[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; U9:)qvMXe
} t`H1]`c?
int i1=l; D!o[Sm}JO[
int i2=mid+1; fIoc)T
for(int cur=l;cur<=r;cur++){ d^}p#7mB\
if(i1==mid+1) H]/~ #a
data[cur]=temp[i2++]; 031"D*W'i
else if(i2>r) {Ge{@1
data[cur]=temp[i1++]; UN.;w3`Oc
else if(temp[i1] data[cur]=temp[i1++]; {1Ra|,;
else (+|+ELfqW
data[cur]=temp[i2++]; V8M()7uJ
} uslu-|b!%
} "@nH;Xlq
4?+K `
} -"I$$C
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改进后的归并排序: ,'|J
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package org.rut.util.algorithm.support; N55F5
:VT%d{Vp_
import org.rut.util.algorithm.SortUtil; 9!_,A d;3
g{]6*`/Z
/** #%;Uh
* @author treeroot .]vb\NBK7
* @since 2006-2-2 3}H{4]*%_
* @version 1.0 ;_bRq:!j;
*/ Uqel UL}
public class ImprovedMergeSort implements SortUtil.Sort { wb.yGfJ
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private static final int THRESHOLD = 10; {cs>Sy 4
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/* 64?HqO 6(
* (non-Javadoc) S.!,qv z
* .2E/(VM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0zH-g
*/ <_xG)vwh.
public void sort(int[] data) { E5^\]`9P
int[] temp=new int[data.length]; :01d9|#
mergeSort(data,temp,0,data.length-1); ;mU;+~YE
} EVqW(|Xg
PGP#$JC
private void mergeSort(int[] data, int[] temp, int l, int r) { O6G\0o
int i, j, k; KHAc!4lA
int mid = (l + r) / 2; ~!Nj DDk
if (l == r) fmuh9Z
return; "A}sD7xy9
if ((mid - l) >= THRESHOLD) 6'^E ],:b
mergeSort(data, temp, l, mid); ;TJpD0
else sq2:yt
insertSort(data, l, mid - l + 1); /2Wg=&H
if ((r - mid) > THRESHOLD) BXYHJ
mergeSort(data, temp, mid + 1, r); sQ}|Lu9hZ
else 3xy2ZYw
insertSort(data, mid + 1, r - mid); rE m/Q!
oy8jc];SO
for (i = l; i <= mid; i++) { `> %QCc\
temp = data; gE6'A
} Ar!0GwE+
for (j = 1; j <= r - mid; j++) { t%Jk3W/f
temp[r - j + 1] = data[j + mid]; kGV:=h
} MrR`jXz
int a = temp[l]; "QnYT3[l"
int b = temp[r]; c~vhkRA
for (i = l, j = r, k = l; k <= r; k++) { %hSQ\T<8[o
if (a < b) { j,j|'7J%
data[k] = temp[i++]; "TA0--6
a = temp; LaQ7A,]
} else { h+W$\T)
data[k] = temp[j--]; 'f6H#V*C
b = temp[j]; @[g7\d
} 3jAr"xc
} O t)}:oG
} &4:R(]|
M(a%Qk?]/
/** Fx:38Ae
* @param data >%tG[jb
* @param l |SOLC
* @param i }MQ:n8
*/ Og1-LP|X
private void insertSort(int[] data, int start, int len) { \U$:/#1Oe
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); BH0m[9nU;
} 76tn`4NIP
} eUy*0
} &[[r|
} Nm"P8/-09
NBPP?\1
堆排序： !i"zM}
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package org.rut.util.algorithm.support; uHKEt[PS$
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import org.rut.util.algorithm.SortUtil; 76!LMNf
:i<*~0r<
/** JdS,s5Z>
* @author treeroot R;!,(l
* @since 2006-2-2 !mxH/{+|n
* @version 1.0 BEOPZ[Q|c
*/ hWy@?r.
public class HeapSort implements SortUtil.Sort{ +cH>'OXoB
tKV,
/* (non-Javadoc) ?0; 2ct
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TaRPMKk
*/ Cx2# 0$
public void sort(int[] data) { tczJk1g}
MaxHeap h=new MaxHeap(); <[[yV
h.init(data); yUnV%@.
for(int i=0;i h.remove(); 7W)W9=&BT
System.arraycopy(h.queue,1,data,0,data.length); dx@dnWRT,
} &G"s!:
%&6QUv^
private static class MaxHeap{ D|ceZ <9x
Eiu/p&ct
void init(int[] data){ 2K9X(th1
this.queue=new int[data.length+1]; !'N@ZZ
for(int i=0;i queue[++size]=data; m54>}
fixUp(size); %>&ex0j]
} D"pT?\kO
} z6R|1L 1
p-iFe\+
private int size=0; y^C5_w(^jZ
h^ Cm\V
private int[] queue; {IgH0+z
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public int get() { ;M.Q=#;E
return queue[1]; 0OM^,5%8
} M=raKb?F
4 eLZ
public void remove() { 1b3 a(^^E
SortUtil.swap(queue,1,size--); DKjiooD
fixDown(1); .Exvuo`F
} f]i"tqoI
file://fixdown =6~
private void fixDown(int k) { fn,n'E]
int j; dcY(1p)
while ((j = k << 1) <= size) { D\THe-Vtr
if (j < size %26amp;%26amp; queue[j] j++; zpwoK&T+
if (queue[k]>queue[j]) file://不用交换 m8L *LB
break; KM;H '~PZi
SortUtil.swap(queue,j,k); ,1{qZ(l1
k = j; a]r+np]vTy
} t)&U'^
} 3Z";a
private void fixUp(int k) { ?+Gt?-! 5q
while (k > 1) { &b|RoPV
int j = k >> 1; vQ}ZfP
if (queue[j]>queue[k]) YD[HBF)~j
break; 5[4wN( )
SortUtil.swap(queue,j,k); qHub+"2
k = j; -*k2:i`
} &za }THm
} <J<"`xKL
K80f_iT5
} ,,uhEoH
;8^k=8
} H1c8]}
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SortUtil： Ss%Cf6qdWL
g)#?$OhP"
package org.rut.util.algorithm; dM;\)jm
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import org.rut.util.algorithm.support.BubbleSort; AAQ!8!
import org.rut.util.algorithm.support.HeapSort; f5*qlQJFz\
import org.rut.util.algorithm.support.ImprovedMergeSort; ZR\N~.
import org.rut.util.algorithm.support.ImprovedQuickSort; C7dq=(p&
import org.rut.util.algorithm.support.InsertSort; Q#3}AO
import org.rut.util.algorithm.support.MergeSort; @4y?XL(n
import org.rut.util.algorithm.support.QuickSort; 4MPy}yT*
import org.rut.util.algorithm.support.SelectionSort; ^y@ W\
import org.rut.util.algorithm.support.ShellSort; $U?]^
svmb~n&x6
/** Ef`'r))
* @author treeroot B{)#A?Rh.
* @since 2006-2-2 >T]9.`xhK
* @version 1.0 I$.lFQ%(
*/ nriSVGi
public class SortUtil { OdFF)-K>~
public final static int INSERT = 1; i(|ug_^
public final static int BUBBLE = 2; 4*}&nmW
public final static int SELECTION = 3; 2A\b-;4EP
public final static int SHELL = 4; r<ww%2HTS
public final static int QUICK = 5; LL e*|:
public final static int IMPROVED_QUICK = 6; p/(Z2N"
public final static int MERGE = 7; #$Zx].[lc
public final static int IMPROVED_MERGE = 8; r2SZC`Z}-M
public final static int HEAP = 9; {Phq39g
2VY7?1Ab(@
public static void sort(int[] data) { :4zu.
sort(data, IMPROVED_QUICK); le \f:
} trDw|WA
private static String[] name={ !Wr<T!T
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )l`Ks
}; +A?P4}
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private static Sort[] impl=new Sort[]{ G{[w+ObX
new InsertSort(), k( Sda>-
new BubbleSort(), e#/&A5#Ya
new SelectionSort(), QwX81*nx
new ShellSort(), Zy+ERaF|]
new QuickSort(), 5@5*}[M
new ImprovedQuickSort(), uMDd Zj&
new MergeSort(), ?7NSp2aq2A
new ImprovedMergeSort(), UK,bfLPt~
new HeapSort() ?L0;, \-t
}; -u@ ^P7
r{.pXf
public static String toString(int algorithm){ j;.P
return name[algorithm-1]; B}TY+@
} 0 8)f
:j`f%Vg~x
public static void sort(int[] data, int algorithm) { h"ZIh= j@
impl[algorithm-1].sort(data); `R2Iw I&
} ?+EAp"{j
UWO3sZpU
public static interface Sort { /V*SI!C<f
public void sort(int[] data); F% n}vA`
} tn$TyCzckW
z6U'"T"a
public static void swap(int[] data, int i, int j) { 4tkT\.
int temp = data; \C$e+qb~{
data = data[j]; )f$4:Pq
data[j] = temp; L6CI9C;-b
} bIGcszWr
} -m}'I8