[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; M<Wi:r:
} 9;#RzelSp
int i1=l; V^,gpTyv*
int i2=mid+1; X8*g#lO?
for(int cur=l;cur<=r;cur++){ -F7F 6!s
if(i1==mid+1) J.yM@wPS>
data[cur]=temp[i2++]; G[mqLI{q
else if(i2>r) Lyhuyb)k5^
data[cur]=temp[i1++]; ?CAU+/
else if(temp[i1] data[cur]=temp[i1++]; -UkK$wP5
else c;kU|_
data[cur]=temp[i2++]; m,Y/ke\
} ZK]qQrIwy
} {J==y;dK
Bg]VaTm[=
} Ow4_0l&
-LiGO#U
改进后的归并排序: 4<-Kd~uL
eS!]..%y
package org.rut.util.algorithm.support; 6o^>q&e}%
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import org.rut.util.algorithm.SortUtil; M)ET1ZM
,4H? +|!
/** WhW}ZS'r
* @author treeroot ceG\Q2
* @since 2006-2-2 hH`x*:Qja
* @version 1.0 iI<c
*/ tLOGj?/r
public class ImprovedMergeSort implements SortUtil.Sort { Gk~aTO
r)|~Rs!y,
private static final int THRESHOLD = 10; LWM<[8wJ4
T!H(Y4A
/* } [#8>T
* (non-Javadoc) NIQ}A-b
* Z^V;B _
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DKS1Sm6d0
*/ j~N*TXkC
public void sort(int[] data) { H=BI%Z
int[] temp=new int[data.length]; s^zlBvr|.
mergeSort(data,temp,0,data.length-1); I#MPJ@*WT
} fo,0NxF9
sLA.bp.O
private void mergeSort(int[] data, int[] temp, int l, int r) { 4<($ZN8
int i, j, k; 'mZv5?
int mid = (l + r) / 2; ^# $IoW
if (l == r) 7 {92_xRL
return; Z)|~
if ((mid - l) >= THRESHOLD) aLg,-@
mergeSort(data, temp, l, mid); \s#~ %l
else kx(beaf
insertSort(data, l, mid - l + 1); 1;/SXJ s
if ((r - mid) > THRESHOLD) b;VIR,2
mergeSort(data, temp, mid + 1, r); 7"Xy8]i{z
else zn>lF
insertSort(data, mid + 1, r - mid); edMCj
GUu8 N
for (i = l; i <= mid; i++) { R%3yxnM*
temp = data; Z@euO~e~
} TIJH}Ri
for (j = 1; j <= r - mid; j++) { d`= ~8`
temp[r - j + 1] = data[j + mid]; sGY}(9ED;
} C)U4Fr ?E:
int a = temp[l]; M1eh4IVE?
int b = temp[r]; sR/Yv
for (i = l, j = r, k = l; k <= r; k++) { ""7H;I&
if (a < b) { e&x)g;bn
data[k] = temp[i++]; <ci(5M
a = temp; 7;p/S#P:
} else { bR7tmJ[)Z
data[k] = temp[j--]; cgG*7E
b = temp[j]; .h <=C&Yg
} fcdXj_u
} G T~rr*X
} &n| <NF
=-oP,$k
/** M<Bo<,!ua
* @param data n*9QSyJN]
* @param l S!A:/(^WB
* @param i @2"uJ6o
*/ P.>fkO1\
private void insertSort(int[] data, int start, int len) { -F/)-s6#!'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); oL~1M=r
} }m<+tn3m
} sFZdj0tQ4
} p8 S~`fjV
} N_ ODr]L
Dl.<(/
堆排序： Y"t|0dO%b
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package org.rut.util.algorithm.support; q2xAx1R`sV
iY`[dsT
import org.rut.util.algorithm.SortUtil; t?&;
aO$0[-A
/** +On2R&m
* @author treeroot imADjBR]
* @since 2006-2-2 jk`U7G*
* @version 1.0 IsT}T}p,t
*/ Uhvy2}w
public class HeapSort implements SortUtil.Sort{ YN)qMI_`A
Pm P&Qje7
/* (non-Javadoc) 9=}#.W3.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )Jvo%Y
*/ IgJG,!>h
public void sort(int[] data) { |d&Kr0QIV
MaxHeap h=new MaxHeap(); c*#$sZ@YA
h.init(data); d0T 8Cwcb
for(int i=0;i h.remove(); *As"U99(
System.arraycopy(h.queue,1,data,0,data.length); yx#!2Z0hw
} }{:Jj/d p
.Od@i$E>&
private static class MaxHeap{ b:9"nALgC
?4%#myO3a
void init(int[] data){ d3a!s
this.queue=new int[data.length+1]; L"0dB.
for(int i=0;i queue[++size]=data; J_+2]X7n
fixUp(size); rk%pA-P2
} %l%ad-V
} 0Bgj.?l
a:P+HU:
private int size=0; \gT({XU?
q !}~c
private int[] queue; !gyW15z'
'~yxu$aK
public int get() { z*VK{O)o
return queue[1]; 6GAEQ]
} Y, Lpv|
N\s-{7K
public void remove() { k3LHLJZ#
SortUtil.swap(queue,1,size--); BV<_1WT}
fixDown(1); Foj|1zJS_
} CNV^,`FX
file://fixdown {y{O ze
private void fixDown(int k) { bfb9A+]3'
int j; zBca$Vp
while ((j = k << 1) <= size) { \*5z0A9)5)
if (j < size %26amp;%26amp; queue[j] j++; S^1ZsD.
if (queue[k]>queue[j]) file://不用交换 ??Urm[Y.Z
break; a"}ndrc*
SortUtil.swap(queue,j,k); `E;xI v|
k = j; uYO$gRem
} ENA"T-p
} [fwk[qFa
private void fixUp(int k) { P7X3>5<;q
while (k > 1) { '4GN%xi
int j = k >> 1; uQ ]ZMc
if (queue[j]>queue[k]) 1.,KN:qe
break; t\:=|t,
SortUtil.swap(queue,j,k); ;fQIaE&H
k = j; "\lOOp^-
} *k&V;?x|wt
} 6[FXgCb
<D& Ep
} V~8]ag4
lRS'M,/
} )~xH!%4F
lV./K;\T
SortUtil： //3fgoly
> B;YYj~f}
package org.rut.util.algorithm; lwG)&qyVd
Dm?:j9o]g
import org.rut.util.algorithm.support.BubbleSort; d=\TC'd"{
import org.rut.util.algorithm.support.HeapSort; :rk6Stn$z
import org.rut.util.algorithm.support.ImprovedMergeSort; 2.{zfr
import org.rut.util.algorithm.support.ImprovedQuickSort; vytO8m%U
import org.rut.util.algorithm.support.InsertSort; 7#&Q-3\:
import org.rut.util.algorithm.support.MergeSort; 5ld?N2<8/
import org.rut.util.algorithm.support.QuickSort; wU/fGg*M2
import org.rut.util.algorithm.support.SelectionSort; `S3)uV]I
import org.rut.util.algorithm.support.ShellSort; QXa2qxTc
`Y!8,(5#
/** =(R3-['QIb
* @author treeroot %b h:c5
* @since 2006-2-2 <Pf4[q&wM
* @version 1.0 O#!|2qN
*/ [Tvdchl OC
public class SortUtil { ~USyN'5lU7
public final static int INSERT = 1; 0e:j=kd)NH
public final static int BUBBLE = 2; 6h) &h1Yd
public final static int SELECTION = 3; Wj)v,v2&
public final static int SHELL = 4; RP 6<#tq,
public final static int QUICK = 5; 19[.&-u"
public final static int IMPROVED_QUICK = 6; [Ak0kH>
public final static int MERGE = 7; %LqT>HXJ
public final static int IMPROVED_MERGE = 8; WK0IagYw
public final static int HEAP = 9; F *U.cJ%
;B }4pv}
public static void sort(int[] data) { lN"@5(5%
sort(data, IMPROVED_QUICK); -`X`Ff
} hq&9S{Ep
private static String[] name={ A*|\E:fo
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3 l j^I
}; Rb^G~82d?
B<.ZW}#v
private static Sort[] impl=new Sort[]{ m.gv?
new InsertSort(), ;Ob^@OM
new BubbleSort(), ]W`M <hEI
new SelectionSort(), 7 > _vH]
new ShellSort(), BEAY}P(y3
new QuickSort(), dtG>iJ
new ImprovedQuickSort(), q&:%/?)x
new MergeSort(), McbbEs=)
new ImprovedMergeSort(), wZ`*C mr
new HeapSort() fC}uIci
}; d&ff1(j(
%n,_^voE
public static String toString(int algorithm){ DHvZ:)aT}
return name[algorithm-1]; A&jR-%JG
} $EdL^Q2KAy
fU.z_T[@
public static void sort(int[] data, int algorithm) { nb*`GE
impl[algorithm-1].sort(data); 7pyaHe
} s gZlk9x!Q
6!Mm")
public static interface Sort { qjg Z
public void sort(int[] data); soLmr's
} zG%'Cw)8
bx-:aC)]2
public static void swap(int[] data, int i, int j) { _$8:\[J
int temp = data; IO2@^jup
data = data[j]; oe=1[9T"
data[j] = temp; s=K?-O
} m*lcIa
} yI-EF)A@;