[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; :&SvjJR
} p G|-<6WY
int i1=l; ~EIK
int i2=mid+1; z`g4<
for(int cur=l;cur<=r;cur++){ V /i~IG`h/
if(i1==mid+1) cPaz-
data[cur]=temp[i2++]; 9dS<^E(ZF
else if(i2>r) cdd6*+E
data[cur]=temp[i1++]; 6sceymq
else if(temp[i1] data[cur]=temp[i1++]; p+x}$&<|
else 6=N!()s
data[cur]=temp[i2++]; RJ}%pA4I
} yM,.{m@F<
} .-ihxEbzr
qmmQHS
} ^.3(o{g
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改进后的归并排序: U$,-F**
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package org.rut.util.algorithm.support; B:mtl?69g
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import org.rut.util.algorithm.SortUtil; +az=EF
!AR@GuQPE
/** vciO={M
* @author treeroot d23;c )'
* @since 2006-2-2 aI.5w9
* @version 1.0 Z7]["
*/ M=rH*w{^
public class ImprovedMergeSort implements SortUtil.Sort { <n4?wo
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private static final int THRESHOLD = 10; uuaoBf
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/* A4K8DP
* (non-Javadoc) y26?>.!
* gn-@OmIs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hl}iw_e
*/ 1&Z#$iD
public void sort(int[] data) { ] 6Y6q])Z
int[] temp=new int[data.length]; x)+ q$FB
mergeSort(data,temp,0,data.length-1); " fXs!
} N1D{ %
!)r1zSY"g
private void mergeSort(int[] data, int[] temp, int l, int r) { pNFVa<D
int i, j, k; DhVO}g)2#
int mid = (l + r) / 2; q%S^3C&
if (l == r) aHR+4m~)
return; w;b;rHAZ\
if ((mid - l) >= THRESHOLD) (e"\%p`
mergeSort(data, temp, l, mid); P>}OwW
else bU4l|i;j
insertSort(data, l, mid - l + 1); %ztv.K(8
if ((r - mid) > THRESHOLD) ]0o_- NI
mergeSort(data, temp, mid + 1, r); TI5<' U)
else tD^$}u6
insertSort(data, mid + 1, r - mid); 0{^ 0>H0
qtR/K=^i
for (i = l; i <= mid; i++) { )U|0vr8:
temp = data; g:oB j6$ q
} j{$2.W$
for (j = 1; j <= r - mid; j++) { E"<-To
temp[r - j + 1] = data[j + mid]; <`)vp0
} 2#81oz&K
int a = temp[l]; ~J:qG9|]}
int b = temp[r]; zhZ!!b^6<
for (i = l, j = r, k = l; k <= r; k++) { A)9F_;BY
if (a < b) { `g+Kv&546
data[k] = temp[i++]; rtxG-a56Q
a = temp; \yhj{QS.k
} else { 1xTNrLW
data[k] = temp[j--]; FZBdQhYF
b = temp[j]; % `\}#
} pqF!1
} P=<>H9p:o
} c BcZ@e;
STjk<DP(
/** yedEI[_4
* @param data dKpUw9C#/
* @param l xLShMv}
* @param i +\x}1bNS%j
*/ $y_P14
private void insertSort(int[] data, int start, int len) { 2{|mL`$04<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C2;Hugm4
} Y3.^a5o
} /Ue_1Efa
} 3D-VePM=`
} &gdhq~4#
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堆排序： GZ1c~uAu
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package org.rut.util.algorithm.support; PfN[)s4F{R
':d9FzGKa
import org.rut.util.algorithm.SortUtil; cGM?r}zJ
YZy%]i=1
/** 2TccIv
* @author treeroot E#n=aY~u-
* @since 2006-2-2 /?%1;s:'
* @version 1.0 *v#Z/RrrA
*/ T+j-MR}{\
public class HeapSort implements SortUtil.Sort{ VQ7A"&hh
rI#,FZ
/* (non-Javadoc) cU_:l.b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) duV\Kt/g^
*/ 4?33t] "
public void sort(int[] data) { #_kV o3
MaxHeap h=new MaxHeap(); '/F% ff
h.init(data); 2-dEie/{'
for(int i=0;i h.remove(); ja&S^B^@
System.arraycopy(h.queue,1,data,0,data.length); /5Tp)h|
} PiJ>gDx
\C kb:
private static class MaxHeap{ M@=VIrX,m
_/z3QG{Ea^
void init(int[] data){ Hrg -5_
this.queue=new int[data.length+1]; 19;Pjo8
for(int i=0;i queue[++size]=data; )mu[ye"p
fixUp(size); BIxjY!!"
} H;N6X y*~
} y:YJv x6&4
q0*d*j F0u
private int size=0; F;8Uvj
x31Jl{x8\?
private int[] queue; .23Yqr'zT
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public int get() { wBz5_ OFVw
return queue[1]; m't8\fo^w
} rm%MQmF
534DAhpD=.
public void remove() { ZC97Z sE
SortUtil.swap(queue,1,size--); cD'|zH]
fixDown(1); 8,L)=3m-
} 4W<8u(
file://fixdown 7OD2/{]5
private void fixDown(int k) { &?*H`5#?G
int j; i#I7ncX
while ((j = k << 1) <= size) { hQ}y(2A.XI
if (j < size %26amp;%26amp; queue[j] j++; TG6E^3a P
if (queue[k]>queue[j]) file://不用交换 Qe;R3D=T;
break; .R_-$/ZP
SortUtil.swap(queue,j,k); cH`ziZ<&m1
k = j; UIo jXR<
} )Ec /5=A
} E`#/m@:|-
private void fixUp(int k) { @n;$Edza/
while (k > 1) { jJ3dZ<#
int j = k >> 1; u}|+p+
if (queue[j]>queue[k]) ozkmZ;
break; |3C5"R3ZGO
SortUtil.swap(queue,j,k); W3A9uk6
k = j; 5@^['S4%8*
} @VyF' ?}
} E:[!)UG|y
5UX-Qqr
} Tq?f5swsI
mRN[lj
} tg<bVA)E'J
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SortUtil： U*XdFH}vV
<[=[|DS l
package org.rut.util.algorithm; 8C*xrg#g:
sXYXBX[
import org.rut.util.algorithm.support.BubbleSort; 5C9 .h:c4y
import org.rut.util.algorithm.support.HeapSort; rS+ >oP}
import org.rut.util.algorithm.support.ImprovedMergeSort; "![KQ
import org.rut.util.algorithm.support.ImprovedQuickSort; uE>m3Y(aP
import org.rut.util.algorithm.support.InsertSort; TCi0]Y~a
import org.rut.util.algorithm.support.MergeSort; }%<cFi &
import org.rut.util.algorithm.support.QuickSort; -s^cy+jd
import org.rut.util.algorithm.support.SelectionSort; !uA'0U?ky
import org.rut.util.algorithm.support.ShellSort; c?6(mU\x
+~7[T/v+n
/** i_nUyH%b
* @author treeroot `%~f5<
* @since 2006-2-2 Z7 ++c<|p
* @version 1.0 b,47 EJ}
*/ 3TN'1D ei
public class SortUtil { Jg$ NYs.xZ
public final static int INSERT = 1; TN/&^/
public final static int BUBBLE = 2; e}s,WC2-
public final static int SELECTION = 3; -CALUX
public final static int SHELL = 4; F*Ul#yX
public final static int QUICK = 5; AjsjYThV
public final static int IMPROVED_QUICK = 6; CY"i|s
public final static int MERGE = 7; JB!*{{
public final static int IMPROVED_MERGE = 8; xXJzE|)1h!
public final static int HEAP = 9; M>i *e
4-9cp=\PE
public static void sort(int[] data) { sosIu
sort(data, IMPROVED_QUICK); kmt+E'^]
} B)dd6R>8
private static String[] name={ mS.!lkV
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" COd~H
}; -L2?Tap
U^-RyE!}
private static Sort[] impl=new Sort[]{ r l;Y7l
new InsertSort(), COD^osM@
new BubbleSort(), 2\gbciJ[{(
new SelectionSort(), (~(FQ:L%U
new ShellSort(), swMR+F#u*
new QuickSort(), 89W8cJ$yW
new ImprovedQuickSort(), >n1UK5QD
new MergeSort(), |=W>4>
new ImprovedMergeSort(), [P]M)vJ**
new HeapSort() Q[lkhx|.B
}; yKmHTjX=
3Q,p,
public static String toString(int algorithm){ McN'J.Sxp
return name[algorithm-1]; Rli`]~!w
} #t VGqf
9gZS)MZ
public static void sort(int[] data, int algorithm) { !_?HSDAj"n
impl[algorithm-1].sort(data); EPM(hxCIQ
} S-brV\v7
buHUBn[3)
public static interface Sort { !H @nAz
public void sort(int[] data); UaHN*@
} fUJe{C<H
5!6}g<z&L
public static void swap(int[] data, int i, int j) { Eb8z`@p
int temp = data; 5KssfI a
data = data[j]; luz,z( v
data[j] = temp; !m9g\8tE
} ~\zIb/ #
} _b &Aa%