[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; yc|j]?
} OKDBzl
int i1=l; FcR(uv<
int i2=mid+1; P\"|b\O1
for(int cur=l;cur<=r;cur++){ RS`]>K3t
if(i1==mid+1) &?.k-:iN
data[cur]=temp[i2++]; -C9_gZ
else if(i2>r) vo'=d"zm
data[cur]=temp[i1++]; 6>I{Ik@>
else if(temp[i1] data[cur]=temp[i1++]; D@[Mk"f
else U p1&(
data[cur]=temp[i2++]; .gPE Qc+D
} O0?.$f9 s
} 6#NptXB
9v7l@2/
} &_Py{Cv@Dw
XY(3!>/eQ[
改进后的归并排序: fV[(s7vW
:*GLLjS;
package org.rut.util.algorithm.support; R#ayN*
sP1wO4M?{
import org.rut.util.algorithm.SortUtil; x"kc:F
E\U6n""]
/** >Le L%$
* @author treeroot 0Xmp)_vba
* @since 2006-2-2 *&VH!K#@{
* @version 1.0 Wb!"L`m
*/ &Nx'Nq9y
public class ImprovedMergeSort implements SortUtil.Sort { PCl@Ff
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private static final int THRESHOLD = 10; LqnN5l@_B
B~HA 32
/* #*^vd{fl
* (non-Javadoc) }kg?A oo
* VV/6~jy0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lWj|7
*/ Rpit>
public void sort(int[] data) { -!E))|A
int[] temp=new int[data.length]; nZ?BCO
mergeSort(data,temp,0,data.length-1); r3X|*/
} _%G)Uz{3
>t2E034_
private void mergeSort(int[] data, int[] temp, int l, int r) { %-? :'F!1
int i, j, k; )zK`*Fa az
int mid = (l + r) / 2; G{*m] 0Q
if (l == r) 7_r$zEP6
return; 4&r+K`C0
if ((mid - l) >= THRESHOLD) 4am`X1YV#
mergeSort(data, temp, l, mid); I8r5u=PH
else &IGTCTBP
insertSort(data, l, mid - l + 1); ODn6%fp%
if ((r - mid) > THRESHOLD) i3I'n*
mergeSort(data, temp, mid + 1, r); G%N/]]ll
else (fON\)l
insertSort(data, mid + 1, r - mid); X+;F5b9z
'LZF^m _<<
for (i = l; i <= mid; i++) { q1j<p)(
temp = data; {~DYf*RZ
} $Xf1|!W%a%
for (j = 1; j <= r - mid; j++) { 5p6Kq=jhb
temp[r - j + 1] = data[j + mid]; H!U\;ny
} D8P<mIu}Y
int a = temp[l]; 1aKYxjYM
int b = temp[r]; uN bOtA
for (i = l, j = r, k = l; k <= r; k++) { X%W_cb2
if (a < b) { M0`nr}g
data[k] = temp[i++]; 1Sox@Ko
a = temp; &Im{p7gf!b
} else { )e.Y"5My
data[k] = temp[j--]; 6'y+Ev$9
b = temp[j]; LO@.aJpp
} 9"_JiX~3
} I}/o`oc
} %+oWW5q7
?(GMe>
/** [\CQ_qs|
* @param data Z qX U
* @param l 7|3Qcn7P)@
* @param i sZFIQ)b9
*/ vlCjh! x
private void insertSort(int[] data, int start, int len) { \a+F/I$hwa
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <mlQn?u
} !*\)7D
} 2<}^m/}
} LXj2gsURu%
} TkhbnO g6
9 O| "Ws>{
堆排序： 4s/4z@3a
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package org.rut.util.algorithm.support; 6'W79
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import org.rut.util.algorithm.SortUtil; KquHc-fzqr
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/** ,p\^n`A32
* @author treeroot i'J.c4
* @since 2006-2-2 Nj||^k
* @version 1.0 XOzPi*V**
*/ yrO'15TB
public class HeapSort implements SortUtil.Sort{ k:PO"<-U
zR h1
/* (non-Javadoc) BDZB;DPb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PCnE-$QH
*/ %j=dKd>
public void sort(int[] data) { I=l() ET=
MaxHeap h=new MaxHeap(); +B^/ =3P
h.init(data); fI[tU(x
for(int i=0;i h.remove(); Yo;/7gG>
System.arraycopy(h.queue,1,data,0,data.length); CJg &
} O_0|Q@
:gDIGBK,
private static class MaxHeap{ r<V]MwO=
uSbOGhP
void init(int[] data){ 7{f&L'
this.queue=new int[data.length+1]; @/H1}pM~
for(int i=0;i queue[++size]=data; M_+&XLnzsJ
fixUp(size); B1c`(mHl
} \c>9f"jS_
} LtbL[z>]
)u]J`.OA
private int size=0; Xhtc0\0"(
tY !fO>Fn~
private int[] queue; ZT4._|2
<(`dU&&%"}
public int get() { Mcc774'*9
return queue[1]; nH}api^0A
} "RuJlp
A?|KA<&m#u
public void remove() { l"o@.C}f/
SortUtil.swap(queue,1,size--); "5Oog<
fixDown(1); ]Rohf WHX
} <M nzR
file://fixdown mm/U9hbp%
private void fixDown(int k) { ~6.AE/ow
int j; ~!meO;|W
while ((j = k << 1) <= size) { *!%y.$\cE
if (j < size %26amp;%26amp; queue[j] j++; B<DvH"+$
if (queue[k]>queue[j]) file://不用交换 P~redX=t@
break; 'cy35M
SortUtil.swap(queue,j,k); 'IP'g,o++
k = j; }|H]>U&
} ps"crV-W
} bBAZr`<&U
private void fixUp(int k) { $5r[YdnY<
while (k > 1) { VF!?B>
int j = k >> 1; S0/@y'q3en
if (queue[j]>queue[k]) wX8T;bo&
break; f"xi7vJv!f
SortUtil.swap(queue,j,k); X3(:)zUL
k = j; y`:}~nUdT
} 8NudY3cU!
} P[n`X
[|d:QFx
} v~q2D"
]p(+m_F
} Nz#T)MGO`
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SortUtil： \:8~na+(
k^J~l=?v
package org.rut.util.algorithm; Zq2dCp%
z!)_'A
import org.rut.util.algorithm.support.BubbleSort; Ul^/Dh
import org.rut.util.algorithm.support.HeapSort; qCSJ=T;
import org.rut.util.algorithm.support.ImprovedMergeSort; "@Bc eD
import org.rut.util.algorithm.support.ImprovedQuickSort; { >{|3
import org.rut.util.algorithm.support.InsertSort; l?NRQTG
import org.rut.util.algorithm.support.MergeSort; v#a`*^ ^
import org.rut.util.algorithm.support.QuickSort; WSn^P~vC
import org.rut.util.algorithm.support.SelectionSort; Z8(1QU,~2
import org.rut.util.algorithm.support.ShellSort; }Ga@bY6
dI5Z*"`R9
/** ,]i ^/fT
* @author treeroot UA!h[+Z
* @since 2006-2-2 9b@L^]Kg
* @version 1.0 O}MY:6Pe
*/ <wFR%Y/j
public class SortUtil { a~Sf~ka
public final static int INSERT = 1; Op,Ce4A
public final static int BUBBLE = 2; "V&2g?
public final static int SELECTION = 3; 1HskY| X
public final static int SHELL = 4; ro6|N?'
public final static int QUICK = 5; +)^F9LPl
public final static int IMPROVED_QUICK = 6; ]3 YJEP
public final static int MERGE = 7; k.rP}76
public final static int IMPROVED_MERGE = 8; H?sl_3-#
public final static int HEAP = 9; ta> g:
H4Ca+;
public static void sort(int[] data) { MxuwEV|^
sort(data, IMPROVED_QUICK); 02Ur'|
} A-~#ydv
private static String[] name={ `~WxMY0M
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v!E0/ gD
}; 9qIUBHe
8X!UtHml
private static Sort[] impl=new Sort[]{ FAjO-T4(
new InsertSort(), VQZ3&]o
new BubbleSort(), "FT5]h
new SelectionSort(), Cfyas'
new ShellSort(), )-Zpr1kD
new QuickSort(), D%LqLLD
new ImprovedQuickSort(), Gnj;=f
new MergeSort(), rFM`ne<zh
new ImprovedMergeSort(), *qAF#
new HeapSort() ?g}n$%*5y!
}; #E2`KGCzW
GD}3r:wDs
public static String toString(int algorithm){ *;7&
return name[algorithm-1]; 7OS\j>hb~
} Q nDymVF
S6$S%$
public static void sort(int[] data, int algorithm) { ndOPD]A'
impl[algorithm-1].sort(data); m`g%\o^6i
} 0'TqW9P
mbsdiab#N
public static interface Sort { T73oW/.0X?
public void sort(int[] data); v>c[wg9P
} vYL{5,t {1
b)en/mz
public static void swap(int[] data, int i, int j) { )*G3q/l1u6
int temp = data; %aaOws
data = data[j]; '<!/\Jz9l
data[j] = temp; YZ7rs]A
} tRS^|??
} H'<9;bD -