[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; -UoTBvObAm
} _C3O^/<n4V
int i1=l; jwL\|B oE
int i2=mid+1; Y|!m
for(int cur=l;cur<=r;cur++){ B#;6z%WK
if(i1==mid+1) WYN0,rv1:+
data[cur]=temp[i2++]; at+Nd K
else if(i2>r) Ya `$.D
data[cur]=temp[i1++]; 6r.#/' "
else if(temp[i1] data[cur]=temp[i1++]; k`((6
else Ge`PVwn
data[cur]=temp[i2++]; eg1Mdg\a
} U4NH9-U'
} Oz4vV_a&'
Yosfk\D
} G1a56TIN~
pkf$%{"e
改进后的归并排序: xOx=Z\ c
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package org.rut.util.algorithm.support; " ?Ux\)*
25j?0P"&
import org.rut.util.algorithm.SortUtil; A*~BkvPr
PA*1]i#2M=
/** |'``pq/}_
* @author treeroot j>?`N^
* @since 2006-2-2 \S_Ae;
* @version 1.0 eH V#Mey[
*/ Q@!XVQx4
public class ImprovedMergeSort implements SortUtil.Sort { u+O"c
vm7ag 7@O
private static final int THRESHOLD = 10; zE Ly1v\"
DX^8w?t
/* nsM.`s@V
* (non-Javadoc) Z2 Vri
* 0#NbAMt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g~2=he\C
*/ nIZsKbnw
public void sort(int[] data) { QnJLTBv
int[] temp=new int[data.length]; 9^8_^F
mergeSort(data,temp,0,data.length-1); _f~$iY
} F|G v
)%b 5uZ
private void mergeSort(int[] data, int[] temp, int l, int r) { 2r!- zEV
int i, j, k; VN0KK 1I
int mid = (l + r) / 2; Av0(zA2
if (l == r) e _(';Lk
return; PI@?I&Bo
if ((mid - l) >= THRESHOLD) YhzDw8f
mergeSort(data, temp, l, mid); |N}*
else dq%C~j{v
insertSort(data, l, mid - l + 1); )w5!'W4Z8
if ((r - mid) > THRESHOLD) F vTswM>
mergeSort(data, temp, mid + 1, r); q{%~(A5*H
else upaQoX/C
insertSort(data, mid + 1, r - mid); 0176
~N/a\%`
for (i = l; i <= mid; i++) { >K&chg@Hv
temp = data; NcHU)
} (.iwD&
for (j = 1; j <= r - mid; j++) { O)DAYBv^
temp[r - j + 1] = data[j + mid]; |3~]XN-
} .beqfcj"
int a = temp[l]; ?bu=QV@
int b = temp[r]; 2.=G
for (i = l, j = r, k = l; k <= r; k++) { $-|$4lrS
if (a < b) { "Bwmq9Jq
data[k] = temp[i++]; a#G3dY>
a = temp; *_d N9
} else { 4<vi@,s
data[k] = temp[j--]; j6};K ~N`
b = temp[j]; SkC.A?
} -E3cS
} +Wgfxk'{
} 8^D1u`
_yX.Apv]
/** ?RIf0;G
* @param data :>o0zG[;f
* @param l Ryygq,>VD.
* @param i k.jBu
*/ )y Zr]
private void insertSort(int[] data, int start, int len) { V1GkX=H},
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s[dIWYs#
} KF5r?|8M
} m2YsE j7
} Fq!_VF^r
} !*HJBZ]q
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堆排序： `u7^r^>A
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package org.rut.util.algorithm.support; 6$f\#TR
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import org.rut.util.algorithm.SortUtil; zUNUH^Il
ZBFn
/** >}Bcv%zZ
* @author treeroot Q$ Dx:
* @since 2006-2-2 ;Zj(**#H
* @version 1.0 S-ZN}N{,6
*/ md? cvGDE
public class HeapSort implements SortUtil.Sort{ #$W0%7
'RF`XX
/* (non-Javadoc) z}.6yHS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -Ah&|!/
*/ O^ui+44wp
public void sort(int[] data) { t+q;}ZvG
MaxHeap h=new MaxHeap(); J7- vB",U
h.init(data); pwS"BTZ
for(int i=0;i h.remove(); u*W! !(P/
System.arraycopy(h.queue,1,data,0,data.length); *]h"J]
} ]W4{|%@H"
bJ1Nf|3~E
private static class MaxHeap{ #gT"G18/!
?6nB=B)/
void init(int[] data){ zS|4@t\__
this.queue=new int[data.length+1]; *| W*Mu
for(int i=0;i queue[++size]=data; s3yGL
fixUp(size); 'W4v>0
} )!cucY
} $F9w0kz:,*
_u u&?<h
private int size=0; |e+3d3T35
"\`Fu
private int[] queue; 3!/J!X3L
1%R${Qhr
public int get() { m[Ihte->
return queue[1]; o#1Ta7Ro
} $'_Q@ZBq
p-)@#hE
public void remove() { \lQI;b;$
SortUtil.swap(queue,1,size--); F?]J`F\I
fixDown(1); &a e!lB
} +Yq?:uBV
file://fixdown OPE+:TvW^
private void fixDown(int k) { `Npo|.?=
int j; 3+d^Bpp4
while ((j = k << 1) <= size) { <YEKbnw$o
if (j < size %26amp;%26amp; queue[j] j++; AB,(%JT/2{
if (queue[k]>queue[j]) file://不用交换 EA1&D^nT
break; 4g2`[<S
SortUtil.swap(queue,j,k); R@NFpiw
k = j; ~"vS$>+
} "(p/3qFY
} iHf):J?8 y
private void fixUp(int k) { sb3z8:r
while (k > 1) { zDtC]y'
int j = k >> 1; zA+0jhuG
if (queue[j]>queue[k]) k:j_:C&.
break; ')yYpWO
SortUtil.swap(queue,j,k); ~}d\sQF.
k = j; J(!=Dno
} e&:%Rr]x
} LJb=9tp~
:k`Qj(7S
} \nWbGS(
OgQ8yKfDB
} 0QPY+6
DCLu^:|C"
SortUtil： fibudkg'>
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package org.rut.util.algorithm; !O`j
-EFdP]XO
import org.rut.util.algorithm.support.BubbleSort; Hf1b&8&:K
import org.rut.util.algorithm.support.HeapSort; n/*" 2
import org.rut.util.algorithm.support.ImprovedMergeSort; 5Uy*^C7M^
import org.rut.util.algorithm.support.ImprovedQuickSort; <"`f!k#[
import org.rut.util.algorithm.support.InsertSort; Qx|HvT2P
import org.rut.util.algorithm.support.MergeSort; {:_*P TVk
import org.rut.util.algorithm.support.QuickSort; T95FoA
import org.rut.util.algorithm.support.SelectionSort; !ii(2U
import org.rut.util.algorithm.support.ShellSort; gpzFY"MS=
jr.{M
/** rwW"B
* @author treeroot #?D[WTV
* @since 2006-2-2 sGNHA(;
* @version 1.0 QQ{*j7i)
*/ t.RDS2N|
public class SortUtil { e&8Meiv+d
public final static int INSERT = 1; lFcHE c
public final static int BUBBLE = 2; Kx,X{$Pe
public final static int SELECTION = 3; TxN+-< f
public final static int SHELL = 4; zPHx\z"
public final static int QUICK = 5; ;O~FiA~`c
public final static int IMPROVED_QUICK = 6; |9$C%@8
public final static int MERGE = 7; ^{0*?,-x
public final static int IMPROVED_MERGE = 8; Gx4uf
public final static int HEAP = 9; ,-k?"|tQ
jVGAgR=[G
public static void sort(int[] data) { a Iyzt
sort(data, IMPROVED_QUICK); HpUJ_pZ
} o>d0R w4h
private static String[] name={ x#5[i;-c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S{]3e-?
}; ^c.pvC"4j
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private static Sort[] impl=new Sort[]{ -H[@]Q4w
new InsertSort(), %a0q|)Nrj
new BubbleSort(), (=gqqOOl~
new SelectionSort(), eL)m(
new ShellSort(), F/tRyq`D
new QuickSort(), V8o, e
new ImprovedQuickSort(), (~F}O
new MergeSort(), :*|So5fs
new ImprovedMergeSort(), GvA4.s,
new HeapSort() I3x+pa^]2
}; "iK'O =M
PV=sqLM~
public static String toString(int algorithm){ RCK*?\m5
return name[algorithm-1]; 3w[uc~f
} :l Z\=2D
z1tCSt}7f
public static void sort(int[] data, int algorithm) { f1o^:}5x
impl[algorithm-1].sort(data); ;r]! qv:
} z?`7g%Z?{
_XrlCLp: d
public static interface Sort { i{Q,>Rt
public void sort(int[] data); -,mV~y
} ^$oEM0h
O0pXHXSAL
public static void swap(int[] data, int i, int j) { UA0( cK
int temp = data; o(3OChH
data = data[j]; vZ=dlu_t
data[j] = temp; q="ymx~
} !|ic{1!_
} Y~lOkH[z