[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; f/U`
} W\>fh&!)
int i1=l; Cz9xZA{[M
int i2=mid+1; mUNn%E:7@{
for(int cur=l;cur<=r;cur++){ q_MPju&*
if(i1==mid+1) [8Y:65
data[cur]=temp[i2++]; _'#n6^Us<
else if(i2>r) ayn)5q/z
data[cur]=temp[i1++]; :">!r.Q
else if(temp[i1] data[cur]=temp[i1++]; Uf1!qP/H?
else [zH:1Zhl&
data[cur]=temp[i2++]; ncZ+gzK|"
} 3OrczJ=[UF
} F8nYV
>"??!|XG^
} e6`Jbu+J<f
jte.Xy~g
改进后的归并排序: 0.\/\V:H6
NG=@ -eu
package org.rut.util.algorithm.support; `"Jj1O@
#Vnkvvv
import org.rut.util.algorithm.SortUtil; kDEXN
x,'(5*
/** &u]8IEv}u
* @author treeroot } +TORR?
* @since 2006-2-2 a[>/h3
* @version 1.0 Q0)#8Rcm
*/ oTEL?hw5
public class ImprovedMergeSort implements SortUtil.Sort { uFX#`^r`
yks__ylrl(
private static final int THRESHOLD = 10; q}b dxa
"0V.V>-p
/* ?1*cO:O
* (non-Javadoc) 8Q.T g.
* ])[[ V!1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OyStqi
*/ )\1QJ$-M&
public void sort(int[] data) { KKb,d0T[
int[] temp=new int[data.length]; IY_iB*T3jt
mergeSort(data,temp,0,data.length-1); ]P9l jwR
} B |5]Jm]
IDad9 Bx
private void mergeSort(int[] data, int[] temp, int l, int r) { ]vz%iv_
int i, j, k; a1g,@0s
int mid = (l + r) / 2; gI&#o@Pm
if (l == r) e+=y*OmQ
return; ,L|%"K]yM
if ((mid - l) >= THRESHOLD) fnpYT:%fG
mergeSort(data, temp, l, mid); Y@NNrGDkT*
else \e:7)R2<!x
insertSort(data, l, mid - l + 1); wVvF^VHV^
if ((r - mid) > THRESHOLD) A9[ F
mergeSort(data, temp, mid + 1, r); R#s)r
else E7WK (
insertSort(data, mid + 1, r - mid); >Ifr [
I:E`PZ
for (i = l; i <= mid; i++) { MH =%-S
temp = data; FDv<\2+ c
} aFl;BhM
for (j = 1; j <= r - mid; j++) { L\37xJo
temp[r - j + 1] = data[j + mid]; ^gN6/>]qrY
} @T@<_ ?)
int a = temp[l]; oro$wFxJO
int b = temp[r]; [NF'oRRD9s
for (i = l, j = r, k = l; k <= r; k++) { ^dI424
if (a < b) { kPKB|kP\
data[k] = temp[i++]; ! :Y:pu0
a = temp; *Hg>[@dP0
} else { 7dN*lks
data[k] = temp[j--]; S:u:z=:r
b = temp[j]; Ve8=b0&Y#j
} &r[`>B{tP
} <S5BDk
} UgRhWV~f0
|{&{
/** d}OTO10
* @param data gLb`pCo/
* @param l 2ElJbN#
* @param i ~b(i&DVK
*/ @tF\p
private void insertSort(int[] data, int start, int len) { bc*X/).
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <NHH^M\N
} vXev$x=w-
} DMs,y{v
} b k~(^!R
} N(O9&L*4fm
%9 SJ E
堆排序： Vo4,@scG
j SHk{T!J
package org.rut.util.algorithm.support; .L+6 $8m
/hpY f]t
import org.rut.util.algorithm.SortUtil; $&Gu)4'+
?(xnSW@r
/** LY+@o<>
* @author treeroot C2.HMgL
* @since 2006-2-2 K> %Tq
* @version 1.0 CVDV)#JA
*/ 36.Z0Z1'F>
public class HeapSort implements SortUtil.Sort{ ke!?BZx
We)xB
/* (non-Javadoc) oph}5Krd)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;^+\K-O]c
*/ .7^c@i[
public void sort(int[] data) { .4S.>~^7
MaxHeap h=new MaxHeap(); n#mA/H;wV
h.init(data); =WyDp97@+
for(int i=0;i h.remove(); %Wg'i!?cB
System.arraycopy(h.queue,1,data,0,data.length); C:GK,?!Jn'
} 9U7nKJ+iby
,t3wp#E2#
private static class MaxHeap{ G%BjhpL
2L!u1
void init(int[] data){ V#v`(j%
this.queue=new int[data.length+1]; b}\N;D.{
for(int i=0;i queue[++size]=data; },uF4M.K
fixUp(size); +20G>y=+
} RXNn[A4xfY
} fAF1"4f
S2E8Gq9
private int size=0; GeI-\F7b
rr/B=O7
private int[] queue; XWnVgY s
5CuuG<0
public int get() { X3(tuqmi
return queue[1]; a,Sw4yJ!Q
} =NpYFKmMhV
FW.7'7G@n
public void remove() { z Eq GD2"
SortUtil.swap(queue,1,size--); 57aXQ8u{
fixDown(1); K)6rY(x >
} ~W*FCG#E
file://fixdown E~,F
private void fixDown(int k) { "7U4'Y:E
int j; 1f%1*L0>@
while ((j = k << 1) <= size) { &)2i[X
if (j < size %26amp;%26amp; queue[j] j++; 0mpX)S
if (queue[k]>queue[j]) file://不用交换 #akpXdXs
break; -N6f1>}pE
SortUtil.swap(queue,j,k); ; a/X<
k = j; %) /s;Q,
} t9nqu!);
} [v7F1@6b
private void fixUp(int k) { wrviR
while (k > 1) { ^/uA?h:]\
int j = k >> 1; <5d~P/,
if (queue[j]>queue[k]) FO+Zue.RS
break; !NIhx109q
SortUtil.swap(queue,j,k); fJ5iS
k = j; j_/>A=OD
} *lYVY)L
} ?fiIwF)
=MSr/O2
} z-BXd
$:BKzHmg
} l~1Oef#y
&]g}u5J!=
SortUtil： -O1>|y2rU
au N6prGe
package org.rut.util.algorithm; ,bXe<L)
}bs+-K
import org.rut.util.algorithm.support.BubbleSort; r~E=4oB7
import org.rut.util.algorithm.support.HeapSort; XywE1}3
import org.rut.util.algorithm.support.ImprovedMergeSort; #[,IsEpDO1
import org.rut.util.algorithm.support.ImprovedQuickSort; %]Fd[pzF
import org.rut.util.algorithm.support.InsertSort; C\\~E9+
import org.rut.util.algorithm.support.MergeSort; :=}BN
import org.rut.util.algorithm.support.QuickSort; ?TM,Q
import org.rut.util.algorithm.support.SelectionSort; %!]@J[*1
import org.rut.util.algorithm.support.ShellSort; wHzEMwY_
!-ok"k0,u
/** 6rh5h:
* @author treeroot W~6EEyD%
* @since 2006-2-2 A]<y:^2])C
* @version 1.0 !4]TXH0f
*/ O80<Z#%j`
public class SortUtil { @>u]4Jn
public final static int INSERT = 1; ;}7Rjl#
public final static int BUBBLE = 2; E08klC0
public final static int SELECTION = 3; >x/z7v?^I
public final static int SHELL = 4; Bs13^^hu
public final static int QUICK = 5; C`K?7v3$m
public final static int IMPROVED_QUICK = 6; nv GF2(;l
public final static int MERGE = 7; 4<9=5q]
public final static int IMPROVED_MERGE = 8; BYpG
public final static int HEAP = 9; ;t'5},(FP
,qA(\[
public static void sort(int[] data) { ^.1)};i
sort(data, IMPROVED_QUICK); ={_C&57N1
} !\"EFVH
private static String[] name={ qUh2hz:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -jW.TT h]
}; 7[w,:9& }
wi;Br[d
private static Sort[] impl=new Sort[]{ 6{x(.=
new InsertSort(), ,kF1T,
new BubbleSort(), C.~,qmOP
new SelectionSort(), F{Z~ R
new ShellSort(), }e!x5g
new QuickSort(), N+++4;
new ImprovedQuickSort(), ! _f9NK
new MergeSort(), YT8vP~
new ImprovedMergeSort(), 5}:-h>
new HeapSort() ?u-|>N>
}; PbW(%7o(t
=V-A@_^!c
public static String toString(int algorithm){ 'r4/e-`pK
return name[algorithm-1]; ]*vdSr-J
} j`oy`78O
tU4s'J
public static void sort(int[] data, int algorithm) { 3XL#0\im?s
impl[algorithm-1].sort(data); Qr1"Tk7s
} ~Am,%"%\
Cf TfL3(J
public static interface Sort { ~KHVY)@P
public void sort(int[] data); ADS9DiX/
} OSlvwH%(EE
M}d_I+
public static void swap(int[] data, int i, int j) { ahuGq'
int temp = data; ?/BqD;{?I
data = data[j]; ;LcVr13J/
data[j] = temp; 9}l33T4T
} .>CPRVuVI
} H!?c\7adX