[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; $*Ucfw1T
} ]P4WfV d
int i1=l; <Vat@e
int i2=mid+1; jh5QIZf=
for(int cur=l;cur<=r;cur++){ j#NyNv(jE1
if(i1==mid+1) ]%\,.&=hT
data[cur]=temp[i2++]; ,UNb#=it
else if(i2>r) D31X {dJ
data[cur]=temp[i1++]; uZqL'l+/y
else if(temp[i1] data[cur]=temp[i1++]; o`U}uqrO
else SeX]|?D
data[cur]=temp[i2++]; YW}$eW*
} W^(zP/
} vgfC{]v<W]
<I+kB^Er
} -t`kb*O3`
3]Z1kB
改进后的归并排序: 5E!C?dv(z
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package org.rut.util.algorithm.support; L*@`i ]jl
5{c;I<0
import org.rut.util.algorithm.SortUtil; cc@W 6W
|;ztK[(
/** (jc@8@Wo.
* @author treeroot lZFu|(
* @since 2006-2-2 ]l,BUf-O
* @version 1.0 L^J4wYFTO
*/ yx-{PjX
public class ImprovedMergeSort implements SortUtil.Sort { 7v: XAU
#M,&g{
private static final int THRESHOLD = 10; GkGiQf4hh
[FFr}\}bY
/* >O'\ jp}$l
* (non-Javadoc) -Q WvB
* Nx}nOm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DfXkLOGik
*/ v"*r %nCi
public void sort(int[] data) { f|[7LIdh-
int[] temp=new int[data.length]; bI):-2&s}
mergeSort(data,temp,0,data.length-1); iw@rW5%'~
} 0PzSp ]
aZ#FKp^8H
private void mergeSort(int[] data, int[] temp, int l, int r) { *?)MJ@
int i, j, k; m`yvZ4K!
int mid = (l + r) / 2; lriezI
if (l == r) n,N->t$i
return; -y`Pm8
if ((mid - l) >= THRESHOLD) Q*DT" W/0
mergeSort(data, temp, l, mid); c_/BS n
else ]RVu[k8
insertSort(data, l, mid - l + 1); |t,sK aL
if ((r - mid) > THRESHOLD) 7)?C+=,0
mergeSort(data, temp, mid + 1, r); <)qa{,GX\
else P1#g{f
insertSort(data, mid + 1, r - mid); 7Cz~nin>7
Yuv(4a<M%
for (i = l; i <= mid; i++) { G[64qhTC
temp = data; Gu;40)gm
} vYgJu-Sl
for (j = 1; j <= r - mid; j++) { TWP@\ BQ
temp[r - j + 1] = data[j + mid]; NdK`-RT
} WowKq0sn
int a = temp[l]; X3:1KDVsV
int b = temp[r]; o&JoeKXor
for (i = l, j = r, k = l; k <= r; k++) { 1+%UZK= K
if (a < b) { GM|&,}
data[k] = temp[i++]; ak7%
a = temp; c <TEA
} else { R|?n
data[k] = temp[j--]; j{C~wy!J
b = temp[j]; '}cSBbl&/n
} q<}IO
} 2;)IBvK
} 5Tn<
Bg|d2,im
/** fTxd8an{
* @param data ,='Ihi
* @param l Q Xd`P4a
* @param i *q}yfa35eR
*/ f6r!3y
private void insertSort(int[] data, int start, int len) { Tv%7=P;r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rCJ$Pl9R
} {$S"Sj
} [8u9q.IZ
} )U/Kz1U
} enk`I$Xx
N8]DzE0%
堆排序： %[XP}L$
jV% VN
package org.rut.util.algorithm.support; +9/K|SB{$
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import org.rut.util.algorithm.SortUtil; G}U <^]c
7[e-3
/** Q g/Rw4[
* @author treeroot S{llpp{E
* @since 2006-2-2 @5d^ C
* @version 1.0 gY+d[3N
*/ (-ELxshd
public class HeapSort implements SortUtil.Sort{ @@ j\OR
\7\sx:!$
/* (non-Javadoc) h<L_ =)lH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Up Z 9g"
*/ +*OAClt+]
public void sort(int[] data) { 7a[6@
MaxHeap h=new MaxHeap(); jd]L}%ax
h.init(data); "%K'~"S#Q,
for(int i=0;i h.remove(); V;^-EWNj
System.arraycopy(h.queue,1,data,0,data.length); OcB&6!1u
} 0L;,\&*u
@Ez>?#z
private static class MaxHeap{ {~&]
r@JMf)a]
void init(int[] data){ oW OR7)?r
this.queue=new int[data.length+1]; R(t%/Hvs$
for(int i=0;i queue[++size]=data; e@c8Ce|0
fixUp(size); /$93#$
} !bzWgD7j
} '*[7O2\%/
:@p]~{m:G
private int size=0; dkC_Sh{
>'n[B
private int[] queue; O0y0'P-rJq
Wrbv<8}%c
public int get() { Ju5Dd\
return queue[1]; _W@sFv%sj
} gHgqElr(
'h ?
public void remove() { E9Kp=3H
SortUtil.swap(queue,1,size--); ,or;8aYc#
fixDown(1); YS4"TOFw
} =f@71D1
file://fixdown J_a2DM6d
private void fixDown(int k) { LQqba4$
int j; ;7[DFlS\P
while ((j = k << 1) <= size) { l_2Xao$
if (j < size %26amp;%26amp; queue[j] j++; wBlE!Pm
if (queue[k]>queue[j]) file://不用交换 "z6p=B"?3
break; o^5UHFxTCB
SortUtil.swap(queue,j,k); +dCR$<e9r
k = j; r:rPzq1
} f:nXE&X[
} ;"f9"
private void fixUp(int k) { pVl7]_=m
while (k > 1) { ys)
int j = k >> 1; 7aRy])x
if (queue[j]>queue[k]) ']Czn._
break; 0(C[][a*u
SortUtil.swap(queue,j,k); vWW Q/^
k = j; d:Z|It
} BGNZE{K4"
} )4ok@^.
z$Z%us>io
} 8\)4waz$
P;7[5HFF
} MB5V$toC
M~X~2`fFH
SortUtil： )MV `'i
$Q|6W &?[;
package org.rut.util.algorithm; kQ[23
<,*w$
import org.rut.util.algorithm.support.BubbleSort; #cikpHLXG
import org.rut.util.algorithm.support.HeapSort; ?t;,Nk`jx
import org.rut.util.algorithm.support.ImprovedMergeSort; 0m4#{^Y
import org.rut.util.algorithm.support.ImprovedQuickSort; 9e;{o,r@
import org.rut.util.algorithm.support.InsertSort; cri-u E?
import org.rut.util.algorithm.support.MergeSort; %h_N%B$7c1
import org.rut.util.algorithm.support.QuickSort; uw>y*OLU+
import org.rut.util.algorithm.support.SelectionSort; wlwgYAD
import org.rut.util.algorithm.support.ShellSort; -hK^*vJ
hZ>1n&[@
/** 3ug>,1:6-
* @author treeroot W9GjUswv!
* @since 2006-2-2 pBVzmQF
* @version 1.0 gxDyCL$h3
*/ ^MWp{E
public class SortUtil { HT_nxe`E
public final static int INSERT = 1; ;%AY#b4m
public final static int BUBBLE = 2; 5M%)*.Y 3[
public final static int SELECTION = 3; -t*P=V|@
public final static int SHELL = 4; N]I::
public final static int QUICK = 5; 4SkCV
public final static int IMPROVED_QUICK = 6; efyGjfoO
public final static int MERGE = 7; Z1\=d=
public final static int IMPROVED_MERGE = 8; =`qEwA
public final static int HEAP = 9; Tn'o$J
_k)EqPYu@
public static void sort(int[] data) { [xDn=)`{V
sort(data, IMPROVED_QUICK); ;%/}(&E2
} 7Zh#7jiZ`
private static String[] name={ %pxHGO=)E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" RHI?_gf&
}; ;3=RM\
7$kTeKiP
private static Sort[] impl=new Sort[]{ \NL*$SnxP
new InsertSort(), o3:h!(#G
new BubbleSort(), K &G
new SelectionSort(), _10I0Z0
new ShellSort(), \uOR1z
new QuickSort(), aslb^
new ImprovedQuickSort(), fc^d3wH0L
new MergeSort(), D' h%.
new ImprovedMergeSort(), |zp}u(N
new HeapSort() fTI~wF8!
}; )4FW~o<i
\2[
public static String toString(int algorithm){ {%v{iE>
return name[algorithm-1]; U5;Y o+z
} j-/F*P
Ix.Y_}
public static void sort(int[] data, int algorithm) { q:P44`Aq
impl[algorithm-1].sort(data); ^}Gu'!z9D
} !h+VbZ
810uxw{\
public static interface Sort { MJcWX|(y
public void sort(int[] data); u/HNXJ7M`9
} e~G um
Nj}-"R\u
public static void swap(int[] data, int i, int j) { !?GW<Rh
int temp = data; 0PJ7o#}_{@
data = data[j]; ga|-~~
data[j] = temp; a_Z[@W
} RA:3ZV
} %H7H0%qW