[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; 2q4<t:!
} PO7Lf#9]
int i1=l; /mu*-,aeX
int i2=mid+1; "djw>|,N<
for(int cur=l;cur<=r;cur++){ tlp@?(u
if(i1==mid+1) 3az&<Pqb
data[cur]=temp[i2++]; be^6i:
else if(i2>r) 9lH?-~9
data[cur]=temp[i1++]; a1y-3z
else if(temp[i1] data[cur]=temp[i1++]; } c}_<#I
else w+E,INdi
data[cur]=temp[i2++]; pKrN:ExB"\
} 58J}{Req
} zb<6 Ov
q,eVjtF
} BV upDGh3
!*. -`$x
改进后的归并排序: O,h;hQZ
:|8M`18lZ
package org.rut.util.algorithm.support; {"QNJq#:
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import org.rut.util.algorithm.SortUtil; Gc;{\VU
6N S201o
/** O[)kboY
* @author treeroot 5m(^W[u `
* @since 2006-2-2 Q &K
* @version 1.0 rOOT8nkR#
*/ I4q9|'-yx
public class ImprovedMergeSort implements SortUtil.Sort { Y@ksQ_u
qd)/9*|Jl
private static final int THRESHOLD = 10; krvp&+uX
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/* |! E)GahM
* (non-Javadoc) :'l^kSP_*C
* thM4vq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D"?fn<2
*/ r^a7MHY1
public void sort(int[] data) { $LFYoovX
int[] temp=new int[data.length]; ssxzC4m
mergeSort(data,temp,0,data.length-1); y6,/:qm
} 9!}8UALD
:G2k5xD/E
private void mergeSort(int[] data, int[] temp, int l, int r) { 'd$P`Vw:
int i, j, k; PFne+T!2F
int mid = (l + r) / 2; 5BKt1%Pg
if (l == r) iJ3e1w$
return; s<eb;Z2D
if ((mid - l) >= THRESHOLD) 91g2A|
mergeSort(data, temp, l, mid); 8Sh54H
else UsQ+`\|
insertSort(data, l, mid - l + 1); ;J2zp*|
if ((r - mid) > THRESHOLD) 5}]"OXQ
mergeSort(data, temp, mid + 1, r); E:}r5S)4
else k$J zH$
insertSort(data, mid + 1, r - mid); [knN:{ l
r^paD2&}
for (i = l; i <= mid; i++) { \2"I;
temp = data; JYd 'Jp8bP
} >kp?vK;'B
for (j = 1; j <= r - mid; j++) { Y M\ K%rk
temp[r - j + 1] = data[j + mid]; zhRB,1iG
} 8a'.ZdqC?
int a = temp[l]; ( _)jkI \
int b = temp[r]; %<*g!y `
for (i = l, j = r, k = l; k <= r; k++) { HbAkZP
if (a < b) { ,TN 2
data[k] = temp[i++]; w6GyBo{2O_
a = temp; SO(NVJh
} else { [@b&? b~K
data[k] = temp[j--]; iIa'2+
b = temp[j]; ve/<=IR Zo
} IS 2^g>T#1
} <_tT<5'[$u
} D (mj7oB
F,dx2ZPIs?
/** 5^lxj~ F
* @param data V7P&%oz{C
* @param l au=o6WRa
* @param i C=It* j55
*/ Z99>5\k
private void insertSort(int[] data, int start, int len) { 4?7W+/~<&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ytoo~n
} ,Pjew%
} *q".-u!D[
} <|+Ex
} C/kW0V7
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堆排序： |J}Mgb-4
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package org.rut.util.algorithm.support; $[&*Bj11Yg
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import org.rut.util.algorithm.SortUtil; I@%t.%O Jp
>JCM.I0_|
/** \r,Q1n?7
* @author treeroot Rh{zH~oZ
* @since 2006-2-2 7-T{a<g
* @version 1.0 A1#%`^W9
*/ #+5pgD2C
public class HeapSort implements SortUtil.Sort{ aL%AQB,
;\Y&ce
/* (non-Javadoc) T}P".kpbS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !Kj,9NX{U
*/ @I/]D6 ~"
public void sort(int[] data) { "zRoU$X
MaxHeap h=new MaxHeap(); %. ,=maA
h.init(data); ); dT_
for(int i=0;i h.remove(); be-~\@
System.arraycopy(h.queue,1,data,0,data.length); jvFTR'R)=
} w1#gOwA,$
?zVL;gVWA
private static class MaxHeap{ f[~L?B;_L
;)e2@'Agl
void init(int[] data){ .!,z:l$Kh
this.queue=new int[data.length+1]; (egzH?
for(int i=0;i queue[++size]=data; D'A/wG
fixUp(size); !@'6)/
} oMTf"0EIW
} JJ'.((
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private int size=0; C #6dC0
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private int[] queue; [YT>*BH?
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public int get() { S9`flo
return queue[1]; uVDa^+=
} $8[r9L!
!PJ6%"
public void remove() { 78OIUNm`
SortUtil.swap(queue,1,size--); QC;^xG+W
fixDown(1); W.0L:3<"
} Ii_ojQP-z
file://fixdown 88h3|'*
private void fixDown(int k) { ),!;| bh
int j; F[[TWf/
while ((j = k << 1) <= size) { 5~WGZc
if (j < size %26amp;%26amp; queue[j] j++; #ap9Yoyk\
if (queue[k]>queue[j]) file://不用交换 WT`4s
break; ixQJ[fH10
SortUtil.swap(queue,j,k); XWs"jt
k = j; :2-pjkhiwY
} z`FCs,?K
} B0WJ/)rK<
private void fixUp(int k) { ez!C?
while (k > 1) { 8o0%@5M
int j = k >> 1; 09kt[
if (queue[j]>queue[k]) }HYjA4o\A
break; (BfgwC)
SortUtil.swap(queue,j,k); /2Bi@syxK
k = j; ?6jkI2w
} K/=_b<
} :`2=@.
X>. NFB
} *@)O7vB
R@#G>4
} z,bQQ;z9
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SortUtil： `zt_7MD
Vy,^)]
package org.rut.util.algorithm; ;~u{56
pBP.x#|
import org.rut.util.algorithm.support.BubbleSort; FEW_bP/4
import org.rut.util.algorithm.support.HeapSort; z2hc.29t
import org.rut.util.algorithm.support.ImprovedMergeSort; \$OF1i@
import org.rut.util.algorithm.support.ImprovedQuickSort; BQ2wnGc
import org.rut.util.algorithm.support.InsertSort; BC;:
import org.rut.util.algorithm.support.MergeSort; ,b;{emX h
import org.rut.util.algorithm.support.QuickSort; _#}n~}d
import org.rut.util.algorithm.support.SelectionSort; PF7&p~O(Z
import org.rut.util.algorithm.support.ShellSort; JA_BKA
4bJZmUb
/** 3^~KB'RZ
* @author treeroot V{&rQ@{W
* @since 2006-2-2 `TPOCxM Mo
* @version 1.0 \3jW~FV
*/ 9{8GP
public class SortUtil { $gM8{.!
public final static int INSERT = 1; <K4,7J$}h
public final static int BUBBLE = 2; `VL}.h
public final static int SELECTION = 3; #I3$3^0i#
public final static int SHELL = 4; S#Sb]
public final static int QUICK = 5; (nab
public final static int IMPROVED_QUICK = 6; 13&0rLS
public final static int MERGE = 7; .eO?Z^
public final static int IMPROVED_MERGE = 8; h"[+)q%L
public final static int HEAP = 9; dN}#2Bo=
Uyr3dN%*r
public static void sort(int[] data) { -}6xoF?
sort(data, IMPROVED_QUICK); OOz[-j>'Y+
} W$Yc'E ;
private static String[] name={ Pv+5K*"7Cg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ed_FiQd
}; zb Z4|_
'vaLUy9]
private static Sort[] impl=new Sort[]{ _:B1_rz7,
new InsertSort(), rzI|?QaPi
new BubbleSort(), 5rV((
new SelectionSort(), l?)ZJ3]a
new ShellSort(), H7kPM[
new QuickSort(), *8tI*Pus
new ImprovedQuickSort(), cFF*Z=L_
new MergeSort(), 79yd&5#e?
new ImprovedMergeSort(), 5+jf/}tA
new HeapSort() [ dE.[
}; @Ehn(}
a`u S[r>
public static String toString(int algorithm){ |fY/i] Ax
return name[algorithm-1]; KB!|B.ChN(
} ;eZ#bjw-d
$eBX
public static void sort(int[] data, int algorithm) { `O8b1-1q~
impl[algorithm-1].sort(data); !HJ$UG/\
} )I-fU4?
7 #=}:3c
public static interface Sort { A=-F,=k(!/
public void sort(int[] data); gxGrspqg
} kzS=g|_
^v@4|E$
public static void swap(int[] data, int i, int j) { PSmfiaThwo
int temp = data; 0G2g4DSKD
data = data[j]; ;|cTHGxbE
data[j] = temp; rBN)a"
} G^1b>K
} "uPy,<l