[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; 9)`amhf>
} WsR+Np@c
int i1=l; G.g|jP'n
int i2=mid+1; St@l]u9
for(int cur=l;cur<=r;cur++){ 17}$=#SX
if(i1==mid+1) %Rp8{.t7
data[cur]=temp[i2++]; rK7W(D}
else if(i2>r) "PMQyzl
data[cur]=temp[i1++]; 1,,|MW
else if(temp[i1] data[cur]=temp[i1++]; %}q.cV
else I&Jt> O4
data[cur]=temp[i2++]; J~KX|QY.S
} brh=NAzt
} +2RNZEc
ebC)H
} +4et7
c%z'xM
改进后的归并排序: F8<"AI
g5+7p@'fV
package org.rut.util.algorithm.support; _;hf<|c
-/ +#5.`1
import org.rut.util.algorithm.SortUtil; ExVDkt0
s~^}F+n
/** {$d<1y^
* @author treeroot *6Q|}b[qcD
* @since 2006-2-2 g # S0V
* @version 1.0 ,zhJY ?sk
*/ 0*8TS7.3
public class ImprovedMergeSort implements SortUtil.Sort { Fv8f+)k)Z~
dRW$T5dac
private static final int THRESHOLD = 10; "Y;}GlE
R_ ZK0ar
/* |A\a4f'G
* (non-Javadoc) OcmRZ
* <YB9Ac~}z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vDFGd-S
*/ 0|c}p([~
public void sort(int[] data) { +lE90y
int[] temp=new int[data.length]; k7@t{Cu0D&
mergeSort(data,temp,0,data.length-1); Dnw|%6Y
} V`kMCE;?l
DF_X
private void mergeSort(int[] data, int[] temp, int l, int r) { $,3J7l3
int i, j, k; CrC=A=e
int mid = (l + r) / 2; QA3/
if (l == r) EON:B>2a
return; 5]5 KB;
if ((mid - l) >= THRESHOLD) s58C2
mergeSort(data, temp, l, mid); V5i*O3a~
else $q$7^r@
insertSort(data, l, mid - l + 1); P 43P]M2
if ((r - mid) > THRESHOLD) U75Jp%bL
mergeSort(data, temp, mid + 1, r); iK5_u2]Q
else =K\r-'V
insertSort(data, mid + 1, r - mid); up>c$jJ
A9BX_9}]
for (i = l; i <= mid; i++) { s{0aBeq
temp = data; H+E$:)gN
} S35~Cp
for (j = 1; j <= r - mid; j++) { ^r6!l.
temp[r - j + 1] = data[j + mid]; ,:LA.o}h
} iOAbaPN
int a = temp[l]; F$BbYf2i
int b = temp[r]; Dre2J<QL
for (i = l, j = r, k = l; k <= r; k++) { EU7|,>a
if (a < b) { br-]fE.be
data[k] = temp[i++]; d.UQW yLG
a = temp; zk-.u}RBFG
} else { JjaoOe
data[k] = temp[j--]; M?m,EQh.
b = temp[j]; -Eu6U`"(
} |L2SFB?d=
} hj'(*ND7z
} *g?Po+ef%
o1M$.*
/** (hiyNMC
* @param data ^8.]d~j
* @param l #@<9S{F
* @param i hxQqa 0B
*/ y;_% W
private void insertSort(int[] data, int start, int len) { ck?YI]q|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |$?bc3
} /|* Y2ETOr
} (L^]Lk x)
} EoK~S\dS
} If\fLhM
SkmT`*v@
堆排序： sI{ M
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package org.rut.util.algorithm.support; ?@E!u|]K
'7XIhN9
import org.rut.util.algorithm.SortUtil; /~zai}
Na:w]r:y
/** M5 <@~V/[
* @author treeroot z11O F
* @since 2006-2-2 C.FI~Z
* @version 1.0 Oil?JI Hq
*/ %}%Qc6.H
public class HeapSort implements SortUtil.Sort{ ZMel{w`n
Uu`9"
/* (non-Javadoc) gP;&e:/3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6_FE4RR[
*/ +F^^c2E
public void sort(int[] data) { [PDNwh0g5
MaxHeap h=new MaxHeap(); u fw]=h)
h.init(data); ME*LHr,
for(int i=0;i h.remove(); (L/_^!ZX
System.arraycopy(h.queue,1,data,0,data.length); "vOwd.(?N
} %^ !,t:d
]@phF _
private static class MaxHeap{ |&zz,+E
i%0ur}p
void init(int[] data){ ]?!mS[X
this.queue=new int[data.length+1]; d'NIV9P`j]
for(int i=0;i queue[++size]=data; Zcx`SC-0
fixUp(size); )8$=C#qC[
} ^SF&=NpV
} zd >t-?g
NgP&.39U
private int size=0; 5Ou`z5S\k
1=d6NX)B
private int[] queue; q1d}{DU
hYG6 pTCb
public int get() { K3#@SYj
return queue[1]; J;8IY=
} j}.\]$J
|}Nn!Sj>#;
public void remove() { Ws|j#X<
SortUtil.swap(queue,1,size--); JR@`2YP-
fixDown(1); 7o#I,d~
} w"Gm;B4
file://fixdown a%/9v"}
private void fixDown(int k) { 8 Hg+H=?
int j; L.*M&Ry
while ((j = k << 1) <= size) { \Je0CD=e`
if (j < size %26amp;%26amp; queue[j] j++; i@"@9n~
if (queue[k]>queue[j]) file://不用交换 iJ1"at
break; $5aV:Z3P
SortUtil.swap(queue,j,k); e> e}vZlX
k = j; eD?tLj
} oAODp!_c
} YNKHN2E8
private void fixUp(int k) { P}n_IV*@
while (k > 1) { N8F~8lTi
int j = k >> 1; e>+i>/Fn{h
if (queue[j]>queue[k]) 5Ha9lM2gh
break; RO+GK`J
SortUtil.swap(queue,j,k); ` Mjj@[
k = j; /R]U}o^/(%
} J\twZ>w~0
} #Z?A2r!1
[=6]+V83M
} i[7\[
LDgrR[
} }~e8e
_S<3\%(0
SortUtil： jS]ru-5.
/M1ob:m
package org.rut.util.algorithm; g:g\>@Umo
VA6}
import org.rut.util.algorithm.support.BubbleSort; N)uSG&S:
import org.rut.util.algorithm.support.HeapSort; 7zXvnxYE
import org.rut.util.algorithm.support.ImprovedMergeSort; 4Tb #fH%
import org.rut.util.algorithm.support.ImprovedQuickSort; SYAyk
import org.rut.util.algorithm.support.InsertSort; ?GKb7Oj
import org.rut.util.algorithm.support.MergeSort; xgVeN["
import org.rut.util.algorithm.support.QuickSort; n4;.W#\
import org.rut.util.algorithm.support.SelectionSort; ?PuBa`zDE
import org.rut.util.algorithm.support.ShellSort; vYwYQG
ysQ_[ ]/
/** Qp)v?k ]
* @author treeroot ;#g"(
* @since 2006-2-2 `06;
* @version 1.0 M'?,] an
*/ hO\<%0F
public class SortUtil { >K_(J/&p
public final static int INSERT = 1; |GdUL%1hnC
public final static int BUBBLE = 2; x|/|jzJSX
public final static int SELECTION = 3; T,,WoPU8t
public final static int SHELL = 4; cvn@/qBq*t
public final static int QUICK = 5; dP9qSwTa
public final static int IMPROVED_QUICK = 6; {2O1"|s ,
public final static int MERGE = 7; Ec!"O3%!M^
public final static int IMPROVED_MERGE = 8; z`.<U{5
public final static int HEAP = 9; dN$0OS`s[
@E&J_un
public static void sort(int[] data) { (yH'{6g\
sort(data, IMPROVED_QUICK); 9'fQHwsJ
} q}i]'7
private static String[] name={ /C:Y94B-z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xT3BHnQ(
}; ~Otq %MQ
&PR5q7
private static Sort[] impl=new Sort[]{ pR*VdC _mY
new InsertSort(), Kfbb)?
new BubbleSort(), NH[kNi'
new SelectionSort(), ;,hwZZA
new ShellSort(), 9g9HlB&Ze
new QuickSort(), z6KCv(zvB
new ImprovedQuickSort(), B{QBzx1L9c
new MergeSort(), iFd+2S%
new ImprovedMergeSort(), ;"a=gr
new HeapSort() wg9t)1k{e
}; 3lf=b~Zi)
y*4=c_Z
public static String toString(int algorithm){ ]&o$b]
return name[algorithm-1]; "|x^|n8i
} e),q0%5
hCi60%g/n
public static void sort(int[] data, int algorithm) { R|6Cv3:
impl[algorithm-1].sort(data); W =D4r
} KI.q@zO6|
8EZ$g<}
public static interface Sort { g{7.r-uu
public void sort(int[] data); :N:yLd} &
} :">!r.Q
9e<.lb^tP
public static void swap(int[] data, int i, int j) { B al`y
int temp = data; Mer/G2#&
data = data[j]; ^ sOQi6pL
data[j] = temp; DHyq^pJ
} `XJG(Oas\
} 4R#chQ