[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; X!Z)V)@J8
} {oqbV#/&
int i1=l; %42a>piev
int i2=mid+1; %LMpErZO
for(int cur=l;cur<=r;cur++){ G(a5@9F
if(i1==mid+1) RhE~Rwbx
data[cur]=temp[i2++]; tr<fii3<
else if(i2>r) mF;mJq<d
data[cur]=temp[i1++]; 9Y,JYc#
else if(temp[i1] data[cur]=temp[i1++]; GP%V(HhN
else }N[X<9^Z
data[cur]=temp[i2++]; zkRAul32|
} Z&n[6aV'F
} F<I*?${[
;98&5X\u<
} [nO3%7t@
$K^l=X
改进后的归并排序: #h[>RtP:
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package org.rut.util.algorithm.support; w[-)c6JyE
wN!\$i@E:
import org.rut.util.algorithm.SortUtil; P?h1nxm`'
T/'z,,Y
/** $IE}fgA@5
* @author treeroot Z0L($
* @since 2006-2-2 AabQ)23R2
* @version 1.0 =PRQ3/?5
*/ ,-AF8BP
public class ImprovedMergeSort implements SortUtil.Sort { Czjb.c:a.Y
L\2"1%8Wj
private static final int THRESHOLD = 10; H[~ D]RG}'
"#O9ij
/* d&NnpjH}c
* (non-Javadoc) ynIC (t
* uB I/3aQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g{]6*`/Z
*/ #%;Uh
public void sort(int[] data) { .]vb\NBK7
int[] temp=new int[data.length]; |eu8;~A
mergeSort(data,temp,0,data.length-1); ytIPY7E
} oVpZR$
I8gNg Z
private void mergeSort(int[] data, int[] temp, int l, int r) { 5b}w
int i, j, k; S&!(h {O
int mid = (l + r) / 2; jKml:)k
if (l == r) ?kO.>o
return; g5nJ0=9
if ((mid - l) >= THRESHOLD) +LRKS
mergeSort(data, temp, l, mid); be8T<F
else 0/su`
insertSort(data, l, mid - l + 1); {nKw<F2
if ((r - mid) > THRESHOLD) :|W=2(>
mergeSort(data, temp, mid + 1, r); UT\4Xk<
else %P0
insertSort(data, mid + 1, r - mid); 0&,D&y%
hQ@k|3=Re
for (i = l; i <= mid; i++) { t.9s49P
temp = data; (.:*GUg
} 3*h"B$g!
for (j = 1; j <= r - mid; j++) { lJdBUoO
temp[r - j + 1] = data[j + mid]; (fF8)4l
} wo0j/4o
int a = temp[l]; O^MI073Q>t
int b = temp[r]; \t!~s^Oox
for (i = l, j = r, k = l; k <= r; k++) { &4-;;h\H
if (a < b) { 8 MO-QO
data[k] = temp[i++]; +F)-n2Bi
a = temp; ./F:]/Mt
} else { =5\*Zh1
data[k] = temp[j--]; %'iJVFF
b = temp[j]; 1#=9DD$4
} h <4`|Bg+
} ,'s}g,L
} ?62Im^1/
qLCNANWnd
/** 9A"s7iJ)
* @param data 'SXHq>#gA
* @param l o.ZR5`.
* @param i a.V5fl0?I@
*/ CV @P +
private void insertSort(int[] data, int start, int len) { fd )v{OC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P2'N4?2
} (mIjG)4t
} p]mN)
} {mJ' Lb0;
} r:bJU1P1$s
'[WL8,.Q
堆排序： 9f! M1
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package org.rut.util.algorithm.support; }:2##<"\t
^m#tWb)f
import org.rut.util.algorithm.SortUtil; T[SK>z
)$!b`u
/** i#la'ICwJ
* @author treeroot eUy*0
* @since 2006-2-2 &[[r|
* @version 1.0 Nm"P8/-09
*/ NBPP?\1
public class HeapSort implements SortUtil.Sort{ !i"zM}
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/* (non-Javadoc) :K6JrS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W0f^!}f(
*/ PLkS-B
public void sort(int[] data) { yJI~{VmU7
MaxHeap h=new MaxHeap(); 3=d%WPgQ
h.init(data); +4:eb)e
for(int i=0;i h.remove(); ^sf,mM~D
System.arraycopy(h.queue,1,data,0,data.length); !5}}mf
} M{L- V
s`$}xukT
private static class MaxHeap{ &3t973=
H7Q$k4\l
void init(int[] data){ /9pxEidVAS
this.queue=new int[data.length+1]; ?h[HC"V/2
for(int i=0;i queue[++size]=data; {'M<dI$
fixUp(size); -Rpra0o. C
} <[[yV
} yUnV%@.
7W)W9=&BT
private int size=0; \E?3nQM
nB`|VYmOP1
private int[] queue; %&6QUv^
D|ceZ <9x
public int get() { 1D'r;`z
return queue[1]; 8{ZTHY-
} @/s|<*
5?^#v
public void remove() { r]!#v{#.
SortUtil.swap(queue,1,size--); k;^$Pd?t
fixDown(1); Uoe{,4T
} 4:/V|E\D
file://fixdown 4gen,^Ij
private void fixDown(int k) { ^.6yzlY
int j; )g'J'_Sl
while ((j = k << 1) <= size) { V*@aE
if (j < size %26amp;%26amp; queue[j] j++; RB %+|@c
if (queue[k]>queue[j]) file://不用交换 t1w]L
break; +;~N; BT
SortUtil.swap(queue,j,k); WAxNQfEe
k = j; X<,QSTP
} }[akj8U
} #KiJ{w'
private void fixUp(int k) { W_}j~[&
while (k > 1) { I(*3n"
int j = k >> 1; I,hw0e
if (queue[j]>queue[k]) :6Nb,Hh~
break; 1%v6d !
SortUtil.swap(queue,j,k); |<u+Xi ~
k = j; cANt7
} cTq@"v di
} 4G,FJjE`p
2 q4p-
} 9K@I
&\9%;k
} J3mLjYy
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SortUtil： <mFDC?j
m+!.H\
package org.rut.util.algorithm; J!l/.:`6
<W#G)c0
import org.rut.util.algorithm.support.BubbleSort; [_JdV(]$
import org.rut.util.algorithm.support.HeapSort; vi}16V84l
import org.rut.util.algorithm.support.ImprovedMergeSort; Ca'BE#q
import org.rut.util.algorithm.support.ImprovedQuickSort; 44u)F@)
import org.rut.util.algorithm.support.InsertSort; Yk|6?e{+)
import org.rut.util.algorithm.support.MergeSort; +g g_C'"
import org.rut.util.algorithm.support.QuickSort; !CU-5bpu
import org.rut.util.algorithm.support.SelectionSort; DU\ytD`u
import org.rut.util.algorithm.support.ShellSort; YIRe__7-NU
n}UJ-\$
/** q=W.82.U
* @author treeroot >+J}mo=*
* @since 2006-2-2 wnC} TWxX
* @version 1.0 !An?<Sv$
*/ fM ID}S
public class SortUtil { zb{79Os[B
public final static int INSERT = 1; A M[f
public final static int BUBBLE = 2; zd[k|lj
public final static int SELECTION = 3; 3JGrJ!x
public final static int SHELL = 4; D\_nqx9O
public final static int QUICK = 5; 3WP\MM
public final static int IMPROVED_QUICK = 6; RFRXOyGz$
public final static int MERGE = 7; Ef`'r))
public final static int IMPROVED_MERGE = 8; B{)#A?Rh.
public final static int HEAP = 9; \ UrD%;sq
h,$CJdDY]
public static void sort(int[] data) { HDV-qYD|O~
sort(data, IMPROVED_QUICK); R5ra*!|L)
} ~2k.x*$
private static String[] name={ z0rYzn?MR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cjN)3L{
}; F\r"Y)|b=
v)Y)tu>
private static Sort[] impl=new Sort[]{ K@7%i|H
new InsertSort(), U*~-\jN1pb
new BubbleSort(), , @jtD*c)
new SelectionSort(), DujVV(+I
new ShellSort(), LG:k}z/T
new QuickSort(), mI7lv;oN<5
new ImprovedQuickSort(), <XLaJ;j
new MergeSort(), d0)]^4HT|y
new ImprovedMergeSort(), ?+.mP]d_
new HeapSort() #A5X,-4G
}; UE^o}Eyg
=Q<VU/
public static String toString(int algorithm){ aM $2lR])J
return name[algorithm-1]; ')v,<{
} O4X03fUx
gbzBweWF
public static void sort(int[] data, int algorithm) { sY!JB7!j
impl[algorithm-1].sort(data); Ypzmc$Xfu
} F{jxs/~
J+t51B(a
public static interface Sort { O(I^:_eH
public void sort(int[] data); Xr K29a
} %w^*7Oi
A{s-g>s
public static void swap(int[] data, int i, int j) { t[TM\j0jW
int temp = data; iQ" LIeD
data = data[j]; 3g4=as4w
data[j] = temp; fJr EDj4(
} Cdz?+hb
} oW^x=pS9