[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; F%Umau*1
} =z1o}ga=EA
int i1=l; m$mY<Q
int i2=mid+1; k5QD5/Ej
for(int cur=l;cur<=r;cur++){ 'oZn<c`
if(i1==mid+1) kJi&9
data[cur]=temp[i2++]; tr9Y1vxo{
else if(i2>r) &9w%n
data[cur]=temp[i1++]; y<%.wM]-J
else if(temp[i1] data[cur]=temp[i1++]; )]?egw5l
else I5yd )72
data[cur]=temp[i2++]; I= h4s(
} 9'#.>Q>0=j
} ;AGs1j
3k*:B~1
} :CST!+)o
C1B3VG
改进后的归并排序: qvU$9cTY
G<-9U}~76
package org.rut.util.algorithm.support; yX.5Y|A<
d3=6MX[c
import org.rut.util.algorithm.SortUtil; (&S[R{=^j
4Re@QOZ
/** q\'P1~
* @author treeroot JRjMt-7H_
* @since 2006-2-2 C:GHP$/}
* @version 1.0 T~~[a|bLa
*/ z5&%T}$tJ
public class ImprovedMergeSort implements SortUtil.Sort { g;#KBxE
2C33;?M
private static final int THRESHOLD = 10; M|5]#2J_2
JlDDM %
/* >+jbMAYSq
* (non-Javadoc) acYoOW1G
* r>:L$_]L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *- IlF]
*/ RJ}yf|d-C
public void sort(int[] data) { fJ&<iD)6
int[] temp=new int[data.length]; [zTYiNa
mergeSort(data,temp,0,data.length-1); PMN2VzE4{
} 7hF,gl5
EOPS? @
private void mergeSort(int[] data, int[] temp, int l, int r) { t>6x)2,TC
int i, j, k; _{*$>1q
int mid = (l + r) / 2; @6YBK+"
if (l == r) Pm#x?1rAj
return; (o6[4( G
if ((mid - l) >= THRESHOLD) AJ?}Hel[0
mergeSort(data, temp, l, mid); E/8u'
else @>#{WI:"~
insertSort(data, l, mid - l + 1); e8ULf~I
if ((r - mid) > THRESHOLD) o~o6S=4,}
mergeSort(data, temp, mid + 1, r); cbu nq"
else NM1cyZ
insertSort(data, mid + 1, r - mid); C*EhexK,}
uO_,n
for (i = l; i <= mid; i++) { FJd8s*
temp = data; A|taP$%
} {GQ Aa
for (j = 1; j <= r - mid; j++) { 8>VI$
temp[r - j + 1] = data[j + mid]; [Zt# c C+
} uH ny ]
int a = temp[l]; !M]%8NTt2
int b = temp[r]; :,%J6Zh?
for (i = l, j = r, k = l; k <= r; k++) { Q@e*$<3
if (a < b) { >FY&-4+v
data[k] = temp[i++]; Z(LxB$^l[
a = temp; @!":(@3[
} else { |z#m
data[k] = temp[j--]; Iu-'o
b = temp[j]; ;h,R?mU
} ;-9zMbte:
} 8!uL-_Bn
} T@Ss&eGT2
VA=#0w
/** M2;%1^
* @param data Esz1uty
* @param l Q3BLL`W~
* @param i 9QC"Od9H
*/ Y/^[qD
private void insertSort(int[] data, int start, int len) { |.Nr.4Yp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); RP~vB#}
} 1#>&p%P!
} J@ktj(
} Z:UgozdC
} 5?3Isw`v2
5 Q6{(q|M
堆排序： MK-a$~<
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package org.rut.util.algorithm.support; YeRcf`
}>{ L#JW
import org.rut.util.algorithm.SortUtil; om".j
` $.X[\*U
/** `z3|M#r\;
* @author treeroot $ DDSN
* @since 2006-2-2 } g3HoFC
* @version 1.0 QmH/yy3.%
*/ qE#&)
public class HeapSort implements SortUtil.Sort{ qPXANx<^
zdLVxL>87
/* (non-Javadoc) 2I]]WBW#:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rV8(ia
*/ |'U,/
public void sort(int[] data) { ";)r*UgR{B
MaxHeap h=new MaxHeap(); &\[Qm{lN
h.init(data); I%;Rn:zl
for(int i=0;i h.remove(); ``(}4a
System.arraycopy(h.queue,1,data,0,data.length); [^?13xMb
} UOR _M5
!y>lOw})Q
private static class MaxHeap{ yfSiByU
DC$7B`#D
void init(int[] data){ <S\;k@f
this.queue=new int[data.length+1]; wUru1_zjO
for(int i=0;i queue[++size]=data; Ud>`@2
fixUp(size); !sg%6H?}
} HCX!P4Hj
} j}|N^A_ S
`"xk,fVYd
private int size=0; xZ^ywa_
51o@b
private int[] queue; S}zC3
PU^[HC*K
public int get() { _-@ZOhw&
return queue[1]; n\Z^K
} tv 4s12&
Fy 4Tvg
public void remove() { *oEv,I_
SortUtil.swap(queue,1,size--); /J1S@-
fixDown(1); 9M1a*frxZ
} ((-aC`
file://fixdown -;+m%"k5
private void fixDown(int k) { X!U]`Qh
int j; _wm~}_Q
while ((j = k << 1) <= size) { -/M9 vS
if (j < size %26amp;%26amp; queue[j] j++; 9Tzc(yCY
if (queue[k]>queue[j]) file://不用交换 "NxOOLL
break; J*}VV9H
SortUtil.swap(queue,j,k); i'Y-V]->
k = j; <8iYL`3
} g/OI|1a
} Xy[}Gp
private void fixUp(int k) { Z -pyFK\
while (k > 1) { jmRhAJV
int j = k >> 1; kjx>
if (queue[j]>queue[k]) @AvM
break; .>k=A|3G
SortUtil.swap(queue,j,k); AU0$A403
k = j; Q8 -3RgAw
} Ezi' 2Sc
} "I5uDFZR&
rQ=xcn[A
} OF-E6bc
w>v5oy8s-
} D35m5+=I
M]J[6EW
SortUtil： h^['rmd
9TqnzD
package org.rut.util.algorithm; W=~id"XtJ
"w;08TX8
import org.rut.util.algorithm.support.BubbleSort; M_tj7Q3 W
import org.rut.util.algorithm.support.HeapSort; vAi"$e
import org.rut.util.algorithm.support.ImprovedMergeSort; vz6SCGg,
import org.rut.util.algorithm.support.ImprovedQuickSort; JR/W9i
import org.rut.util.algorithm.support.InsertSort; ktN%!Mh\
import org.rut.util.algorithm.support.MergeSort; b+W)2rFO
import org.rut.util.algorithm.support.QuickSort; ah 4kA LO
import org.rut.util.algorithm.support.SelectionSort; *]FgfttES
import org.rut.util.algorithm.support.ShellSort; 'n>K^rA
$X`bm*
/** Mg#`t$u
* @author treeroot U%Dit
* @since 2006-2-2 j -#E?&2
* @version 1.0 vZ:G8K)o(
*/ w-J"zC
public class SortUtil { <H<!ht%q3
public final static int INSERT = 1; \.5F](:
public final static int BUBBLE = 2; :]EP@.(
public final static int SELECTION = 3; =\M)6"}y}
public final static int SHELL = 4; }bZ 8-v
public final static int QUICK = 5; j0AwL7
public final static int IMPROVED_QUICK = 6; VxNXd?
public final static int MERGE = 7; uH$oGY
public final static int IMPROVED_MERGE = 8; aZP2R"
public final static int HEAP = 9; z|uOJ0uK
]n~yp5Nbr
public static void sort(int[] data) { eUYZxe :6
sort(data, IMPROVED_QUICK); P=2wkzeJj
} w(/7Jt$
private static String[] name={ Og+)J9#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >Q&CgGpW$
}; b~1iPaIh
ya#RII']
private static Sort[] impl=new Sort[]{ iA]DE`S
new InsertSort(), n4Vwao/9x
new BubbleSort(), 64SW
new SelectionSort(), \e_IFISC
new ShellSort(), {JXf*IJ
new QuickSort(), kl=xu3j
new ImprovedQuickSort(), dQ,Q+ON>
new MergeSort(), N5yJ'i~,M
new ImprovedMergeSort(), Qy/uB$q{A
new HeapSort() #kj~G]QA
}; )5U!>,fT
L"4]Tm>zq
public static String toString(int algorithm){ \Ps5H5Qk;
return name[algorithm-1]; VDG|>#[!
} &0s*PG
lbd(j{h>4
public static void sort(int[] data, int algorithm) { H*GlWgfG
impl[algorithm-1].sort(data); w:v=se"U
} f#1/}Hq/I
{y1q7Z.M
public static interface Sort { b(/j\NWC
public void sort(int[] data); 3+e4e
} 5PDSA*
,}KwP*:Z
public static void swap(int[] data, int i, int j) { |hc\jb
int temp = data; l(#1mY5!q8
data = data[j]; grc:Y
data[j] = temp; >}CEN
} @`6}`k
} X6'H`E[