[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; ((IBaEq
} !iz vY
int i1=l; ^Th"`Av5
int i2=mid+1; L"^366M!
for(int cur=l;cur<=r;cur++){ 0 Ln5e.&
if(i1==mid+1) IF?B`TmZ
data[cur]=temp[i2++]; 3*23+}^G
else if(i2>r) 7~9f rW<K
data[cur]=temp[i1++]; *gpD4c7A\
else if(temp[i1] data[cur]=temp[i1++]; ,ce^"yG
else MldL"*HW:
data[cur]=temp[i2++]; 5qB=@O]|G;
} u#k6v\/
} qN,FX#DP
%+W >+xRb
} (c|qX-%rC
O)Dw<j)
改进后的归并排序: =Bqa<Js
~acK$.#
package org.rut.util.algorithm.support; B91PlM.
"}aM*(l+\
import org.rut.util.algorithm.SortUtil; _!p$47
eu|q {p
/** e;u8G/
* @author treeroot 4W-+k
* @since 2006-2-2 1E_Ui1[
* @version 1.0 g~D6.OZU
*/ Gv3Fg[MA@c
public class ImprovedMergeSort implements SortUtil.Sort { A|OC?NZY
_5`S)G{
private static final int THRESHOLD = 10; Sg~A'dG
zi[M{bm
/* M{RZ-)IC
* (non-Javadoc) ? Z fhz
* q;~>h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +((31l
*/ u`2k6.-
public void sort(int[] data) { Afl'-
int[] temp=new int[data.length]; 17 iq
mergeSort(data,temp,0,data.length-1); JJ3JULL2
} MFsy`aiS
y%l#lz=6
private void mergeSort(int[] data, int[] temp, int l, int r) { nv Gd:]Z
int i, j, k; yzl\{I&
int mid = (l + r) / 2; n k3lC/f
if (l == r) ",_
return; &V{,D))6[
if ((mid - l) >= THRESHOLD) "(VcYQ+
mergeSort(data, temp, l, mid); =}lA|S
else ;7*@Gf}R
insertSort(data, l, mid - l + 1); M:f=JuAx
if ((r - mid) > THRESHOLD) 80>!qG
mergeSort(data, temp, mid + 1, r); =_6h{f&Q
else ?O Nw*"9
insertSort(data, mid + 1, r - mid); y.<Y]m
3m7V6##+
for (i = l; i <= mid; i++) { 5FKd{V'
temp = data; Z-!T(:E]
} [&s:x,
for (j = 1; j <= r - mid; j++) { ; O0rt1
temp[r - j + 1] = data[j + mid]; -RDs{c`y%N
} fG5}'8
int a = temp[l]; o^6j(~
int b = temp[r]; X6 :~Rjim*
for (i = l, j = r, k = l; k <= r; k++) { #;]F:TlR
if (a < b) { 0 d]G
data[k] = temp[i++]; ^ w1R"qE"m
a = temp; 2` qXDfD`
} else { umn^QZ,
data[k] = temp[j--]; V3UGx'@^y
b = temp[j]; B`EgL/Wg[
} uNBhVsM6<
} dF]8>jBOL
} )KQum`pO
~riw7"
/** b<7qmg3
* @param data .w)t<7 y
* @param l #_\~Vrf(#
* @param i A@'W $p?5r
*/ E=trJge
private void insertSort(int[] data, int start, int len) { 6LQO>k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ZfikNQU9r
} C;>Ll~f_
} <Rt@z|Zv
} B(dL`]@Xm
} 6s2g+[
Ma#-'J
堆排序： m/Z_HER^
hh}EDnx
package org.rut.util.algorithm.support; NZP,hAUK,
B[V=l<J
import org.rut.util.algorithm.SortUtil; h_!"CF<n
fTgN2U
/** 'YZs6rcJ
* @author treeroot [G/X
* @since 2006-2-2 ;d40:q<
* @version 1.0 ro@BmRMW
*/ c Zr4
public class HeapSort implements SortUtil.Sort{ Z.JTq~`I
KZNyp%q
/* (non-Javadoc) /d'u1FnA=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s&</zU'
*/ k#[s)Ja?s
public void sort(int[] data) { !o!04_
MaxHeap h=new MaxHeap(); gs>cx]>
h.init(data); ic#drpl,
for(int i=0;i h.remove(); @eWx4bl
System.arraycopy(h.queue,1,data,0,data.length); i-b7
} )`-]nMc
DUr1s]+P
private static class MaxHeap{ Km-B=6*QY
Wz]S+IpY
void init(int[] data){ &@-glF5
this.queue=new int[data.length+1]; K e8cfd~c
for(int i=0;i queue[++size]=data; $n"Llw&)
fixUp(size); L+L9)8FJ
} 06$9Uz9
} )`^:G3w
{5JXg9um
private int size=0; C-Z,L#
}1dh/Cc`
private int[] queue; Tp13V.|
LAeXe!y
public int get() { DBRJtU!5x
return queue[1]; }dM^6 Kd%
} qQ_QF
D6WsEd>
public void remove() { GZo4uwG@a
SortUtil.swap(queue,1,size--); <~OyV5:6
fixDown(1); ND>}t#^$
} _#:1Axx1
file://fixdown 0*^Fk=>ej
private void fixDown(int k) { (tvh9o
int j; nabN.Ly
while ((j = k << 1) <= size) { L?fv5 S3
if (j < size %26amp;%26amp; queue[j] j++; !w Bmf&=
if (queue[k]>queue[j]) file://不用交换 .$iIr:Tc>
break; U|nk86r
SortUtil.swap(queue,j,k); i}19$x.D`
k = j; 8Yh2K}
} f/ZE_MN2
} f]}F_]
private void fixUp(int k) { }UrtDXhA
while (k > 1) { xo$ZPnf(zv
int j = k >> 1; "K<VZ
if (queue[j]>queue[k]) hj4Rr(T
break; vkK+ C~"
SortUtil.swap(queue,j,k); \bfHGo=
k = j; RAC-;~$WB
} ./d (@@
} ?x@khzk
!MC Wt
} G.}yNjL8
@w0[5ZAj
} (EX
w3@te\
SortUtil： x-<dJ}`
qJ@?[|2R
package org.rut.util.algorithm; i*<,@*
$$@Tgkg?o
import org.rut.util.algorithm.support.BubbleSort; 5kF5`5+Vj
import org.rut.util.algorithm.support.HeapSort; _*9Zp1r
import org.rut.util.algorithm.support.ImprovedMergeSort; e9d~Xi16KY
import org.rut.util.algorithm.support.ImprovedQuickSort; ^4"_I
import org.rut.util.algorithm.support.InsertSort; EB#z\
import org.rut.util.algorithm.support.MergeSort; yl}Hr*
import org.rut.util.algorithm.support.QuickSort; 7@FB^[H:y
import org.rut.util.algorithm.support.SelectionSort; Ogb_WO;)
import org.rut.util.algorithm.support.ShellSort; ( nh!tC
A SSoKrFL
/** C N"c
* @author treeroot G\Me%{b#
* @since 2006-2-2 S%@$J~\rx
* @version 1.0 JI&>w-~D
*/ ezn>3?S
public class SortUtil { Ut+mm\7
public final static int INSERT = 1; bA)Xjq)Rr
public final static int BUBBLE = 2; ^?2txLv,6
public final static int SELECTION = 3; [3.rG!Na
public final static int SHELL = 4; HIF]c
public final static int QUICK = 5; Aq"_hjp
public final static int IMPROVED_QUICK = 6; [>-k(D5D
public final static int MERGE = 7; HZT;7<
public final static int IMPROVED_MERGE = 8; $spf=t"nh
public final static int HEAP = 9; uMI2Wnnc:/
j!s&yHE1
public static void sort(int[] data) { F,sT[C
sort(data, IMPROVED_QUICK); _W;u Qg']
} aqB^ %e
private static String[] name={ 0e7!_/9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" YblRwic
}; Y%faf.$/9
Ol? 2Qy.2)
private static Sort[] impl=new Sort[]{ .#n?^73
new InsertSort(), ?]t8$^m,;
new BubbleSort(), V/Q6v YX
new SelectionSort(), /a q%l]hQ@
new ShellSort(), vZ08/!n
new QuickSort(), 4Z_.Jdu w
new ImprovedQuickSort(), gvC2\k{
new MergeSort(), -4Xr5j%o
new ImprovedMergeSort(), lcr=^
new HeapSort() )oj`K,#
}; <n><A+D
M(|gfsD
public static String toString(int algorithm){ AKpux,@xB
return name[algorithm-1]; s+[=nau('w
} {t7 M
BXdT;b"J(
public static void sort(int[] data, int algorithm) { %VMazlM15
impl[algorithm-1].sort(data); rdb%/@.-
} |3i~?] A
NB^.$39n
public static interface Sort { J=$v+8&.
public void sort(int[] data); sJr$[?
} C>+UZ
3!,%;Vz=
public static void swap(int[] data, int i, int j) { {\V)bizY;
int temp = data; DirWe
data = data[j]; t3M/ThIE
data[j] = temp; ,Xn%-OT
} ESO(~X+
} IQM!dC