[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; .&Q'aOg
} X-mhz3Q&a
int i1=l; O! t> @%)
int i2=mid+1; i#RT4}l"a
for(int cur=l;cur<=r;cur++){ en1NFP
if(i1==mid+1) jQ 'r};;
data[cur]=temp[i2++]; E7c!KJ2
else if(i2>r) 5|pPzEA>
data[cur]=temp[i1++]; U>@st="
else if(temp[i1] data[cur]=temp[i1++]; HK/T`p#
else <"SOH;w
data[cur]=temp[i2++]; 55<f
} $Qc`4x;N
} r^2>60q'
"F.0(<4)
} 1(;_1@P
":G\
改进后的归并排序: $vQ#ah/k
<)J83D0$E
package org.rut.util.algorithm.support; Js706
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import org.rut.util.algorithm.SortUtil; lCznH?[
z;F6:aBa
/** foi@z9
* @author treeroot W ^MF3
* @since 2006-2-2 {~lVe GBp
* @version 1.0 6y4&nTq[
*/ s>VpbJ3S
public class ImprovedMergeSort implements SortUtil.Sort { ( \ \BsK
4J"S?HsW|
private static final int THRESHOLD = 10; 2L!wbeTb;
F"?OLV1B&
/* GW[g!66^
* (non-Javadoc) rda/
* tt=JvI9>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *nj={Ss&
*/ x'c%w:
public void sort(int[] data) { 63EwV p/|
int[] temp=new int[data.length]; )nI}KQJ<
mergeSort(data,temp,0,data.length-1); l[G&=/R@H
} Rx}*I00
lO=Nw+'$S
private void mergeSort(int[] data, int[] temp, int l, int r) { &:3uK`
int i, j, k; A5A4*.C
int mid = (l + r) / 2; oXQzCjX_
if (l == r) 4=T.rVS[
return; k/hD2tBLu
if ((mid - l) >= THRESHOLD) GO|1O|?
mergeSort(data, temp, l, mid); zFn!>Tqe
else qVvQ9?
insertSort(data, l, mid - l + 1); 8H%-/2NW
if ((r - mid) > THRESHOLD) fH#*r|~
mergeSort(data, temp, mid + 1, r); Hw(_l,Xf
else gHB*u!w7Z
insertSort(data, mid + 1, r - mid); s\CZ os&
`~0^fSww
for (i = l; i <= mid; i++) { +kMVl_`V
temp = data; >l!#_a
} tz).]E D
for (j = 1; j <= r - mid; j++) { 0pC}+ +
temp[r - j + 1] = data[j + mid]; 9ozK}Cg4
} 5f` a7R
int a = temp[l]; _~{Nco7T
int b = temp[r]; T&ECGF;Y/
for (i = l, j = r, k = l; k <= r; k++) { YEbB3N
if (a < b) { I"4Lma
data[k] = temp[i++]; d,c8ks(
a = temp; Xq"_^
} else { |3a1hCxt
data[k] = temp[j--]; ?bq S{KF
b = temp[j]; 4dB6cg
} B*zR/?U^
} g}vOp3^
} s%{8$>8V.
1&Fty'p
/** D.i(Irqw!
* @param data _0v+g1x
* @param l P?zPb'UVqa
* @param i &V$qIvN$
*/ tm"9`
private void insertSort(int[] data, int start, int len) { cEP!DUo
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "M GX(SQ
} RSK~<Y@]q{
} 5Oa`1?C1
} zm&D#)
} ~)ZMGx
THQd`Lj
堆排序： <;O-N=
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package org.rut.util.algorithm.support; *Y4[YnkPE
/|kR= ~
import org.rut.util.algorithm.SortUtil; F7FUoew<
O!,WH?r
/** @scy v@5)F
* @author treeroot Eeumi#$Z
* @since 2006-2-2 k^JV37;bl
* @version 1.0 ke+3J\;>
*/ @1`!}.Tk
public class HeapSort implements SortUtil.Sort{ _RTJEG
WDM^rjA|j
/* (non-Javadoc) xg|\\i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y@T0 jI
*/ rx$B(z(c
public void sort(int[] data) { N=JZtf/i
MaxHeap h=new MaxHeap(); /K@_O\+;Q
h.init(data); c}QWa"\2n
for(int i=0;i h.remove(); L.E6~Rv
System.arraycopy(h.queue,1,data,0,data.length); d*Wg>8|
} pX\Y:hCug
65P*Gu?
private static class MaxHeap{ Pl>BTo>p'
hk +@ngh%
void init(int[] data){ LNA5!E
this.queue=new int[data.length+1]; ^|P/D
for(int i=0;i queue[++size]=data; ']x`d
fixUp(size); ' )0eB:
} bm</qF'T6
} 8Hdm(>
\\Z{[{OZ
private int size=0; ib-)T7V`
^#V7\;v$G
private int[] queue; Fm|h3.`V
[myIcLp^aP
public int get() { Xf"B\%,(`
return queue[1]; oZ/z{`
} vi4lmkyh^
mPmg6Qj(W
public void remove() { IwTAM9n
SortUtil.swap(queue,1,size--); ^z _m<&r
fixDown(1); 0+iaO"%
} fH>I/%
file://fixdown < s>y{e
private void fixDown(int k) { =!~6RwwwY
int j; FxkxV GZ"
while ((j = k << 1) <= size) { >l$qE
if (j < size %26amp;%26amp; queue[j] j++; mF6 U{=
if (queue[k]>queue[j]) file://不用交换 g]ct6-m
break; Wf}x"*
SortUtil.swap(queue,j,k); >$g+Gx\v4
k = j; i'\7P-a
} d,"6s=4(q
} H[u[3
private void fixUp(int k) { v5/2-<6x
while (k > 1) { l>J>?b=x"[
int j = k >> 1; K,$Ro@!
if (queue[j]>queue[k]) 1B5]1&M
break; m,qMRcDF
SortUtil.swap(queue,j,k); 0o>l+c
k = j; qGYru1
} n6 VX0R
} v=Y) A?
U7(t >/
} fPj*qi
Ibbpy++d[
} n;w&}g
+YNN$i
SortUtil： Vi5&%/Y
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package org.rut.util.algorithm; y?}R,5k
,Qw\w,
import org.rut.util.algorithm.support.BubbleSort; w%NT 0J
import org.rut.util.algorithm.support.HeapSort; H*H=a
import org.rut.util.algorithm.support.ImprovedMergeSort; 'y? HF@NJ
import org.rut.util.algorithm.support.ImprovedQuickSort; -IP3I
import org.rut.util.algorithm.support.InsertSort; 8YLS/dN0 w
import org.rut.util.algorithm.support.MergeSort; %ylpn7I\6
import org.rut.util.algorithm.support.QuickSort; .>;}GsN&
import org.rut.util.algorithm.support.SelectionSort; 8A,="YIt
import org.rut.util.algorithm.support.ShellSort; ;V:Cf/@@R
N =0R6{'
/** 9si,z
* @author treeroot "{X_[
* @since 2006-2-2 uA1DTr?z
* @version 1.0 {-'S#04
*/ D,<#pNO_
public class SortUtil { uTq)Ets3
public final static int INSERT = 1; noLb
public final static int BUBBLE = 2; <zdo%~ba
public final static int SELECTION = 3; e|~s'{3
public final static int SHELL = 4; >8>}o4Q/X
public final static int QUICK = 5; P-*=e8z{
public final static int IMPROVED_QUICK = 6; j1hx{P'
public final static int MERGE = 7; S$egsK"~
public final static int IMPROVED_MERGE = 8; (!iGQj(m
public final static int HEAP = 9; ?->&)oAh
F,l%SQCyj
public static void sort(int[] data) { c~=yD:$
sort(data, IMPROVED_QUICK); @U;U0
} Wt8=j1>
private static String[] name={ 4-dV%DgC
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (q|EC;
}; Ov5*&*P
?t{ 2y1
private static Sort[] impl=new Sort[]{ )b_ GKA `
new InsertSort(), h+!
new BubbleSort(), mEM/}]2
new SelectionSort(), *G,'V,?
new ShellSort(), ]*Tnu98G}
new QuickSort(), ,aLdW,<6
new ImprovedQuickSort(), C6neZng
new MergeSort(), F~Z~OqCS
new ImprovedMergeSort(), eK]$8l|LI
new HeapSort() K#LG7faj
}; ,cqZb0VP{t
nYv`{0S+m
public static String toString(int algorithm){ ~_YU%y
return name[algorithm-1]; D]h~\
} t'F_1P^*/
4XprVB
public static void sort(int[] data, int algorithm) { "++q.y
impl[algorithm-1].sort(data); .vbUv3NI
} NIQX?|;b{
D#~S<>u@
public static interface Sort { ^z^ UFW
public void sort(int[] data); r,`59
} u,rieKYF
NSPa3NE
public static void swap(int[] data, int i, int j) { %](H?'H
int temp = data; 96&Y
data = data[j]; eZr}xo@9
data[j] = temp; mOUIGlv
} O+o4E?}
} @YMQbjbr