[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; /74)c~.W
} Gsz$H_
int i1=l; ]}.|b6\
int i2=mid+1; ^Of\l:q*
for(int cur=l;cur<=r;cur++){ g``S SU
if(i1==mid+1) c4bvJy8
data[cur]=temp[i2++]; 7Oi<_b
else if(i2>r) t&IWKu#
data[cur]=temp[i1++]; >;}(?+|f
else if(temp[i1] data[cur]=temp[i1++]; -<tTT
else Dj3,SJ*x
data[cur]=temp[i2++]; #fXy4iL l
} %2^V.`0T
} K1o&(;l8G
"5<YN#
} :zpT Gk8Z
M"$g*j
改进后的归并排序: IU"8.(;o
ly@%1
package org.rut.util.algorithm.support; x6vkd%fCj
c]|Tg9AW
import org.rut.util.algorithm.SortUtil; ojVN-*5
;)ERxMun
/** sGa "
* @author treeroot Vq^b_^
* @since 2006-2-2 N1U.1~U
* @version 1.0 'Hu+8,xA
*/ %Siw>
public class ImprovedMergeSort implements SortUtil.Sort { ppeF,Q
V2g"5nYT
private static final int THRESHOLD = 10; \\Z?v,XsS
Q_*.1L
/* CM t$)
* (non-Javadoc) z*o2jz?t4
* bvT$/(7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `u8(qGg7GF
*/ r'@7aT&_
public void sort(int[] data) { bKh}Y`
int[] temp=new int[data.length]; ft!D2M
mergeSort(data,temp,0,data.length-1); x@|10GC#:
} _J,*0~O$
T ^/\Rr
private void mergeSort(int[] data, int[] temp, int l, int r) { f3<2531/}
int i, j, k; dx.Jv/Mb
int mid = (l + r) / 2; %mOQIXr1s
if (l == r) aED73:b
return; Z'd]oNF
if ((mid - l) >= THRESHOLD) %d /]8uO
mergeSort(data, temp, l, mid); 'a~F'FN$
else =~q$k
insertSort(data, l, mid - l + 1); `Y,Rk
if ((r - mid) > THRESHOLD) $]a*ZHd;2&
mergeSort(data, temp, mid + 1, r); &C#?&AQ
else C @P$RVS
insertSort(data, mid + 1, r - mid); -y/Y%]%0
T6\d]
for (i = l; i <= mid; i++) { G%CS1#
temp = data; +5%ncSJx
} <B+ WM
for (j = 1; j <= r - mid; j++) { ;U?323Z
temp[r - j + 1] = data[j + mid]; WGUd@lC~
} HLqDI lL
int a = temp[l]; lEw!H^O4
int b = temp[r]; |w>d]eA5
for (i = l, j = r, k = l; k <= r; k++) { '1Ex{$Yk
if (a < b) { #6#%y~N
data[k] = temp[i++]; 2=|Ks]<P
a = temp; Jb)xzUhES
} else { FWLLbL5t
data[k] = temp[j--]; oYWHO<b
b = temp[j]; k~JTQh*,w
} .8wF> 8
} #5X+.!L
} b>'c
O`;o"\P<
/** 31p7oRzr
* @param data g c<Y?a-
* @param l "rpP
* @param i }RQHsS
*/ 1WI^RlWd(
private void insertSort(int[] data, int start, int len) { r4]hcoU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /5?tXH"
} ~^o YPd52*
} m;vm7]5
} k:&B b"
} ZtpbKy!\$B
`a@YbuLd
堆排序： ];QX&";Z
+t(Gt0+
package org.rut.util.algorithm.support; !{A#\~,
Jn20^YG
import org.rut.util.algorithm.SortUtil; $;)A:*e
rt\.|Hr4s
/** +0:]KG!Zs.
* @author treeroot PE6ZzxR|U<
* @since 2006-2-2 x. /WP~I
* @version 1.0 %KR2Vlh0
*/ i,l$1g-i
public class HeapSort implements SortUtil.Sort{ Z{_YH7_
gbu)bqu2x
/* (non-Javadoc) mqiCn]8G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =ibKdPtTh^
*/ ~;oaW<"
public void sort(int[] data) { ra1_XR}
MaxHeap h=new MaxHeap(); {G=|fgz
h.init(data); hE +M|#o
for(int i=0;i h.remove(); =r~ExW}+
System.arraycopy(h.queue,1,data,0,data.length); x, 'KI?TyQ
} >{"E~U
= @lM*
private static class MaxHeap{ UvL=^*tm
2hb>6Z;r]K
void init(int[] data){ VzWH9%w
this.queue=new int[data.length+1]; '.7ER
for(int i=0;i queue[++size]=data; 9ol&p>
fixUp(size); 9]g`VD6<v
} f~f)6XU|
} =@d->d
kU{a!ca4
private int size=0; J #;|P-pt
H9[0-Ur5
private int[] queue; w|-m*v .
4@Bl 1b[<
public int get() { Q|7m9~
return queue[1]; )p{,5"0u
} p }3$7CR/
R^yh,
public void remove() { 43!E>mq
SortUtil.swap(queue,1,size--); :\%ZTBLL
fixDown(1); (b7',:_U7
} iz27yXHZ~
file://fixdown ziv*4
private void fixDown(int k) { >|1-o;UU
int j; H^jcWwy:
while ((j = k << 1) <= size) { Lv>OBHD
if (j < size %26amp;%26amp; queue[j] j++; Dt'bbX'edw
if (queue[k]>queue[j]) file://不用交换 t* =i8`8
break; L^Fb;sJYI
SortUtil.swap(queue,j,k); m=60a@o]
k = j; g2YE^EKU~
} z#6(PZC}
} ,]tMZ?n8
private void fixUp(int k) { m-Qy6"eW
while (k > 1) { .cr<.Ov
int j = k >> 1; zOYG`:/'
if (queue[j]>queue[k]) $ou/ Fn
break; e1ExB#
SortUtil.swap(queue,j,k); $NBQv6#:
k = j; )c<[@::i
} QvlVjDIy
} yL23Nqe
j/1f|x
} Z5@E|O&
(bD#PQXzm
} ?BU?c:"f
oKPG0iM:
SortUtil： @u:q#b
&pHXSU
package org.rut.util.algorithm; 8(}cbW
b.cBg.a
import org.rut.util.algorithm.support.BubbleSort; K}p0$Lc
import org.rut.util.algorithm.support.HeapSort; P}he}k&IR
import org.rut.util.algorithm.support.ImprovedMergeSort; C-&s$5MzGb
import org.rut.util.algorithm.support.ImprovedQuickSort; ksyQ_4^SO
import org.rut.util.algorithm.support.InsertSort; pV$A?b"?*
import org.rut.util.algorithm.support.MergeSort; 7s0pH+
import org.rut.util.algorithm.support.QuickSort; "7w=LhzV[$
import org.rut.util.algorithm.support.SelectionSort; 'T]Ok\
import org.rut.util.algorithm.support.ShellSort; %<MI]D
!j9(%,PR
/** J$S*QCo
* @author treeroot Qa"4^s
* @since 2006-2-2 "J2v8c
* @version 1.0 hSaw)g`w
*/ CJ6vS
public class SortUtil { {#z[iiB
public final static int INSERT = 1; fbJa$
public final static int BUBBLE = 2; Eg1|Kg\&
public final static int SELECTION = 3; )IKqO:@
public final static int SHELL = 4; zT'(I6S:)
public final static int QUICK = 5; Q 34-a"6)
public final static int IMPROVED_QUICK = 6; b6@0?_n
public final static int MERGE = 7; %z-n2%
public final static int IMPROVED_MERGE = 8; w=[ITQ|W%
public final static int HEAP = 9; {&nDm$KTD
QM{B(zH
public static void sort(int[] data) { }s.\B
sort(data, IMPROVED_QUICK); p@wtT"Y
} y/"CWD/i
private static String[] name={ [+qB^6I+P%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ',I$`h
}; vQ>8>V
o)H| #9h5
private static Sort[] impl=new Sort[]{ @Suww@<
new InsertSort(), #_zj5B38E
new BubbleSort(), F/"lJ/I
new SelectionSort(), 9 $zx<O
new ShellSort(), Jjh=zxR>
new QuickSort(), VgMuX3=
new ImprovedQuickSort(), }U**)"
new MergeSort(), )a$sx}
new ImprovedMergeSort(), H:o=gP60]
new HeapSort() /.(F\2+A
}; FmQiy+.|
QG09=GQ
public static String toString(int algorithm){ |Rb8/WX
return name[algorithm-1]; #2%8@?_-M
} +l<;?yk:;
|C7=$DgwY
public static void sort(int[] data, int algorithm) { % xBQX
impl[algorithm-1].sort(data); cK'}+
} Nb\B*=4AR
f_IsY+@
public static interface Sort { -90X^]
public void sort(int[] data); z/i&Lpr:
} }L>0}H
Q1x=@lXR
public static void swap(int[] data, int i, int j) { #YSFiy:+r_
int temp = data; + ,rl\|J%
data = data[j]; ,+FiP{`
data[j] = temp; +aOX{1w
} P} Y .
} $Eo-58<q