[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; '";#v.!
} ?).;cG:<
int i1=l; n!4\w>h
int i2=mid+1; yf9"Rc~+
for(int cur=l;cur<=r;cur++){ z )'9[t
if(i1==mid+1) h40;Q<D
data[cur]=temp[i2++]; ##6\~!P
else if(i2>r) .p! DVQ"a
data[cur]=temp[i1++]; YK)m6zW5
else if(temp[i1] data[cur]=temp[i1++]; gMI%!Y
else }yK7LooM
data[cur]=temp[i2++]; x6`mv8~9Db
} HP.=6bJWi
} R>O_2`c
It[51NMal
} c'i5,\#X
gSwV:hm
改进后的归并排序: fgd2jr3T
x|a&wC2,{
package org.rut.util.algorithm.support; iT :3e%
Ob/)f)!!
import org.rut.util.algorithm.SortUtil; y017 B<Ou
:oZ<[#p"*
/** 9s^$tgH
* @author treeroot :awkhx
* @since 2006-2-2 OP1`!P y
* @version 1.0 SvM\9
*/ qUd7O](b=?
public class ImprovedMergeSort implements SortUtil.Sort { AB'+6QU9k
!^%3
private static final int THRESHOLD = 10; FB[b]+t`D{
LG&BWs!
/* D6Ad"|Z
* (non-Javadoc) )k=KLQ\b
* :')[pO_FW*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]gq)%T]
*/ Lto*L X
public void sort(int[] data) { &#2&V>pE
int[] temp=new int[data.length]; fB3Jp~$
mergeSort(data,temp,0,data.length-1); pq{`WgA^
} "@&TC"YG0
ekhv.;N~
private void mergeSort(int[] data, int[] temp, int l, int r) { hN2A%ds*(j
int i, j, k; A4tk</A
int mid = (l + r) / 2; pX_#Y)5
if (l == r) _p*9LsN$L
return; tVRN3fJH
if ((mid - l) >= THRESHOLD) S[F06.(1
mergeSort(data, temp, l, mid); -'$ob~*
else :/T\E\Qr
insertSort(data, l, mid - l + 1); 8 ??-H0P
if ((r - mid) > THRESHOLD) a&_h(
mergeSort(data, temp, mid + 1, r); vN{@c(=g
else '0D$C},^|8
insertSort(data, mid + 1, r - mid); xG/Q%A
J{ju3jo
for (i = l; i <= mid; i++) { 4f\NtQ)
temp = data; 5*%Gh&)
} m8fj\,X
for (j = 1; j <= r - mid; j++) { g,+e3f
temp[r - j + 1] = data[j + mid]; X`D2w:
} h-P|O6@Ki
int a = temp[l]; |'?vlUCd
int b = temp[r]; `NW/Z/_
for (i = l, j = r, k = l; k <= r; k++) { Vu5?;|^:
if (a < b) { :oIBJ u%/
data[k] = temp[i++]; %)lp]Y33
a = temp; 3IMvtg
} else { [ \_o_W
data[k] = temp[j--]; :.x(( FU
b = temp[j]; "|8oFf)l@B
} @)U.Dbm
} U>PZ3
} kG>jb!e@(
;MS.ag#
/** ZQfxlzj+X
* @param data @N Yl4N
* @param l \(Sly&gL
* @param i ^>IP"kF
*/ {fXkbMO|
private void insertSort(int[] data, int start, int len) { Nj>6TD81u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (TT=i
} 6|jZv~rS$
} 2`f{D~w
} w<9rTHG8,
} h]oUY.Pf
*?X&Y8Kf
堆排序： u<S`"MR:J
#%E`~&[
package org.rut.util.algorithm.support; K{P-+(
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import org.rut.util.algorithm.SortUtil; #kC~qux^
4eHSAN"$
/** ,sL'T[tuiU
* @author treeroot Z Ts*Y,
* @since 2006-2-2 ETHcZ
* @version 1.0 z&%i"IY
*/ m# {'9 |
public class HeapSort implements SortUtil.Sort{ '8q3ub<\
z0 9Gp}^;
/* (non-Javadoc) "h+Z[h6T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &O'W+4FAc
*/ :'p)xw4K|
public void sort(int[] data) { +dCDk* /m
MaxHeap h=new MaxHeap(); 0/Q_% :
h.init(data); \jC) ;mk
for(int i=0;i h.remove(); 9lYKG^#D
System.arraycopy(h.queue,1,data,0,data.length); kd'b_D[$H
} xk,Uf,,>
x4q}xwH
private static class MaxHeap{ v}$Q
layxtECP(
void init(int[] data){ q}@L"a`
this.queue=new int[data.length+1]; oYu xkG
for(int i=0;i queue[++size]=data; O=o}uB-*6
fixUp(size); (K[{X0T
} 9<Pg2#*N0
} ^N={4'G)
o[!'JUxZ
private int size=0; MLdwf}[
2b$>1O&2
private int[] queue; V8n {k'
,XT,t[w
public int get() { ,%9XG077
return queue[1]; Vh\_Ko\V5
} }QI \K
R{@saa5I(>
public void remove() { UdO8KD#r3
SortUtil.swap(queue,1,size--); SP%X@~d
fixDown(1); :xsZz$
} Bq8#'K2i,
file://fixdown xGsOnY;
private void fixDown(int k) { ~}_^$l8#-Q
int j; E/:U,u{
while ((j = k << 1) <= size) { |#yu
if (j < size %26amp;%26amp; queue[j] j++; if'=W6W
if (queue[k]>queue[j]) file://不用交换 kORWj<
break; zVE" 6
SortUtil.swap(queue,j,k); mE<_oRM)
k = j; kZ% AGc
} iV{_?f1jo
} (@^9oN~}
private void fixUp(int k) { 45JL{YRN
while (k > 1) { *Dg@fxCQ
int j = k >> 1; Wg}KQ6 6
if (queue[j]>queue[k]) >|SIqB<%:
break; -m`|Sq
SortUtil.swap(queue,j,k); Km5_P##
k = j; L2VwW
} fJLl-H
} g}+|0FTV
Mk*4J]PP
} )la3GT*1mS
RE t&QP
} x]7:MG$
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SortUtil： li*S^uSF
N]W*ei
package org.rut.util.algorithm; Nn_fhc>
WDw<kX6p
import org.rut.util.algorithm.support.BubbleSort; B!&5*f}*
import org.rut.util.algorithm.support.HeapSort; /O[6PG
import org.rut.util.algorithm.support.ImprovedMergeSort; 2c Xae
import org.rut.util.algorithm.support.ImprovedQuickSort; VN)WBv
import org.rut.util.algorithm.support.InsertSort; vsI;ooR>
import org.rut.util.algorithm.support.MergeSort; R2)@Q
import org.rut.util.algorithm.support.QuickSort; :%gc Sm
import org.rut.util.algorithm.support.SelectionSort; ':4ny]F
import org.rut.util.algorithm.support.ShellSort; 4u5j 7`O
]O|>nTa
/** 0/QDfA?
* @author treeroot >v,X:B?+FL
* @since 2006-2-2 od!44p]
* @version 1.0 ranem0KQ)]
*/ phDIUhL$z
public class SortUtil { !{l% 3'2
public final static int INSERT = 1; ?c8~VQaQ
public final static int BUBBLE = 2; _f!ko<52
public final static int SELECTION = 3; I[%IW4jJ
public final static int SHELL = 4; EP38Ho=[
public final static int QUICK = 5; Qh@Q6
public final static int IMPROVED_QUICK = 6; 7#)k-S!B
public final static int MERGE = 7; H r:*p6
public final static int IMPROVED_MERGE = 8; `ulQ C
public final static int HEAP = 9; R6<'J?k
-)-:rRx-
public static void sort(int[] data) { T.#_v#oM
sort(data, IMPROVED_QUICK); j"jssbu}
} 0Px Hf*
private static String[] name={ JlSqTfA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S\Z*7j3;M
}; S*Ea" vBA
fS}Eu4Xe
private static Sort[] impl=new Sort[]{ 2]fTDKh
new InsertSort(), tM5(&cQ!d
new BubbleSort(), z 4}"oQk:r
new SelectionSort(), *$7^.eHfdd
new ShellSort(), %ZRv+}z
new QuickSort(), Z*Ffdh>*:&
new ImprovedQuickSort(), Hl$qmq
new MergeSort(), Q^{TcL8
new ImprovedMergeSort(), g(P7CX+y
new HeapSort() /,I?"&FWc
}; u4lM>(3Y}
^fKKsfIf
public static String toString(int algorithm){ .yF-<Y
return name[algorithm-1]; H'S~GP4D
} m&AbH&;
Cnpl0rV~5
public static void sort(int[] data, int algorithm) { {ZUk!o>m@
impl[algorithm-1].sort(data); :/6:&7s
} p cD}SY
%#%YU|4R
public static interface Sort { ,8*A#cT B
public void sort(int[] data); <w&'E6mU
} 0084`&Ki
G$zY&
public static void swap(int[] data, int i, int j) { 0of:tZU
int temp = data; 23LG)or.JC
data = data[j]; ]>)}xfL &,
data[j] = temp; u9;3Xn8
} e|A=sCN-
} %w_MRC