[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; ?2i``-|Wa
} s5[ Cr"q7B
int i1=l; AKHi$Bk
int i2=mid+1; s*Fmu7o43
for(int cur=l;cur<=r;cur++){ 2yN~[,L
if(i1==mid+1) 68D.Li
data[cur]=temp[i2++]; /1^%32c
else if(i2>r) [k.<x'#
data[cur]=temp[i1++]; v3[ 2!UXq
else if(temp[i1] data[cur]=temp[i1++]; 7N:,F9V<
else #-{4 Jx
data[cur]=temp[i2++]; h qxe
} t#d~gBe?V
} )UxF lp;\
oZIoY*7IrQ
} jKtbGVZ7r
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改进后的归并排序: 8'f:7KF
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package org.rut.util.algorithm.support; {? 6]_J
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import org.rut.util.algorithm.SortUtil; _kar5B$
-m-~
/** /|>z7#?m^
* @author treeroot ('>!dXA$
* @since 2006-2-2 <8'}H`w%
* @version 1.0 [rf.P'p%
*/ 'Yj/M
public class ImprovedMergeSort implements SortUtil.Sort { f):|Ad|
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private static final int THRESHOLD = 10; D VC};
a*o=,!
/* UD.$C
* (non-Javadoc) b2ZKhS8
* VRT| OUq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |J8c|h<
*/ 5I@< 6S&X
public void sort(int[] data) { vQ 5 p
int[] temp=new int[data.length]; 0Pbv7)=XL
mergeSort(data,temp,0,data.length-1); 2o6%P}C
} LB-4/G$
?a(ApD\
private void mergeSort(int[] data, int[] temp, int l, int r) { 4D0"Y#&G
int i, j, k; 9CxU:;3
int mid = (l + r) / 2; @UX'(W
if (l == r) -MeGJX:^I
return; {Z$Aw4a"d
if ((mid - l) >= THRESHOLD) dMYDB
mergeSort(data, temp, l, mid); -cOLgrmp
else A5z5e# ,u
insertSort(data, l, mid - l + 1); N U\B
if ((r - mid) > THRESHOLD) rZ *}jD[
mergeSort(data, temp, mid + 1, r); !hEtUF
else t}]=5)9<
insertSort(data, mid + 1, r - mid); 4s%vx]E
g&X$)V4C
for (i = l; i <= mid; i++) { >DPC}@Wl
temp = data; XZ}]H_, n
} +Y6=;*j$
for (j = 1; j <= r - mid; j++) { 3u_[=a
temp[r - j + 1] = data[j + mid]; 6gNsh
} Il,2^54q
int a = temp[l]; iJT_*,P^
int b = temp[r]; j0>Q:hn
for (i = l, j = r, k = l; k <= r; k++) { DFcgUEq
if (a < b) { UXvUU^k"v
data[k] = temp[i++]; VMZ\9IwI
a = temp; ,eW K~ pa
} else { lmfvT}$B
data[k] = temp[j--]; "@#^/m)
b = temp[j]; Et}S*!IS
} `8/K+e`
} 9'Le}`Gf
} W9+H/T7!
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/** ,( u-x!
* @param data I6S!-i
* @param l +`}QIp0
* @param i NO+.n)etGb
*/ JZ3CCf
private void insertSort(int[] data, int start, int len) { %-1-y]R|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); m:SG1m_6
} zk#"n&u0
} r~nD%H:}P
} `tw[{Wb
} B:J([@\'
V"K-aO&
堆排序： XYj!nx{k,
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package org.rut.util.algorithm.support; %Ya%R@b}
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import org.rut.util.algorithm.SortUtil; Ve)P/Zz}^
GJS3O;2*
/** D~P3~^
* @author treeroot hg4d]R,
* @since 2006-2-2 tpPP5C{
* @version 1.0 RUco3fZ
*/ zZp0g^;.?
public class HeapSort implements SortUtil.Sort{ Di)%vU
3b{ 7Z 2
/* (non-Javadoc) Sqn|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /<C}v~r
*/ ut j7"{'k|
public void sort(int[] data) { 1K{u>T
MaxHeap h=new MaxHeap(); 71b0MHNkvv
h.init(data); }$%j}F{
for(int i=0;i h.remove(); 3u[m? Vw
System.arraycopy(h.queue,1,data,0,data.length); X} {z7[
} e%[0 NVo
Q3"{v0
private static class MaxHeap{ b'r</ncZ
![3 /!
void init(int[] data){ ?qC6p|H
this.queue=new int[data.length+1]; 00SYNG!
for(int i=0;i queue[++size]=data; `)~]3zmG
fixUp(size); u:]c
} c~``)N
} $;iMo/
c!0u,6
private int size=0; Ms=5*_J2Jk
_ck)yY?7
private int[] queue; 11VtC)
`^v=*&
public int get() { S4 j5-
return queue[1]; Nwwn #+
} )fy-]Ky *
r{>`"
public void remove() { `uP:UQ9S
SortUtil.swap(queue,1,size--); =Gv*yR*]t
fixDown(1); ~%chF/H
} _"%hcCMw
file://fixdown d4~;!#<
private void fixDown(int k) { - f?8O6e
int j; XQ3"+M_KG
while ((j = k << 1) <= size) { ]J1oY]2~
if (j < size %26amp;%26amp; queue[j] j++; yopC <k
if (queue[k]>queue[j]) file://不用交换 5bB\i79$
break; &x9>8~
SortUtil.swap(queue,j,k); fV#,<JG
k = j; DHq#beN
} l*>,K2F
} 8KyRD1 (-R
private void fixUp(int k) { '\O[j*h^.
while (k > 1) { ]z#+3DaH
int j = k >> 1; w!dgIS$
if (queue[j]>queue[k]) ,xw1B-dx
break; _`I}"`2H
SortUtil.swap(queue,j,k); LD*XNcE
k = j; WKAG)4
} ;9CbioO
} a,|Hn
{j6$'v)0
} 3Ofh#|qc&
bey:Qj??
} %*zV&H
r.q*S4IS.m
SortUtil： Qz"+M+~%&
3D-0 N0o
package org.rut.util.algorithm; w/z o
\ 5.nr*5
import org.rut.util.algorithm.support.BubbleSort; pwH*&YU
import org.rut.util.algorithm.support.HeapSort; J!Q #xs
import org.rut.util.algorithm.support.ImprovedMergeSort; 9a2[_Wy
import org.rut.util.algorithm.support.ImprovedQuickSort; XJ!?>)N .
import org.rut.util.algorithm.support.InsertSort; )1f%kp#]
import org.rut.util.algorithm.support.MergeSort; ]]o?!NX
import org.rut.util.algorithm.support.QuickSort; Kf-XL),3l
import org.rut.util.algorithm.support.SelectionSort; o|$r;<o3R
import org.rut.util.algorithm.support.ShellSort; .p=OAh<
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/** |<Y~\|
* @author treeroot `_k_}9Fr
* @since 2006-2-2 %+htA0aX
* @version 1.0 KPVu-{_Fi
*/ 6FYL},.R
public class SortUtil { TMGYNb%<bX
public final static int INSERT = 1; RBz"1hRo`
public final static int BUBBLE = 2; <5E)6c_W)
public final static int SELECTION = 3; e*}*3kw)T
public final static int SHELL = 4; R$!]z(
public final static int QUICK = 5; ]4ck)zlv
public final static int IMPROVED_QUICK = 6; w~_ycY.e
public final static int MERGE = 7; *LMzq9n3o
public final static int IMPROVED_MERGE = 8; h<V,0sZ&:
public final static int HEAP = 9; ]- 6q`'?[
%"cOX
public static void sort(int[] data) { k')H5h+Q=
sort(data, IMPROVED_QUICK); [,MaAB
} YZ]}l%e
private static String[] name={ g&S>Wq%L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" LGw-cX #
}; H<}|n1w<
mzCd@<T,
private static Sort[] impl=new Sort[]{ );T&pm:C>
new InsertSort(), TMD\=8Na
new BubbleSort(), ,RDWx
new SelectionSort(), 9_?<T;]"
new ShellSort(), _M&n~ r
new QuickSort(), 7Vk9{x$z
new ImprovedQuickSort(), rizjH+
new MergeSort(), MQDLC7Y.p5
new ImprovedMergeSort(), 7O8 @T-f+2
new HeapSort() $}IG+,L
}; ju5o).!bg
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public static String toString(int algorithm){ _xH<R
return name[algorithm-1]; QOgGL1)7-
} r@zs4N0WP
H "Io!{aKU
public static void sort(int[] data, int algorithm) { \crh`~?>
impl[algorithm-1].sort(data); A9g/At_
} 33KCO
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public static interface Sort { !vSq?!y6*P
public void sort(int[] data); tAo$;|
} :{^~&jgL
dGj0;3FI%
public static void swap(int[] data, int i, int j) { ?hAO-*);
int temp = data; $9j>oUG
data = data[j]; FaWDAL=Vhk
data[j] = temp; |QF_E4ISD
} bI3GI:hp
} 3M(*q4A$"