[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; :^l`m9
} z2-=fIr.h
int i1=l; M5D,YC3<
int i2=mid+1; 2f4*r^
for(int cur=l;cur<=r;cur++){ Q}G
if(i1==mid+1) J)*y1
data[cur]=temp[i2++]; "ibKi=
else if(i2>r) @T1-0!TM')
data[cur]=temp[i1++]; +&JF|#FQ`
else if(temp[i1] data[cur]=temp[i1++]; X^"95Ic
else (R.k.,z
data[cur]=temp[i2++]; $.v5G>-)3
} GAQVeL1
} mz>"4-]
T?Gi;ld7
} 16xM?P
qxk1Rzm?x
改进后的归并排序: 6=FF*"-6E
@aI`ru+a
package org.rut.util.algorithm.support; AM\`v'I*6
o:m:9dn
import org.rut.util.algorithm.SortUtil; M7UVL&_z%
_bFX(~37z?
/** Zb3E-'G+
* @author treeroot :*Sl\:_X)
* @since 2006-2-2 RKRk,jRL
* @version 1.0 vcqL
*/ jR*1%.Ng
public class ImprovedMergeSort implements SortUtil.Sort { 9CW .xX8
v"\Q/5p
private static final int THRESHOLD = 10; gy,B+~p
F~z4T/TN%G
/* %5$yz|:
* (non-Javadoc) BIS5u4
* cl)%qIXj}H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n`;=^^B
*/ HtPasFrJ
public void sort(int[] data) { LBbk]I
int[] temp=new int[data.length]; J!~?}Fq/z
mergeSort(data,temp,0,data.length-1); sYgpK92
} ?tg(X[h{S
<LH(>
private void mergeSort(int[] data, int[] temp, int l, int r) { g/J ^YT!
int i, j, k; ^0c:ro
int mid = (l + r) / 2; l '<gkwX
if (l == r) mi6<;N2w|
return; u6$fF=
if ((mid - l) >= THRESHOLD) Gd%KBb
mergeSort(data, temp, l, mid); q>?uB4>^
else fMP$o3;
insertSort(data, l, mid - l + 1); >a5CW~Z]
if ((r - mid) > THRESHOLD) c"H*9u:
mergeSort(data, temp, mid + 1, r); H<Ed"-n$I<
else grp1nWAs
insertSort(data, mid + 1, r - mid); "~> # ;x{
uR"(0_
for (i = l; i <= mid; i++) { [2WJ>2r}6
temp = data; 3mIVNT@S9
} E}00y%@*J
for (j = 1; j <= r - mid; j++) { %D:Mt|
temp[r - j + 1] = data[j + mid]; ZEiW\ V
} 8fY1~\G:\
int a = temp[l]; !/[/w39D0o
int b = temp[r]; pA&CBXio
for (i = l, j = r, k = l; k <= r; k++) { ^/h,C^/;
if (a < b) { CuR.a
data[k] = temp[i++]; MR}GxI
a = temp; * _)xlpy
} else { %ZDo;l+<F6
data[k] = temp[j--]; cNZuwS~,
b = temp[j]; 0B7cpw>_J
} o4^rE<vJ
} 7Y"CeU-S
} sG!SSRL@
N<}{oIsZ+
/** s,!+wHv_8
* @param data 5|._K(M
* @param l S:"R/EE(
* @param i Lnc _)RF
*/ zUF%`CR
private void insertSort(int[] data, int start, int len) { Yw&{.<sL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |j3mI\ANF
} 6`Zx\bPDm
} $d? N("L
} ?fr -5&,
} i"V2=jTeBv
J$JXY@mBSC
堆排序： ~"6/OJA
0.7*2s-
package org.rut.util.algorithm.support; "^_9t'0
|E/U(VS3l~
import org.rut.util.algorithm.SortUtil; _1TSt%L
A2.[P==
/** 4Qh\3UL~
* @author treeroot ig(dGKD\=9
* @since 2006-2-2 DlIy'@ .
* @version 1.0 6P@3UQ)}s
*/ VbQ9o
public class HeapSort implements SortUtil.Sort{ jLRUWg
)xwWig.
/* (non-Javadoc) DY<Br;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =23JE'^=
*/ #Q320}]{
public void sort(int[] data) { gwHNz5 a*V
MaxHeap h=new MaxHeap(); 94Wf ]
h.init(data); 2@ 4^ 81
for(int i=0;i h.remove(); ?fF{M%i-%
System.arraycopy(h.queue,1,data,0,data.length); rBG8.E36J
} $$QbcnOf$
XoI,m8A
private static class MaxHeap{ Eo)w f=rE9
pI*/-!I
void init(int[] data){ BfQRw>dZ"{
this.queue=new int[data.length+1]; ;`ZGiax
for(int i=0;i queue[++size]=data; 'fB/6[bd
fixUp(size); RDX".'`(=
} >:7W.QLRU
} s+m,ASj
0{u31#0j
private int size=0; Okd?=*sBx
M`{x*qR
private int[] queue; 1~X~"M
B1\@ n$
public int get() { w s(9@
return queue[1]; O}VI8OB(&
} ]u~6fknm
QvB]?D#h
public void remove() { +Fu=9j/,j
SortUtil.swap(queue,1,size--); }M%U}k]+@
fixDown(1); <3]Qrjl ,b
} Gp6|0:2,L~
file://fixdown P8#;a
private void fixDown(int k) { ("HT0&#a
int j; OW$? 6
while ((j = k << 1) <= size) { ^"Y5V5
if (j < size %26amp;%26amp; queue[j] j++; cZnB 2T?
if (queue[k]>queue[j]) file://不用交换 tg%U2+.q
break; E2f9J{Ki=
SortUtil.swap(queue,j,k); ba_T:;';0
k = j; +jk_tPSe
} +/idq
} >{_`J
private void fixUp(int k) { MguH)r`uT
while (k > 1) { Q<]~>cd^
int j = k >> 1; T?=[6
if (queue[j]>queue[k]) K<`"Sr
break; \qPgQsy4
SortUtil.swap(queue,j,k); -#XNZy!//
k = j; 7.O1 ~-
} 7X|M\WUq
} z`b.~<P
E3N4(V\*
} ii%n:0+zm
R!7emc0T
} $~,]F
eZ~^Z8F[6
SortUtil： /uSEG<D
VK9I#
package org.rut.util.algorithm; oh{!u!L`]
m4:b?[
import org.rut.util.algorithm.support.BubbleSort; !"E&Tk}
import org.rut.util.algorithm.support.HeapSort; c9e }P
import org.rut.util.algorithm.support.ImprovedMergeSort; 7. y L>
import org.rut.util.algorithm.support.ImprovedQuickSort; % ~%>3
import org.rut.util.algorithm.support.InsertSort; 3mWd?!+m=
import org.rut.util.algorithm.support.MergeSort; b2;Weu3WN
import org.rut.util.algorithm.support.QuickSort; yc,Qz.+g
import org.rut.util.algorithm.support.SelectionSort; >mI-h
import org.rut.util.algorithm.support.ShellSort; MS Ui_|7
Py(l+Ik`>
/** ?9q{b\=l
* @author treeroot IXp P.d
* @since 2006-2-2 |N[SCk>Kj
* @version 1.0 r]1|I6:&)
*/ UP:+1Sp9
public class SortUtil { DvnK_Q!
public final static int INSERT = 1; 8<u_ wt@
public final static int BUBBLE = 2; .ao'o,|vE
public final static int SELECTION = 3; Xmy(pV!PF
public final static int SHELL = 4; UC*<]
public final static int QUICK = 5; k}-%NkQ 9O
public final static int IMPROVED_QUICK = 6; 9;;1 "^4/
public final static int MERGE = 7; _-g:T&#
public final static int IMPROVED_MERGE = 8; R{.wAH(
public final static int HEAP = 9; /= P!9d {
hD58 s"L$
public static void sort(int[] data) { \~nUk7.
sort(data, IMPROVED_QUICK); "z^Ysvw&~
} ?|^1-5l3
private static String[] name={ ihH!"HH+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cd}TDd(H%
}; #v-)Ie\F?
t]FFGnBZ
private static Sort[] impl=new Sort[]{ $y=sT({VVe
new InsertSort(), BU:s&+LYUv
new BubbleSort(), ?MeP<5\A
new SelectionSort(), >FHTBh& Y
new ShellSort(), %{/0K<M
new QuickSort(), l)VMF44
new ImprovedQuickSort(), +C\?G/
new MergeSort(), 1`_Mc ]
new ImprovedMergeSort(), 4$.UVW\
new HeapSort() 2ok>z$Y
}; hFa\x5I5
~"EkX
public static String toString(int algorithm){ x#dJH9NR[
return name[algorithm-1]; iG!MIt*
} 3SQ 5C'E
"_'9KBd!
public static void sort(int[] data, int algorithm) { J+?xfg
impl[algorithm-1].sort(data); ?h>mrj
} 1t!Mg{&e[x
8qBRO[
public static interface Sort { 9FK:lFGD
public void sort(int[] data); 2%vwC]A
} :CHCVoh@95
{br4B7b
public static void swap(int[] data, int i, int j) { F$F5N1<
int temp = data; f<|8NQ2y.
data = data[j]; ;5y4v
data[j] = temp; s3kh (N
} V^L;Nw5h
} ;p\rgam