[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; ik0Q^^1?Y
} ULmdt
int i1=l; {0WIDD
int i2=mid+1; s^'#"`!v=
for(int cur=l;cur<=r;cur++){ M`pTT5r
if(i1==mid+1) .t[ZXrd|0
data[cur]=temp[i2++]; .+L_!A
else if(i2>r) 6-14Htsk6
data[cur]=temp[i1++]; 4Olv8nOe<
else if(temp[i1] data[cur]=temp[i1++]; aw%vu
else P3ev4DL
data[cur]=temp[i2++]; L4*fF
} b(-t)5^}
} }.V0SM6
<sYw%9V
} 7C7(bg,7^
/ !
改进后的归并排序: {&u7kWD|
T^;Jz!e
package org.rut.util.algorithm.support; ss@}Dt^
}6,bq`MN
import org.rut.util.algorithm.SortUtil; UJ)M:~O
O8~U<'=*
/** C"Q=(3
* @author treeroot AnE_<sPA
* @since 2006-2-2 \ +-hn
* @version 1.0 =)1YYJTe9
*/ $o$Ev@mi
public class ImprovedMergeSort implements SortUtil.Sort { jsi#l
P|P fG=
private static final int THRESHOLD = 10; Iki+5
) a\DS yr
/* >c\v&k>6.
* (non-Javadoc) .O%1)p
* CSqb)\8Oi*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )bXx9,VL
*/ akc"}+-oX
public void sort(int[] data) { h)l&K%4;
int[] temp=new int[data.length]; qb&NS4#
mergeSort(data,temp,0,data.length-1); sa(M66KkU
} -WBz]GW4r
n5*{hi
private void mergeSort(int[] data, int[] temp, int l, int r) { Fp6[W5>(-
int i, j, k; <Dj$0g
int mid = (l + r) / 2; +6M+hO]
if (l == r) 0H&U=9'YT
return; ji)4WG/1
if ((mid - l) >= THRESHOLD) 2DCcGKa"
mergeSort(data, temp, l, mid); H0b6ZA%n
else ivUsMhx>S,
insertSort(data, l, mid - l + 1); !0csNg!
if ((r - mid) > THRESHOLD) uyRA`<&w
mergeSort(data, temp, mid + 1, r); s!;VUr\
else <AAZ8#^
insertSort(data, mid + 1, r - mid); r|\'9"@
eo*u(@
for (i = l; i <= mid; i++) { 6n6VEwYj
temp = data; p1VahjRE-
} e(;`9T
for (j = 1; j <= r - mid; j++) { 'UvS3]bSYW
temp[r - j + 1] = data[j + mid]; @wdB%
} R4~zL!7;
int a = temp[l]; Wt)SdF=U/
int b = temp[r]; 4>"cc@8&~
for (i = l, j = r, k = l; k <= r; k++) { )lDIzLp
if (a < b) { q4.dLU,1
data[k] = temp[i++]; 'f?&EsIV?
a = temp; tC@zM.v%
} else { mQ^@ \s
data[k] = temp[j--]; o&XMgY~
b = temp[j]; OBw`!G*w
} _[{:!?-?
} ,7fc41O3V
} bDFCZH-:'O
(&P0la1
/** gR-Qj
* @param data qv0 DrL,3
* @param l 'Elj"Iiu
* @param i o,Tr^e$
*/ v<7Gln
private void insertSort(int[] data, int start, int len) { D _bkUR1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +{C9uY)$vf
} `J=1&ae{
} >\?z37:T
} Yf!*OGF
} V^`?8P8d
(+gL#/u
堆排序： |:(23O
inPdV9
package org.rut.util.algorithm.support; =(|xU?OL
Vh#Mp!
import org.rut.util.algorithm.SortUtil; t;LX48TQ
,na=~.0R:
/** N,/BudFo
* @author treeroot L'\/)!cEd
* @since 2006-2-2 b,rH&+2H
* @version 1.0 2i7i\?<.
*/ s?@)a,C%k
public class HeapSort implements SortUtil.Sort{ <nb3~z1
$p0 /6c
/* (non-Javadoc) vlPl(F1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FV^4
*/ aucZJjH
public void sort(int[] data) { 1~R$$P11[9
MaxHeap h=new MaxHeap(); R*Xu(89
h.init(data); sMz^!RX@
for(int i=0;i h.remove(); ?}=-eJ(7e
System.arraycopy(h.queue,1,data,0,data.length); dDqr B-G
} J~iOP
W8G9rB|T
private static class MaxHeap{ MS st
)H;pGM:
void init(int[] data){ C?w<$DU
this.queue=new int[data.length+1]; &$b\=
for(int i=0;i queue[++size]=data; TDAWI_83-
fixUp(size); t":W.q<
} %K%^ ]{
} q?imE~&U
'nlRY5@2
private int size=0; 7>'uj7r]=
e' U"`)S
private int[] queue; %Le:wC
y^mWG1"O
public int get() { b(}Gm@#
return queue[1]; ^nHB1"OCV
} XDpfpJ,z"}
n%0]V Xx#
public void remove() { 2/v35| ?
SortUtil.swap(queue,1,size--); 6Iv(
fixDown(1); 2ec$xms
} t_I\P.aMA
file://fixdown 1jH7<%y
private void fixDown(int k) { 6WE&((r^
int j; ^s^JzFw
while ((j = k << 1) <= size) { 2gd<8a''
if (j < size %26amp;%26amp; queue[j] j++; 6%gB E
if (queue[k]>queue[j]) file://不用交换 9^ >M>f"
break; )YzHk ;(
SortUtil.swap(queue,j,k); XMN?;Hj>
k = j; 6o=qJ`m[?
} xH_A@hf;
} Lh8bQH
private void fixUp(int k) { =zeFK_S!
while (k > 1) { %s$rP
int j = k >> 1; w~kHQ%A
if (queue[j]>queue[k]) ioC@n8_[G
break; ~Na=+}.q_
SortUtil.swap(queue,j,k); a -xW8
k = j; "t[M'[ `C
} On{~St'V
} lQV|U;~D
_ yfdj[Ot`
} X5uS>V%/
] vC=.&]
} 1Yc%0L(
hD nM+4D
SortUtil： _\ .
<u/a`E?
package org.rut.util.algorithm; _4P;+Y
.UM<a Ik
import org.rut.util.algorithm.support.BubbleSort; "sF Xl
import org.rut.util.algorithm.support.HeapSort; LXHwX*`Y
import org.rut.util.algorithm.support.ImprovedMergeSort; 7"ylN"syZ
import org.rut.util.algorithm.support.ImprovedQuickSort; jW-;4e*H=V
import org.rut.util.algorithm.support.InsertSort; AIuMX4nb
import org.rut.util.algorithm.support.MergeSort; -"W)|oC_
import org.rut.util.algorithm.support.QuickSort; :8p&#M
import org.rut.util.algorithm.support.SelectionSort; BRQ"A,
import org.rut.util.algorithm.support.ShellSort; aB6Ye/Io
1<xcMn0et
/** KxO/]
* @author treeroot )46 0Ed
* @since 2006-2-2 rkxW UDl
* @version 1.0 :{[<g](
*/ u5Qp/ag?N
public class SortUtil { I"Q#IvNw
public final static int INSERT = 1; %x&F4U
public final static int BUBBLE = 2; dCB&c^
public final static int SELECTION = 3; U?bG`. X
public final static int SHELL = 4; c]A Y
public final static int QUICK = 5; M'yO+bu
public final static int IMPROVED_QUICK = 6; ]e^R@w
public final static int MERGE = 7; MV%Xhfk
public final static int IMPROVED_MERGE = 8; )-=2w-ZX
public final static int HEAP = 9; mJ)tHv"7
TE3*ktB{N
public static void sort(int[] data) { (# JMB)
sort(data, IMPROVED_QUICK); @Z?7E8(
} 6fh{lx>
private static String[] name={ yZq?B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" LO"_NeuL
}; B;VH`*+X
>&bv\R/
private static Sort[] impl=new Sort[]{ Rr%tbt.sE
new InsertSort(), $bk>kbl P
new BubbleSort(), aK]7vp+
new SelectionSort(), E@:Q 'g%
new ShellSort(), TbOJp
new QuickSort(), [}z?1Gj;W(
new ImprovedQuickSort(), r)VLf#3B
new MergeSort(), XZ}de%U1
new ImprovedMergeSort(), `)"tO&Fn
new HeapSort() lp(Nv(S
}; 4[`[mE18.
{5>3;.
public static String toString(int algorithm){ - $%jb2
return name[algorithm-1]; )AOPiC$jL
} o6*/o ]]
sp|q((z{
public static void sort(int[] data, int algorithm) { +9RJ%i&Ec
impl[algorithm-1].sort(data); yL.^ =
} +Y7Pg'35
M~-h-tG
public static interface Sort { V|TA:&:7
public void sort(int[] data); z;J
} JfMJF[Mb
QV0M/k<'
public static void swap(int[] data, int i, int j) { @|DmE!)
int temp = data; ;TtaH
data = data[j]; XJUEwX
data[j] = temp; b7bSTFZxC
} bZ/ hgqS
} h0|[etaf