[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; \F1nEj
} ,ypxy/
int i1=l; }PED#Uv
int i2=mid+1; ^1*p]j(
for(int cur=l;cur<=r;cur++){ V{d"cs>9
if(i1==mid+1) ~-W.yg6D{
data[cur]=temp[i2++]; m.V mS7_I
else if(i2>r) 5.GBd_;
data[cur]=temp[i1++]; P92:}" )*>
else if(temp[i1] data[cur]=temp[i1++]; g^0
else Z:Kob b
data[cur]=temp[i2++]; ;P2~cQjD;
} Jt)<RMQ^R
} =602%ef\
#e8CuS
} K[?wP>s
FfD2 &(-R
改进后的归并排序: l" sR\`~
3_33@MM
package org.rut.util.algorithm.support; .S?,%4v%%
>`oO(d}n[0
import org.rut.util.algorithm.SortUtil; W]M[5p]*
N#[/h96F
/** $7BD~U
* @author treeroot k?S-peyRO
* @since 2006-2-2 )3G?5 OTS
* @version 1.0 u[dI81`
*/ VKR6i
public class ImprovedMergeSort implements SortUtil.Sort { YO,GZD`-o
koqH~>ZtD
private static final int THRESHOLD = 10; E&[ox[g{
~4\bR
/* ^8MgNVoJ)
* (non-Javadoc) |=h>3Z=r!
* _')KDy7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [fW:%!Y'
*/ pbgCcO~xm
public void sort(int[] data) { %"KBX~3+Kj
int[] temp=new int[data.length]; w^ DAu1
mergeSort(data,temp,0,data.length-1); ~&yaIuW<
} x1Si&0T0P<
*{-XN
private void mergeSort(int[] data, int[] temp, int l, int r) { ~V./*CQ\c
int i, j, k; f3596a
int mid = (l + r) / 2; L1D%vu`
if (l == r) lT(MywNsg
return; Xt7uCs
if ((mid - l) >= THRESHOLD) D!@c,H
mergeSort(data, temp, l, mid); ?iia
else S8]g'!
insertSort(data, l, mid - l + 1); 99ZQlX
if ((r - mid) > THRESHOLD) RKBtwZx>f
mergeSort(data, temp, mid + 1, r); sF<4uy
else zF{z_c#3@
insertSort(data, mid + 1, r - mid); i\t4TdEx(
nKHyq\
for (i = l; i <= mid; i++) { ?VzST }
temp = data; L~0B
} FvvF4 ,e5
for (j = 1; j <= r - mid; j++) { `Zk?.1*2/
temp[r - j + 1] = data[j + mid]; c^=,@#
} !D6@\
int a = temp[l]; ^$T>3@rDB
int b = temp[r]; 1= <Qnmw
for (i = l, j = r, k = l; k <= r; k++) { ~Aq UT]l
if (a < b) { 35,SPR
data[k] = temp[i++]; a]ftE\99
a = temp; Y)!5Z.K
} else { "C0oFRk
data[k] = temp[j--]; Nz]\%c/-
b = temp[j]; xUeLX`73
} F-ijGGL#
} A!j&g(Z"Q
} (^6SF>'
E8V,".!+E
/** g!K(xhEO
* @param data 9pk<=F
* @param l Z&21gN
* @param i Uh9$e
*/ 2} T"|56
private void insertSort(int[] data, int start, int len) { r?Z8_5Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &]ImO RN
} NDI|;
} &1VC0"YJWy
} >Vg<J~[g
} ,7/N=mz
q'1rSK
堆排序： EmH2 Dbw
yCmiW %L4
package org.rut.util.algorithm.support; W/&cnp\
p'_*>%4~
import org.rut.util.algorithm.SortUtil; tt`b+NOH>
m"xw5aa>
/** /r]IY.
* @author treeroot gE:qMs;
* @since 2006-2-2 +='.uc_
* @version 1.0 cQN}z Ke
*/ ;up89a-,9
public class HeapSort implements SortUtil.Sort{ @y}1%{,%
h"q`gj
/* (non-Javadoc) ymzlRs1^Ct
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N.3M~0M*
*/ }9@,EEhg
public void sort(int[] data) { }t]CDa_n
MaxHeap h=new MaxHeap(); s K s D
h.init(data); 6{1c S
for(int i=0;i h.remove(); Pirc49c
System.arraycopy(h.queue,1,data,0,data.length); b~cN#w #
} @4H*kA
WzZb-F
private static class MaxHeap{ Z.rKV}yjY
3VKArv-
void init(int[] data){ `F(KM '
this.queue=new int[data.length+1]; ^ b}_[B
for(int i=0;i queue[++size]=data; qL3*H\9N
fixUp(size); qf+I2kyS
} ` 8.d
} H{9di\xnEm
^TnBtIU-B
private int size=0; p"Fj6T2
LL.YkYu
private int[] queue; q(_pk&/
4WDh8U
public int get() { 7X1T9'jI2
return queue[1]; KLlW\MF1
} *qGxQ?/
j@Z4(XL
public void remove() { ,GGr@})
SortUtil.swap(queue,1,size--); lS9rgq<n
fixDown(1); P b2exS(
} p]IF=~b
file://fixdown i!jxjP
private void fixDown(int k) { |WlWZ8]
int j; ^qYJx
while ((j = k << 1) <= size) { !SEg4z
if (j < size %26amp;%26amp; queue[j] j++; Svy bP&i|
if (queue[k]>queue[j]) file://不用交换 BEN=/ v
break; c`AtKs)u
SortUtil.swap(queue,j,k); WOR~tS
k = j; V% psaT=)P
} g/'MECB
} hbzU?_}
private void fixUp(int k) { a\aJw[d{
while (k > 1) { #(T
int j = k >> 1; ti3T?_
if (queue[j]>queue[k]) g!cTG-bh>J
break; TDk'
SortUtil.swap(queue,j,k); iIA&\'|;i
k = j; '$;S?6$eW
} 5c!~WckbJ
} Hj$JXo[U
WOG=Uy$
} 3<CCC+47
s9@/(_
} @9-z8PyF
!A,]
SortUtil： +A3@{2
CsJw;]dYI
package org.rut.util.algorithm; x{j|Tf3,G
J9zSBsp_
import org.rut.util.algorithm.support.BubbleSort; V8 }yK$4b
import org.rut.util.algorithm.support.HeapSort; nB WVG
import org.rut.util.algorithm.support.ImprovedMergeSort; p,Qr9p3y
import org.rut.util.algorithm.support.ImprovedQuickSort; ab: yH ')
import org.rut.util.algorithm.support.InsertSort; 2D>WIOX
import org.rut.util.algorithm.support.MergeSort; 5iwJdm
import org.rut.util.algorithm.support.QuickSort; O4S~JE3o
import org.rut.util.algorithm.support.SelectionSort; g%Sl+gWdJ
import org.rut.util.algorithm.support.ShellSort; V*2uW2\}
D:/^TEib
/** VkZrb2]v
* @author treeroot >/Gz*.
* @since 2006-2-2 8lg$]
* @version 1.0 bO8g#rO
*/ @GK0j"_
public class SortUtil { /Z94<}C6b
public final static int INSERT = 1; nGZZCsf <
public final static int BUBBLE = 2; %l(qyH)*
public final static int SELECTION = 3; [?Wt ZM^q
public final static int SHELL = 4; Cq(dj^/~m
public final static int QUICK = 5; Xk8+m>
public final static int IMPROVED_QUICK = 6; esIEi!d
public final static int MERGE = 7; mw-0n
public final static int IMPROVED_MERGE = 8; `<cB 6
public final static int HEAP = 9; q~48lxDU
! av B&Z
public static void sort(int[] data) { ?k CK$P
sort(data, IMPROVED_QUICK); D .oX>L#:
} ^y]CHr
private static String[] name={ o['HiX
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" aqSHo2]DX9
}; RtwlPz<~S
}K!}6?17T
private static Sort[] impl=new Sort[]{ p'M5]G
new InsertSort(), N.vt5WP
new BubbleSort(), PbvRh~n
new SelectionSort(), @`^+XPK\
new ShellSort(), : 9wW*Ix
new QuickSort(), B"ZW.jMaI
new ImprovedQuickSort(), .DiH)
new MergeSort(), i<@6f'Kir
new ImprovedMergeSort(), nlOM4fJ(
new HeapSort() BT.;l I
}; ^I*</w8
w7@fiH{
public static String toString(int algorithm){ [*GIR0
return name[algorithm-1]; 61L vT"
} D~E1hr&Vd>
>~8;H x].d
public static void sort(int[] data, int algorithm) { rJ|Q%utYz
impl[algorithm-1].sort(data); +P:xB0Tm D
} jT}3Zn
=NMT H[
public static interface Sort { [@fw9@_'
public void sort(int[] data); Y_tLSOD#/
} veIR)i@dx
nk|j(D
public static void swap(int[] data, int i, int j) { /n;Ll](ri
int temp = data; :34]}`-
data = data[j]; `?r]OVe{y
data[j] = temp; (C>FM8$J
} 4=!SG4~o
} yr?*{;