[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; Z;u3G4XlF
} N DI4EA~z
int i1=l; qoT&N,/
int i2=mid+1; Ymnh%wS
for(int cur=l;cur<=r;cur++){ EBWM8~Nm#
if(i1==mid+1) X?ZLmP7|
data[cur]=temp[i2++]; |ggtb\W
else if(i2>r) _lT'nFe=Q
data[cur]=temp[i1++]; 7uUq+dp
else if(temp[i1] data[cur]=temp[i1++]; *E>R1bJ8
else OP=oSfa
data[cur]=temp[i2++]; %Y/;jCY
} w|I5x}ZFG
} pi70^`@'B
1bz^$2/k
} '8R5Tl
Wd+kjI\
改进后的归并排序: s7jNRY V
,QA=)~;D
package org.rut.util.algorithm.support; %#EzZD
| h"$
import org.rut.util.algorithm.SortUtil; x~m$(LT
dA2@PKK
/** y_Gs_xg
* @author treeroot A#Ga!a
* @since 2006-2-2 <AJRU l
* @version 1.0 $t6t 6<M)
*/ oFt_ yU-
public class ImprovedMergeSort implements SortUtil.Sort { 0%|)=T3Slu
1NTx?JJfW
private static final int THRESHOLD = 10; <%|u1cn~!v
dB&<P[$+8
/* %k"hzjXAw
* (non-Javadoc) [%/B"wTt
* K0@bh/i/^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #K`[XA
*/ @QYCoEU8J
public void sort(int[] data) { BHkicb?
int[] temp=new int[data.length]; VY|UB7,C
mergeSort(data,temp,0,data.length-1); 1} _<qk9
} uVX,[%*P
vZ6R>f
private void mergeSort(int[] data, int[] temp, int l, int r) { g<w1d{Td
int i, j, k; +,i_G?eX
int mid = (l + r) / 2; n"~K",~P
if (l == r) r'|ei,
return; :2b*E`+
if ((mid - l) >= THRESHOLD) >*|Eyv_
mergeSort(data, temp, l, mid); b ts*qx&)
else zQGj,EAM}
insertSort(data, l, mid - l + 1); z,!A4ws
if ((r - mid) > THRESHOLD) 4VA]S
mergeSort(data, temp, mid + 1, r); 96gaun J
else f7%g=0.F
insertSort(data, mid + 1, r - mid); h-m0Ro?6
QdD@[
for (i = l; i <= mid; i++) { ep l1xfr
temp = data; -l"8L;`
} 6hFs{P7
for (j = 1; j <= r - mid; j++) { ~jWpD7px
temp[r - j + 1] = data[j + mid]; bDegIW/'w
} e&mTaCLG
int a = temp[l]; V* ,u;*
int b = temp[r]; E/d\ebX|
for (i = l, j = r, k = l; k <= r; k++) { pQm-Hr78j
if (a < b) { a uve&y"R
data[k] = temp[i++]; G<~P||Lu^
a = temp; I%0J=V;o{
} else { `ih#>i_&
data[k] = temp[j--]; '?E@H.""
b = temp[j]; *m6*sIR
} n8&x=Z}Xs
} ~}G#ys\1
} 6x@]b>W
w#sP5qKv8
/** S~y.>X3"P
* @param data z+?48}
* @param l i_$?sg#=yk
* @param i 2bpFQ8q
*/ 7. eiM!7g
private void insertSort(int[] data, int start, int len) { h{PJ4U{W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); oIKuo~
} kChCo0Q>1
} uD`Z\@Z
} p"n3JV.~k+
} 9lX+?m~ ~
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堆排序： )Mw 3ZE92
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package org.rut.util.algorithm.support; T(*A0
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import org.rut.util.algorithm.SortUtil; S`[r]msw
d 4;
/** CDFkH
* @author treeroot 3>^S6h}o
* @since 2006-2-2 X*M--*0q'
* @version 1.0 ">R`S<W
*/ N*Xl0m(Q
public class HeapSort implements SortUtil.Sort{ /oU$TaB>(
StMvz~
/* (non-Javadoc) &_Gu'A({J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `?vI_>md'!
*/ V}t8H
public void sort(int[] data) { &."ltB
MaxHeap h=new MaxHeap(); elb}] +
h.init(data); l,E4h-$
for(int i=0;i h.remove(); +hMF\@
System.arraycopy(h.queue,1,data,0,data.length); bKPjxN?!9
} j!?bE3r~
]iiB|xT
private static class MaxHeap{ <``krPi
SQf.R%cg$
void init(int[] data){ )$E'2|Gm/
this.queue=new int[data.length+1]; LQa1p
for(int i=0;i queue[++size]=data; Z4PAdT
fixUp(size); [AAIBb+U
} M cbiO)@I
} qnU$Pd
2rX}A3%9^^
private int size=0; $ 4A!Y
wEbO|S+K1
private int[] queue; HAMps[D[
z_9qT"vF
public int get() { <p8>"~R
return queue[1]; 8'mm<BV;sT
} A-qpuI;f
4fdO Ow
public void remove() { '5SO3/{b
SortUtil.swap(queue,1,size--); 0:k MnHn\
fixDown(1); l`RFi)u~&
} }{ "RgT-qG
file://fixdown >U')ICD~
private void fixDown(int k) { A/*h[N+2!
int j; +8V|
while ((j = k << 1) <= size) { 1 ,4V8gp
if (j < size %26amp;%26amp; queue[j] j++; PhC{Gg
if (queue[k]>queue[j]) file://不用交换 fm^)u"
break; I KDh)Zm
SortUtil.swap(queue,j,k); wi-{&
k = j; q e;O Ox
} Jl^THoEL
} }WG -R
private void fixUp(int k) { U-:_4[
while (k > 1) { vD4<G{
int j = k >> 1; cdsF<tpy
if (queue[j]>queue[k]) >d#6qXKAU
break; 1'g{tP"d
SortUtil.swap(queue,j,k); 7_ah1IEK
k = j; xDBHnr}[
} wKs-<b%;
} 2T#>66^@q
@](\cT64i3
} f:K`MW
T@H2[ 7[;
} T~'9p`IW
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SortUtil： Ayi Uz
A4uDuB;;ZQ
package org.rut.util.algorithm; Sk,9<@
}D&fw=r"M
import org.rut.util.algorithm.support.BubbleSort; M.R]hI
import org.rut.util.algorithm.support.HeapSort; 0Ku%9wh-
import org.rut.util.algorithm.support.ImprovedMergeSort; ?*8HZ1m#
import org.rut.util.algorithm.support.ImprovedQuickSort; g$ oe00b
import org.rut.util.algorithm.support.InsertSort; U1^R+ *yp
import org.rut.util.algorithm.support.MergeSort; c;e2= A
import org.rut.util.algorithm.support.QuickSort; \3@AC7
import org.rut.util.algorithm.support.SelectionSort; p;rGaLo:u
import org.rut.util.algorithm.support.ShellSort; z~BrKdS
'qg q8
/** D;0xROW8{
* @author treeroot Soa5TM
* @since 2006-2-2 |O]oX[~
* @version 1.0 W<D(M.61A
*/ e r;3TG~
public class SortUtil { O$=)
public final static int INSERT = 1; ?=uw0~O[
public final static int BUBBLE = 2; txwTJScg
public final static int SELECTION = 3; ^f,('0p->
public final static int SHELL = 4; Y Hv85y
public final static int QUICK = 5; KD~F5aS`[
public final static int IMPROVED_QUICK = 6; E@_M|=p&
public final static int MERGE = 7; ,e ~@
public final static int IMPROVED_MERGE = 8; %8V/QimHU
public final static int HEAP = 9; df7z&{R
O$%C(n(
public static void sort(int[] data) { 9R"bo*RIS
sort(data, IMPROVED_QUICK); ),-4\!7
} 9J?G"JV?
private static String[] name={ }>:x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" gi7As$+E
}; pAV}hB
N3nk\)V\E
private static Sort[] impl=new Sort[]{ 'H`_Z e<
new InsertSort(), x=qACoq
new BubbleSort(), i%W,Y8\uf*
new SelectionSort(), 1!/ U#d"
new ShellSort(), 5}R/C{fs
new QuickSort(), 3X{=*wvt
new ImprovedQuickSort(), NdQXQa?,
new MergeSort(), id.o)=
new ImprovedMergeSort(), f#l/N%VoBZ
new HeapSort() 0n_Cuh\
}; C<6IiF[>%
=ot`V; Q>
public static String toString(int algorithm){ IrXC/?^h
return name[algorithm-1]; ,7pO-:*g
} %&^F.JTt\
VbtFM=Dg
public static void sort(int[] data, int algorithm) { doxQS ohS
impl[algorithm-1].sort(data); r! 5C3
} oj<.axA,
*kxk@(lT?
public static interface Sort { COj50t/
public void sort(int[] data); y-"*[5{W
} [6 !/
X63DBF4A
public static void swap(int[] data, int i, int j) { /+J?Ep(_
int temp = data; vdNh25a<h
data = data[j]; ~]A';xH&
data[j] = temp; ^$_a_ft#
} m7e$Z
} 0pu])[P]_[