[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; $9i5<16
} ;?lM|kK
int i1=l; F",abp!
int i2=mid+1; 7fzyD
for(int cur=l;cur<=r;cur++){ oJ@PJvmR&a
if(i1==mid+1) 5 EuJ
data[cur]=temp[i2++]; 8Y0<lfG
else if(i2>r) pnA]@FW
data[cur]=temp[i1++]; WmVw>.]@~
else if(temp[i1] data[cur]=temp[i1++]; n#4J]Z@
else 0l1]QD+Gc5
data[cur]=temp[i2++]; ,WDAcQ8\
} muX4Y1M_
} 5WJkeG ba
:kx#];2i
} 4b(irDT3F
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改进后的归并排序: zT-"kK
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package org.rut.util.algorithm.support; =]xk-MY"|R
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import org.rut.util.algorithm.SortUtil; >(6\ C
rnhf(K.{3
/** 75}u D
* @author treeroot e/Oj T
* @since 2006-2-2 kt3#_d^El
* @version 1.0 KP7RrgOan&
*/ ?ZV0
public class ImprovedMergeSort implements SortUtil.Sort { ^oB1 &G
8v=47G
private static final int THRESHOLD = 10; IC-xCzR
f>+}U;)EF
/* wG?kcfu
* (non-Javadoc) JiLrwPex[
* @?=)}2=|?i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kJeOlO[
*/ U1|4vd9
public void sort(int[] data) { c^WBB$v
int[] temp=new int[data.length]; '*ICGKoT
mergeSort(data,temp,0,data.length-1); f-nC+
} FC(cXPX}
=+=|{l?F
private void mergeSort(int[] data, int[] temp, int l, int r) { RH4n0=2
int i, j, k; DJ[#H
int mid = (l + r) / 2; U(]5U^
if (l == r) ,$qs9b~
return; :(p rx
if ((mid - l) >= THRESHOLD) <({eOh5N
mergeSort(data, temp, l, mid); {]Iu">*
else U`p<lxRgQ
insertSort(data, l, mid - l + 1); _w/N[E
if ((r - mid) > THRESHOLD) *!Y3N<>!
mergeSort(data, temp, mid + 1, r); JI,hy <3l0
else .*f4e3
insertSort(data, mid + 1, r - mid); #R PB;#{
L0VR(
for (i = l; i <= mid; i++) { ?HyioLO
temp = data; "#k(V=y
} &8i{'k,l
for (j = 1; j <= r - mid; j++) { {=4:Tgw
temp[r - j + 1] = data[j + mid]; q8bS@\i
} 4KSN;G
int a = temp[l]; FH21mwV
int b = temp[r]; J<*Mk
for (i = l, j = r, k = l; k <= r; k++) { MNmQ%R4jRN
if (a < b) { 9k^=m)yS'
data[k] = temp[i++]; iC+H;s5<
a = temp; "wC5hj]
} else { a&VJYAB
data[k] = temp[j--]; HbSx}bM_9
b = temp[j]; K$5P_~;QL
} `gs,JJ6N
} Ru aJ9O
} SfFR
F^G`Jf
/** DmPsltpzQ
* @param data 64X#:t+
* @param l :Qp/3(g e
* @param i 3A}8?
*/ Du4#\OK
private void insertSort(int[] data, int start, int len) { ^Jc0c)*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6b01xu(A[
} r3vj o(
} XRz6Yf(/
} ^ 6|"=+cO\
} \)uad5`N
SZD2'UaG
堆排序： 1AV1W_"
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package org.rut.util.algorithm.support; r8>?-P
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import org.rut.util.algorithm.SortUtil; 1H 6Wrik
kDa#yN\
/** +rP<m
* @author treeroot k $&A
* @since 2006-2-2 <ijmkNVS
* @version 1.0 Z[bC@y[Wb
*/ K3D $ hb
public class HeapSort implements SortUtil.Sort{ '+zsj0!A
ahv=HWX k
/* (non-Javadoc) oA@^N4PD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mXaUWgO
*/ @+#p:sE
public void sort(int[] data) { .WE0T|qDX
MaxHeap h=new MaxHeap(); ;_&L^)~P$
h.init(data); &L~rq)r/&
for(int i=0;i h.remove(); ?.ihWbW_
System.arraycopy(h.queue,1,data,0,data.length); >G~;2K[
} MA6%g} o
obolDha
private static class MaxHeap{ E_rC"_Zte
C8q-gP[
void init(int[] data){ 8!>pFVNJf
this.queue=new int[data.length+1]; 6D(m8
for(int i=0;i queue[++size]=data; ,sl.:C4
fixUp(size); 6 74X)hB
} Qf]!K6eR
} rWqA)j*!
m/nn}+*C
private int size=0; $?{zV$r1
CI'5JOqP
private int[] queue; E/;YhFb[
\c}r6xOr
public int get() { j=S"KVp9NF
return queue[1]; wJkkc9Rh'(
} 2]ljm]\l
)^sfEYoA
public void remove() { u;g}N'"
SortUtil.swap(queue,1,size--); [rsAY&.
fixDown(1); )~(_[='
} yqI|BF`
file://fixdown ~A4WuA
private void fixDown(int k) { CNYchE,}
int j; ev >9P
while ((j = k << 1) <= size) { B ;$8<
if (j < size %26amp;%26amp; queue[j] j++; &,7(Wab
if (queue[k]>queue[j]) file://不用交换 m 0PF"(
break; oX,M;;Yq
SortUtil.swap(queue,j,k); i`L66uV
k = j; rnE'gH(V'
} Su#1yw>
} +-d>Sl (
private void fixUp(int k) { Cz)D3Df^
while (k > 1) { ^yTN(\9
int j = k >> 1; U$bM:d
if (queue[j]>queue[k]) )wd~639U
break; xRN$cZC
SortUtil.swap(queue,j,k); pE,BE%
k = j; PX)qA=4q
} ApB0)N
} W:J00rsv=`
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} xpwzzO*U
k<H&4Z)d9
} @("AkYPj
l !v#6#iq
SortUtil： v^G5 N)F
@oNrR$7
package org.rut.util.algorithm; ERjf.7)d
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import org.rut.util.algorithm.support.BubbleSort; E@KK\m \e
import org.rut.util.algorithm.support.HeapSort; lUd,-
import org.rut.util.algorithm.support.ImprovedMergeSort; hd-ds~ve
import org.rut.util.algorithm.support.ImprovedQuickSort; rC16?RovQ@
import org.rut.util.algorithm.support.InsertSort; -X \vB
import org.rut.util.algorithm.support.MergeSort; ]du~V?N
import org.rut.util.algorithm.support.QuickSort; H1M>60*
import org.rut.util.algorithm.support.SelectionSort; xd<68%Cn
import org.rut.util.algorithm.support.ShellSort; zu%pr95U
ta(x4fP_
/** gEu\X|7'
* @author treeroot \O~7X0 <W
* @since 2006-2-2 6}$cDk`dz
* @version 1.0 ' M!_k+e
*/ Xy+|D#b
public class SortUtil { B#yyO>0k]
public final static int INSERT = 1; dX=^>9hN/
public final static int BUBBLE = 2; qFk(UazN
public final static int SELECTION = 3; is$d<Y&F
public final static int SHELL = 4; m<4Lo0?nS
public final static int QUICK = 5; ZxWV,s&p
public final static int IMPROVED_QUICK = 6; Op{Mc$5a
public final static int MERGE = 7; $@Fj_ N
public final static int IMPROVED_MERGE = 8; ."O(Ig[
public final static int HEAP = 9; ,e,{6Sg6gl
)Be;Zw.|
public static void sort(int[] data) { \Y$NGB=2[
sort(data, IMPROVED_QUICK); ):@B1 yR
} QR)eJ5<
private static String[] name={ -(EqBr@_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :JYOC+#q7
}; ] W_T(C*
OHw6#N$\
private static Sort[] impl=new Sort[]{ 9'M_tMm5
new InsertSort(), d?n~9_9e
new BubbleSort(), =g:\R$lQ
new SelectionSort(), jg(A_V
new ShellSort(), ->(B:Cz
new QuickSort(), zqkmsFH{
new ImprovedQuickSort(), 1Rh&04O>VL
new MergeSort(), tJP(eaqZ
new ImprovedMergeSort(), y(A"g3^=
new HeapSort() j3><J
}; LmE-&
A5b}G
public static String toString(int algorithm){ 8TZe=sD~cr
return name[algorithm-1]; x@=7M'vr%
} J,7\/O(`A
vY6|V$
public static void sort(int[] data, int algorithm) { uu>g(q?4II
impl[algorithm-1].sort(data); a4yU[KK
} NO1PGen
s5HbuyR^
public static interface Sort { 7^F?key?
public void sort(int[] data); /<@tbZJ*8
} !IS,[
c LJCLKJ
public static void swap(int[] data, int i, int j) { 'zaB5d~l
int temp = data; ]2jnY&a5
data = data[j]; G r)+O
data[j] = temp; ]rS+v^@QH
} C1J'. !
} sAb|]Q((