[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; g[3LPKQ
} {`QHg O
int i1=l; [|DKBJ
int i2=mid+1; En?V\|,
for(int cur=l;cur<=r;cur++){ tcuwGs>_
if(i1==mid+1) lmvp,BzC
data[cur]=temp[i2++]; 50W+!'
else if(i2>r) _\}'5nmw\
data[cur]=temp[i1++]; CWn\KR
else if(temp[i1] data[cur]=temp[i1++]; O1J&Lwpk,
else xc:E>-
data[cur]=temp[i2++]; b-&iJ &>'
} #) aLD0p
} QPJ\Iu@D$
*1b|j|5v
} Nr~$i%[
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改进后的归并排序: s[yWBew
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package org.rut.util.algorithm.support; fu/8r%:h
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import org.rut.util.algorithm.SortUtil; q@|+`>h
$YL9 vJV
/** nT6y6F_e
* @author treeroot GXtMX ha,
* @since 2006-2-2 <v_=k],W
* @version 1.0 )'_[R@ThB
*/ A`c%p7Z%
public class ImprovedMergeSort implements SortUtil.Sort { 1i76u!{U
|*&l?S
private static final int THRESHOLD = 10; Z/#_Swv
2/LSB8n|
/* O VV@
* (non-Javadoc) H U|.5tP
* :C~Ar]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I"07x'Ahq3
*/ uN|A}/hr]
public void sort(int[] data) { Xn6#q3;^|
int[] temp=new int[data.length]; MMM tB6
mergeSort(data,temp,0,data.length-1); kRp]2^}\s\
} m>@hh#kBg
9wgB JJl7
private void mergeSort(int[] data, int[] temp, int l, int r) { [{znwK@
int i, j, k; !#tVQ2O
int mid = (l + r) / 2; _C?j\Wy
if (l == r) *]6g-E?:@
return; L:R4&|E/t
if ((mid - l) >= THRESHOLD) ~ZHjP_5Q
mergeSort(data, temp, l, mid); *c0H_8e
else FaL\6w
insertSort(data, l, mid - l + 1); /k#-OXP~
if ((r - mid) > THRESHOLD) "HMEoZ
mergeSort(data, temp, mid + 1, r); Wv;0PhF
else +#}GmUwPG$
insertSort(data, mid + 1, r - mid); = tv70d'
^|Ap_!t$;
for (i = l; i <= mid; i++) { h [TwaR
temp = data; Ma YU%h0
} ?YhDjQs
for (j = 1; j <= r - mid; j++) { ]%\,.&=hT
temp[r - j + 1] = data[j + mid]; 615Ya<3f8
} *Rgr4-eS
int a = temp[l]; wj)LOA0
int b = temp[r]; MqyjTY::Xg
for (i = l, j = r, k = l; k <= r; k++) { +&GV-z~o
if (a < b) { j]u!;]
data[k] = temp[i++]; 9^gYy&+>6]
a = temp; 48^-]};
} else { oV|O`n
data[k] = temp[j--]; :6n#y-9^1
b = temp[j]; =%Y1]F
} +C(-f
} ]?9*Vr:P^
} GABZsdFZ!
BI'>\hX/V
/** aukcO;oG<
* @param data Y]z :^D
* @param l fr17|#L+s
* @param i '-iEbE
*/ SSK}'LQ
private void insertSort(int[] data, int start, int len) { "J VIkC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); r`H}f#.KR
} :@A&HkF
} wk(25(1q
} KX)n+{
} (q)}`1d'
? SFBUX(p
堆排序： i8iT}^
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package org.rut.util.algorithm.support; J_Lmy7~xbD
N*Y[[N(
import org.rut.util.algorithm.SortUtil; |OeyPD#
qeZG/\,
/** KVi6vdgD
* @author treeroot dwOfEYC
* @since 2006-2-2 l.Q
* @version 1.0 W .a>K$
*/ ~7m`p3W@
public class HeapSort implements SortUtil.Sort{ M/3;-g
m#"_x{oa
/* (non-Javadoc) ^e:z ul{;]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3Y#Q'r?
*/ ,=/9Ld2w9
public void sort(int[] data) { u 3WU0Z`
MaxHeap h=new MaxHeap(); |G j.E
h.init(data); =RoE=)1&-
for(int i=0;i h.remove(); L&\W+k
System.arraycopy(h.queue,1,data,0,data.length); xIdb9hm<
} Ly=.
6pt,]FlU
private static class MaxHeap{ ;jPsS^X
{^]qaQ[5N
void init(int[] data){ L]Tj]u)
this.queue=new int[data.length+1]; WowKq0sn
for(int i=0;i queue[++size]=data; fu7x,b0p
fixUp(size); }7PJr/IuF
} `bP`.Wm
} hY)zKX_r
,&[o:jTk
private int size=0; D#GuF~-F!R
?1Nz ,Lc$
private int[] queue; gS(3m_
={g"cx
public int get() { =dXHQU&Q
return queue[1]; '5}hm1,
} \kE0h\
g[cnaS|?
public void remove() { %1&X+s3
SortUtil.swap(queue,1,size--); HT7,B(.}
fixDown(1); tI^91I
} #JUh"8N'
file://fixdown ?K-4T
private void fixDown(int k) { GcM1*)$ 4
int j; tP_.-//
while ((j = k << 1) <= size) { m"L^tSD~
if (j < size %26amp;%26amp; queue[j] j++; 2Z; !N37U
if (queue[k]>queue[j]) file://不用交换 QPuc{NcB>
break; g? vz\_
SortUtil.swap(queue,j,k); /#9P0@Y
k = j; A&}]:4@{
} 6AIqoX*p
} yp~z-aRa
private void fixUp(int k) { lhM5a \
while (k > 1) { @tT`s^e
int j = k >> 1; W@!qp
if (queue[j]>queue[k]) Mg >%EH/'
break; gY+d[3N
SortUtil.swap(queue,j,k); (-ELxshd
k = j; bAlty}U
} vhMoCLb
} <v1H1'gv
S6bW r0XR
} 4EYD5
q:_:E*o
} iKq_s5|sW
}a OBQsnO
SortUtil： r?KRK?I
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package org.rut.util.algorithm; rzdQLan
"9s}1C;Me
import org.rut.util.algorithm.support.BubbleSort; ts=D
import org.rut.util.algorithm.support.HeapSort; Ztk%uc8_lM
import org.rut.util.algorithm.support.ImprovedMergeSort; y/@Bhzc
import org.rut.util.algorithm.support.ImprovedQuickSort; =lv(
import org.rut.util.algorithm.support.InsertSort; P%B|HnG^
import org.rut.util.algorithm.support.MergeSort; 1GA.c:
import org.rut.util.algorithm.support.QuickSort; B<~AUf*y
import org.rut.util.algorithm.support.SelectionSort; a|TUH+|
import org.rut.util.algorithm.support.ShellSort; E2l"e?AN~
'7' 73
/** _)@G,E33f@
* @author treeroot xlcCL?qQj
* @since 2006-2-2 h0-.9ym
* @version 1.0 hxdjmc-
*/ <e&v[
public class SortUtil { )4o8SF7lz
public final static int INSERT = 1; Dhm;K$T
public final static int BUBBLE = 2; 9t`yv@.>N
public final static int SELECTION = 3; I3Co
public final static int SHELL = 4; A46dtFD{
public final static int QUICK = 5; S#CaJ}M
public final static int IMPROVED_QUICK = 6; [cFD\"gJAr
public final static int MERGE = 7; aQH]hLvs
public final static int IMPROVED_MERGE = 8; A99;bf}"
public final static int HEAP = 9; Jj%xLv%
nUs=PD3)
public static void sort(int[] data) { H.hKh
sort(data, IMPROVED_QUICK); dJzaP
} {%6 '|<`[
private static String[] name={ +dCR$<e9r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @@a#DjE%/
}; -^np"Jk
TN Z-0
private static Sort[] impl=new Sort[]{ pVl7]_=m
new InsertSort(), T&1-gswr:
new BubbleSort(), a^G>|+8
new SelectionSort(), ']Czn._
new ShellSort(), gdAd7 T
new QuickSort(), uR=*q a
new ImprovedQuickSort(), ]=3hH+1 a
new MergeSort(), o8g]ho
new ImprovedMergeSort(), F:Vl\YZ
new HeapSort() R {-M%n4w
}; dr8Q>(ZY
R0w~ Z
public static String toString(int algorithm){ mE+=H]`.p
return name[algorithm-1]; W`[7|8(6!
} Oo!]{[}7
}If,O
public static void sort(int[] data, int algorithm) { 'D[ *|Qcy
impl[algorithm-1].sort(data); NUBzc'qb
} .K_50%s
YY>&R'3[
public static interface Sort { #BEXj<m+J
public void sort(int[] data); 6DEH|2
} t}K8{ V
,S}wOjb@
public static void swap(int[] data, int i, int j) { 8XfOMf~d`
int temp = data; X#W6;?Z\
data = data[j]; .<K9Zyi
data[j] = temp; Qc Xw -
} 8M4GforP
} :p1_ij]ND