[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; 4?3*%_bDJ,
} Rl2*oOVz
int i1=l; 28N v'
int i2=mid+1; 3TS(il9A
for(int cur=l;cur<=r;cur++){ ;E{k+vkqy
if(i1==mid+1) j>KJgSs]&\
data[cur]=temp[i2++]; V7\@g
else if(i2>r) qbwX*E~;
data[cur]=temp[i1++]; ZI8*PX%2
else if(temp[i1] data[cur]=temp[i1++]; J4Tc q
else B9glPcy}SS
data[cur]=temp[i2++]; }hPFd
} $B3<"
} ,( ?q
I2R" Y<
} OE=]/([
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改进后的归并排序: tAM t7p-
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package org.rut.util.algorithm.support; :"pA0oB
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import org.rut.util.algorithm.SortUtil; uN)o|7
6zGM[2
/** 3~mi
* @author treeroot 9 Z5!3
* @since 2006-2-2 $%3"@$
* @version 1.0 ? !dy
*/ v9t26>{~
public class ImprovedMergeSort implements SortUtil.Sort { [1\k'5rp
eA$wJ$*
private static final int THRESHOLD = 10; 0F495'*A
_+vE(:T
/* T|{1,wP
* (non-Javadoc) /4}B}"`Sl=
* mT7B#^H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kX2bU$1Q,i
*/ 0"vI6Lm
public void sort(int[] data) { %}nNwuJ
int[] temp=new int[data.length]; A=(<g";m
mergeSort(data,temp,0,data.length-1); 7t@r}rC,K
} v|&Nh?r
?Bdhn{_
private void mergeSort(int[] data, int[] temp, int l, int r) { !FqJP OGm
int i, j, k; /g_cz&luR
int mid = (l + r) / 2; zB?} {@
if (l == r) p:GB"e9>H
return; LL}|#%4d
if ((mid - l) >= THRESHOLD) r}1.=a
mergeSort(data, temp, l, mid); xxsax/h
else oVK3=m@{
insertSort(data, l, mid - l + 1); E,/<;
if ((r - mid) > THRESHOLD) tLz,t&h
mergeSort(data, temp, mid + 1, r); i Sm .E
else ID#p5`3n
insertSort(data, mid + 1, r - mid); m!qbQMXn
IsC`r7
for (i = l; i <= mid; i++) { +p%!G1Yz
temp = data; %l#i9$s
} T;f`ND2fY
for (j = 1; j <= r - mid; j++) { DaN=NURDV
temp[r - j + 1] = data[j + mid]; E=-ed9({:
} cQ?eL,z
int a = temp[l]; TvbkvK
int b = temp[r]; \%qzTk.&r
for (i = l, j = r, k = l; k <= r; k++) { TspuZR@2
if (a < b) { su/!<y
data[k] = temp[i++]; .}wVM`81z
a = temp; q,8TOn
} else { oV(|51(f
data[k] = temp[j--]; X4c|*U=4
b = temp[j]; 3u)NkS=
} biBo?k;4
} sUCI+)cM3
} cILI%W1
V+A9.KoI
/** i; qb\
* @param data 2~*J<iO&l
* @param l e|t@"MxvC
* @param i JZa^GW:YQh
*/ E=H>|FgS
private void insertSort(int[] data, int start, int len) { z^ai *
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +PlA#DZu
} l8XgzaW
} LXZ0up-B-
} V>$A\AWw
} {CO]wqEj
e2~$=f-
堆排序： wNk 0F7Ck
L[|($vQ"
package org.rut.util.algorithm.support; P1r)n{;
<WHu</
import org.rut.util.algorithm.SortUtil; hLv~N}
B$Z%_j&
/** Qb.Ve7c
* @author treeroot QGR}`n2D
* @since 2006-2-2 ^5MPK@)c,/
* @version 1.0 W<QMUu
*/ >l0y ss)I
public class HeapSort implements SortUtil.Sort{ u/I|<NAC,
K+s@.D9J
/* (non-Javadoc) B2R^oL'}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a_GnN\kX^Z
*/ >8*0"Q
public void sort(int[] data) { R7nT,7k.
MaxHeap h=new MaxHeap(); YQH=]5r
h.init(data); ;v*J:Mn/=
for(int i=0;i h.remove(); __3s3YG
System.arraycopy(h.queue,1,data,0,data.length); I1a>w=x!+
} ma gZmY~
c SV`?[a
private static class MaxHeap{ 7K5D,"D;1
9GV1@'<Y]
void init(int[] data){ $ #*";b)QY
this.queue=new int[data.length+1]; C8xxR~mq
for(int i=0;i queue[++size]=data; j& H4L
fixUp(size); 5Al1u|;HB
} N4xCZb
} 1@i|[dq
`<"@&N^d
private int size=0; YUGEGXw
H,{WrWA
private int[] queue; B%.vEk)*
G[bWjw86O
public int get() { w|k?2 ?&
return queue[1]; mr6~8I
} ]U,c`?[7#
FJ/c(K
public void remove() { -PG81F&K
SortUtil.swap(queue,1,size--); ^D%hKIT
fixDown(1); kA"|PtrW
} j@Ta\a-,x
file://fixdown VqIzDs
private void fixDown(int k) { }x9D;%)/
int j; UqA<rW
while ((j = k << 1) <= size) { }MiEbLduN
if (j < size %26amp;%26amp; queue[j] j++; XHh!Q0v;
if (queue[k]>queue[j]) file://不用交换 ;h-W&i7
break; t/kMV6
SortUtil.swap(queue,j,k); 0p31C7!
k = j; >x3$Ld
} T[L7-5U0
} %aB RL6
private void fixUp(int k) { L%CBz]`
while (k > 1) { %*A|hK+G:W
int j = k >> 1; "C/X#y
if (queue[j]>queue[k]) og~Uv"&?T
break; 0DB8[#i%:
SortUtil.swap(queue,j,k); z|k0${iu#
k = j; '| 6ZPv&N
} 'O+)[D
} Gpb<,v_3
y[64O x
} #1z/rUh`Cr
?s-Z3{k
} _pN:p7l(
c]+uj q
SortUtil： @4]} J-3
`Q!#v{
package org.rut.util.algorithm; +td]g9Ie
GD-cP5$
import org.rut.util.algorithm.support.BubbleSort; 6>Z)w}x^
import org.rut.util.algorithm.support.HeapSort; ;ipT0*Y
import org.rut.util.algorithm.support.ImprovedMergeSort; TZ+- >CG
import org.rut.util.algorithm.support.ImprovedQuickSort; z4iTf8
import org.rut.util.algorithm.support.InsertSort; b9Mp@I7Q-
import org.rut.util.algorithm.support.MergeSort; 8:sQB%BB
import org.rut.util.algorithm.support.QuickSort; *mjPNp'3{m
import org.rut.util.algorithm.support.SelectionSort; bP)(4+t~
import org.rut.util.algorithm.support.ShellSort; 1$#1
8n"L4jb(:
/** U0ZPY )7k
* @author treeroot !Pc&Sg
* @since 2006-2-2 Wi+}qO
* @version 1.0 F^Y%Q(Dd7w
*/ @QO^3%b8
public class SortUtil { hQ@E2Xsv
public final static int INSERT = 1; .gclE~h.
public final static int BUBBLE = 2; gski:C
public final static int SELECTION = 3; h3rVa6cxM
public final static int SHELL = 4; QF4)@ r{2x
public final static int QUICK = 5; 9q]n&5
public final static int IMPROVED_QUICK = 6; k4-S:kVo
public final static int MERGE = 7; V)Sw\tS6g
public final static int IMPROVED_MERGE = 8; $z[@DB[
public final static int HEAP = 9; \&MJ(F>vJ
3]li3B'
public static void sort(int[] data) { )qua0'y]@
sort(data, IMPROVED_QUICK); X#<+D1P
} !!+LFe4su
private static String[] name={ ;wa#m1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" VD~ %6AjyN
}; "8iIOeY-\
P}=U #AV4
private static Sort[] impl=new Sort[]{ '>k1h.i
new InsertSort(), yXT.]%)
new BubbleSort(), M3VTzwuf^S
new SelectionSort(), `>Ms7G9S~e
new ShellSort(), -xVZm8y
new QuickSort(), tNG[|Bi#
new ImprovedQuickSort(), hYbaVE
new MergeSort(), nt_FqUJ
new ImprovedMergeSort(), W+I""I*mV
new HeapSort() bk|?>yd
}; ^O QeOTF
0WSOA[R%[b
public static String toString(int algorithm){ L_Xbca=
return name[algorithm-1]; nIWY<Z"
} Vtv~jJ{m
]YrgkC35
public static void sort(int[] data, int algorithm) { hplxs#
impl[algorithm-1].sort(data); sQmJ3 (:HO
} sLd%m+*p
[4r<WvUaM
public static interface Sort { j;J`PH
public void sort(int[] data); 6F_:,b^
} 5c0$oyl)M
5VSc5*[
public static void swap(int[] data, int i, int j) { rpUTn!*u/
int temp = data; .aQ8I1~
data = data[j]; .#}A/V.-Y
data[j] = temp; _H"_&m$aDm
} !n<SpW;
} +xS<^;