[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; jz"-E
} `d6,]'
int i1=l; .:V4>
int i2=mid+1; To@77.'
for(int cur=l;cur<=r;cur++){ 6BIr{SY
if(i1==mid+1) =%ZR0cWPoI
data[cur]=temp[i2++]; 9G=HG={
else if(i2>r) CWW|?
data[cur]=temp[i1++]; b5.L== >
else if(temp[i1] data[cur]=temp[i1++]; F uJ=]T
else SJXP}JB_
data[cur]=temp[i2++]; Mv#\+|p 1x
} tX 3y{W10"
} :elTqw>pn
2"C,u V@F!
} I4%25=0?
]#t5e>o|
改进后的归并排序: p4M7BK:nf
0D:eP``
package org.rut.util.algorithm.support; L qdzqq
WuUT>omH
import org.rut.util.algorithm.SortUtil; sad[(|
:Co+haW
/** "pW@[2Dkx/
* @author treeroot TSHH=`cx
* @since 2006-2-2 Z&Ao;=Gp1
* @version 1.0 A!.* eIV|
*/ xA {1XS}
public class ImprovedMergeSort implements SortUtil.Sort { )!jX$bK
&p6^
private static final int THRESHOLD = 10; +U= !svE
RuuXDuu:VL
/* Zg~6
* (non-Javadoc) #;~dA
* &RbT&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'Bb@K[=s
*/ /woC{J)4p
public void sort(int[] data) { <N}*|z7=b
int[] temp=new int[data.length]; ![CF >:e
mergeSort(data,temp,0,data.length-1); ! tPHT
} r,-9]?i
ug.'OR
private void mergeSort(int[] data, int[] temp, int l, int r) { >$dkA\&p
int i, j, k; k:k!4
int mid = (l + r) / 2; BLQD=?Q
if (l == r) ;gmfWHB<
return; Y%A KN
if ((mid - l) >= THRESHOLD) H]d'#1G
mergeSort(data, temp, l, mid); M+Jcgb]
else ;$>wuc'L
insertSort(data, l, mid - l + 1); gP 6`q
if ((r - mid) > THRESHOLD) c0M>CaKD
mergeSort(data, temp, mid + 1, r); J0a#QvX!
else "Ir.1FN
insertSort(data, mid + 1, r - mid); Mh;rhQ
g1zX^^nd,V
for (i = l; i <= mid; i++) { "}'Sk(
temp = data; Q]NGd 0J
} ^tY$pPA
for (j = 1; j <= r - mid; j++) { 96.Vm*/7
temp[r - j + 1] = data[j + mid]; 5*31nMP\
} cAAyyc"yJ
int a = temp[l]; wc6v:,&
int b = temp[r]; Pu7cL
for (i = l, j = r, k = l; k <= r; k++) { At=l>
if (a < b) { Qpaan
data[k] = temp[i++]; E+|r h-M7
a = temp; vspub^;5\
} else { 8 y+Nl&"V
data[k] = temp[j--]; 2lm{:tS
b = temp[j]; baL-~`(T
} e+=IGYC
} "=r"c$xou
} #w:6<$
b/dyH
/** Jb4A!g5C
* @param data UZq1qn@+
* @param l jQ[M4)>_k`
* @param i +HxL>\
*/ dxIt.h
private void insertSort(int[] data, int start, int len) { `GD>3-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); WCPl}7>
} q|fZdTw
} !NfN16
} Rf.b_Y@O
} [6Nw)r(a(
zLHE;
堆排序： 7/$s!pV
A"8"e*
package org.rut.util.algorithm.support; b!ea(D!:
6bW:&IPQ;
import org.rut.util.algorithm.SortUtil; :5M7*s)e16
xHMbtY
/** K@PQLL#yJp
* @author treeroot :x<'>)6
* @since 2006-2-2 kW=GFj)L
* @version 1.0 umo@JWr
*/ fsDwfwil*
public class HeapSort implements SortUtil.Sort{ >IzUn: 0F
td6$w:SN,l
/* (non-Javadoc) m+m,0Ey5H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "RF<i3{S
*/ 3h|:ew[
public void sort(int[] data) { P5*~Wi`
MaxHeap h=new MaxHeap(); 7>`VZ?
h.init(data); g, %xGQ4+
for(int i=0;i h.remove(); HX3R@^vo
System.arraycopy(h.queue,1,data,0,data.length); <Y9xHn&
} %4Thb\T
bqt*d)$
private static class MaxHeap{ tsA+B&R_]
VYZkHjj)2i
void init(int[] data){ #+- /0{HT
this.queue=new int[data.length+1]; m% {4
for(int i=0;i queue[++size]=data; =tv,B3Mo
fixUp(size); 1E*No1
} %EooGHGF?
} ~KufSt*
.#] V5g,
private int size=0; R""P01IZH
oVLgHB\zL
private int[] queue; URodvyD
=a<};X
public int get() { &l=%*`On
return queue[1]; M=hH:[6 &
} >7VOytc
uWYI p\NN
public void remove() { s2{d<0x?v
SortUtil.swap(queue,1,size--); ?1?zmaS
fixDown(1); D{{ME8
} %`P6a38j
file://fixdown R`F54?th
private void fixDown(int k) { b$f@.L
int j; lKd+,<
while ((j = k << 1) <= size) { \P;%fN
if (j < size %26amp;%26amp; queue[j] j++; G' ~Z'
if (queue[k]>queue[j]) file://不用交换 mOb*VH
break; 5xm^[o2#y
SortUtil.swap(queue,j,k); >h0iq
k = j; V #0F2GV<,
} 6_m5%c~;+r
} 3U<\s=1?X
private void fixUp(int k) { &;%z1b>F
while (k > 1) { o 26R]
int j = k >> 1; 0Jh^((i*
if (queue[j]>queue[k]) 1XAXokxj
break; Gyak?.@R
SortUtil.swap(queue,j,k); (hB&OP5Fne
k = j; 9U_uw Rv2
} t?:}bw+m
} H+`s#'(i_P
3TRzDE(J
} )")_aA
>xU$)uE&
} )x/Spb
UJXRL
SortUtil： +mQMzZZTZ
9y(75Bn9
package org.rut.util.algorithm; R&cOhUj22J
37hs/=x
import org.rut.util.algorithm.support.BubbleSort; R#ABda9
import org.rut.util.algorithm.support.HeapSort; GHaOFLY
import org.rut.util.algorithm.support.ImprovedMergeSort; .a%D:4GYR
import org.rut.util.algorithm.support.ImprovedQuickSort; ,Jy@n]x
import org.rut.util.algorithm.support.InsertSort; +!'\}"q
import org.rut.util.algorithm.support.MergeSort; OSk+l
import org.rut.util.algorithm.support.QuickSort; [i18$q5D
import org.rut.util.algorithm.support.SelectionSort; prvvr;Ib
import org.rut.util.algorithm.support.ShellSort; phu`/1;p
@_Ko<fKSX
/** "lcNjyU\O
* @author treeroot ZqhCGHy
* @since 2006-2-2 #,0PLU3%
* @version 1.0 YRXXutm
*/ +*2]R~"M
public class SortUtil { @)A)cBv#
public final static int INSERT = 1; zI5#'<n
public final static int BUBBLE = 2; Zl69d4vG
public final static int SELECTION = 3; ?MT V!i0
public final static int SHELL = 4; O,`#h*{N
public final static int QUICK = 5; @l)HX'z0d
public final static int IMPROVED_QUICK = 6; 2D;,'
public final static int MERGE = 7; w-%V9]J1
public final static int IMPROVED_MERGE = 8; <9JI@\>
public final static int HEAP = 9; iGxlB
"@1e0`n Q
public static void sort(int[] data) { 3;@/`Z_\lt
sort(data, IMPROVED_QUICK); 'OIOl
} S+^*rw
private static String[] name={ vUEG0{8l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t$NK{Mw5_
}; Z)?i&y?
&Kuo|=f
private static Sort[] impl=new Sort[]{ kdVc;v/5
new InsertSort(), Zl5cHejM
new BubbleSort(), dzIcX*"
new SelectionSort(), |JZ3aS
new ShellSort(), v~f_~v5J!
new QuickSort(), #k%$A}9
new ImprovedQuickSort(), &cDLSnR
new MergeSort(), Hc`)Q vFRW
new ImprovedMergeSort(), UF3g]>*
new HeapSort() \qx$h!<
}; >WfkWUb
OAoTsqj6
public static String toString(int algorithm){ f)`_su U
return name[algorithm-1]; \LYB% K}
} snPM&
xq`mo
public static void sort(int[] data, int algorithm) { OF[y$<jM
impl[algorithm-1].sort(data); MKqMH,O
} ,/?7sHK-0
SG:Fn8
public static interface Sort { KIyhvY~
public void sort(int[] data); O$F<x,
} mlq+Z#9
Akar@wh
public static void swap(int[] data, int i, int j) { en6Kdqe
int temp = data; ZY_aE
data = data[j]; F E`4%X
data[j] = temp; (x;Uy
} :@mBSE/
} -~ w5yd