[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; Z|C,HF+m.
} )>1}I_1j)
int i1=l; H[hJUR+#
int i2=mid+1; %"v:x?d$$o
for(int cur=l;cur<=r;cur++){ Gl>\p
if(i1==mid+1) D`@a*YIq
data[cur]=temp[i2++]; wKpBH}
else if(i2>r) Q$ew.h
data[cur]=temp[i1++]; N~flao^
else if(temp[i1] data[cur]=temp[i1++]; Nqj@p<y/q
else 4 *}H3-`
data[cur]=temp[i2++]; vCi`htm%
} zH~P-MqC
} MJiVFfYW
ntH`\ )xi
} F2 B(PGa7
h|]cZMGo
改进后的归并排序: OpaRQ=
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package org.rut.util.algorithm.support; [@9S-$Xa
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import org.rut.util.algorithm.SortUtil; >s5}pkAv|e
=J1V?x=l@
/** pK-tj
* @author treeroot }ex4dhx2M
* @since 2006-2-2 (W h)Ov"
* @version 1.0 {Lal5E4-
*/ lOcFF0'
public class ImprovedMergeSort implements SortUtil.Sort { \'Ca1[y@B
HK :K~h
private static final int THRESHOLD = 10; lPR^~&/
;-`NT` #2
/* SY5}Bu#
* (non-Javadoc) @K!JE w\
* pG"wQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7V5c`:"
*/ eHvUgDt
public void sort(int[] data) { d2eXN3"
int[] temp=new int[data.length]; XB!qPh.
mergeSort(data,temp,0,data.length-1); ;)h?P.]
} :!s7B|_U
*KNfPh#wi}
private void mergeSort(int[] data, int[] temp, int l, int r) { :PBFFLe
int i, j, k; ,G0"T~
int mid = (l + r) / 2; [KR%8[e
if (l == r) ^S`hKv&87
return; 2n3&uvf'TL
if ((mid - l) >= THRESHOLD) f5F-h0HF`[
mergeSort(data, temp, l, mid); I;rW!Hb
else B0yJ9U= Fj
insertSort(data, l, mid - l + 1); C5^WJx[
if ((r - mid) > THRESHOLD) q>(?Z#sB
mergeSort(data, temp, mid + 1, r); lt-3OcC
else Y\WQ0'y
insertSort(data, mid + 1, r - mid); 1Z ~C3)T=
?jz\[0)s
for (i = l; i <= mid; i++) { WD\Yx~o
temp = data; m4~ |z
} B](R(x>L
for (j = 1; j <= r - mid; j++) { Ze>R@rK
temp[r - j + 1] = data[j + mid]; P Ptmh. }e
} 5{(4%
int a = temp[l]; .+S%hT,v6i
int b = temp[r]; Zq&'a_
for (i = l, j = r, k = l; k <= r; k++) { K3\a~_0
if (a < b) { +%TgX&a
data[k] = temp[i++]; 4v>SXch
a = temp; `^/8dIya
} else { Ub f5:
data[k] = temp[j--]; P<X?
b = temp[j]; Khd A;bF
} ! $mY.uu
} kttJTP77t
} ^[SW07o~
aPlEM_escS
/** uxn+.fA
* @param data mC@v,"
* @param l <xSh13<
* @param i &-FG}|*4M
*/ =c\(]xX
private void insertSort(int[] data, int start, int len) { f|(9+~K/7&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Il4]1d|
} MOh&1]2j5
} ~x(|'`
} iLv -*%%
} 3r#['UmT
:%9R&p:'ar
堆排序： P7W|e~]Yq
?,7!kTRH
package org.rut.util.algorithm.support; Es#:0KH].v
]v}W9{sY
import org.rut.util.algorithm.SortUtil; vfn[&WN]
FVkl#Qy~
/** 5uG^`H@X
* @author treeroot e46`"}r
* @since 2006-2-2 |pZ7k#%
* @version 1.0 ]8wm1_qV
*/ PeIi@0vA
public class HeapSort implements SortUtil.Sort{ Lk]|;F-2i
9h+Hd&=
/* (non-Javadoc) ,j>FCj>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @7"n X
*/ 9=$pV==
public void sort(int[] data) { JAKs [@:
MaxHeap h=new MaxHeap(); 3mofp`e
h.init(data); nygGI_[l
for(int i=0;i h.remove(); HD#>K 7
System.arraycopy(h.queue,1,data,0,data.length); ;39a`
} zd2_k 9
0kCo0{+n
private static class MaxHeap{ c;/vzIJj
VF11eZ"
void init(int[] data){ qbSI98rw
this.queue=new int[data.length+1]; g$C]ln>"9m
for(int i=0;i queue[++size]=data; p=UW ^95
fixUp(size); 075IW"p'
} clyp0`,7
} Y(`Bc8h
*YH!L{y
private int size=0; ):4)8@]5M
x`+M#A()/
private int[] queue; 5"40{3
\nP79F0%2
public int get() { o=94H7@
return queue[1]; (rJ-S"^u
} 3}g>/F~
,F->*=
public void remove() { G6{PrV#
SortUtil.swap(queue,1,size--); kD+#|f
fixDown(1); Zs}h>$E5_B
} PW%ith1)<
file://fixdown -*[)CR-{
private void fixDown(int k) { 8IL5:7H8
int j; v -)<nox
while ((j = k << 1) <= size) { <(TAA15Xol
if (j < size %26amp;%26amp; queue[j] j++; Ep;?%o,G
if (queue[k]>queue[j]) file://不用交换 SJ22
break; cM9>V2:P
SortUtil.swap(queue,j,k); <,p$eQ)T%
k = j; #O~pf[[L
} yn+m,K/
} xcl;~"c*
private void fixUp(int k) { 6(?@B^S>2
while (k > 1) { D1deh=
int j = k >> 1; ?>ZrdfTwz,
if (queue[j]>queue[k]) C$q-WoTM(
break; `}P9[HP
SortUtil.swap(queue,j,k); 27[e0 j
k = j; d< XY"Y%
} .$d:c61X
} +KExK2=
3,i`FqQa
} >cjxu9Vr1K
%r6_['T
} D->E&#
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SortUtil： H/[(T%]o
1Zk1!> ?
package org.rut.util.algorithm; N1g;e?T':
k}kwr[
import org.rut.util.algorithm.support.BubbleSort; wp8-(E^
import org.rut.util.algorithm.support.HeapSort; VIGLl'8p
import org.rut.util.algorithm.support.ImprovedMergeSort; 0)PZS>
import org.rut.util.algorithm.support.ImprovedQuickSort; aVVE2:M
import org.rut.util.algorithm.support.InsertSort; gjK: a@{
import org.rut.util.algorithm.support.MergeSort; tculG|/
import org.rut.util.algorithm.support.QuickSort; NI:OL
import org.rut.util.algorithm.support.SelectionSort; |9 *$6Y
import org.rut.util.algorithm.support.ShellSort; yTbtS-
K; hP0J
/** c 3| Lk7Q
* @author treeroot ML$#&Z@ *7
* @since 2006-2-2 j&.JAQ*2;
* @version 1.0 Tf$>^L
*/ N0D5N(kH%
public class SortUtil { +NB5Fd4
public final static int INSERT = 1; k-*k'S_
public final static int BUBBLE = 2; A ?~4Pe
public final static int SELECTION = 3; *WzPxQ_
public final static int SHELL = 4; v(sS$2J|}
public final static int QUICK = 5; # 6?2 2Os
public final static int IMPROVED_QUICK = 6; WH $*\IGJL
public final static int MERGE = 7; *x#5S.i1
public final static int IMPROVED_MERGE = 8; ?OO !M
public final static int HEAP = 9; `ALQSo~l
u0+<[Ia'q
public static void sort(int[] data) { )('{q}JxV
sort(data, IMPROVED_QUICK); Nt<Ac&6 s
} WpI5C,3Z!l
private static String[] name={ U!"RfRD.<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S)2Uoj
}; hZe9Y?)
3PzF^8KJ
private static Sort[] impl=new Sort[]{ )086u8w )y
new InsertSort(), bX`]<$dr3
new BubbleSort(), S=w~bz,/
new SelectionSort(), *0a7H$iQ(]
new ShellSort(), S +73 /Vs
new QuickSort(), bw#\"uJ
new ImprovedQuickSort(), }LIf]YK
new MergeSort(), 9%P$e=Ui#
new ImprovedMergeSort(), '+^XL6$L
new HeapSort() 8fWnKWbbjw
}; UU =,Brb
pek5P4W_
public static String toString(int algorithm){ N9Fu
return name[algorithm-1]; HwMe^e;
} |])Ko08*tE
7V\M)r{q7
public static void sort(int[] data, int algorithm) { r_a1oO:
impl[algorithm-1].sort(data); \gZjq]3
} +(q r{G?
,qgR+]?({
public static interface Sort { 7BA9zs392
public void sort(int[] data); aJNsJIY+
} ).C>>1ZC
k|_ >I
public static void swap(int[] data, int i, int j) { mxvV~X%
int temp = data; a5g1.6hF
data = data[j]; 79lG~BGE
data[j] = temp; ?0E-Lac=
} "0"8Rp&V|
} IP1{gMG