[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; M3d%$q)<rW
} 0E3;f;'X
int i1=l; '['x'G50
int i2=mid+1; I~ mu'T
for(int cur=l;cur<=r;cur++){ i}|jHlv
if(i1==mid+1) xA*6Z)Y
data[cur]=temp[i2++]; BoARM{m
else if(i2>r) 0}:Wh&g
data[cur]=temp[i1++]; *xx)j:Sc2
else if(temp[i1] data[cur]=temp[i1++]; 'w/S6j
else N /;Vg^Wx
data[cur]=temp[i2++]; ][8`}ki 1
} a=B $L6*4
} :yw(Co]f
Kb/qM}jS
} BryD?/}P)M
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改进后的归并排序: 1:|o7`
%w!x \UV
package org.rut.util.algorithm.support; :[C|3KKe"
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import org.rut.util.algorithm.SortUtil; /p}pdXS
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/** ]%G#x
* @author treeroot k$Ug;`v#
* @since 2006-2-2 {"N:2
* @version 1.0 \SJX;7ST
*/ y"_rDj`
public class ImprovedMergeSort implements SortUtil.Sort { G}]'}FUp
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private static final int THRESHOLD = 10; O/&Qzt
#~r+Z[(,p
/* 6>'>BamX
* (non-Javadoc) x_(K%0+Ca
* 4dI`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !<h-2YF<M
*/ ')WS :\J
public void sort(int[] data) { B+c,3@)x
int[] temp=new int[data.length]; |B2>}Y/
mergeSort(data,temp,0,data.length-1); BY$L[U;@T
} +Q:)zE
!H9zd\wc
private void mergeSort(int[] data, int[] temp, int l, int r) { [a#*%H{OC
int i, j, k; *M$$%G(4
int mid = (l + r) / 2; P (fWJVF7
if (l == r) AG Gxx?I
return; 8xoC9!xt
if ((mid - l) >= THRESHOLD) i`w&{WTRQ
mergeSort(data, temp, l, mid); L*{E-m/
else @[TSJi
insertSort(data, l, mid - l + 1); e"Tr0k
if ((r - mid) > THRESHOLD) hXc:y0 0
mergeSort(data, temp, mid + 1, r); 1<0Z@D~F
else b>& 3XDz
insertSort(data, mid + 1, r - mid); 0"mr*hyj
y@ c[S;
for (i = l; i <= mid; i++) { *M6j)jqV
temp = data; PD^Cj?wm
} w6AG:u
for (j = 1; j <= r - mid; j++) { Et&PzDvU
temp[r - j + 1] = data[j + mid]; Se!B,'C%
} T^2o'_:
int a = temp[l]; UrdSo"%
int b = temp[r]; J c:j7}OOV
for (i = l, j = r, k = l; k <= r; k++) { ?oU5H
if (a < b) { c:-n0m'i
data[k] = temp[i++]; O7f"8|=HX
a = temp; 8?hj}}H
} else { 75c\.=G9q<
data[k] = temp[j--]; @CA{uP;
b = temp[j]; <t,lq
} [tJp^?6*
} jq(rnbV
} 2bOFH6g
W"D>>]$|u
/** |_16IEJ
* @param data or[!C%
* @param l z+j3j2
* @param i Htce<H-P
*/ Rab7Y,AA
private void insertSort(int[] data, int start, int len) { |1m2h]];Q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =qww|B92
} ({hW
} @KU^B_{i
} -8sB\E
} _Hv@bIL'
T{*!.+E
堆排序： 8q|T`ac+N
dMa6hI{k
package org.rut.util.algorithm.support; 0G8zFe*p
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import org.rut.util.algorithm.SortUtil; F>aaUj
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/** "lKR~Qi
* @author treeroot +wm%`N;v<
* @since 2006-2-2 @5cY5e*i{
* @version 1.0 uL=FK
*/ W9jxw4)
public class HeapSort implements SortUtil.Sort{ %"AB\lL.
4l_~-Peh
/* (non-Javadoc) LbnW(wr6:(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p9~$}!ua
*/ 6f;20dn6
public void sort(int[] data) { 1-8G2e
MaxHeap h=new MaxHeap(); mfr7w+DK
h.init(data); --F6n/>
for(int i=0;i h.remove(); 4X$|jGQ\
System.arraycopy(h.queue,1,data,0,data.length); d{(NeTs
} (A~w IKY,
@gjA8mL
private static class MaxHeap{ mN1n/LNi
vm8ER,IW)
void init(int[] data){ |) CfO4
this.queue=new int[data.length+1]; B[;aNyd<
for(int i=0;i queue[++size]=data; ^NFL3v8
fixUp(size); Ypx"<CKP}
} Pr#uV3\
} >4nQ&b.u
8l >Xbz
private int size=0; U,Z7nH3_
Pk&sY'
private int[] queue; 1abQoe
`"y:/F"{
public int get() { Io&F0~Z;;(
return queue[1]; qzqv-{.h
} 6]^}GyM!
gI^*O@Q4{b
public void remove() { 9YpD\H`
SortUtil.swap(queue,1,size--); 3l 0>
fixDown(1); j{9sn,<:
} Y m|zM1qc
file://fixdown /%U+kW
private void fixDown(int k) { K/jC>4/c/
int j; 8:,l+[\
while ((j = k << 1) <= size) { :- ydsR/
if (j < size %26amp;%26amp; queue[j] j++; ;p#)z/zZ
if (queue[k]>queue[j]) file://不用交换 ?8n`4yO0
break; b{t'Doe
SortUtil.swap(queue,j,k); >T4.mB7+>
k = j; s7<x~v+^
} RI"A'/56
} 0p_/eWww-
private void fixUp(int k) { kQ~*iY
while (k > 1) { n8[ sl]L
int j = k >> 1; { CkxUec
if (queue[j]>queue[k]) 4*_9Gl
break; =LS?:Mhm
SortUtil.swap(queue,j,k); ajW[}/)
k = j; A\_cGM2
} _rK}~y=0
} s3W)hU)
&<-Sxjj
} 1_!*R]aq
!h{qO&ZH=
} 1j<=TWit
~&=-*
SortUtil： /z*?:*
b}p0&%I
package org.rut.util.algorithm; _pM&Ya
*BT-@V.4
import org.rut.util.algorithm.support.BubbleSort; GmB7@-[QA%
import org.rut.util.algorithm.support.HeapSort; qIa|sV\w0
import org.rut.util.algorithm.support.ImprovedMergeSort; UjwA06
import org.rut.util.algorithm.support.ImprovedQuickSort; :Q=Jn?Gjb
import org.rut.util.algorithm.support.InsertSort; it!8+hvq9*
import org.rut.util.algorithm.support.MergeSort; [ottUS@
import org.rut.util.algorithm.support.QuickSort; 7E4=\vM
import org.rut.util.algorithm.support.SelectionSort; 1K&z64Q5J
import org.rut.util.algorithm.support.ShellSort; HjV3PFg
1"009/|
/** ad8kUHf
* @author treeroot )R+@vh#Q<$
* @since 2006-2-2 Z+@"
* @version 1.0 f7}/ {}g
*/ ZJ@M}-4O1
public class SortUtil { .0S.7w3dZo
public final static int INSERT = 1; EX7cjQsml
public final static int BUBBLE = 2; 0n|op:]BHM
public final static int SELECTION = 3; ~S15tZ $
public final static int SHELL = 4; %p)6m2Sb
public final static int QUICK = 5; i2A>T/?{
public final static int IMPROVED_QUICK = 6; gX5I`mm
public final static int MERGE = 7; kN>%y&cK
public final static int IMPROVED_MERGE = 8; z@^[.
public final static int HEAP = 9; 0:R}
{BKu'A
public static void sort(int[] data) { {3]g3mj
sort(data, IMPROVED_QUICK); Ey=(B'A~
} \1hbCv$Hf
private static String[] name={ snOd 3Bw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hS}?"ST|
}; NduvfA4
2@@OjeANsX
private static Sort[] impl=new Sort[]{ 4<)%Esyb
new InsertSort(), 3:X3n\z
new BubbleSort(), c_<m8b{AEF
new SelectionSort(), @T
new ShellSort(), fDhV *LqW
new QuickSort(), fGHYs
new ImprovedQuickSort(), '{p/F $
new MergeSort(), *P_(hG&c
new ImprovedMergeSort(), j|TcmZGO
new HeapSort() "qjkwf)\
}; 3r!6Z5P7{'
<61T)7
public static String toString(int algorithm){ Nl,M9
return name[algorithm-1]; S:4'k^E
} 7T9m@
m.e+S,i
public static void sort(int[] data, int algorithm) { VliX'.-
impl[algorithm-1].sort(data); z %{Z
} 5drc8_fZ
ma[%,u`
public static interface Sort { AM cHR=/
public void sort(int[] data); ~A2{$C
} r:lv[/D
GOuBNaU{
public static void swap(int[] data, int i, int j) { 8+K=3=05#U
int temp = data; :so2 {.t-
data = data[j]; $mOVo'2
data[j] = temp; ]Ir{9EE v
} nf=*KS\v
} /8(c^