[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; bV ZMW/w
} zN [2YJ$
int i1=l; eImn+_ N3
int i2=mid+1; 0v9rv.Y"
for(int cur=l;cur<=r;cur++){ Iu$K i
if(i1==mid+1) lP<:tR~K
data[cur]=temp[i2++]; '` pDngX
else if(i2>r) <~ Sz04
data[cur]=temp[i1++]; 7)s^8+
else if(temp[i1] data[cur]=temp[i1++]; "~D]E7Q3y
else E9;|'Vy<E
data[cur]=temp[i2++]; (\SA*.)
} _q~=~nub
} tKpmm`2
,?L2wl[
} O%FPS=
r/SG 4
改进后的归并排序: x g0iN'e'K
V7/I>^X
package org.rut.util.algorithm.support; }Hn/I,/
~R(%D-k
import org.rut.util.algorithm.SortUtil; )E~79!
>%wLAS",w
/** tg{H9tU;
* @author treeroot )oyIe)
* @since 2006-2-2 *8LMn
* @version 1.0 7}X[ 4("bB
*/ 3D2E?$dX
public class ImprovedMergeSort implements SortUtil.Sort { Rz.?i+
() j=5KDu
private static final int THRESHOLD = 10; )kP5u`v
'_V2!?+RU+
/* t^w"w`v\u
* (non-Javadoc) ;UxP Kpl
* B'fb^n<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }K&7%N4LZ
*/ ?]*^xL;x?
public void sort(int[] data) { VY3&
int[] temp=new int[data.length]; -]QD|w3dp
mergeSort(data,temp,0,data.length-1); ^/r7@:
} m@^1JlH
>(;{C<6|^
private void mergeSort(int[] data, int[] temp, int l, int r) { /oriW;OF
int i, j, k; 8?%-'z.
int mid = (l + r) / 2; dxmE3*b`
if (l == r) ^Y'HaneoM
return; _]Zs,Hy
if ((mid - l) >= THRESHOLD) R00eisd
mergeSort(data, temp, l, mid); ?:)]h c
else +u3=dj"[
insertSort(data, l, mid - l + 1); PS[+~>%
if ((r - mid) > THRESHOLD) S;)w.
mergeSort(data, temp, mid + 1, r); -q*i_r:,
else \ioH\9
insertSort(data, mid + 1, r - mid); 9o+)?1\
4y+< dw
for (i = l; i <= mid; i++) { `5C,N!d8X
temp = data; og kD^
} svq<)hAf<
for (j = 1; j <= r - mid; j++) { TTKs3iTXz
temp[r - j + 1] = data[j + mid]; PF53mUs4
} ?nmn1`UT
int a = temp[l]; pim!.=vN/U
int b = temp[r]; 3J5!oF{H
for (i = l, j = r, k = l; k <= r; k++) { x= 5N3[5
if (a < b) { vMm1Z5S/
data[k] = temp[i++]; K|Di1)7=/
a = temp; F 9@h|#an
} else { /@,j232
data[k] = temp[j--]; ]4pkcV P
b = temp[j]; aL&n[
} o:_Xv.HRZo
} W`u[h0\c
} fyByz=pl
P3=W|81e
/** ,=#F//
* @param data BYMi6wts
* @param l o<|P9#(U"
* @param i m+Rv+_R
*/ <x<"n t
private void insertSort(int[] data, int start, int len) { 6e[VgN-s
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); e8GEoD
} tV{4"Ij9[
} rl#p".4q
} l\@)y4 +
} ::}{_ Z
s;6CExH
堆排序： * /:x sI
lp(8E6
package org.rut.util.algorithm.support; Ro9tZ'N!S
|\7 ET[Xq
import org.rut.util.algorithm.SortUtil; :>Ay^{vf=
L2[f]J%
/** %@6}GmK^
* @author treeroot }n4V|f-
* @since 2006-2-2 #~<0t(3Q
* @version 1.0 #g]vc_V
*/ `0Oh_8"
public class HeapSort implements SortUtil.Sort{ "$2y-|
n:{qC{D-qS
/* (non-Javadoc) r(RKwr:m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6I4oi@hZz
*/ '2[albxSc
public void sort(int[] data) { O4og?h>
MaxHeap h=new MaxHeap(); y9>ZwYN
h.init(data); R5X.^u
for(int i=0;i h.remove(); BEre*J
System.arraycopy(h.queue,1,data,0,data.length); !Ikt '5/
} ]%IT|/;9Y
(adyZ/j
private static class MaxHeap{ _N{RVeO
sXD1C2o
void init(int[] data){ f)^_|8
this.queue=new int[data.length+1]; Ht&:-F+dm
for(int i=0;i queue[++size]=data; IrqZi1
fixUp(size); '.81zpff
} ]Ccg`AR{
} $h*L=t(
\cUC9/ b
private int size=0; VB,?Mo}R
4}eepJOn
private int[] queue; qa0 yg8,<
id2j7|$,
public int get() { F7O(Cy"1
return queue[1]; i5CK*"$Q
} CTZh0x
U qFv}VsnF
public void remove() { "saUai4z
SortUtil.swap(queue,1,size--); \xnWciQ#{
fixDown(1); RM!<8fXYD
} 4<lRPsvgc
file://fixdown LQngK7>
private void fixDown(int k) { !g(KK|`,m
int j; 98uV6b~g
while ((j = k << 1) <= size) { \kU &^Hi
if (j < size %26amp;%26amp; queue[j] j++; n8".XS
if (queue[k]>queue[j]) file://不用交换 >VN5`Zlw\C
break; '>' wK.
SortUtil.swap(queue,j,k); 5sx1Zq7
k = j; vM*($qpAy
} q@nP}Pv&5
} ~e+\k>^eN
private void fixUp(int k) { >U]C/P[+
while (k > 1) { :uK?4
int j = k >> 1; ecCr6)
if (queue[j]>queue[k]) enSXP~9w
break; %\H|B0
SortUtil.swap(queue,j,k); w(/aiV
k = j; Q2F+?w;,
} H\:lxR^
} RHO(?8"_
K%F,='P}
} xK6n0] A
JSTuXW
} uoX:^'q
\8?Tdx=
SortUtil： Z`KC%!8K
c%'RR?Tl
package org.rut.util.algorithm; %|oJ>+
&'}RrW-s
import org.rut.util.algorithm.support.BubbleSort; 17G'jiYH
import org.rut.util.algorithm.support.HeapSort; TTt#a6eJ
import org.rut.util.algorithm.support.ImprovedMergeSort; *22nVKi{
import org.rut.util.algorithm.support.ImprovedQuickSort; hR Ue<0o:
import org.rut.util.algorithm.support.InsertSort; NT+?#0I
import org.rut.util.algorithm.support.MergeSort; Z^IPZF
import org.rut.util.algorithm.support.QuickSort; #>mr[
import org.rut.util.algorithm.support.SelectionSort; Qg[/%$x.
import org.rut.util.algorithm.support.ShellSort; bS"fkf9
Htgx`N|
/** 2VE9}%i
* @author treeroot G %Q^o5m
* @since 2006-2-2 ~nG(5:A5g/
* @version 1.0 +E.GLn2/
*/ <oX7P69
public class SortUtil { !WpBfd>v.I
public final static int INSERT = 1; h >s!K9
public final static int BUBBLE = 2; BC&9fr
public final static int SELECTION = 3; !`M|C?b
public final static int SHELL = 4; ` M3w]qJ<}
public final static int QUICK = 5; zN:K%AiGxe
public final static int IMPROVED_QUICK = 6; f^"N!f a
public final static int MERGE = 7; LkK~%tY
public final static int IMPROVED_MERGE = 8; @)4]b+8Z
public final static int HEAP = 9; #~l(]h@ )
<F=xtyl7
public static void sort(int[] data) { H s"HID
sort(data, IMPROVED_QUICK); <c,u3cp
} X7i/fm{l'
private static String[] name={ 371 TvZ4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HO}Hh[{V9
}; 2g>SHS@1>
/(BMG/Tb
private static Sort[] impl=new Sort[]{ q~vDz]\G
new InsertSort(), nC}6B).el
new BubbleSort(), rjPL+T_
new SelectionSort(), j(k: @
new ShellSort(), 70;Jl).\{
new QuickSort(), [.S#rGYk
new ImprovedQuickSort(), S4h:|jLUF
new MergeSort(), *?Kr*]dnLl
new ImprovedMergeSort(), :C65-[PSdO
new HeapSort() A0q|J/T
}; `P3>S(Tgy
Qe5U<3{JZ
public static String toString(int algorithm){ j"|=C$Kn/
return name[algorithm-1]; !/3B3cG
} !cAyTl(_
\&iP`v`K
public static void sort(int[] data, int algorithm) { D0#x Lh
impl[algorithm-1].sort(data); PUBWZ^63
} -!N&OZ+R
0Emr<n
public static interface Sort { q"<acqK
public void sort(int[] data); (Xq)py9
} )Ib<F7v
*i- _6s
public static void swap(int[] data, int i, int j) { 43Qtj$F
int temp = data; KB'qRnkc
data = data[j]; sh`s/JRf
data[j] = temp; @g$Gti
} C~N/A73gF
} zOqn<Y@