[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; \&a.}t
} dn,gZ"<
int i1=l; EA|k5W*b
int i2=mid+1; gi]ZG
for(int cur=l;cur<=r;cur++){ %M&3VQ9w
if(i1==mid+1) kq-6HDR
data[cur]=temp[i2++]; ug*D52?
else if(i2>r) vG Vd
data[cur]=temp[i1++]; VXm[-
else if(temp[i1] data[cur]=temp[i1++]; F98i*K`"
else PJgp+u<
data[cur]=temp[i2++]; n#*`!#
} }q!_!q,@
} 7zDiHac
4_LQ?U>$
} *8)2iv4[
/N)5 3!LT
改进后的归并排序: c8A`<-\MfB
}+RB=#~o
package org.rut.util.algorithm.support; [vTMS2
1;&;5
import org.rut.util.algorithm.SortUtil; [VSU"AJY
u3ZCT" !
/** %f&< wC
* @author treeroot 6EJVD!#[K
* @since 2006-2-2 (j&A",^^S
* @version 1.0 _:J*Cm[q
*/ q\$6F)ha3
public class ImprovedMergeSort implements SortUtil.Sort { z.)p P'CJo
f h<*8w0H
private static final int THRESHOLD = 10; nWWM2v
R,Oe$J<
/* XnUO*v^]
* (non-Javadoc) ULBg{e?l8
* 1u}nm;3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Kt/)pc
*/ ]hTb@.
public void sort(int[] data) { qv+R:YYOq
int[] temp=new int[data.length]; =AOWeLk*G
mergeSort(data,temp,0,data.length-1); Mkv|TyC
} H+ZSPHs
1n%8j*bJq
private void mergeSort(int[] data, int[] temp, int l, int r) { Jb(Y,LO^
int i, j, k; 7#2j>G{?]v
int mid = (l + r) / 2; R+=a`0_S
if (l == r) X K>&$<5{
return; p25Fn`}H
if ((mid - l) >= THRESHOLD) ]tt} #
mergeSort(data, temp, l, mid); 8i0
else Y=B3q8l5
insertSort(data, l, mid - l + 1); O\beKBT;
if ((r - mid) > THRESHOLD) ``QHG&$/
mergeSort(data, temp, mid + 1, r); fCUT[d+H
else ;vp\YIeX1
insertSort(data, mid + 1, r - mid); 4j'd3WGpbN
<94G
for (i = l; i <= mid; i++) { D`o<,Y
temp = data; d;G~hVu
} 1dG06<!
for (j = 1; j <= r - mid; j++) { F@vbSFv)/
temp[r - j + 1] = data[j + mid]; d'HOpJE
} 4%ZM:/
int a = temp[l]; sH!O0WL
int b = temp[r]; 5nLDj:C~
for (i = l, j = r, k = l; k <= r; k++) { `T WN^0!]
if (a < b) { :Jxh2
data[k] = temp[i++]; 2qj{n+
a = temp; -|_ir-j
} else { f~M8A.
data[k] = temp[j--]; TT}]wZ
b = temp[j]; Omyt2`q
} -q>^ALf|@>
} lF4u{B9DM
} _PXdzeI.
t@B(+
/** _a'A~JY
* @param data Np,2j KF(
* @param l (.X]F_*sc
* @param i T{Zwm!s
*/ {BV4h%P]:
private void insertSort(int[] data, int start, int len) { t9 F=^)s
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yp]@^TN
} Zk`#VH
} Z[L5 ;
} o'=VZT9
} sa#.l% #
=_d%=m
堆排序： 0!#;j{JQ
]T<^{jG
package org.rut.util.algorithm.support; 's%q
hC<14
import org.rut.util.algorithm.SortUtil; 7TWNB{ K_
2@i;_3sv
/** f(Hu {c5yV
* @author treeroot hnxc`VX>g
* @since 2006-2-2 \"^%90F
* @version 1.0 ?]!vRmZ;
*/ %_f;G+fK\p
public class HeapSort implements SortUtil.Sort{ v5$s#f<
'"xiS$b(
/* (non-Javadoc) v'9m7$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |nxdB&1n
*/ &RY)o^g[4
public void sort(int[] data) { S@}4-\
MaxHeap h=new MaxHeap(); r"_Y3SxxL
h.init(data); XAD3Z?
for(int i=0;i h.remove(); 2p< Aj!
System.arraycopy(h.queue,1,data,0,data.length); vrIV%l=
} JP=ZUu
|C-y}iQ:6~
private static class MaxHeap{ BQNp$]5s
p:[LnL
void init(int[] data){ ExrY>*v
this.queue=new int[data.length+1]; fluGf
for(int i=0;i queue[++size]=data; A7Y_HIo
fixUp(size); JAP(|
} 8(lCi$
} z`#_F}v,m/
{LB`)Kuu
private int size=0; 0m=(W^c
<GfVMD
private int[] queue; Y!n'" *J>
0XIxwc0Iw
public int get() { {ymb\$f
return queue[1]; 8 /m3+5
} YFvgz.>QE
fVUKvZ}P*
public void remove() { [W(Y3yyY
SortUtil.swap(queue,1,size--); >\bPZf)tJ)
fixDown(1); cU | _
} x[Q&k[xV
file://fixdown ^5x4q
private void fixDown(int k) { Qp+lJAY
int j; `|,tCM&-
while ((j = k << 1) <= size) { b]#~39Iph
if (j < size %26amp;%26amp; queue[j] j++; /(zB0TEd
if (queue[k]>queue[j]) file://不用交换 2np-Fc{S
break; VjTAN=
SortUtil.swap(queue,j,k); <2)v9c
k = j; -W^2*w
} ca}S{"
} Y_lCcu#OA
private void fixUp(int k) { R `Q?J[e
while (k > 1) { =n)#!i
int j = k >> 1; G>j"cj
if (queue[j]>queue[k]) i*A$SJ:}
break; b,vL8*
SortUtil.swap(queue,j,k); d<?X3&J
k = j; ] - h|]
} v1K4$&{F
} f>4+,@G
U\;Ml
} J{x##p<F$
Xr)g
} T-!|l7V~f
3]7ipwF2q
SortUtil： v6(,Ax&
KK .cDAR
package org.rut.util.algorithm; M'vXyb%$1
;<~j)8
import org.rut.util.algorithm.support.BubbleSort; -KA4Inn]5
import org.rut.util.algorithm.support.HeapSort; %rX\ P
import org.rut.util.algorithm.support.ImprovedMergeSort; s'2y%E#
import org.rut.util.algorithm.support.ImprovedQuickSort; GMt)}Hz
import org.rut.util.algorithm.support.InsertSort; _"`uqW79
import org.rut.util.algorithm.support.MergeSort; B1HQz@^
import org.rut.util.algorithm.support.QuickSort; d`<#}-nh
import org.rut.util.algorithm.support.SelectionSort; 8Q)y%7{6
import org.rut.util.algorithm.support.ShellSort; #C'o'%!(
e4?<GT
/** 5auL<Pq
* @author treeroot S/)
* @since 2006-2-2 kKNk2!z`M
* @version 1.0 /XbY<pj
*/ ,!8*g[^O
public class SortUtil { OcLg3.:L
public final static int INSERT = 1; pC55Ec<
public final static int BUBBLE = 2; M55e=
public final static int SELECTION = 3; #r-j.f}yx
public final static int SHELL = 4; k-;.0!D^
public final static int QUICK = 5; 8UjCX[v
public final static int IMPROVED_QUICK = 6; (4E.Li<O
public final static int MERGE = 7; 44g`=o@
public final static int IMPROVED_MERGE = 8; /QM0.{Ypl
public final static int HEAP = 9; p]X!g
*#3voJjV(
public static void sort(int[] data) { Z5{*? 2
sort(data, IMPROVED_QUICK); ".Tf<F
} Y*h`),
private static String[] name={ qQ2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DtI%-I.
}; *8pe<:A#p
'33Yl+h
private static Sort[] impl=new Sort[]{ kG_&-b
new InsertSort(), <VauJB*R
new BubbleSort(), ?w c3+?\J
new SelectionSort(), 5)/4)0
new ShellSort(), 6i*p +S?U"
new QuickSort(), CfazD??x
new ImprovedQuickSort(), S5YDS|K
new MergeSort(), q[Sp|C6x
new ImprovedMergeSort(), D0,oml
new HeapSort() ?eYchVq
}; FRs|!\S=
61t-
public static String toString(int algorithm){ {VrAh*#h
return name[algorithm-1]; RBHqLg(
} >Gw%r1)
g&5pfrC [
public static void sort(int[] data, int algorithm) { &B{Jxc`VA
impl[algorithm-1].sort(data); c@"i?
} SWe!9Y$
&T|UAM.
public static interface Sort { oPCIlH
public void sort(int[] data); )BMWC k
} >cU*D:
&6~ncQWu
public static void swap(int[] data, int i, int j) { =Un6|]
int temp = data; ^.><t+tM
data = data[j]; q>Ar.5&M_
data[j] = temp; V< 9em7
} Td=]tVM
} E<fwl1<88