[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; 2dkWzx
} aEvbGo
int i1=l; )LIn1o_,
int i2=mid+1; +:-xV
for(int cur=l;cur<=r;cur++){ )J> dGIb
if(i1==mid+1) $/D?Vw:]
data[cur]=temp[i2++]; NytTyk)
else if(i2>r) ^@O7d1&y
data[cur]=temp[i1++]; )!\6 "{
else if(temp[i1] data[cur]=temp[i1++]; Xi) ;dcNJ
else rMi\#[oB
data[cur]=temp[i2++]; GRbbU#/=G
} "q+Z*
} Qd kus214
QfAmGDaYQ
} tEvDAI} 5
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改进后的归并排序: T+&fUhSy
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package org.rut.util.algorithm.support; [B+F}Q^;
6>rz=yAM_
import org.rut.util.algorithm.SortUtil; A1-,b.Ni
\ *[Ht!y
/** P.@dB.Ny
* @author treeroot 7Tdx*1 U
* @since 2006-2-2 ?x&}ammid
* @version 1.0 #f24a?n|
*/ 5l1R")0`t_
public class ImprovedMergeSort implements SortUtil.Sort { K+!e1 '
bUm%#a
private static final int THRESHOLD = 10; jaodcT0
IRx%L?
/* 7$Z_'GJ]1C
* (non-Javadoc) 5(J?C-Pk
* D^6iQW+.P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,o%by5j"^N
*/ V~j^
public void sort(int[] data) { sV,Yz3E<u$
int[] temp=new int[data.length]; 1L4-;HYJm
mergeSort(data,temp,0,data.length-1); aYT!xdCI
} ~LpkA`Hn!
p03I&d@w>
private void mergeSort(int[] data, int[] temp, int l, int r) { ;Y;r%DJ
int i, j, k; LX7P?j
int mid = (l + r) / 2; |~ fI=1;;x
if (l == r) te-xhJ&K
return; +] ;WN
if ((mid - l) >= THRESHOLD) 6`Tx meIP
mergeSort(data, temp, l, mid); FsJk"$}
else 3`%E;?2
insertSort(data, l, mid - l + 1); n4S`k%CI
if ((r - mid) > THRESHOLD) xw}yl4WT{
mergeSort(data, temp, mid + 1, r); .Ji9j[[#D
else h>D;QY
insertSort(data, mid + 1, r - mid); trwQ@7
EA>.SSs!
for (i = l; i <= mid; i++) { #0b:5.vy
temp = data; X/2GTU7?
} 8Lx/ZGy
for (j = 1; j <= r - mid; j++) { VfpT5W<
temp[r - j + 1] = data[j + mid]; B._YT
} r/'!#7dLG-
int a = temp[l]; |{kbc0*
int b = temp[r]; lr~ |=}^
for (i = l, j = r, k = l; k <= r; k++) { ial{A6X
if (a < b) { 4x[_lsj
data[k] = temp[i++]; rIcgf1v70
a = temp; yjL+1_"B
} else { ~:7y!=8#
data[k] = temp[j--]; R)JH D7 1
b = temp[j]; ub~ t}
} ^.8~}TT-U
} z~vcwiYAP
} GWuKDq
G)I` M4}*n
/** nL=+`aq_
* @param data Yft [)id
* @param l C}mhnU@
* @param i ,H+Y1N4W(
*/ U[x$QG6m!
private void insertSort(int[] data, int start, int len) { F><_gIT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mN]WjfII
} ;UTM9.o[
} Q&r.wV|
} -fFtHw:kHh
} C_Q3^mLx
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堆排序： JH]S'5X8K
07:V[@'
package org.rut.util.algorithm.support; ~M^[
L5x;#\#p
import org.rut.util.algorithm.SortUtil; WyatHC
?K7uy5Y
/** r6uN6XCM
* @author treeroot "NA<^2W@J
* @since 2006-2-2 XyN " Jr
* @version 1.0 $+GDPYm'
*/ u*2?Gky
public class HeapSort implements SortUtil.Sort{ *w4#D:g
S:j{R^$k
/* (non-Javadoc) %P s.r{%{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Vq]ixag2^
*/ i;9X_?QF
public void sort(int[] data) { 2_HIn
MaxHeap h=new MaxHeap(); Qf^c}!I
h.init(data); ;&6 {c
for(int i=0;i h.remove(); yZNG>1N
System.arraycopy(h.queue,1,data,0,data.length); BZQ}c<Nl
} oFP8s[B
ugTsI~aE
private static class MaxHeap{ E5rV}>(Y
fV>d_6Lf}
void init(int[] data){ YT+b{
this.queue=new int[data.length+1]; a_P|KRl
for(int i=0;i queue[++size]=data; >"!ScYn
fixUp(size); 0}e?hbF%U
} @!dIa1Q"
} *1["x;A
$?W2'Xm!V
private int size=0; q}L`8(a
?lD)J?j
private int[] queue; ;&CLb`<y
./XX
public int get() { SZe55mK`
return queue[1]; ;@qS#7SRB
} >Vt2@Ee
rz_W]/G-P
public void remove() { *t| !xO
SortUtil.swap(queue,1,size--); gC2}?nq*
fixDown(1); 3E;@.jD
} KHZ[drb6$
file://fixdown d]s^?=gM
private void fixDown(int k) { asYk#;z\"
int j; ~;CNWJtcf(
while ((j = k << 1) <= size) { \ZADY.ha
if (j < size %26amp;%26amp; queue[j] j++; q&z'S
if (queue[k]>queue[j]) file://不用交换 oB5\^V$
break; >R]M:Wx
SortUtil.swap(queue,j,k); V4jMx[
k = j; cX C[O
} GgY8\>u
} #fa,}aj
private void fixUp(int k) { ;GG,Z#\m
while (k > 1) { c|.te]!ds
int j = k >> 1; rmA?Xlh\
if (queue[j]>queue[k]) d*{Cv2A.
break; <!RkkU& 6
SortUtil.swap(queue,j,k); 34!.5^T
k = j; KX9IC5pR
} 7mYcO3{5{
} +^(_S9CO
RD[P|4eY
} J.h` 0$!
/gF)msUF
} ^OQP;5 #K
2LUsqL\m}.
SortUtil： N2s"$Ttq
}UsH#!9.
package org.rut.util.algorithm; %pq.fZI
G?$o+Y'F
import org.rut.util.algorithm.support.BubbleSort; ^L$`)Ja
import org.rut.util.algorithm.support.HeapSort; VnW6$W?g
import org.rut.util.algorithm.support.ImprovedMergeSort; bdstxjJ`
import org.rut.util.algorithm.support.ImprovedQuickSort; :5/Ue,~ag
import org.rut.util.algorithm.support.InsertSort; EF:ec9 .
import org.rut.util.algorithm.support.MergeSort; dlfjx
import org.rut.util.algorithm.support.QuickSort; 5&Yt=)c\
import org.rut.util.algorithm.support.SelectionSort; zs]ubJC@
import org.rut.util.algorithm.support.ShellSort; C8|Ls(4Ck
+ GQ{{B
/** $,by!w'e:l
* @author treeroot D%o(HS\E
* @since 2006-2-2 x+4K,r;
* @version 1.0 |x1OWm1:<
*/ t'eu>a1D
public class SortUtil { *O'|NQhNx>
public final static int INSERT = 1; b>p_w%d[[J
public final static int BUBBLE = 2; -y!Dg6A
public final static int SELECTION = 3; :'Gn?dv|
public final static int SHELL = 4; <jJ'T?,
public final static int QUICK = 5; 05ClPT\BCr
public final static int IMPROVED_QUICK = 6; `Z,WKus
public final static int MERGE = 7; ek<B=F
public final static int IMPROVED_MERGE = 8; 9*I[q[>9
public final static int HEAP = 9; =JE<oVP8
wicsf<]
public static void sort(int[] data) { #Q7:Mu+
sort(data, IMPROVED_QUICK); L^t%p1R
} DlCN
private static String[] name={ Wo&22,EB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" LAk .f
}; "W6cQsi
?9{^gW4|
private static Sort[] impl=new Sort[]{ el5Pe{j'
new InsertSort(), ^V;r
new BubbleSort(), %!Eh9C*
new SelectionSort(), d)uuA;n
new ShellSort(), ZVH 9je
new QuickSort(), )x\%*ewY
new ImprovedQuickSort(), >4wigc
new MergeSort(), iWjNK"W
new ImprovedMergeSort(), 'Iw`+=iVz
new HeapSort() p]S'pzh
}; Y<W9LF
iSf%N>y'K
public static String toString(int algorithm){ \m)s"Sh.
return name[algorithm-1]; k0j4P^d
} Fu{VO~w
geK;r0(f
public static void sort(int[] data, int algorithm) { !%R):^R8
impl[algorithm-1].sort(data); Ld_uMe?Z
} LI}e_=E
)2y [#Blo
public static interface Sort { !U@ETo
public void sort(int[] data); XHJdynt/
} gKTCfD~
e}2?)B`[
public static void swap(int[] data, int i, int j) { A7YCSjB
int temp = data; {91Y;p C
data = data[j]; <#BK(W~$
data[j] = temp; y]{b4e
} ?yAb=zI1b
} e:-pqZT`