[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; WYRC_U7
} eK(k;$4\^Y
int i1=l; v B~VJKD
int i2=mid+1; dY.X/f
for(int cur=l;cur<=r;cur++){ eN5F@isy
if(i1==mid+1) ?A\+s,9
data[cur]=temp[i2++]; bbS,pid1
else if(i2>r) NApy(e5%
data[cur]=temp[i1++]; IHCxM|/k(M
else if(temp[i1] data[cur]=temp[i1++]; LtwfL^#
else 88:YU4:l`N
data[cur]=temp[i2++]; VDv.N@)7
} zk3\v "
} 28M^F~0
9Bpb?
} ?{ \7th37
id+EBVHAd
改进后的归并排序: :I/9j=@1
\kKd:C{
package org.rut.util.algorithm.support; wbr$w>n
V%;dTCq
import org.rut.util.algorithm.SortUtil; Rf)|p;
XySkm2y
/** f'"PQr^9
* @author treeroot /T {R\
* @since 2006-2-2 ~C>;0a;<:
* @version 1.0 `K@N\VM
*/ lxZ9y
public class ImprovedMergeSort implements SortUtil.Sort { {4SaSv^/
tUJe-3,
private static final int THRESHOLD = 10; 0FL'8!e<
T1RY1hb|g>
/* 9MJ:]F5+
* (non-Javadoc) .K-d
* 9 4bDJy1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1NZpd'$c
*/ L~h:>I+pG
public void sort(int[] data) { 7s%1?$B
int[] temp=new int[data.length]; vMX\q
mergeSort(data,temp,0,data.length-1); ~mvv :u
} 3rZPVR$))
dtV*CX.D.7
private void mergeSort(int[] data, int[] temp, int l, int r) { sqF.,A,
int i, j, k; CD#U`jf
int mid = (l + r) / 2; /W f.Gt9[
if (l == r) #D(=[F
return; |;aZi?Ek[
if ((mid - l) >= THRESHOLD) "ivVIq2
mergeSort(data, temp, l, mid); jp}.W
else ldU ><xc2
insertSort(data, l, mid - l + 1); OU/3U(%n]e
if ((r - mid) > THRESHOLD) ]X7_ji(l,
mergeSort(data, temp, mid + 1, r); .i?{h/9y
else Hsov0
insertSort(data, mid + 1, r - mid); (6H7?nv
=],c$)
for (i = l; i <= mid; i++) { Z s|*+[
temp = data; !jEV75
} "p+oi@
for (j = 1; j <= r - mid; j++) { iM9k!u FE
temp[r - j + 1] = data[j + mid]; xrY >Or
} c>c4IQ&d
int a = temp[l]; |FaK=e
int b = temp[r]; j5n"LC+oz
for (i = l, j = r, k = l; k <= r; k++) { )BaGY
if (a < b) { J^DyhCs
data[k] = temp[i++]; A? jaS9 &)
a = temp; :.BjJ2[S
} else { *yZta:(w-W
data[k] = temp[j--]; >}0H5Q8@
b = temp[j]; 1PWi~1q{Q
} 3AP=
} Yc)Dx3
} &{wRBl#
mo4F\$2N
/** RxPD44jVA
* @param data f2KH&j>~r
* @param l .bV^u
* @param i )FA:wsy~E
*/ FW3E UC)P
private void insertSort(int[] data, int start, int len) { Xfb-< Q0A
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i8cmT+}>
} U"UsQYa_
} @kT@IQkri
} i-WP#\s
} &>Y.$eW_
-!T24/l
堆排序： H8@z/
*U\`HUW
package org.rut.util.algorithm.support; 7FaF]G
})PU`?f
import org.rut.util.algorithm.SortUtil; lFA-T I&
M0vX9;J
/** jgEYlZ
* @author treeroot 8/P!i2o
* @since 2006-2-2 /UR;,ts
* @version 1.0 >*^SQ{9
*/ zrE{CdG%y
public class HeapSort implements SortUtil.Sort{ h<CRW-
ns/*WH&[x
/* (non-Javadoc) S5L0[SZ$!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #+h#b%8
*/ Mbly-l{|
public void sort(int[] data) { D#Mz#\4o
MaxHeap h=new MaxHeap(); Lcy6G%A
h.init(data); AEFd,;GF
for(int i=0;i h.remove(); eAQ-r\h'2
System.arraycopy(h.queue,1,data,0,data.length); Z)3oiLmD
} |hDN$By
h y\iot
private static class MaxHeap{ R:^jQ'1
}U}ppq0Eo
void init(int[] data){ 0E3;f;'X
this.queue=new int[data.length+1]; QQ=tiW
for(int i=0;i queue[++size]=data; w:1UwgcPC
fixUp(size); JnQ@uZb`
} ,a2=OV
} "N,@J-]/k
Gt,VSpb~s
private int size=0; o=lZl_5/u;
v}!^RW'X
private int[] queue; ='e_9b\K
KNF{NFk
public int get() { )C0Iy.N-
return queue[1]; uXA}" f2
} S]e;p\8$Z
( YZ2&
public void remove() { S,Qa\\~z
SortUtil.swap(queue,1,size--); 64'sJc.
fixDown(1); 7^#O{QYol
} (\ |Go-2G
file://fixdown rof9Rxxe-
private void fixDown(int k) { ME5M;bz(
int j; PyQ\O*
while ((j = k << 1) <= size) { G ,`]2'(@
if (j < size %26amp;%26amp; queue[j] j++; &g8Xjx&zj
if (queue[k]>queue[j]) file://不用交换 rNke&z:%X_
break; @!!5el {
SortUtil.swap(queue,j,k); Smh=Q4,W
k = j; $p}q,f.
} E;k$ICOXA
} }1a(*s,s-^
private void fixUp(int k) { XZTH[#MqeI
while (k > 1) { /Ea&Zm
int j = k >> 1; (2RuQgO
if (queue[j]>queue[k]) B\ZCJaMb
break; ^%U`|GBZp
SortUtil.swap(queue,j,k); +t]Ge >S
k = j; R_:lp\S&
} ;jKLB^4nX
} fNrpYR X
Psf{~ (Ii
} e?GzvM'2
^>fr+3a"P
} 3@0!]z^W
*^Z -4
SortUtil： {uqP+Cs
w H`GzB"
package org.rut.util.algorithm; Ty;^3
kH[thRk}
import org.rut.util.algorithm.support.BubbleSort; $P #KL//
import org.rut.util.algorithm.support.HeapSort; T#Z#YMk
import org.rut.util.algorithm.support.ImprovedMergeSort; O_DT7;g
import org.rut.util.algorithm.support.ImprovedQuickSort; m_;XhO
import org.rut.util.algorithm.support.InsertSort; 16~5;u
import org.rut.util.algorithm.support.MergeSort; ?. L]QU
import org.rut.util.algorithm.support.QuickSort; }Os7[4RW
import org.rut.util.algorithm.support.SelectionSort; @JJ{\?>
import org.rut.util.algorithm.support.ShellSort; ,s,AkH
W$z^U)|t
/** NR^3 1&}It
* @author treeroot F*4G@)
* @since 2006-2-2 zRR^v&.9K
* @version 1.0 ki?V eFp
*/ _Qb].~
public class SortUtil { lI9|"^n7F
public final static int INSERT = 1; ZV-Yq !|t
public final static int BUBBLE = 2; ,L\KS^>
public final static int SELECTION = 3; Izfq`zS+\s
public final static int SHELL = 4; O? 7hT!{
public final static int QUICK = 5; _~y-?(46K
public final static int IMPROVED_QUICK = 6; mF>{cVTF
public final static int MERGE = 7; {JfL7%
public final static int IMPROVED_MERGE = 8; zUWWXC%R
public final static int HEAP = 9; GIS,EwA
_( QW2m?K
public static void sort(int[] data) { *M$$%G(4
sort(data, IMPROVED_QUICK); MiMDEe%f%
} Ud#xgs'
private static String[] name={ 1b2xWzpG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Xw162/:h
}; 8xoC9!xt
K8v@)
private static Sort[] impl=new Sort[]{ a,xy38T<
new InsertSort(), 0p*Oxsy
new BubbleSort(), w)>/fG|;
new SelectionSort(), $WQm"WAKe
new ShellSort(), HoZsDs.XZ
new QuickSort(), P qa;fiJ)
new ImprovedQuickSort(), Rf{YASPIw&
new MergeSort(), q9Lq+4\
new ImprovedMergeSort(), ~x+&cA-0A2
new HeapSort() Saks~m7,
}; C&.Q|S2_
Q6r
public static String toString(int algorithm){ WvcPOt8Bp>
return name[algorithm-1]; 1[e%E#h
} }e>OmfxDBt
uJ3*AO
public static void sort(int[] data, int algorithm) { %)o;2&aD
impl[algorithm-1].sort(data); LP?*RrM
} ztC,[
1E$^ul-v
public static interface Sort { V'l9fj*E
public void sort(int[] data); "Q[?W(SA
} ;F/w&u.n
}l5Q0'
public static void swap(int[] data, int i, int j) { T^2o'_:
int temp = data; q9nQ/]rkHF
data = data[j]; MX|@x~9W
data[j] = temp; _u#r;h[
} 5^N`~
} h0-CTPQ7A