[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; I^erMQn[ z
} Fm}#KE0
int i1=l; LV|ZZ.d h
int i2=mid+1; faQ}J%a
for(int cur=l;cur<=r;cur++){ qgREkb0
if(i1==mid+1) XFpII45
data[cur]=temp[i2++]; )yvI {
else if(i2>r) c'M#va
data[cur]=temp[i1++]; #x-@ >{1k&
else if(temp[i1] data[cur]=temp[i1++]; 1@Abs
else +vOlA#t%Z
data[cur]=temp[i2++]; w#]> Nf
} Hl`S\
} tPu0r],`o
sb"z=4
} So>P)d$8+
IvuKpX>*
改进后的归并排序: ny# ?^.1
} IJ
package org.rut.util.algorithm.support; 9))E\U
_BGw)Z 6
import org.rut.util.algorithm.SortUtil; 7)&}riQ
_'pow&w~
/** $="t7C9S
* @author treeroot 2R9AYI
* @since 2006-2-2 533n z8&9@
* @version 1.0 ~uqpF-.
*/ WAr;g?Q8
public class ImprovedMergeSort implements SortUtil.Sort { t^eWFX
"|P8L| @*
private static final int THRESHOLD = 10; irj{Or^k
g/Q"%GN,
/* B*=m%NXf
* (non-Javadoc) #[ZF'9x
* Ik[aiz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ay?KE{Qs '
*/ B \?We\y
public void sort(int[] data) { &o{=
int[] temp=new int[data.length]; ~*:{U
mergeSort(data,temp,0,data.length-1); -|E|-'
} 0($@9k4!/
!6y<jJ>
private void mergeSort(int[] data, int[] temp, int l, int r) { &!/E&e$_
int i, j, k; "rhU2jT=c
int mid = (l + r) / 2; A4;EtW+F
if (l == r) z&fXxp
return; qm RdO R
if ((mid - l) >= THRESHOLD) u!kC+0Y
mergeSort(data, temp, l, mid); :[icd2JCw]
else ,w>WuRN"
insertSort(data, l, mid - l + 1); mqw5\7s?
if ((r - mid) > THRESHOLD) hf5yTs
mergeSort(data, temp, mid + 1, r); 80qSPitj
else VVY#g%(K
insertSort(data, mid + 1, r - mid); n-X;JYQW
[C1.*Q+l
for (i = l; i <= mid; i++) { 2R}9wDP
temp = data; <{$0mUn;s|
} P#e1?
for (j = 1; j <= r - mid; j++) { M#<U=Ha
temp[r - j + 1] = data[j + mid]; <'s_3AC
} 8?p40x$m%
int a = temp[l]; "S8JHHx
int b = temp[r]; ,-!h
for (i = l, j = r, k = l; k <= r; k++) { yb 7
if (a < b) { &.dC%
data[k] = temp[i++]; y3!r;>2k=
a = temp; Fk&W*<}/;
} else { 5Q_T=TL
data[k] = temp[j--]; 4sU*UePr
b = temp[j]; j?!BHNs
} ~Sq!P
} :{#%_^}k
} \}CQo0v
|%wgux`z
/** lqD.epm
* @param data t9zPUR
* @param l f~U~f}Uw4
* @param i AH*{Bi[vX
*/ l,z# :k
private void insertSort(int[] data, int start, int len) { Xz/5Wis4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z^@.b
} IZr~h9
} [VvTR#^
} 7d9kr?3(U
} &G#LQl
3Z,J&d`[
堆排序： W6N3u7mrb
'.Ww*N
package org.rut.util.algorithm.support; aQ@9(j> F
l/=2P_8+Z
import org.rut.util.algorithm.SortUtil; x2-i1#j`;
G8]DK3#
/** j$2rU'
* @author treeroot cJ CKxj
* @since 2006-2-2 +ZuT\P&kR5
* @version 1.0 I+qg'mo
*/ :0G_n\
public class HeapSort implements SortUtil.Sort{ u\L=nCtLby
4!%@{H`3
/* (non-Javadoc) yr4j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g43j-[j)
*/ ,tt .oF|
public void sort(int[] data) { 5m.{ayE
MaxHeap h=new MaxHeap(); N^G $:GC
h.init(data); _(#HQd,i
for(int i=0;i h.remove(); <K^{36h
System.arraycopy(h.queue,1,data,0,data.length); HC%tJ:G
} ll]MBq
KKrLF?rc
private static class MaxHeap{ Z%h _g-C
[ " n+2;
void init(int[] data){ +[LG>
this.queue=new int[data.length+1]; U;o$=,_p
for(int i=0;i queue[++size]=data; bn$('
fixUp(size); z%lu%
} 'hEvW
} [r[IWy(}
.f1
private int size=0; }OQaQf9V{
U9?fUS
private int[] queue; % oPt],>
{P'_s]B)
public int get() { 5y 9(<}z
return queue[1]; A*1-2
} /G{;?R
{B!LhvYAH
public void remove() { H@+1I?l
SortUtil.swap(queue,1,size--); *En29N#a{
fixDown(1); 7H$I9e
} [uJfmrEH
file://fixdown 6MewQ{hi
private void fixDown(int k) { fGeDygV^`
int j; y4@zi"G
while ((j = k << 1) <= size) { E{LLxGAEZ
if (j < size %26amp;%26amp; queue[j] j++; oFO)28Btv
if (queue[k]>queue[j]) file://不用交换 r JvtE}x1
break; \wJ2>Q
SortUtil.swap(queue,j,k); iMT[sb
k = j; Yk;-]qi7
} )bd)noZi
} R6(sWN-
private void fixUp(int k) { \ F\ /<
while (k > 1) { &:>3tFQSH
int j = k >> 1; O c[F
if (queue[j]>queue[k]) Nldy76|g
break; D(E3{\*R
SortUtil.swap(queue,j,k); Ipp#{'Do
k = j; {^5LolCCH
} $wr B5m?
} 6#J>b[Q
6-fdfU
} Rudj"OGO
>3C4S
} %Tv2op
46^9O 5J
SortUtil： vvTQ!Aa
|Ix{JP"Lk
package org.rut.util.algorithm; '%H\k5^
g3Xab
import org.rut.util.algorithm.support.BubbleSort; 3)6TnY/u6{
import org.rut.util.algorithm.support.HeapSort; 9a6ij*#
import org.rut.util.algorithm.support.ImprovedMergeSort; ?W3l
import org.rut.util.algorithm.support.ImprovedQuickSort; h7P<3m}
import org.rut.util.algorithm.support.InsertSort; !y$:}W?_
import org.rut.util.algorithm.support.MergeSort; TQ,KPf$0U
import org.rut.util.algorithm.support.QuickSort; <hV%OrBz-
import org.rut.util.algorithm.support.SelectionSort; mA?fCs
import org.rut.util.algorithm.support.ShellSort; l%_r3W
; u@& [
/** *QGyF`Go{
* @author treeroot R<L<kChg
* @since 2006-2-2 x 8/I"!gI
* @version 1.0 LmZ"_
*/ 0|}]=XN^
public class SortUtil { "c5bz
public final static int INSERT = 1; 61@;3yV
public final static int BUBBLE = 2; pBxyq"z
public final static int SELECTION = 3; W5^<4Ya!
public final static int SHELL = 4; iW9o-W a
public final static int QUICK = 5; fvi8+3A&
public final static int IMPROVED_QUICK = 6; 4lF(..Ix
public final static int MERGE = 7; rqi/nW
public final static int IMPROVED_MERGE = 8; FK+`K<
public final static int HEAP = 9; s=H|^v
8#{DBWU
public static void sort(int[] data) { _C%:AFPP>
sort(data, IMPROVED_QUICK); Xl %ax!/
} ?'IY0^
private static String[] name={ Tb[1\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z[sP/{~z
}; k9_c<TSzu
Ncr*F^J4
private static Sort[] impl=new Sort[]{ lDX\"Fq
new InsertSort(), _/5#A+ ?
new BubbleSort(), SjL&\),
new SelectionSort(), ?/1Eu47
new ShellSort(), 1PUeU+
new QuickSort(), *DcB?8%
new ImprovedQuickSort(), KNG7$icG
new MergeSort(), M(Tlkr
new ImprovedMergeSort(), 61~7 L^882
new HeapSort() Fd;%wWY.zm
}; ]ft}fU5C1
_*.ImD
public static String toString(int algorithm){ )gHfbUYS
return name[algorithm-1]; )?MUUI:
} NiSH$MJ_
[vTk*#Cl4
public static void sort(int[] data, int algorithm) { ~wFiq)v(
impl[algorithm-1].sort(data); 7t3ps
} DLH|y%"
EXEB A&*
public static interface Sort { 4de:hE
public void sort(int[] data); !Z!X]F-fY
} j[${h,p?
KQTv5|$?
public static void swap(int[] data, int i, int j) { mXOY,g2w
int temp = data; U}R(
data = data[j]; ( u^`3=%n
data[j] = temp; x~u"KU2B
} ^N&@7s
} X]4j&QB