[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; 2{D{sa
} Id*Ce2B
int i1=l; PYQ;``~x
int i2=mid+1; JR'
for(int cur=l;cur<=r;cur++){ q~ tz? T_
if(i1==mid+1) 88Ey12$
data[cur]=temp[i2++]; 8."]//V
else if(i2>r) xP_cQwm`1
data[cur]=temp[i1++]; a@8v^G
else if(temp[i1] data[cur]=temp[i1++]; AW%50V
else [<7@{;r
data[cur]=temp[i2++]; 0mpX)S
} #akpXdXs
} "33Fv9C#bK
0Vj4+2?L5;
} D{!6Y*d6&s
'QJ:`)z
改进后的归并排序: 90Pl$#cb2
dMPc:tJT
package org.rut.util.algorithm.support; ,ZaRy$?
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import org.rut.util.algorithm.SortUtil; <5d~P/,
FO+Zue.RS
/** `-.%^eIp
* @author treeroot svsqg{9z
* @since 2006-2-2 -#7'r<I9@
* @version 1.0 LuNc,n%
*/ ~Io7]
public class ImprovedMergeSort implements SortUtil.Sort { j_/>A=OD
*lYVY)L
private static final int THRESHOLD = 10; '>NCMB{*
7jxslI&F
/* RW|`nL
* (non-Javadoc) 9"NF/)_
* yZ @"\Z!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m];]7uB5=
*/ ,ly\Ka?zO
public void sort(int[] data) { =FlDb 5t{
int[] temp=new int[data.length]; Z|%_&M
mergeSort(data,temp,0,data.length-1); O $LfuL
} rTM}})81
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private void mergeSort(int[] data, int[] temp, int l, int r) { j@=%_^:i
int i, j, k; R}'bP
int mid = (l + r) / 2; R(!s
if (l == r) UXeN8
return; B+Rm>^CBm
if ((mid - l) >= THRESHOLD) ^tqzq0
mergeSort(data, temp, l, mid); @u.58H& }R
else WeJl4wF
insertSort(data, l, mid - l + 1); ` w=>I
if ((r - mid) > THRESHOLD) >d*iD
mergeSort(data, temp, mid + 1, r); ^b/ Z)3
else ?iPC*
insertSort(data, mid + 1, r - mid); I*%-cA%l
G(Lzf(
for (i = l; i <= mid; i++) { o#;b
temp = data; t,QyfN
} DD7h^-x
for (j = 1; j <= r - mid; j++) { $g@=Z"
temp[r - j + 1] = data[j + mid]; IW>T}@ |
} ;t'5},(FP
int a = temp[l]; ,qA(\[
int b = temp[r]; ^.1)};i
for (i = l, j = r, k = l; k <= r; k++) { ={_C&57N1
if (a < b) { !\"EFVH
data[k] = temp[i++]; qUh2hz:
a = temp; -jW.TT h]
} else { .Fs7z7?Y
data[k] = temp[j--]; 2n3W=dF
b = temp[j]; 0f~C#/[t7
} :a^t3s
} Ed"h16j?z
} e63uLWDT
4h~iPn'Wl
/** +$u$<z3Q
* @param data 'GB.UKlR
* @param l YbR!+ 0\g
* @param i +lm{Olm'^
*/ Fa?~0H/DL
private void insertSort(int[] data, int start, int len) { RwKdxK+;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); vo`2\R.
} 05z,b]>l
} 34z"Pm
} io _1Y]N
} -!q:p&c
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堆排序： V\{clJ\U
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package org.rut.util.algorithm.support; q_TRq:&.
ADS9DiX/
import org.rut.util.algorithm.SortUtil; OSlvwH%(EE
M}d_I+
/** ahuGq'
* @author treeroot Hcl(3>Jn2
* @since 2006-2-2 K$>%e36Cc
* @version 1.0 ->sm+H-*
*/ ?sab*$wG
public class HeapSort implements SortUtil.Sort{ 4 K!JQ|9
oT^{b\XN
/* (non-Javadoc) LISMngQ.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ./,/y"x
*/ JF # # [O
public void sort(int[] data) { mZk]l5Lc
MaxHeap h=new MaxHeap(); ,ek_R)&[o
h.init(data); D6%J\C13`
for(int i=0;i h.remove(); tro7Di2Q
System.arraycopy(h.queue,1,data,0,data.length); ?h.wK
} TX$r`~
JM=JH 51`
private static class MaxHeap{ [f)cL6AeF
\!>3SKs(e
void init(int[] data){ *#E FsUw
this.queue=new int[data.length+1]; cU;iUf
for(int i=0;i queue[++size]=data; }M1`di4e
fixUp(size); '3_]Gu-D
} |y&*MTfV4L
} Z8zmHc"IH
}x@2]juJ
private int size=0; u6T+Cg
18~>ZR
private int[] queue; qLw{?sH}J/
#i@;J]x(
public int get() { _]yn"p
return queue[1]; HIQ_%L4]
} 0KYEb%44
UmNa[s
public void remove() { )T';qm0w
SortUtil.swap(queue,1,size--); IAYR+c
fixDown(1); 2HpHxVJ
} vk+VP 1D
file://fixdown |rJ=Ksc
private void fixDown(int k) { t0o`-d(
int j; =o Xsb
while ((j = k << 1) <= size) { ZNf6;%oGG
if (j < size %26amp;%26amp; queue[j] j++; Q o?O:
if (queue[k]>queue[j]) file://不用交换 6qRx0"qB
break; H18Tn!RDS
SortUtil.swap(queue,j,k); d p2F
k = j; #1`-*.u
} C 'v+f=
} \Z]UA&v_
private void fixUp(int k) { eAXc:222
while (k > 1) { v\!Be[ ?
int j = k >> 1; bvS(@
if (queue[j]>queue[k]) afv~r>q(-
break; OZx W?wnd
SortUtil.swap(queue,j,k); )>.&N[v
k = j; ]e^c=O`$
} }R1< 0~g
} s>0't
T,]7ICF#
} "B=
$>GgB`
} p;._HJ(
:z4)5= 6M
SortUtil： q<\,
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package org.rut.util.algorithm; 7Bb9t
vV[eWd.o6M
import org.rut.util.algorithm.support.BubbleSort; lLp^Gt^}w(
import org.rut.util.algorithm.support.HeapSort; q[HTnx
import org.rut.util.algorithm.support.ImprovedMergeSort; lL{5SH<Q
import org.rut.util.algorithm.support.ImprovedQuickSort; t *1u[~=
import org.rut.util.algorithm.support.InsertSort; 5|l* `J)
import org.rut.util.algorithm.support.MergeSort; "SzdDY6
import org.rut.util.algorithm.support.QuickSort; 8S%52W|
import org.rut.util.algorithm.support.SelectionSort; qp/v^$EA
import org.rut.util.algorithm.support.ShellSort; BnCbon)
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/** SF&BbjBE0
* @author treeroot Kz>3 ic$I
* @since 2006-2-2 gUxP>hB
* @version 1.0 ? i( %
*/ ]Bm/eRy"
public class SortUtil { :X.b}^Z(
public final static int INSERT = 1; +VCGlr
public final static int BUBBLE = 2; )#.<]&P}
public final static int SELECTION = 3; jgbLN/_{
public final static int SHELL = 4; G>wqt@%r9
public final static int QUICK = 5; twP,cyR
public final static int IMPROVED_QUICK = 6; Fb^:V4<T
public final static int MERGE = 7; RnhL< Ywu
public final static int IMPROVED_MERGE = 8; }RmU%IYc
public final static int HEAP = 9; kD*2~Z?;
Ys@}3\Mc
public static void sort(int[] data) { an|x$e7|?
sort(data, IMPROVED_QUICK); p8Q,@ql.
} HR ;)|j{!
private static String[] name={ )^4\,u\@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T(e!_VY|m
}; 3T"j)R_=l
> `n,S
private static Sort[] impl=new Sort[]{ m\$\ 09
new InsertSort(), &m|wH4\
new BubbleSort(), v1%uxthW
new SelectionSort(), g{8,Wx,,
new ShellSort(), 1jN-4&
new QuickSort(), hg+X(0
new ImprovedQuickSort(), UG)8D5
new MergeSort(), QS{1CC9$
new ImprovedMergeSort(), W0epAGrB
new HeapSort() 3~}uqaGt
}; T{Sb^-H#X
/RHo1
public static String toString(int algorithm){ TQx.KM>y
return name[algorithm-1]; oXxCXO,q
} H2um|6>
}RHn)}+
public static void sort(int[] data, int algorithm) { LUC4=kk4
impl[algorithm-1].sort(data); ^j".
} L5#P[cHzz
E_8\f_%wK
public static interface Sort { ]@uE#a:[
public void sort(int[] data); |g #K]v
} ^go7_y
:E>HE,1b+
public static void swap(int[] data, int i, int j) { 8"dv_`ym
int temp = data; q~3,yyu
data = data[j]; dl~%MWAVb
data[j] = temp; ?gJy3@D
} 6`]$qSTS
} A8pIs