[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; CF:s@Z+
} |4@su"OA
int i1=l; c)tG1|Og]
int i2=mid+1; voHFU#Z$
for(int cur=l;cur<=r;cur++){ WTcrfs)T
if(i1==mid+1) hvS4"%\
data[cur]=temp[i2++]; f2y:K6$'l*
else if(i2>r) xC,;IS k,
data[cur]=temp[i1++]; d;$<K
else if(temp[i1] data[cur]=temp[i1++]; 9a*}&fL[
else TEK]$%2
data[cur]=temp[i2++]; dlx"L%
} UpU2H4
} R}-<ZJe
+W6QtB6
} 0Lo)Ni^"
;x=kJ@
改进后的归并排序: TvzqJ=
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package org.rut.util.algorithm.support; VHlN;6Qlff
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import org.rut.util.algorithm.SortUtil; n!B*n(;!u
cN5,\I.
/** 9y~5@/32R
* @author treeroot nKzS2u=:Y
* @since 2006-2-2 @,Iyn<v{B
* @version 1.0 `bJ+r)+5
*/ & bwhD.:=
public class ImprovedMergeSort implements SortUtil.Sort { ; SS/bS|
#0WGSIht<
private static final int THRESHOLD = 10; Jmp%%^
/*+P}__k
/* {Di()]/
* (non-Javadoc) : ;nvqbd
* H7xyK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $#k8xb
*/ ]d}U68$T+
public void sort(int[] data) { %`cP|k
int[] temp=new int[data.length]; B3lP#ckh
mergeSort(data,temp,0,data.length-1); m;S!E-W
} avb'J^}f
OUd&fUmH
private void mergeSort(int[] data, int[] temp, int l, int r) { ?4kM5NtP
int i, j, k; l1&NU'WW
int mid = (l + r) / 2; ;w/|5 ;{A;
if (l == r) NT^m.o~4
return; LB1AjNJ
if ((mid - l) >= THRESHOLD) YQ&Ww|xe
mergeSort(data, temp, l, mid); ya<nD'%9
else z)RJUmY3B
insertSort(data, l, mid - l + 1); JFyw,p&xB
if ((r - mid) > THRESHOLD) {*Ag[HS0u
mergeSort(data, temp, mid + 1, r); VuOZZ7y
else CBqeO@M
insertSort(data, mid + 1, r - mid); _%xe:X+ M
^4WNP
for (i = l; i <= mid; i++) { {!lC$SlJ
temp = data; zJH#J=O
} B~[QmK
for (j = 1; j <= r - mid; j++) { ]Cfjs33H
temp[r - j + 1] = data[j + mid]; OM]d}}=Y
} s7A3CY]->
int a = temp[l]; <Be:fnPX7
int b = temp[r]; (V:z7
for (i = l, j = r, k = l; k <= r; k++) { =V- ^
if (a < b) { < )dqv0=
data[k] = temp[i++]; J-6l<%962%
a = temp; *?2aIz"
} else { 'S_OOzpC
data[k] = temp[j--]; ps DY}y\"
b = temp[j]; 8QYP\7}o
} 3y[6n$U&
} S~~G0GiW
} "~1{|lj|)
Y ,Iv<Hg
/** \F$Vm'f_
* @param data [9wuaw"~[Z
* @param l B<99-7x3
* @param i kq{PM-]l
*/ ")'9:c
private void insertSort(int[] data, int start, int len) { X=8CZq4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !CBvFl/v
} D%=VhKq
} B_gzpS]
} kqebU!0-
} lUL6L4m
mW/6FC
堆排序： [MQU~+]
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package org.rut.util.algorithm.support; V<:)bG4;d
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import org.rut.util.algorithm.SortUtil; St1Ny,$yU
V0rS^SAF
/** SBf8Ipe
* @author treeroot 9!``~]G2
* @since 2006-2-2 _~l*p"PL<
* @version 1.0 n=z=%T6
*/ Ft<6`C
public class HeapSort implements SortUtil.Sort{ %4=r .9
U<YP@?w
/* (non-Javadoc) \aEarIX#*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n A<#A
*/ F}f/cG<X
public void sort(int[] data) { c'wxCqnE
MaxHeap h=new MaxHeap(); Y<]A5cm
h.init(data); w$aiVOjgT
for(int i=0;i h.remove(); 8h.Dc&V
System.arraycopy(h.queue,1,data,0,data.length); ^$N}[1
} U,tl)(!@Q-
W Ai91K@
private static class MaxHeap{ d)R7#HLZ7
CeZ+!-lG
void init(int[] data){ /8Sr(
this.queue=new int[data.length+1]; G1=/G
for(int i=0;i queue[++size]=data; ul-A'
fixUp(size); |7pi9
} w1Xe9'$Qb
} wNfWHaH" m
+ a,x
private int size=0; }akF=/M
aqw;T\GI+~
private int[] queue; )S8fFV
F>H5 ww9E
public int get() { 9'My/A0
return queue[1]; g'%^-S ]
} RT`jWWh*Lo
DjMhI_Yu
public void remove() { ]c+HD*
SortUtil.swap(queue,1,size--); z#( `H6n:
fixDown(1); J)o =0i>*
} <`f~Z|/-_(
file://fixdown f\|R<3 L
private void fixDown(int k) { F?!X<N{
int j; 1.U9EuI
while ((j = k << 1) <= size) { J"$Y`;
if (j < size %26amp;%26amp; queue[j] j++; x1O]@Z{d\
if (queue[k]>queue[j]) file://不用交换 M[= #%U3*N
break; !eC]=PoY
SortUtil.swap(queue,j,k); +kj d;u#
k = j; ?a]1$>r
} OgOs9=cE{
} k-;A9!^h
private void fixUp(int k) { f]*TIYicc
while (k > 1) { eyIbjgpV
int j = k >> 1; PCcI(b>?l
if (queue[j]>queue[k]) Lj,!025
break; |4_[wX r
SortUtil.swap(queue,j,k); h{Zd, 9H
k = j; ssx#\
} 0sR+@\
} |EjMpRNE
ar%!h~
} 2," (
p%]ZG,
} Jg2*$gL;_
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SortUtil： UWPzRk#s"
l2S1?*
package org.rut.util.algorithm; 3c|u2Pl
m35$4
import org.rut.util.algorithm.support.BubbleSort; Q2 S!}A
import org.rut.util.algorithm.support.HeapSort; ?kBX:(g
import org.rut.util.algorithm.support.ImprovedMergeSort; B=;pwX
import org.rut.util.algorithm.support.ImprovedQuickSort; 7xlarns
import org.rut.util.algorithm.support.InsertSort; +FGw)>g8'm
import org.rut.util.algorithm.support.MergeSort; 5/f"dX
import org.rut.util.algorithm.support.QuickSort; gNj~o^6|@
import org.rut.util.algorithm.support.SelectionSort; <`P7^ 'z!
import org.rut.util.algorithm.support.ShellSort; 1oSU>I_i
VS\+"TPuH
/** l.Yq4qW
* @author treeroot C"[d bh!
* @since 2006-2-2 Es^=&2''
* @version 1.0 Q\qI+F2?
*/ {*NM~yQ
public class SortUtil { upc-Qvk
public final static int INSERT = 1; #FwTV@
public final static int BUBBLE = 2; Lt?k$U{qe)
public final static int SELECTION = 3; $psPNJG
public final static int SHELL = 4; [a2Q ^ab
public final static int QUICK = 5; r1R\cor
public final static int IMPROVED_QUICK = 6; #sJL"GB
public final static int MERGE = 7; l(j._j~p
public final static int IMPROVED_MERGE = 8; c_Fz?R+f?K
public final static int HEAP = 9; 'X(Sn3
)N}.n2Y8W
public static void sort(int[] data) { enB2-)<K
sort(data, IMPROVED_QUICK); 0V!@*Z
} 1m\ihU
private static String[] name={ L_(Y[!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /@xL {
}; .{t]Mc
'1NZSiv+C?
private static Sort[] impl=new Sort[]{ {@*l,[,5-
new InsertSort(), tg#d.(
new BubbleSort(), Y3M"a8e'
new SelectionSort(), 8v12<ktR`
new ShellSort(), $?M$^-(e
new QuickSort(), *3s,~<''%
new ImprovedQuickSort(), #P/}'rdt
new MergeSort(), qQ^bUpk0
new ImprovedMergeSort(), FS^ie|8{D-
new HeapSort() )>+J`NFa
}; _Y8RP%
{u@w^ hZ$
public static String toString(int algorithm){ O[|prk,
return name[algorithm-1]; j#D( </T
} .'Rz tBv
v_L?n7c
public static void sort(int[] data, int algorithm) { 'ngx\Lr
impl[algorithm-1].sort(data); 7a5G,C#QQ
} U!D\Vd
!`qw"i
public static interface Sort { >@+ r|
public void sort(int[] data); {+@M!
} I>n2# -8
D]B;5f
public static void swap(int[] data, int i, int j) { a&)4Dv0
int temp = data; -l i71.M
data = data[j]; j"wbq-n,7
data[j] = temp; 5lYzgt-oP
} I?#B_R#
} F2WMts