[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; rxol7"2l
} ??B!UXi4R
int i1=l; XW8@c2jN\7
int i2=mid+1; eLh35tw
for(int cur=l;cur<=r;cur++){ kR^">s/H#
if(i1==mid+1) MIkp4A
data[cur]=temp[i2++]; .eVX/6,
else if(i2>r) L.;x=w
data[cur]=temp[i1++]; ?&,6Y'"
else if(temp[i1] data[cur]=temp[i1++]; 6W3oIt
else "v wLj:
data[cur]=temp[i2++]; $ eL-fg
} 1TA!9cz0Z
} G8w@C
mYJ8O$
} uMGy-c
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改进后的归并排序: 2P`./1L
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package org.rut.util.algorithm.support; Rvf{u8W
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import org.rut.util.algorithm.SortUtil; MD1X1,fk
K\B!tk
/** :O@n6%pSL
* @author treeroot (JdheCq!x
* @since 2006-2-2 y_W?7S
* @version 1.0 @VOegf+N
*/ ^J^~5q8
public class ImprovedMergeSort implements SortUtil.Sort { WwnBe"7M
*]<=04v]R
private static final int THRESHOLD = 10; BHgs,
N#-.[9!
/* =bJ$>Djp
* (non-Javadoc) }D)eS |B
* 3I}AA.h'00
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $,r%@'=&
*/ 0)h.[O8@>
public void sort(int[] data) { ZW"f*vwQo
int[] temp=new int[data.length]; : Gi8Jo
mergeSort(data,temp,0,data.length-1); ":/Vp,g
} `g(#~0R
s8]%L4lvu
private void mergeSort(int[] data, int[] temp, int l, int r) { H@zv-{}T8
int i, j, k; (ESFR0
int mid = (l + r) / 2; Fq+Cr?-
if (l == r) xA:;wV
return; |p+FIr+
if ((mid - l) >= THRESHOLD) qR2cRepV
mergeSort(data, temp, l, mid); (dNF)(wn
else 1z2v[S&pk
insertSort(data, l, mid - l + 1); IN1n^f$:
if ((r - mid) > THRESHOLD) #2Q%sE?
mergeSort(data, temp, mid + 1, r); %j17QD8
else #<&@-D8
insertSort(data, mid + 1, r - mid); xZ2 1iQeN
$?:IRgAr
for (i = l; i <= mid; i++) { .@mZG<vg
temp = data; LR#.xFQ+
} =M@)qy
for (j = 1; j <= r - mid; j++) { \J?&XaO=
temp[r - j + 1] = data[j + mid]; ^hEN
} V?^qW#AG
int a = temp[l]; \&V[<]
int b = temp[r]; SV ~QH&0'
for (i = l, j = r, k = l; k <= r; k++) { 5M)B
if (a < b) { {*CG&-k2D
data[k] = temp[i++]; BBX/&d8n
a = temp; MMaS
} else { q |Pebe=
data[k] = temp[j--]; d@JavcR
b = temp[j]; gV':Xe
} zN+jn
} k"BM1-f
} 5)k/4l '
L!/{Z
/** 9,Dw;|A]
* @param data 0VR,I{<.{
* @param l *CF80DJ
* @param i ;VCFDE{K=
*/ g0/R\
private void insertSort(int[] data, int start, int len) { x3Fn'+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GP^^ K
} loq2+(
} &2@Rc?!6_P
} wp~KrUlR
} [!KsAsmk
u5U^}<}y}
堆排序： )Rk(gd
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package org.rut.util.algorithm.support; @{<^rLt
TK>~)hc}
import org.rut.util.algorithm.SortUtil; 4T)`%Oo<}
8h}1t4k
/** $'*{&/@
* @author treeroot _Eq,udCso
* @since 2006-2-2 98zJ?NaD&
* @version 1.0 UNrO$aX!1'
*/ ph2 _P[S'
public class HeapSort implements SortUtil.Sort{ Vn/FW?d7
4uE/!dT
/* (non-Javadoc) 5?j#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y3)*MqZlF
*/ Lq@uwiq!
public void sort(int[] data) { Dg ~k"Ice
MaxHeap h=new MaxHeap(); 65+2+p
h.init(data); "x_G6JE4tv
for(int i=0;i h.remove(); _a?x)3\v
System.arraycopy(h.queue,1,data,0,data.length); l0',B*og
} \Y:zg3q*
] TZ/=Id
private static class MaxHeap{ (h@~0S
*a(GG
void init(int[] data){ ?LvxEQ-g
this.queue=new int[data.length+1]; TPN1Rnt0`
for(int i=0;i queue[++size]=data; PP_ar{|7
fixUp(size); ~me/ve
} r0'a-Mk;
} yzNDXA.
yWH!v]S
private int size=0; +rrA>~
{FN4BC`3+
private int[] queue; [NGq$5
4*q6#=G
public int get() { VjiwW%UOM
return queue[1]; d.U"lP/)D
} iNL>TVUM
? EhIK
public void remove() { ="g9>
SortUtil.swap(queue,1,size--); KC<K*UHPAH
fixDown(1); 1yc$b+TH
} [A;0IjKam
file://fixdown U:aaa
private void fixDown(int k) { [|YuT:Cp
int j; (I1^nrDP.
while ((j = k << 1) <= size) { H,!yG5yF
if (j < size %26amp;%26amp; queue[j] j++; K1-3!G
if (queue[k]>queue[j]) file://不用交换 '?mky,:HT
break; @_#]7
SortUtil.swap(queue,j,k); qs (L2'7/
k = j; Nfl5tI$U:
} Ivq|-LDNc
} =AuxMEg
private void fixUp(int k) { u$"Ew^C
while (k > 1) { @[ '?AsO
int j = k >> 1; .z,`{-7U
if (queue[j]>queue[k]) G$lE0_j2{
break; d8^S~7
SortUtil.swap(queue,j,k); fhki!# E8M
k = j; 91FVe
} QA~Lm
} wI[J>9Qn
2d OUY $4
} wFL7JwK:G
]#FQde4]5
} s*e1m%
( d8rfet
SortUtil： `P*PCiZos
NQd0$q
package org.rut.util.algorithm; \Dx)P[Ur
v@:m8Y(t
import org.rut.util.algorithm.support.BubbleSort; 5lE9UoG[Q
import org.rut.util.algorithm.support.HeapSort; @`SlOKz!=
import org.rut.util.algorithm.support.ImprovedMergeSort; 5%fR9?)
import org.rut.util.algorithm.support.ImprovedQuickSort; "(;t`,F
import org.rut.util.algorithm.support.InsertSort; ;Z&w"oSJ
import org.rut.util.algorithm.support.MergeSort; j|r$!gV
import org.rut.util.algorithm.support.QuickSort; '81WogH:
import org.rut.util.algorithm.support.SelectionSort; "!o|^nN,
import org.rut.util.algorithm.support.ShellSort; RWGAxq`9f
*nY$YwHB
/** S^SF!k=
* @author treeroot TzV~I\a|
* @since 2006-2-2 iB{l:
* @version 1.0 Q2t>E(S
*/ s#(<zBZ9p#
public class SortUtil { 69``j{Z+
public final static int INSERT = 1; Gwfi
public final static int BUBBLE = 2; 'R n\CMTH
public final static int SELECTION = 3; "A}2iI
public final static int SHELL = 4; pxQh;w
public final static int QUICK = 5; >6z7.d
public final static int IMPROVED_QUICK = 6; ]Mgxv>zRbs
public final static int MERGE = 7; `n%8y I%
public final static int IMPROVED_MERGE = 8; =#?=Lh
public final static int HEAP = 9; E@)9'?q
]7%+SH,RdD
public static void sort(int[] data) { TmgSV#G
sort(data, IMPROVED_QUICK); $w! v
} t&(\A,ch%
private static String[] name={ N6/;p]|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wgKM6?
}; $"{I|UFC
n'<F'1SWv
private static Sort[] impl=new Sort[]{ b5UIX Kim
new InsertSort(), g;</|Z
new BubbleSort(), pIvr*UzY
new SelectionSort(), #D8u#8Dz
new ShellSort(), 'n"n;
new QuickSort(), \.MPjD
new ImprovedQuickSort(), >m`<AynJ
new MergeSort(), od]1:8OF
new ImprovedMergeSort(), x^!LA,`j
new HeapSort() udX!R^8jE
}; O['5/:-
'X1/tB8*
public static String toString(int algorithm){ qyY]: (8
return name[algorithm-1]; Q|W~6
} RjG=RfB'V
/8s>JPXKH[
public static void sort(int[] data, int algorithm) { 7j{63d`2
impl[algorithm-1].sort(data); gib;> nuBK
} Q+^"v]V`d
h8?E+0
public static interface Sort { NGuRyZp69&
public void sort(int[] data); jH]?vpP
} JO|xX<#:
]*yUb-xY
public static void swap(int[] data, int i, int j) { j{H,{x
int temp = data; [7=?I.\Cr7
data = data[j]; rPoq~p[Y
data[j] = temp; "v5jYz5M
} Q~$hx{foN
} sKGR28e