[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; 7"xd'\c@
} _|TE )h
int i1=l; n/?5[O-D]
int i2=mid+1; 5.[{PJ]bq
for(int cur=l;cur<=r;cur++){ 9$Mi/eLG2N
if(i1==mid+1) dY\"'LtF
data[cur]=temp[i2++]; e|Sg?ocR
else if(i2>r) d0 V>;Q
data[cur]=temp[i1++]; XU9=@y+|v
else if(temp[i1] data[cur]=temp[i1++]; \Zf&&7v
else Ip4NkUI3T
data[cur]=temp[i2++]; sp**Sg)
} g@Ni!U"_c
} ITc/aX
aG}9Z8D
} h0.Fstf]
;6b#I$-J-
改进后的归并排序: @gi Y
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package org.rut.util.algorithm.support; iW"L!t#\|
1wc -v@E
import org.rut.util.algorithm.SortUtil; -'PpY302
;@d%<yMf@
/** XFu@XUk!K
* @author treeroot N0vd>b
* @since 2006-2-2 xk|$Oa
* @version 1.0 ~#a1]w
*/ @IiT8B
public class ImprovedMergeSort implements SortUtil.Sort { HnP;1Gi
RaU.yCYyu
private static final int THRESHOLD = 10; dWqFP
4(aesZ8h
/* 7-o=E=
* (non-Javadoc) \aZ(@eF@@Q
* 0='DDy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) : l>Ue&
*/ CY>NU
public void sort(int[] data) { rIb[gm)Rk
int[] temp=new int[data.length]; uCu,'F,6Y
mergeSort(data,temp,0,data.length-1); 3(5RUI-
} 2/7=@>|
+rT(
private void mergeSort(int[] data, int[] temp, int l, int r) { <go~WpA|r
int i, j, k; qz0v1057#
int mid = (l + r) / 2; 4[J3HLQ
if (l == r) ,#wVqBEk
return; L|q<Bpz
if ((mid - l) >= THRESHOLD) #h3+T*5} 6
mergeSort(data, temp, l, mid); 4{vd6T}V!
else \PLV]%3,
insertSort(data, l, mid - l + 1); 34oLl#q*
if ((r - mid) > THRESHOLD) <Y orQ>
mergeSort(data, temp, mid + 1, r); 44W3U~1
else <Y#R]gf1
insertSort(data, mid + 1, r - mid); !GIsmqVY
HQ s)T
for (i = l; i <= mid; i++) { Z@[,"{Sn
temp = data; Nr[Rp
} \OU+Kl<
for (j = 1; j <= r - mid; j++) { YjX=@
temp[r - j + 1] = data[j + mid]; O h"^
} i9xv`Ev=R
int a = temp[l]; W1@;94Sb~
int b = temp[r]; X#3<hN*v
for (i = l, j = r, k = l; k <= r; k++) { `U g.c
if (a < b) { 6#KI? 6
data[k] = temp[i++]; Dz50,*}J
a = temp; s^oNQ}
} else { &!a2%%1#N
data[k] = temp[j--]; WsV3>=@f
b = temp[j]; ) ,hj7
} \Zv =?\
} dI!/:x
} :7ngVc
# 0!IUSa
/** "B}08C,?
* @param data O0{
* @param l U]D.z}0
* @param i K%}I}8M
*/ Q*C4 q`
private void insertSort(int[] data, int start, int len) { zrew:5*uZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ziycyf.d
} Uu X"AFy~\
} e1loI8
} '&QT}B
} X}-H=1T?
f`,Hr?H
堆排序： .O#lab`:2
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package org.rut.util.algorithm.support; 8@aS9th$
GF!{SO4
import org.rut.util.algorithm.SortUtil; 12PE{Mut
lDU:EJ&DHE
/** !5OMAWNU@
* @author treeroot |I}+!DDuv
* @since 2006-2-2 SU'1#$69F
* @version 1.0 m[{&xF|_
*/ DP_Pqn8p&M
public class HeapSort implements SortUtil.Sort{ iFCH$!
I|IlFu?O=
/* (non-Javadoc) 4)iEj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ijqdZ+
*/ &{/>Sv!6#
public void sort(int[] data) { i`aG
MaxHeap h=new MaxHeap(); i 9tJHeSm
h.init(data); wDhcHB
for(int i=0;i h.remove(); 'h^DI`
System.arraycopy(h.queue,1,data,0,data.length); W>s'4C`
} C9H11g7{
<M OL{jan
private static class MaxHeap{ ,;P`Mf'YC
\u_v7g
void init(int[] data){ 4<g72| y
this.queue=new int[data.length+1]; >.hGoT!_k
for(int i=0;i queue[++size]=data; HCIF9{o1j>
fixUp(size); +Jka:]MW!
} px>>]>ZMH
} U9o*6`"o
Hs}"A,V
private int size=0; ]A]E)*
70 UgKE
private int[] queue; !(_xu{(DL
K2rS[Kdfaq
public int get() { z83:a)U
return queue[1]; 8}oDRN!J
} :ZfUjqRE
/Tf*d>Yh;
public void remove() { :_\!t45
SortUtil.swap(queue,1,size--); N^yO- xk
fixDown(1); b#;N!VX
} To8v#.i
file://fixdown ;]ShC\1
private void fixDown(int k) { ;~:Ryl M
int j; q AVfbcb
while ((j = k << 1) <= size) { .(dmuV9
if (j < size %26amp;%26amp; queue[j] j++; _d0-%B 9m
if (queue[k]>queue[j]) file://不用交换 dezL{:Ya
break; Vc52s+7=8
SortUtil.swap(queue,j,k); KO]?>>5S6
k = j; 7x7r!rSe,
} txfwLqx
} Pv-V7`{
private void fixUp(int k) { lzy$.H"W
while (k > 1) { DET!br'z5
int j = k >> 1; VtzmY
if (queue[j]>queue[k]) y5Wqu9C\Io
break; 0"<;You
SortUtil.swap(queue,j,k); %c&Ah
k = j; )|h;J4V
} <,X+`m&
} ?tC}M;~
1yaIV+_y/
} ~\:j9cC
Bx}0E
} &8_f'+i0
d+m6-4[_k
SortUtil： VVQ74b
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package org.rut.util.algorithm; N]s7/s
>,"D9!
import org.rut.util.algorithm.support.BubbleSort; !!+/Wgd:6
import org.rut.util.algorithm.support.HeapSort; 4'{hI;&a&
import org.rut.util.algorithm.support.ImprovedMergeSort; Fy_<Ui
import org.rut.util.algorithm.support.ImprovedQuickSort; itC *Z6^
import org.rut.util.algorithm.support.InsertSort; %I|+_ z&x
import org.rut.util.algorithm.support.MergeSort; vBnKu
import org.rut.util.algorithm.support.QuickSort; IQlw 914
import org.rut.util.algorithm.support.SelectionSort; 3dxnh,]&@
import org.rut.util.algorithm.support.ShellSort; yrE,,N%I
w-'D*dOi
/** _5U%'\5s
* @author treeroot RdvPsv}D
* @since 2006-2-2 ycl>git]
* @version 1.0 ]EVe@
*/ o3i,B),K
public class SortUtil { Xc9p;B>^Ts
public final static int INSERT = 1; <(bCz>o|
public final static int BUBBLE = 2; R%)2(\
public final static int SELECTION = 3; \o62OfF!
public final static int SHELL = 4; FU(}=5n
public final static int QUICK = 5; zhA',p@K?_
public final static int IMPROVED_QUICK = 6; ^iV`g?z
public final static int MERGE = 7; d#vSE.&
public final static int IMPROVED_MERGE = 8; 94h_t@Q/1
public final static int HEAP = 9; 0x]OF8=J
vNK`Y|u@
public static void sort(int[] data) { ezg^5o;
sort(data, IMPROVED_QUICK); p'Y&Z?8
} '?`@7Eol
private static String[] name={ 0V>ESyae5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" BDm88<]
}; PzMlua
u8<&F`7j
private static Sort[] impl=new Sort[]{ ;*wT,2;
new InsertSort(), <*A|pns
new BubbleSort(), /jjW/lr
new SelectionSort(), Ere?d~8
new ShellSort(), o8};e
new QuickSort(), 1Es*=zg
new ImprovedQuickSort(), Y0Hq+7x
new MergeSort(), }DDVGs[
new ImprovedMergeSort(), r sX$fU8
new HeapSort() TXd5v#_vo
}; oeu|/\+HW
daA47`+d
public static String toString(int algorithm){ P|e:+G7
return name[algorithm-1]; }&Wp3EWw
} |8DH4*y!
{z5V{M(|w3
public static void sort(int[] data, int algorithm) { vgh^fa!/
impl[algorithm-1].sort(data); j.=UI-&m
} |<j,Tr1[
08Pt(kzNA
public static interface Sort { ,Lt~u_lve
public void sort(int[] data); .g/ARwM}
} []A"]p
]k::J>84
public static void swap(int[] data, int i, int j) { YM#
int temp = data; Qq,i
data = data[j]; 6?1s`{yy
data[j] = temp; l)tTg+:
} 9*}iBs
} h*;g0QBkl