[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; *W l{2&
} Pa*yo:U'h
int i1=l; fi)ypv*
int i2=mid+1; $Z4p$o dk
for(int cur=l;cur<=r;cur++){ &}ow-u9c3
if(i1==mid+1) /uWON4
data[cur]=temp[i2++]; YL+W4ld
else if(i2>r) GupKM%kM
data[cur]=temp[i1++]; MvCBgLN
else if(temp[i1] data[cur]=temp[i1++]; <|@9]>z
else _rv_-n]"o
data[cur]=temp[i2++]; ,&$Y2+
} ?5D7n"jY
} e0P1FD<@
6{6tg>|L)
} %F7k| Na
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改进后的归并排序: FpEdwzBb<
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package org.rut.util.algorithm.support; +q;^8d>
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import org.rut.util.algorithm.SortUtil; ME.LS2'n
}z[se)s
/** Ic*Q(X
* @author treeroot sq%f%?(V
* @since 2006-2-2 0IZV4{
* @version 1.0 sgX~4W"J
*/ K(?7E6\vO
public class ImprovedMergeSort implements SortUtil.Sort { 20qT1!ju
#{(rOb6H)
private static final int THRESHOLD = 10; 711z-
Kt-@a%O0
/* qr*/}F6
* (non-Javadoc) '#fj)
* :MpCj<<[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 31}6dg8?n
*/ _Cxs"to
public void sort(int[] data) { )`)cB)s
int[] temp=new int[data.length]; 86i =N_
mergeSort(data,temp,0,data.length-1); vc<8ApK3V
} t9kgACo/M
E4{8 $:q=
private void mergeSort(int[] data, int[] temp, int l, int r) { \,WPFV
int i, j, k; cG<?AR?wDT
int mid = (l + r) / 2; GZ1>]HB>r^
if (l == r) ci!c7 ,'c
return; IpWl;i`__
if ((mid - l) >= THRESHOLD) o]vdxkU]
mergeSort(data, temp, l, mid); |G1U$p
else jH8F^KJM[
insertSort(data, l, mid - l + 1); QxK%ZaFZA
if ((r - mid) > THRESHOLD) ReY K5J=O
mergeSort(data, temp, mid + 1, r); +$%o#~
else 8ViDh
insertSort(data, mid + 1, r - mid); "}n]0 >J
J-U}iU|
for (i = l; i <= mid; i++) { V\ |b#?KL
temp = data; 09Fr1PL
} 7-^d4P+|g
for (j = 1; j <= r - mid; j++) { |Bjb
temp[r - j + 1] = data[j + mid]; gG}<l ':
} 0@ -LV:jU
int a = temp[l]; ` p)#!
int b = temp[r]; k,?k37%T]
for (i = l, j = r, k = l; k <= r; k++) { _jtBU
if (a < b) { milU,!7J
data[k] = temp[i++]; OlP#|x*
a = temp; }} IvZG&
} else { Nz m 7E]
data[k] = temp[j--]; mGIS[_dcs
b = temp[j]; G B15
} xd*kNY
} ]8RcZn
} {h2D}F
1&dWt_\
/** m^wYRA.
* @param data qwN-VCj
* @param l VL\6U05Z
* @param i |2mEowAd
*/ BM3nZ<%3
private void insertSort(int[] data, int start, int len) { !Ed';yfz\(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k]v a
} [j5L}e!T
} Uu G;z5
} N(D_*% 96
} J<'4(}^|
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堆排序： WKN\*N<
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package org.rut.util.algorithm.support; 4YKb~1qkk
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import org.rut.util.algorithm.SortUtil; GSypdEBj+w
$Q62 7
/** Mq$e5&/
* @author treeroot BsxQW`>^y
* @since 2006-2-2 nH;^$b'LZ
* @version 1.0 `S%pD.g,2
*/ hse$M\5
public class HeapSort implements SortUtil.Sort{ E}~GXG
*/6PkNq
/* (non-Javadoc) vrH/Z.WD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <CeDIX t
*/ aaLT%
public void sort(int[] data) { IXg0g<JZ
MaxHeap h=new MaxHeap(); @@+\
h.init(data); pZXva9bE
for(int i=0;i h.remove(); qPWYY
System.arraycopy(h.queue,1,data,0,data.length); #\fApRL
} iMF:~H-Yq#
|Kb-oM&^#
private static class MaxHeap{ H1+G:TM
sq*sbdE
void init(int[] data){ kFeuKSa^d
this.queue=new int[data.length+1]; NKO5c?ds
for(int i=0;i queue[++size]=data; k5|h8%h8
fixUp(size); ] OR]
} A07FjT5w8
} XmLHZ,/
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private int size=0; f.Jz]WXw,
]@Q14
private int[] queue; 8$S$*[-a
w_6h $"^x
public int get() { TTS}, `
return queue[1]; ?k#-)inf)
} =xg pr*
D/rKqPp|!
public void remove() { {um~]
SortUtil.swap(queue,1,size--); hmQD-E{Ab
fixDown(1); dKhDO`.s
} Y!}BmRLh2
file://fixdown {R\"x|
private void fixDown(int k) { aabnlOVw
int j; c/b}39X
while ((j = k << 1) <= size) { BJ1txdxvS
if (j < size %26amp;%26amp; queue[j] j++; ^,@Rd\q
if (queue[k]>queue[j]) file://不用交换 AS~O*(po
break; H+t^eg88
SortUtil.swap(queue,j,k); 4?;1cXXA
k = j; BoXQBcG]w
} ur"ckuG!9
} d.sxB}_O
private void fixUp(int k) { njX!Ez
while (k > 1) { 6*Rz}RQ
int j = k >> 1; Jva&"}Cb
if (queue[j]>queue[k]) [Cvo^cC
break; 3}2'PC
SortUtil.swap(queue,j,k); .(`#q@73
k = j; [T.kwQf4$
} D>PB|rS@
} Jk 0;<2j
^I@43Jy/
} [{L4~(uU8
%3|0_
} !Hxx6/
P'R!" #
SortUtil： }hhDJ_I5M
:voQ#f=
package org.rut.util.algorithm; :k#Y|(
}qRYXjS
import org.rut.util.algorithm.support.BubbleSort; uveTx
import org.rut.util.algorithm.support.HeapSort; YOy/'Le^:
import org.rut.util.algorithm.support.ImprovedMergeSort; vaW,O/F
import org.rut.util.algorithm.support.ImprovedQuickSort; N.l+9L0b
import org.rut.util.algorithm.support.InsertSort; 7&qunK'
import org.rut.util.algorithm.support.MergeSort; KYZ/b8C
import org.rut.util.algorithm.support.QuickSort; ]W]o6uo7
import org.rut.util.algorithm.support.SelectionSort; m6bAvy]3<t
import org.rut.util.algorithm.support.ShellSort; =;4cDmZh
\IQf|
/** %[l5){:05
* @author treeroot b[%sKl
* @since 2006-2-2 +' QX`
* @version 1.0 ez@`&cJ7
*/ ML9ZS @
public class SortUtil { $~75/
public final static int INSERT = 1; ia?{]!7$
public final static int BUBBLE = 2; 4 bw8^
public final static int SELECTION = 3; WnyEdYA
public final static int SHELL = 4; [2"a~o\
public final static int QUICK = 5; 7o-umZ}8
public final static int IMPROVED_QUICK = 6; pHXslmrD
public final static int MERGE = 7; BRLrD/8Le
public final static int IMPROVED_MERGE = 8; cQ} ,q+GR~
public final static int HEAP = 9; kl,I.2-
`qbf_;\
public static void sort(int[] data) { S-NKT(H)c
sort(data, IMPROVED_QUICK); s3Pr$h
} ?Id3#+-O
private static String[] name={ Gb4k5jl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @G@,)`p4?
}; )v !GiZ"7
J^m#984
private static Sort[] impl=new Sort[]{ i 3?=up!
new InsertSort(), N =FX3Z
new BubbleSort(), <b.?G
new SelectionSort(), JK))Cuh
new ShellSort(), ;'~U5Po8
new QuickSort(), >4b:`L
new ImprovedQuickSort(), 1qp<Fz[
new MergeSort(), d"`/P?nx
new ImprovedMergeSort(), ?Z9C}t]
new HeapSort() _bRd2k,
}; DO` K_B
^K. d|z
public static String toString(int algorithm){ XHKiz2Pc1
return name[algorithm-1]; j")#"& m
} I]+xerVd
Wn6~x2LaV
public static void sort(int[] data, int algorithm) { aDceOhfx
impl[algorithm-1].sort(data); 6O"?wN%$
} |Ii[WfFA|J
Aru=f~!
public static interface Sort { FOV%\=Hl
public void sort(int[] data); C-O~Oil
} <#/r.}.x
(&t741DN|
public static void swap(int[] data, int i, int j) { #;~`+[y?\
int temp = data; "*UN\VV+s
data = data[j]; LS;j]!CU
data[j] = temp; RdaAS{>Sk
} Jmg<mjq/G
} Gmi ^2?Z(