[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; y:C=Ni&,"
} A/WmVv6
int i1=l; 1MntTIT
int i2=mid+1; KdBE[A-1^M
for(int cur=l;cur<=r;cur++){ EWcqMD]4u
if(i1==mid+1) S< TUZ /;
data[cur]=temp[i2++]; )SX2%&N
else if(i2>r) @-L4<=$J
data[cur]=temp[i1++]; 0 `Yg
else if(temp[i1] data[cur]=temp[i1++]; Cb`2"mpWS
else *B$$6'hi`
data[cur]=temp[i2++]; N ,8^AUJ3&
} #@quuiYq
} #:UP'v=w
5$Q}Zxh
} u$vA9g4
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改进后的归并排序: riy@n<Z4
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package org.rut.util.algorithm.support; +>w %j&B
p!b_tyJ
import org.rut.util.algorithm.SortUtil; a9+l:c@
M,uQ8SZA[
/** v;%>F)I
* @author treeroot d*M:PjG@
* @since 2006-2-2 C(4r>TNm
* @version 1.0 /t4#-vz
*/ Wu{cE;t
public class ImprovedMergeSort implements SortUtil.Sort { vs*Q {
##_`)/t,
private static final int THRESHOLD = 10; lhp.zl
^V5VRGq
/* JemB[
* (non-Javadoc) dKG2f
* lRy^Wp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /=+y[y3`
*/ 53g(:eB
public void sort(int[] data) { `oPUf!
int[] temp=new int[data.length]; vv F:
mergeSort(data,temp,0,data.length-1); d=*&=r0!C{
} O/N Ed)H!
,MmX(O0
private void mergeSort(int[] data, int[] temp, int l, int r) { D|8Pe{`
int i, j, k; r+yl{
int mid = (l + r) / 2; wjRv=[
if (l == r) T@{}!
return; y)Y0SY1\j
if ((mid - l) >= THRESHOLD) q'% cVM
mergeSort(data, temp, l, mid); 8<2 [ F
else $G,#nh2 oD
insertSort(data, l, mid - l + 1); n'i~1pM,?
if ((r - mid) > THRESHOLD) UP+4xG
mergeSort(data, temp, mid + 1, r); 4^OPzg6Z%p
else bvR0?xnq
insertSort(data, mid + 1, r - mid); {&I3qk2(
6 _Cc+}W
for (i = l; i <= mid; i++) { `S&.gPE2
temp = data; UA%tI2
} 4:50dj
for (j = 1; j <= r - mid; j++) { n/zTS3<
temp[r - j + 1] = data[j + mid]; UHaY|I${U
} 20NotCM
int a = temp[l]; <$:Hf@tpMo
int b = temp[r]; oiKY2.yW
for (i = l, j = r, k = l; k <= r; k++) { n[`KhRN
if (a < b) { #_U[T
data[k] = temp[i++]; 5nQxVwY
a = temp; Z1&<-T_
} else { u/,ng&!
data[k] = temp[j--]; gf]k@-)
b = temp[j]; 2B!Bogs
} 4u.v7r
} '^6jRI,
} i*3*)ly
+{7/+Zz
/** ;_TPJy
* @param data an<loLW
* @param l $bho]~
* @param i "m'roU
*/ &%infPI'
private void insertSort(int[] data, int start, int len) { sf(2~BMQI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U6sPJc<
} bS2)L4MQY
} $I$ B8
} V`,tu `6
} 9Q.}jV
ww^!|VVa
堆排序： &>KZ4%&?
aR@s. ll
package org.rut.util.algorithm.support; o;^k"bo6
wq6.:8Or-]
import org.rut.util.algorithm.SortUtil; [<!4 a
XW2{I.:in>
/** Dau'VtzN
* @author treeroot kbR!iPM-;
* @since 2006-2-2 8 FJ>W.
* @version 1.0 m0$~O5|4
*/ q>^x,:L
public class HeapSort implements SortUtil.Sort{ RY\[[eG
! ,v!7I
/* (non-Javadoc) zmEg4v'I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FKVf_Ncf%
*/ wgV?1S>Z
public void sort(int[] data) { c c^I9g~
MaxHeap h=new MaxHeap(); :TTZ@ q
h.init(data); u@ psVt
for(int i=0;i h.remove(); s${|A=
System.arraycopy(h.queue,1,data,0,data.length); )V6<'>1WZ
} #1#?k
p>#QFd"m
private static class MaxHeap{ Ac,Qj`'V
uLK4tQ
void init(int[] data){ LNU#NJ^Axt
this.queue=new int[data.length+1]; tXu_o6]
for(int i=0;i queue[++size]=data; OqW (C
fixUp(size); UwQyAD]Ht
} jykY8;4
} 8t$w/#'@
qEW3k),
private int size=0; :~gG]|F
q n2X._`
private int[] queue; 12bt\h9
~,: FZ1wh
public int get() { gb,X"ODq
return queue[1]; g5,Bj
} __Tg1A
3ug-cq
public void remove() { _w\A=6=q|
SortUtil.swap(queue,1,size--); a{deN9Qn
fixDown(1); ' 6#en9{L
} Kz`g Q|S
file://fixdown { :~&#D
private void fixDown(int k) { #383W)n
int j; =u,8(:R]s
while ((j = k << 1) <= size) { hiM nU
if (j < size %26amp;%26amp; queue[j] j++; tPb$ua|
if (queue[k]>queue[j]) file://不用交换 B[8`l} t
break; pndAXO:v
SortUtil.swap(queue,j,k); P!*G"^0<
k = j; A@I( &Z
} C2/B1ba
} }vGWlNd#g
private void fixUp(int k) { PE7D)!d T
while (k > 1) { fZ6"DJZ
int j = k >> 1; 1p%75VW
if (queue[j]>queue[k]) Vr1yj
break; zG0191f
SortUtil.swap(queue,j,k); VBe.&b8
k = j; )?zlhsu}1;
} <Jwx|
} QT\=>,Fz _
u+ ?Wm40E
} Tz"Xm/Gy
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} 7B"*< %<
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SortUtil： 4{Q{>S*h
ivb?B,Lz0
package org.rut.util.algorithm; =Co[pt
q0a8=o"|
import org.rut.util.algorithm.support.BubbleSort; I\FBf&~
import org.rut.util.algorithm.support.HeapSort; %x2_njDd
import org.rut.util.algorithm.support.ImprovedMergeSort; 2U Q&n`A
import org.rut.util.algorithm.support.ImprovedQuickSort; i;GF/pi
import org.rut.util.algorithm.support.InsertSort; 0zCmU)ng
import org.rut.util.algorithm.support.MergeSort; l2lyi
import org.rut.util.algorithm.support.QuickSort; TODTR7yGo
import org.rut.util.algorithm.support.SelectionSort; m+ww
import org.rut.util.algorithm.support.ShellSort; ; wpX
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/** ~t` uq
* @author treeroot -T0@b8
* @since 2006-2-2 &LD=Zp%
* @version 1.0 9BA*e-[
*/ }bZcVc2
public class SortUtil { !eH9LRp
public final static int INSERT = 1; gq+|Hr
public final static int BUBBLE = 2; S#9EBw7
public final static int SELECTION = 3; ?8O %k<?
public final static int SHELL = 4; *;noZ9{"+
public final static int QUICK = 5; ;*Z.|?3MM
public final static int IMPROVED_QUICK = 6; g=gWkN <
public final static int MERGE = 7; -3)]IA
public final static int IMPROVED_MERGE = 8; `c)//o
public final static int HEAP = 9; i7UE9Nyl*
>cE@m=[
public static void sort(int[] data) { .e,(}_[[<
sort(data, IMPROVED_QUICK); A3#^R%2)W
} bx5f\)
private static String[] name={ @-ms_Z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" NPFrn[M$
}; R;{y]1u
r-,P
private static Sort[] impl=new Sort[]{ |~Op|gs
new InsertSort(), 0';U3:=i,
new BubbleSort(), ,8vqzI
new SelectionSort(), P`$"B0B)
new ShellSort(), OK6c"*<z
new QuickSort(), #w *]`5 T
new ImprovedQuickSort(), #go!"HL
new MergeSort(), l\NVnXv:>
new ImprovedMergeSort(), P0 va=H
new HeapSort() +F9)+wT~;q
}; V:wx@9m)
Bn5O;I13
public static String toString(int algorithm){ Y\sSW0ZX
return name[algorithm-1]; mg)ZoC
} I\|x0D
n> >!dg Og
public static void sort(int[] data, int algorithm) { wy1xZQ<5
impl[algorithm-1].sort(data); a+--2+~=
} O6[,K1,
Y5Ub[o
public static interface Sort { ?<l,a!V'6
public void sort(int[] data); z'(][SB
} J!5>8I(_wX
)0Lno|l
public static void swap(int[] data, int i, int j) { ^Iz(V2
int temp = data; V\ 7O)g
data = data[j]; C]xKdPQj%
data[j] = temp; Y@+e)p{
} 9AxeA2/X
} KqE5{ q