[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; LbR-uc?x
} WNb$2q=
int i1=l; RrHnDO'
int i2=mid+1; EDo@J2A
for(int cur=l;cur<=r;cur++){ vOK;l0%
if(i1==mid+1) Xu_<4
data[cur]=temp[i2++]; S2R[vB4).
else if(i2>r) !-c*lb
data[cur]=temp[i1++]; _6m3$k_[MJ
else if(temp[i1] data[cur]=temp[i1++]; @EY}iK~
else K*Jtyy}r
data[cur]=temp[i2++]; K|G$s
} ja;5:=8A5
} -"e}YN/
&XsLp&Do2
} x3s^u~C)(w
Wn^^Q5U#
改进后的归并排序: L)}V[j#
%jxuH+L
package org.rut.util.algorithm.support; >D/~|`=p
#& wgsGV8C
import org.rut.util.algorithm.SortUtil; JC"K{V{
)!d1<p3
/** s.sy7%{
* @author treeroot 17cW8\
* @since 2006-2-2 'u[o`31.
* @version 1.0 \vsrBM
*/ 5gD)2Q6
public class ImprovedMergeSort implements SortUtil.Sort { Y/0O9}hf
.dCP8|
private static final int THRESHOLD = 10; u =kSs
6Qb)Uq3}]
/* W6O.E
* (non-Javadoc) ikhX5 &e
* ku;nVV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2NknC>9(\
*/ @'*#]YU8
public void sort(int[] data) { y.:-
int[] temp=new int[data.length]; $-]setdY
mergeSort(data,temp,0,data.length-1); ^,K.)s
} d&bc>Vt
?0mJBA
private void mergeSort(int[] data, int[] temp, int l, int r) { 0lCd,a2:
int i, j, k; j#,M@CE
int mid = (l + r) / 2; p^rX.?X
if (l == r) d;SRK @
return; %-/:ps
if ((mid - l) >= THRESHOLD) t4/eB<fP
mergeSort(data, temp, l, mid); _-\s[p5
else -C ON
insertSort(data, l, mid - l + 1); G=cH61
if ((r - mid) > THRESHOLD) %`QsX {?,
mergeSort(data, temp, mid + 1, r); ,R}KcZG)
else "IG$VjgcB
insertSort(data, mid + 1, r - mid); wmE,k1G
R0mT/h2
for (i = l; i <= mid; i++) { &H1D!N
temp = data; H}V*<mgw
} $Q?G*@y
for (j = 1; j <= r - mid; j++) { Zfv(\SI
temp[r - j + 1] = data[j + mid]; 0Eu$-)
} f_h"gZWV
int a = temp[l]; Z034wn\N
int b = temp[r]; ]8>UII,US
for (i = l, j = r, k = l; k <= r; k++) { 37-y
if (a < b) { SP7g qM
data[k] = temp[i++]; N#['fg'
a = temp; ~_db<!a
} else { P .4b+9Tx
data[k] = temp[j--]; L*01l"5
b = temp[j]; l;}7A,u
} ,beR:60)
} ,DuZMGg
} s<_LcQbt{
[RFK-E
/** ?VZXJO{^
* @param data (vsk^3R[6
* @param l }0*ra37z>
* @param i sq(Ar(L<
*/ E'S;4B5?
private void insertSort(int[] data, int start, int len) { dU>R<jl!$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); liw 9:@+V
} +'j*WVE%5
} &tz%WW%D8
} /Np"J
} b/,!J]W
cvV?V\1f
堆排序： 3b)T}g
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package org.rut.util.algorithm.support; h"1"h.
*!]Epb
import org.rut.util.algorithm.SortUtil; 199hQxib:
a^\- }4yR
/** *_/eAi/WG
* @author treeroot @EP{VV
* @since 2006-2-2 7cmr *y
* @version 1.0 ]7S7CVDk4
*/ sJI-
public class HeapSort implements SortUtil.Sort{ '"]>`=R
0?Tk*X
/* (non-Javadoc) W[X!P)=w]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5?{ >9j5
*/ _l!U[{l*d
public void sort(int[] data) { *o e0=
MaxHeap h=new MaxHeap(); w4fJ`,
h.init(data); &PBWJ?@O)r
for(int i=0;i h.remove(); a.}:d30
System.arraycopy(h.queue,1,data,0,data.length); wdcryejCkr
} h/0-Mrk;e
lmtQr5U
private static class MaxHeap{ z@l!\m-
C+(Gg^ w
void init(int[] data){ TaQ "G
this.queue=new int[data.length+1]; \LoSUl i
for(int i=0;i queue[++size]=data; <W=[ sWJ
fixUp(size); #!=>muZt
} :Bv&)RK
} F{*9[jY
{uwk[f{z
private int size=0; $,&gAU
GkGC4*n
private int[] queue; "Eok;io
"l[V%f E
public int get() { AY/-j$5+?
return queue[1]; Fe&n,
} 9u7n/o&8v6
8A8xY446)
public void remove() { V:G}=~+=
SortUtil.swap(queue,1,size--); x#F1@r8R
fixDown(1); tU)r[2H2
} 34m']n
file://fixdown cfC;eRgq~
private void fixDown(int k) { !skb=B#
int j; APQQ:'>N4~
while ((j = k << 1) <= size) { wwK~H
if (j < size %26amp;%26amp; queue[j] j++; *`g-gk
if (queue[k]>queue[j]) file://不用交换 Z\*5:a]
break; n$m]58w
SortUtil.swap(queue,j,k); %KJhtd"q
k = j; 3vRLg b
} #zSi/r/=1
} 9#s95RO
private void fixUp(int k) { >Oi2gPA
while (k > 1) { x<{;1F,k3
int j = k >> 1; &w;^m/zP3
if (queue[j]>queue[k]) >G4HZE
break; 5}X<(q(
SortUtil.swap(queue,j,k); h$aew63
k = j; VM<oUKh_3
} V 4\^TO`q=
} 1%/ NL?8#
hk"9D<&i>b
} a_ 9|xI
m|nL!Wc
} J/]o WC`u
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SortUtil： "9U+h2#]
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package org.rut.util.algorithm; x tYV"
$K6?(x_
import org.rut.util.algorithm.support.BubbleSort; #!8^!}nFO
import org.rut.util.algorithm.support.HeapSort; U+9-li
import org.rut.util.algorithm.support.ImprovedMergeSort; j1;_w
import org.rut.util.algorithm.support.ImprovedQuickSort; ?O<`h~'$+
import org.rut.util.algorithm.support.InsertSort; (^tr}?C
import org.rut.util.algorithm.support.MergeSort; >Bh)7>`3c
import org.rut.util.algorithm.support.QuickSort; + 4V1>e+
import org.rut.util.algorithm.support.SelectionSort; =qV4Sje|q
import org.rut.util.algorithm.support.ShellSort; Wk\mgGn+
`Ct'/h{
/** ;<bj{#mMv
* @author treeroot "o^bN 9=
* @since 2006-2-2 nl)_`8=
* @version 1.0 "q9~C
*/ WIEx '{
public class SortUtil { ,u?wYW;
public final static int INSERT = 1; >}dTO/
public final static int BUBBLE = 2; ]HJ{dcF
public final static int SELECTION = 3; Lo|NE[b:G
public final static int SHELL = 4; S{^6iR
public final static int QUICK = 5; 0$xK
public final static int IMPROVED_QUICK = 6; B91S h`
public final static int MERGE = 7; Pp1zW3+Q
public final static int IMPROVED_MERGE = 8; {(m+M
public final static int HEAP = 9; ibZt2@GB)I
pPiYPfs
public static void sort(int[] data) { TZ&4
sort(data, IMPROVED_QUICK); n=<NFkeX
} |dl0B26x
private static String[] name={ "t(1tWO1o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" LaIW,+
}; + AcKB82
?o(ZTlT
private static Sort[] impl=new Sort[]{ Aj8l%'h[
new InsertSort(), _"?c9
new BubbleSort(), };|!Lhl+
new SelectionSort(), *<`7|BH3
new ShellSort(), TRs[~K)n
new QuickSort(), LPq*ZZK
new ImprovedQuickSort(), ?r -\%_J_(
new MergeSort(), `DgaO-Dg3
new ImprovedMergeSort(), #Acon7Rp
new HeapSort() (TT3(|v
}; :DOr!PNA
936Ff*%(l
public static String toString(int algorithm){ 4c5^7";P
return name[algorithm-1]; avu*>SB
} Ij;==f~G
x !#Ma
public static void sort(int[] data, int algorithm) { ]k[Q]:q
impl[algorithm-1].sort(data); Cp .1/
} YXczyZA`x
cPA~eZbX
public static interface Sort { 7.wR"1p#
public void sort(int[] data); wFK:Dp_^
} MuDFdbtR
nwa\Lrh
public static void swap(int[] data, int i, int j) { ;yk9(wea}"
int temp = data; @wd!&%yzO
data = data[j]; E/"YId `A
data[j] = temp; ~pHJ0g:t
} EzzTJ>
} 2x-'>i_|g