[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; DTx!# [
} o)B`K."
int i1=l; v,eTDgw
int i2=mid+1; O>vbAIu
for(int cur=l;cur<=r;cur++){ tMy<MO)Ei
if(i1==mid+1) e6 &-f
data[cur]=temp[i2++]; sJ3O ]
else if(i2>r) 0`H)c) pP
data[cur]=temp[i1++]; eV"Za.a.
else if(temp[i1] data[cur]=temp[i1++]; kO)+%'L!8
else W]TO%x{
data[cur]=temp[i2++]; Id(wY$C&>
} HNMVs]/e
} S7(Vc H
{J[5 {]Je[
} 0b3z(x!O
7,v}Ap]Pa
改进后的归并排序: ?7eD<|
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package org.rut.util.algorithm.support; I k[{,p
' K\ $B_
import org.rut.util.algorithm.SortUtil; d*cAm$
ZC!GKWP2
/** ^q@6((O
* @author treeroot )@hG#KMK
* @since 2006-2-2 _T^+BUw
* @version 1.0 n !oxwA!
*/ Cg]Iz<<bE
public class ImprovedMergeSort implements SortUtil.Sort { r5s$#,O/&Q
{=Y3[
private static final int THRESHOLD = 10; Vi:<W0:
)a;ou>u
/* KD(}-zUs
* (non-Javadoc) <\6<-x(H5
* .29y3}[PO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tR{@NFUcu
*/ $LXz Q>w9
public void sort(int[] data) { }i\U,mH0_&
int[] temp=new int[data.length]; $%GW~|S\C
mergeSort(data,temp,0,data.length-1); J;R1OJs S
} m Bc2x8g)
15)y]N={^
private void mergeSort(int[] data, int[] temp, int l, int r) { }$wWX}@
int i, j, k; dU<qFxW
int mid = (l + r) / 2; "4Bk
if (l == r) \~4IOu
return; +#wh`9[wBt
if ((mid - l) >= THRESHOLD) H%&e[PU
mergeSort(data, temp, l, mid); 24; BY'
else gQ8FjL6?
insertSort(data, l, mid - l + 1); 4r+s" |
if ((r - mid) > THRESHOLD) &X%vp?p
mergeSort(data, temp, mid + 1, r); E4;@P']`
else :,~]R,tJQ
insertSort(data, mid + 1, r - mid); 7wA.:$
5;4bZ3e,0
for (i = l; i <= mid; i++) { O)EA2`)E
temp = data; Ug~]!L
} m,1Hlp
for (j = 1; j <= r - mid; j++) { AzlZe\V?)~
temp[r - j + 1] = data[j + mid]; um}%<Cy[
} Z<ABK`rEO
int a = temp[l]; R>#BJ^>=
int b = temp[r]; mu/GOEZ5
for (i = l, j = r, k = l; k <= r; k++) { ?V9Da;cj
if (a < b) { r,FPTf
data[k] = temp[i++]; qHtonJc
a = temp; Q"VS;uh.v
} else { ))xyaYIZkk
data[k] = temp[j--]; lij>u
b = temp[j]; l+!eC lM%
} 5p]Cwj<u
} wiE'6CM
} DX\|*:,
tUXly|k
/** Q.zE}ZS
* @param data \(g/::|
* @param l %c`P`~sp
* @param i 3;t{V$
*/ 'G>gNq
private void insertSort(int[] data, int start, int len) { (h$[g"8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i7#PYt
} Q}qw`L1
} 9=FqI50{
} qwd7vYBc,
} M0$wTmXM
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堆排序： MjrI0@R
Pr_$%x9D
package org.rut.util.algorithm.support; a|u&N:v7B
&'{?Y;A
import org.rut.util.algorithm.SortUtil; }r _d{nhi
:u4q.^&!e
/** a"Q>K7K
* @author treeroot Kx<T;iJ}
* @since 2006-2-2 <GRplkf`
* @version 1.0 8+=-!":]
*/ QH]G>+LI5
public class HeapSort implements SortUtil.Sort{ wSGW_{;-
.`; bQh'!
/* (non-Javadoc) F&[MyXU4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3~5%6`
*/ 7LZA!3
public void sort(int[] data) { I4RUXi 5
MaxHeap h=new MaxHeap(); |vVcO
h.init(data); M tD{/.D>
for(int i=0;i h.remove(); V#-\ 4`c
System.arraycopy(h.queue,1,data,0,data.length); >mXq= 9L4
} yG~7Xo5
wrJ:jTh
private static class MaxHeap{ 6:$+"@ps
zh60b{
void init(int[] data){ 079mn/8;
this.queue=new int[data.length+1]; "eOFp\vPr
for(int i=0;i queue[++size]=data; bayDdR4T
fixUp(size); E!SxO~
} 2z+-vT%
} \7elqX`.yY
fk!P#
private int size=0; g$a 5
'|~L9t
private int[] queue; YVT\@+C'
%!HBPLk
public int get() { 3^x C=++
return queue[1]; 66jL2XU<
} HgfeSH
uu`G<n
public void remove() { oD?c]}3
SortUtil.swap(queue,1,size--); }bM=)eUfX
fixDown(1); zmdu\:_X9
} Hs>|-iDs(
file://fixdown 9%MHIY5
private void fixDown(int k) { S#g=;hD
int j; g]a5%8*{
while ((j = k << 1) <= size) { .Km6 (U
if (j < size %26amp;%26amp; queue[j] j++; >?yxig:_
if (queue[k]>queue[j]) file://不用交换 9 U!-Zn!
break; /~nPPC
SortUtil.swap(queue,j,k); ?VaAVxd29
k = j; >||=#;
} +w(>UBy-
} aH(B}wh{
private void fixUp(int k) { Y%"73.x
while (k > 1) { }+3v5Nz;
int j = k >> 1; tJgo%P1
if (queue[j]>queue[k]) @Q#<-/
break; ,'>,N/JA
SortUtil.swap(queue,j,k); 3<vw#]yL
k = j; n |Is&fy
} )cUFb:D*"
} '$m uA\
8<X,6
} !hS~\+E
5L%\rH&N
} s J~WzQ
E>2~cC*
SortUtil： hnD=DLW $
<-avC/M$d
package org.rut.util.algorithm; h|OsT
Gj9WUv[P
import org.rut.util.algorithm.support.BubbleSort; WK)2/$7@
import org.rut.util.algorithm.support.HeapSort; ;E0aTV)Zp
import org.rut.util.algorithm.support.ImprovedMergeSort; :3$$PdZ
import org.rut.util.algorithm.support.ImprovedQuickSort; c(5r
import org.rut.util.algorithm.support.InsertSort; fBZAO
import org.rut.util.algorithm.support.MergeSort; <~ 9a3c?
import org.rut.util.algorithm.support.QuickSort; nPh|rW=
import org.rut.util.algorithm.support.SelectionSort; ER4j=O#
import org.rut.util.algorithm.support.ShellSort; `:&jbd4H
B^yA+&3HI
/** Cg4l*"_
* @author treeroot }US^GEs(
* @since 2006-2-2 "PhP1;A9,
* @version 1.0 xfsf
*/ L28DBjE)A
public class SortUtil { 64jFbbd-/
public final static int INSERT = 1; O>)Fl42IeD
public final static int BUBBLE = 2; p.50BcDg
public final static int SELECTION = 3; SuuLB6{u3
public final static int SHELL = 4; d>OLnG> F
public final static int QUICK = 5; `L#`WC@[o
public final static int IMPROVED_QUICK = 6; !`$xN~_
public final static int MERGE = 7; :,]*~Nl
public final static int IMPROVED_MERGE = 8; t=B>t S.hO
public final static int HEAP = 9; }63Qh}_Y
QW[ gDc
public static void sort(int[] data) { I&lb5'6D
sort(data, IMPROVED_QUICK); {!G
} kl/eJN'S
private static String[] name={ Z#nPn>,q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [(65^Zl`
}; 8kA2.pIk
=k+nC)e
private static Sort[] impl=new Sort[]{ xLp<G(;
new InsertSort(), -Nn@c|fz
new BubbleSort(), YB&b_On,f
new SelectionSort(), 'Bc{N^
new ShellSort(), %D9,Femt
new QuickSort(), +T|M U
new ImprovedQuickSort(), P g{/tMY
new MergeSort(), A.@/~\
new ImprovedMergeSort(), +^0Q~>=VD
new HeapSort() riuG,$EX
}; Utv#E.VI
[>^xMF]$2
public static String toString(int algorithm){ %n7Y5|Uh
return name[algorithm-1]; 3LK]VuZE
} ^xZo.P
T)Ohk(jK1
public static void sort(int[] data, int algorithm) { VGDds
impl[algorithm-1].sort(data); %hnv go:^g
} gp`H>Sn.|
m.|__L
public static interface Sort { md.#n
public void sort(int[] data); @s[Vtw%f
} #Y9'n0 AL
qT}AY.O%^
public static void swap(int[] data, int i, int j) { ZA>p~Zt
int temp = data; Yc]
data = data[j]; (}jYi*B
data[j] = temp; W:z?w2{VI(
} `5$B"p&i
} *RpBKm&^7