[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; Pm7,Nq)<>n
} mNWmp_c,1
int i1=l; @H1pPr
int i2=mid+1; l J;wl|9
for(int cur=l;cur<=r;cur++){ L7%Dc2{^(
if(i1==mid+1) $2 ~A^#"0
data[cur]=temp[i2++]; >umcpkp-h
else if(i2>r) )Xl/|YD
data[cur]=temp[i1++]; VG q'
else if(temp[i1] data[cur]=temp[i1++]; y<8)mw
else R%8nR6iG"
data[cur]=temp[i2++]; 9I+;waLlB
} -:*PXu
} #B;`T[
-"<H$
} Yg<o 9x$
@C~TD)K
改进后的归并排序: N[){yaj
>c5Vz^uM{4
package org.rut.util.algorithm.support; LL#7oBJdM
qYGnebn@\
import org.rut.util.algorithm.SortUtil; MU-ie*+
cQ1oy-paD
/** ce1KUwo]
* @author treeroot :sk7`7v
* @since 2006-2-2 %:YON,1b=7
* @version 1.0 ;BejFcb
*/ VKS:d!}3E
public class ImprovedMergeSort implements SortUtil.Sort { `-qSvjX
8!4=j
private static final int THRESHOLD = 10; v^HDR 3I
?K|PM<A
/* K>w}(td
* (non-Javadoc) it D%sKo
* `i,ZwnLh{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %4imlP
*/ ORp6
public void sort(int[] data) { ZgZ}^x
int[] temp=new int[data.length]; .A&Ey5
mergeSort(data,temp,0,data.length-1); +2|X 7wA
} >"5^]o2?~l
QE=Cum
private void mergeSort(int[] data, int[] temp, int l, int r) { LV4x9?&
int i, j, k; E)NH6~
int mid = (l + r) / 2; B`T|M$Ug
if (l == r) W6E9
return; f/eT4y
if ((mid - l) >= THRESHOLD) Gxy>aS3
mergeSort(data, temp, l, mid); t \Fc <
else nxA]EFS
insertSort(data, l, mid - l + 1); vXq=f:y4
if ((r - mid) > THRESHOLD) PF1!aAvVb
mergeSort(data, temp, mid + 1, r); Kg~<h B6
else `a3q)}*Y
insertSort(data, mid + 1, r - mid); 3k5Mty
bxqXFy/I
for (i = l; i <= mid; i++) { F2AM/m^!q
temp = data; {ylc2 1
} J,4]du$
for (j = 1; j <= r - mid; j++) { |.*),t3 (w
temp[r - j + 1] = data[j + mid]; NA]7qb%%<
} ;]i&AAbj
int a = temp[l]; ]Qkto4DQ5
int b = temp[r]; !5?#^q
for (i = l, j = r, k = l; k <= r; k++) { nyw,Fu
if (a < b) { fP&F$"o8
data[k] = temp[i++]; d[kb]lC
a = temp; *P61q\2Z
} else { i"F'n0*L
data[k] = temp[j--]; +r2E5s
b = temp[j]; f8lBxK
} NQ'^z
} B5 C]4
} ?0DCjh8We
#fk)Y1
/** ,B5Ptf#
* @param data 0{BPT>'
* @param l ^ B=x-G.
* @param i <{[AG3/Zj4
*/ h<Yn0(.
private void insertSort(int[] data, int start, int len) { &oWWc$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Hm-+1Wx
} B(:Kw;r?
} 6pLB`1[v
} --Dw
} PC.$&x4w1
awHfd5nRS
堆排序： /A9Mv%zjk
nbMH:UY,J
package org.rut.util.algorithm.support; X']>b
_-o*3gmbQ
import org.rut.util.algorithm.SortUtil; wf=#w}f
@1*lmFq'kV
/** +LV'E#h!Q
* @author treeroot 2GqPS
* @since 2006-2-2 28f-8B
* @version 1.0 5caYA&R
*/ bsuUl*l)
public class HeapSort implements SortUtil.Sort{ p87s99
T 2x~fiM
/* (non-Javadoc) eG"iJ%I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q&<#)#+
*/ /quf'CV}
public void sort(int[] data) { :0CR=]WM
MaxHeap h=new MaxHeap(); R`76Ae`R8
h.init(data); d;mQ=k 1
for(int i=0;i h.remove(); p? iJ'K
System.arraycopy(h.queue,1,data,0,data.length); j72cSRv
} ;wL*
1.p?P] .
private static class MaxHeap{ ~9kvC&/{[
SjtGU47$!
void init(int[] data){ Rb#Z'1D'G
this.queue=new int[data.length+1]; {;n?c$r
for(int i=0;i queue[++size]=data; Ook3B
fixUp(size); 9`4h"9dO
} ,\+tvrR4X
} Gxi;h=J2)>
x3PeU_9
private int size=0; ii2oWU
\CUxGyu
private int[] queue; fOE:~3Q
pcur6:8W!
public int get() { c*RZbE9k
return queue[1]; K[~Wj8W0
} $#]?\psf
Qc[[@=S%
public void remove() { Yo| H`m,
SortUtil.swap(queue,1,size--); mH;Z_ME"
fixDown(1); iBp 71x65
} P^rSpS9
file://fixdown E0xUEAO
private void fixDown(int k) { Mky$#SI11
int j; ;f=:~go
while ((j = k << 1) <= size) { .7ahz8v
if (j < size %26amp;%26amp; queue[j] j++; u+I-!3J87
if (queue[k]>queue[j]) file://不用交换 {@Diig
break; gW/H#T,
SortUtil.swap(queue,j,k); ,=$yvZs4[]
k = j; _\@i&3hkx
} d2.n^Q"?3
} <Cg;l<$`b
private void fixUp(int k) { ]DmqhK`
while (k > 1) { Qbl6~>T
int j = k >> 1; W.MJyem
if (queue[j]>queue[k]) g+ 2SB5 2D
break; B susXW$
SortUtil.swap(queue,j,k); PO&xi9_
k = j; `c:'il?
} )Bb :tz+
} Gk[P-%%b /
a Q`a>&R0
} ;Ic3th%u
m+OR W"o
} $XyGCn
}Lb];hww1
SortUtil： Wv=L_E_
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package org.rut.util.algorithm; I=(O,*+PQ
:6HMb^4
import org.rut.util.algorithm.support.BubbleSort; JYv&It
import org.rut.util.algorithm.support.HeapSort; zE<vFP-1v
import org.rut.util.algorithm.support.ImprovedMergeSort; CvbY2_>Nh
import org.rut.util.algorithm.support.ImprovedQuickSort; ec=4L@V*
import org.rut.util.algorithm.support.InsertSort; HS(<wI
import org.rut.util.algorithm.support.MergeSort; y{j>4g$:z
import org.rut.util.algorithm.support.QuickSort; Qbv)(&i#~
import org.rut.util.algorithm.support.SelectionSort; Z NCq/
import org.rut.util.algorithm.support.ShellSort; zN2sipJS8
5VG@Q%
/** B@iIj<p~
* @author treeroot #y>oCB`EM
* @since 2006-2-2 cgz'6q'T
* @version 1.0 A]H+rxg
*/ ^<y$+HcH
public class SortUtil { 6\::Ku4_2
public final static int INSERT = 1; ^f<f&V
public final static int BUBBLE = 2; q8kt_&Ij
public final static int SELECTION = 3; "hy#L 0\t
public final static int SHELL = 4; cq[}>5*k
public final static int QUICK = 5; R`1$z8$
public final static int IMPROVED_QUICK = 6; zR{TWk]
public final static int MERGE = 7; gvcT_'
public final static int IMPROVED_MERGE = 8; nF=Ig-NX^
public final static int HEAP = 9; 4a!L/m*
>@oO7<WB
public static void sort(int[] data) { ?|s[/zPS=
sort(data, IMPROVED_QUICK); xFpJ#S&
} ^xqh!
private static String[] name={ c#Y9L+O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u{H_q&1
}; |ZZ3Qr+%S
&Q&$J )0
private static Sort[] impl=new Sort[]{ )9<)mV*EB(
new InsertSort(), m|f|u3'z$
new BubbleSort(), \[>Rt
new SelectionSort(), {|rwIRe
new ShellSort(), dDm<'30?*v
new QuickSort(), YDmFR,047
new ImprovedQuickSort(), *-P@|eg
new MergeSort(), B"Fg`s+]U
new ImprovedMergeSort(), -C8awtbC
new HeapSort() G 8NSBaZe
}; Pc4sReo'
)L#I#%
public static String toString(int algorithm){ 97Q!Rot
return name[algorithm-1]; 4e%SF|(Y'h
} %"KBX~3+Kj
~+T~}S
public static void sort(int[] data, int algorithm) { [xE\IqwM
impl[algorithm-1].sort(data); j;+nnpg
} 4p1{Ady
@NyCMe;]
public static interface Sort { r;Dl
public void sort(int[] data); ;- cq#8S
} wwpvmb
Wg$MKc9Vy[
public static void swap(int[] data, int i, int j) { pkxW19h*0
int temp = data; #D>8\#53V/
data = data[j]; |J6CH87>
data[j] = temp; 4Yn*q~f
} q-!m|<Z
} dvXu?F55