[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; nm-
} 2.D2 o
int i1=l; wq$$. .E
int i2=mid+1; tk&AZb,sP
for(int cur=l;cur<=r;cur++){ ;xZ+1zmL0
if(i1==mid+1) _MBhwNBxZ
data[cur]=temp[i2++]; hOY@vm&
else if(i2>r) >}+{;d
data[cur]=temp[i1++]; +e>SK!kB7
else if(temp[i1] data[cur]=temp[i1++]; #ibwD:{
else UK ':%LeL
data[cur]=temp[i2++]; ]n!V
} #\0m(v
} T/_u;My;
D&G6^ME
} i]v3CY|3AI
}QFL
改进后的归并排序: YThVG0I =
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package org.rut.util.algorithm.support; ,/\`Rc^n
2dD"^z{
import org.rut.util.algorithm.SortUtil; o,*m,Qc
/Y#8.sr
/** ;@wa\H[3v2
* @author treeroot g:o/^_
* @since 2006-2-2 uNN/o}Qx
* @version 1.0 ~}.C*;J
*/ x?Abk
public class ImprovedMergeSort implements SortUtil.Sort { y, l[v39
|_;kQ(,
private static final int THRESHOLD = 10; >Xn,jMUW
e~]P _53
/* I-]G{
* (non-Javadoc) ]9oj,k
* -9b=-K.y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1bFZyD"
*/ \p4*Q}t
public void sort(int[] data) { cNWmaCLN$
int[] temp=new int[data.length]; $*C }iJsF
mergeSort(data,temp,0,data.length-1); d@ZDIy
} h4hAzFQ.s
U%h.l
private void mergeSort(int[] data, int[] temp, int l, int r) { :zHSy&i`
int i, j, k; q"VmuQ
int mid = (l + r) / 2; yKML{N1D
if (l == r) o?baiOkH
return; .>"xp6
if ((mid - l) >= THRESHOLD) '12m4quO
mergeSort(data, temp, l, mid); qs]W2{-4~
else y\FQt];z)
insertSort(data, l, mid - l + 1); REh"/d
if ((r - mid) > THRESHOLD) 7X$CJ%6b
mergeSort(data, temp, mid + 1, r); iC#a+G*N_M
else '.v;/[0
insertSort(data, mid + 1, r - mid); -wn-PB@r
+~5Lo'^
for (i = l; i <= mid; i++) { o?a2wY^_
temp = data; L4po1
} /@`"&@W'
for (j = 1; j <= r - mid; j++) { Ua}R3^_)a
temp[r - j + 1] = data[j + mid]; x6/u+Urn
} Fp.eucRxP
int a = temp[l]; 7ys' [G|}r
int b = temp[r]; fbApE
for (i = l, j = r, k = l; k <= r; k++) { YEv\!%B
if (a < b) { If&))$7u
data[k] = temp[i++]; h% -=8l,
a = temp; JI@iT6.%IX
} else { awzlLI<2p
data[k] = temp[j--]; *d8 %FQ
b = temp[j]; C. .|O
} ]xS%Er
} ie1~QQ
} WI1YP0V
WL+EpNKSf
/** ;6V~yB
* @param data C6>_wl]
* @param l Y1Ql_
* @param i r*{.|>me
*/ \#[DZOI~
private void insertSort(int[] data, int start, int len) { [vr"FLM|9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]!ZZRe
} ! Vl)aL
} l7t
} (6fD5XtS
} -c>3|bo
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堆排序： PcsYy]Q/
mU[\//
package org.rut.util.algorithm.support; M&iXdw&
W%rUa&00
import org.rut.util.algorithm.SortUtil; O]IAIM
N1Y uLG:
/** @.L#u#
* @author treeroot ^C K!=oO
* @since 2006-2-2 |21VOPBS
* @version 1.0 $}4ao2
*/ D?BegF
public class HeapSort implements SortUtil.Sort{ r;@0F
=bp'5h8_
/* (non-Javadoc) /%g@ ;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~vYFQKrb
*/ "C}<umJ'
public void sort(int[] data) { Lum=5zDo
MaxHeap h=new MaxHeap(); D{t_65c-
h.init(data); 13@emb
for(int i=0;i h.remove(); :"y2u
System.arraycopy(h.queue,1,data,0,data.length); d\-*Fmp(S
} bM'F8Fi
+184|nJ<2
private static class MaxHeap{ /Igz[P^\9
h8WM4 PK
void init(int[] data){ X!V#:2JY
this.queue=new int[data.length+1]; GYtgw9 "Y
for(int i=0;i queue[++size]=data; )-I/ej^
fixUp(size); ]R~hzo
} GN(,`y
} +/_XSo
1TEKq#t;y
private int size=0; }se3y
|7K>`
private int[] queue; wKJ|;o4;L
?0 cv
public int get() { ByE@4+9
return queue[1]; [$} \Gv
} (e;/Smol
-V2f.QE%
public void remove() { bRggt6$z
SortUtil.swap(queue,1,size--); `\##M=
fixDown(1); {*;K>%r\o
} P*[wB_^&UP
file://fixdown E;H9]*x/
private void fixDown(int k) { pa^_D~
int j; H{*rV>%
while ((j = k << 1) <= size) { LT)I ?ud
if (j < size %26amp;%26amp; queue[j] j++; VOYQ<tg
if (queue[k]>queue[j]) file://不用交换 ydVDjE Y
break; Kf?:dF
SortUtil.swap(queue,j,k); ;P<h9(
k = j; UOj*Gt&
} sMLXn]m
} jc3Q3Th/zn
private void fixUp(int k) { k"=*'
while (k > 1) { h143HXBi1+
int j = k >> 1; O:'qwJ#~
if (queue[j]>queue[k]) rPr]f;
break; p/eaO{6 6
SortUtil.swap(queue,j,k); ZG+FX:v
k = j; AP`1hz4].-
} ~[F7M{LS
} K20Hh7cVJ
h}tC+_"D
} {ZdF6~+H(!
WNeBthq6
} $`2@
Y9-F\t=~
SortUtil： e1b?TF@lz
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package org.rut.util.algorithm; }T PyHq"
{\k }:)
import org.rut.util.algorithm.support.BubbleSort; B&7:=t,m(
import org.rut.util.algorithm.support.HeapSort; !Mgo~h"]#
import org.rut.util.algorithm.support.ImprovedMergeSort; eU)QoVt
import org.rut.util.algorithm.support.ImprovedQuickSort; G]$EIf'
import org.rut.util.algorithm.support.InsertSort; 6pb~+=3n
import org.rut.util.algorithm.support.MergeSort; R@uA4Al
import org.rut.util.algorithm.support.QuickSort; $6AzCq
import org.rut.util.algorithm.support.SelectionSort; <l!:#u
import org.rut.util.algorithm.support.ShellSort; tZx}/&m-
amExZ/
/** s;l"'6:_
* @author treeroot &E6V'*<93
* @since 2006-2-2 0)zJG |
* @version 1.0 <H#0pFB
*/ uF[*@N
public class SortUtil { _KtV`bF
public final static int INSERT = 1; YvuE:ia
public final static int BUBBLE = 2; V60"j(
public final static int SELECTION = 3; [zq2h3r
public final static int SHELL = 4; a;Pn.@NVq
public final static int QUICK = 5; '.N}oL<gP
public final static int IMPROVED_QUICK = 6; CY.92I@S
public final static int MERGE = 7; S~H>MtX(<
public final static int IMPROVED_MERGE = 8; EUh_`R
public final static int HEAP = 9; __+8wC
<_kA+&T
public static void sort(int[] data) { MSBrI3MqQ
sort(data, IMPROVED_QUICK); mJ(ElDG
} 3.P7GbN
private static String[] name={ Xf"< >M
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O8>&J-+2
}; raSga'uT;
2yFT` 5+H4
private static Sort[] impl=new Sort[]{ Yv)c\hm(7j
new InsertSort(), -{C Gn5]_#
new BubbleSort(), [n&ES\o#(
new SelectionSort(), 2wPc yD
new ShellSort(), \M|:EG%
new QuickSort(), _iDVd2X"H
new ImprovedQuickSort(), R i,_x
new MergeSort(), (GGosXU-v
new ImprovedMergeSort(), *_J{_7pwe
new HeapSort() _<F;&(o
}; N^wHO<IO1
=j~:u.hc'
public static String toString(int algorithm){ j+dQI_']x
return name[algorithm-1]; ;; {K##^l
} N(yd<Mw
vf#d
public static void sort(int[] data, int algorithm) { \et2aX !
impl[algorithm-1].sort(data); 0WKS
} RL\?i~'KH
<}'=@a
public static interface Sort { L<iRqayn
public void sort(int[] data); {_Ll'S
} X@:Y./
?*xH HI/
public static void swap(int[] data, int i, int j) { ~:0w%
int temp = data; oP4+:r)LKD
data = data[j]; <s\ZqL$f
data[j] = temp; 3` oOoKX
} >!lpI5'Z&
} E`@Z9k1 `