD) 4.|-?qG
mergeSort(data, temp, mid + 1, r); %n-:mSus
else L&$ X\\Lv^
insertSort(data, mid + 1, r - mid); ~kUdHne(
W]kh?+SZ
for (i = l; i <= mid; i++) { G+N&(:
temp = data; R7: >'*F
} h|h-<G?>
for (j = 1; j <= r - mid; j++) { %?K1X^52d
temp[r - j + 1] = data[j + mid]; qdoJIP{
} iM;7V*u
int a = temp[l]; ?I{pv4G:
int b = temp[r]; ?;!d5Xuu
for (i = l, j = r, k = l; k <= r; k++) { BX :77?9,+
if (a < b) { aBk~/
data[k] = temp[i++]; o@TxDG
a = temp; H\7#$ HB
} else { &{${Fq
data[k] = temp[j--]; LB}y,-vX>
b = temp[j]; MW|Qop[
} NZ:A?h2JR
} OYKeu(=L
} OZ\]6]L
|_Vi8Ly
/** zlC|Spaf
* @param data AfmGA9
* @param l / sI0{
* @param i B0Ql1x#x
*/ 2_@vSwC
private void insertSort(int[] data, int start, int len) { !e?;f=1+E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8&FnXhZg4
} '`g#Zo
} t5dk}sRF
} MQc|j'vEY
} fpbb <Ro
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堆排序： xE(VyyR
Vy-N3L
package org.rut.util.algorithm.support; '^f,H1oW
?o'!(3`L
import org.rut.util.algorithm.SortUtil; n_5m+ 1N
L'k)
/** D<9FSxl6
* @author treeroot q]F2bo
* @since 2006-2-2 T1TKwU8l
* @version 1.0 b X.S`
*/ a f[<[2pma
public class HeapSort implements SortUtil.Sort{ QI*Y7R~<
IV$pA`|V
/* (non-Javadoc) s)Bl1\Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K5-wuD1
*/ lA[BV7.=7
public void sort(int[] data) { M&P?/Zi=L
MaxHeap h=new MaxHeap(); 4$Oakl*l
h.init(data); ~\A(xmW}
for(int i=0;i h.remove(); uJ jm50R<
System.arraycopy(h.queue,1,data,0,data.length); h=6Zvf<x
} [<m1xr4"k
7{HJjH!zx
private static class MaxHeap{ >r+Dl\R
Q]WjW'Ry\
void init(int[] data){ g{K*EL<
this.queue=new int[data.length+1]; ceN*wkGyB
for(int i=0;i queue[++size]=data; emp*j@9
fixUp(size); a4HUP*
} H^ _[IkuA%
} }RX[J0Prq~
L&3Ak}sh
private int size=0; &Rw4ub3
ql,k5.l
private int[] queue; !yAlb#yu
0ut/ ')[
public int get() { ;Awt:jF
return queue[1]; 5B3S]@%
} @[{9B6NlV
]`%}Q
public void remove() { 0#}Ed Q
SortUtil.swap(queue,1,size--); ^2-2Jz@
fixDown(1); x(J|6Ey7!n
} ;=goIsk{Q
file://fixdown nX(2&<
private void fixDown(int k) { [DS.@97n
int j; * SH5p
while ((j = k << 1) <= size) { Ua^#.K
if (j < size %26amp;%26amp; queue[j] j++; hl`4_`3y
if (queue[k]>queue[j]) file://不用交换 L{H` t{A
break; qN h:;`
SortUtil.swap(queue,j,k); },9Hq~TA
k = j; Y r6wYs(%
} -#Xo^-&
} '0QrM,B9
private void fixUp(int k) { dg[&5D1Q
while (k > 1) { o'Q"
int j = k >> 1; Q)eYJP=W
if (queue[j]>queue[k]) Rlc$2y@pU
break; ^NZq1c
SortUtil.swap(queue,j,k); K|Sh
k = j; /VFh3n>I2
} o^P/ -&T
} &'{6_-kh
/NvHM$5O%
} jWHv9XtW
sPMCN's
} ph*?y
F_>OpT
SortUtil： J3Ipk-'lx
64]_o/u5W4
package org.rut.util.algorithm; R42+^'af
*?sdWRbu}l
import org.rut.util.algorithm.support.BubbleSort; DC?U+
import org.rut.util.algorithm.support.HeapSort; u#9H
import org.rut.util.algorithm.support.ImprovedMergeSort; tkT:5O6
import org.rut.util.algorithm.support.ImprovedQuickSort; zN2CI6
import org.rut.util.algorithm.support.InsertSort; ~qFuS933
import org.rut.util.algorithm.support.MergeSort; gaFOm9y.e
import org.rut.util.algorithm.support.QuickSort; ?N*m2rv
import org.rut.util.algorithm.support.SelectionSort; E= 3Ui
import org.rut.util.algorithm.support.ShellSort; -/ 5" Py
| Q0Wv8/
/** qffVF|7
* @author treeroot fmqHWu*wG
* @since 2006-2-2 CK4C:`YG
* @version 1.0 TmI~P+5w
*/ \F`%vZrKR
public class SortUtil { }HdibCAOf
public final static int INSERT = 1; QD6<sw@]P
public final static int BUBBLE = 2; ~z;G$jd
public final static int SELECTION = 3; Zb> UY8
public final static int SHELL = 4; )fPN6x/e
public final static int QUICK = 5; S\$=b_.
public final static int IMPROVED_QUICK = 6; x-0O3IIE
public final static int MERGE = 7; tf1iRXf8
public final static int IMPROVED_MERGE = 8; 4:1URhE
public final static int HEAP = 9; Mn`);[
D^]g`V*N
public static void sort(int[] data) { .|ZO2MCd
sort(data, IMPROVED_QUICK); 1 Hw%DJ
} [2h4%{R&
private static String[] name={ | ]#PF*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" IIj :\?r
}; 2G=prS`s
ySkz5K+|g
private static Sort[] impl=new Sort[]{ GYp}V0
new InsertSort(), "d1~(0=6<m
new BubbleSort(), Cp!bsasj
new SelectionSort(), e`]x?t<U4/
new ShellSort(), k*xMe-
new QuickSort(), KK-}&N8
new ImprovedQuickSort(), VsIDd}~C%
new MergeSort(), Y52f8qQq
new ImprovedMergeSort(), {|!> {
new HeapSort() },r9f MJ
}; _x+)Tv
;ZOu-B]q
public static String toString(int algorithm){ JU>F&g/|
return name[algorithm-1]; 'YFy6rds
} +!"GYPUXy
0oT~6BGm
public static void sort(int[] data, int algorithm) { a!?JVhD&
impl[algorithm-1].sort(data); 8.`*O
} },eV?eGj
t,D7X1W
public static interface Sort { f2*e&+LjTP
public void sort(int[] data); WdtZ{H
} Y6+/_$N4|
(FVHtZi7
public static void swap(int[] data, int i, int j) { H\r- ;,&
int temp = data; @$G{t^&os
data = data[j]; Ms>CO7Nvy
data[j] = temp; 3UR'*5|'
} -] @cUx
} q8m[ S4Q]g