[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; _|qJ)gD[
} \x?q!(;G2
int i1=l; ,5^XjU3c=
int i2=mid+1; ;/?M&rX
for(int cur=l;cur<=r;cur++){ 2>BWu
if(i1==mid+1) )7@f{E#w
data[cur]=temp[i2++]; Lt>"R! "x
else if(i2>r) d\&{Ev9v
data[cur]=temp[i1++]; o}H7;v8H
else if(temp[i1] data[cur]=temp[i1++]; )jkX&7x
else ?,~B@Kx
data[cur]=temp[i2++]; J%`-K"NB
} u:#+R_0#97
} \|9@*]6:
pJ35M
} P(pw$ q$S
h{xC0NC)
改进后的归并排序: ParOWs~W/
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package org.rut.util.algorithm.support; [r,a0s
fa7Z=:aG
import org.rut.util.algorithm.SortUtil; hbm%{*d
^UI{U1N~Bz
/** 70bI}/u
* @author treeroot dl_ h0
* @since 2006-2-2 {"|P
* @version 1.0 OI0#@_L&
*/ 2z9\p%MX
public class ImprovedMergeSort implements SortUtil.Sort { _K"|}bM
W>3[+wB
private static final int THRESHOLD = 10; e~C5{XEE
Sq^f}q
/* {(;dHF%{
* (non-Javadoc) mLApF5Hy
* LVNq@,s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j\l9|vpp
*/ H]&a}WQ_
public void sort(int[] data) { &4 Py
int[] temp=new int[data.length]; / blVm1F
mergeSort(data,temp,0,data.length-1); (T;4'c
} ?/ xk
k"_i7
private void mergeSort(int[] data, int[] temp, int l, int r) { :lj1[q:Y>
int i, j, k; b[&A,ZPh$@
int mid = (l + r) / 2; wh4ik`S 1
if (l == r) ;UuCSfs{
return; 7<{g+Q~7*
if ((mid - l) >= THRESHOLD) p!qV!:
mergeSort(data, temp, l, mid); Ip#BR!$n
else `x=W)o }
insertSort(data, l, mid - l + 1); %Jy0?WN
if ((r - mid) > THRESHOLD) ]WlE9z7:8
mergeSort(data, temp, mid + 1, r); /d;C)%$
else Gx Z'"x
insertSort(data, mid + 1, r - mid); \Tq !(]o^
~aKM+KmtPH
for (i = l; i <= mid; i++) { GJ YXCi
temp = data; hBb&-/
} wdS4iQD
for (j = 1; j <= r - mid; j++) { _dOR-<
temp[r - j + 1] = data[j + mid]; fik*-$V`
} GIXxOea1
int a = temp[l]; 1k-YeQNe
int b = temp[r]; ?,GCR1|4
for (i = l, j = r, k = l; k <= r; k++) { HJ4T! `'d
if (a < b) { ^s*j<fH
data[k] = temp[i++]; anDwv }
a = temp; -|E|-'
} else { R^8L^8EL
data[k] = temp[j--]; D7q%rO|F'
b = temp[j]; lmmB=F
} >6fc`3*!
} }:JE*D|
} \XDc{c]
Axb,{X[6g
/** qm RdO R
* @param data u!kC+0Y
* @param l I*,!zym
* @param i F3BWi[Xh
*/ Ik{[BRzUgt
private void insertSort(int[] data, int start, int len) { @tv3\eD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); poJ7q (
} Bw5zh1ALC;
} zadn`B#2
} Md!L@gX6<
} b| e7mis@
yGGQ;!/
堆排序： K@uUe3
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package org.rut.util.algorithm.support; E?$|`<o{|`
uu08q<B5b)
import org.rut.util.algorithm.SortUtil; TL^af-
nR%ASUx:Y
/** Qsv3`c
* @author treeroot %N((p[\H
* @since 2006-2-2 O>8|Lc
* @version 1.0 LOm*=MVex
*/ ]J<2a`IK!
public class HeapSort implements SortUtil.Sort{ +Fn^@/?yC
ryhme\%l;f
/* (non-Javadoc) ;%-f>'KhI7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }^T7S2_Qy
*/ Zp5;=8wa;
public void sort(int[] data) { 6yDc4AX
MaxHeap h=new MaxHeap(); pwj?
h.init(data); w5j6RQml
for(int i=0;i h.remove(); *g0}pD;r
System.arraycopy(h.queue,1,data,0,data.length); jC<1bf$K
} syuW>Z8s
2'R;z<_
private static class MaxHeap{ ?-'m#5i"
M5$YFGGR
void init(int[] data){ %}< e;t-O
this.queue=new int[data.length+1]; VD=}GY33=
for(int i=0;i queue[++size]=data; z"cF\F
fixUp(size); &/%A 9R,
} T6T3:DG_B
} px|y_.DB2x
PKDzIA~T
private int size=0; x#wkODLqi
m8Wv46%
private int[] queue; WCa>~dF>
/g|H?F0
public int get() { }>)e~\Tdzb
return queue[1]; _e2=BE`W)
} I+qg'mo
:0G_n\
public void remove() { u\L=nCtLby
SortUtil.swap(queue,1,size--); 4!%@{H`3
fixDown(1); yr4j
} jO` b&]0
file://fixdown ;3 N0)
private void fixDown(int k) { 5m.{ayE
int j; N^G $:GC
while ((j = k << 1) <= size) { _(#HQd,i
if (j < size %26amp;%26amp; queue[j] j++; <K^{36h
if (queue[k]>queue[j]) file://不用交换 HC%tJ:G
break; ll]MBq
SortUtil.swap(queue,j,k); J[Ckz]
k = j; MCPVql`+`q
} TH;kJ{[}
} ny(`An
private void fixUp(int k) { ;$`5L"I5$
while (k > 1) { '7lHWqN<
int j = k >> 1; Se0!-NUK0
if (queue[j]>queue[k]) 2kP0//
break; y.xt7 F1
SortUtil.swap(queue,j,k); R?%J
k = j; h=:*cqp4
} :htz]
} bc+~g>o
JbV\eE#KrC
} (d> M/x?W
cRR[ci34k
} SJseP_-
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SortUtil： <7U\@si4
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package org.rut.util.algorithm; +ESEAi91
pKxsK^O5[
import org.rut.util.algorithm.support.BubbleSort; IE)$.%q;)
import org.rut.util.algorithm.support.HeapSort; n\-nBrVSf
import org.rut.util.algorithm.support.ImprovedMergeSort; U(d K
import org.rut.util.algorithm.support.ImprovedQuickSort; ?L%BD7
import org.rut.util.algorithm.support.InsertSort; q <, b
import org.rut.util.algorithm.support.MergeSort; 11'^JmKA
import org.rut.util.algorithm.support.QuickSort; JAQ y
import org.rut.util.algorithm.support.SelectionSort; fwkklg^
import org.rut.util.algorithm.support.ShellSort; =:w]EpH"
`u<\ 4&W
/** G_vcuCHm
* @author treeroot :4Gc'bR
* @since 2006-2-2 qjcPJ
* @version 1.0 @r.w+E=
*/ n7|8`?R^
public class SortUtil { p)u?x)w=
public final static int INSERT = 1; Po)!vL"
public final static int BUBBLE = 2; }?\8%hK"a7
public final static int SELECTION = 3; t!=qt*
public final static int SHELL = 4; <Ny DrO"C3
public final static int QUICK = 5; +:IwP
public final static int IMPROVED_QUICK = 6; C`J>Gm
public final static int MERGE = 7; Qkvg85
public final static int IMPROVED_MERGE = 8; J]!&E~Y
public final static int HEAP = 9; VW$a(G_h
Gu#Vc.e
public static void sort(int[] data) { qG6?k}\\
sort(data, IMPROVED_QUICK); "jUM}@q5
} |;(95
private static String[] name={ P&>!B,f
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q&DM*!Jq
}; 6YHQ/#'G~
5 O't-'
private static Sort[] impl=new Sort[]{ <UEta>jj
new InsertSort(), Daw;6f:
new BubbleSort(), [%uj+?}6O
new SelectionSort(), ,+d\@:
new ShellSort(), PeX^aEc
new QuickSort(), H|.cD)&eYy
new ImprovedQuickSort(), &'V1p4'
new MergeSort(), D2y[?RG
new ImprovedMergeSort(), bQvhBa?
new HeapSort() 5LX%S.CW
}; !y$:}W?_
CE|iu!-4
public static String toString(int algorithm){ aPwUC:>`D
return name[algorithm-1]; t'e\Z2
} 'vX:)ZDi
/q^\g4J
public static void sort(int[] data, int algorithm) { m8T< x>
impl[algorithm-1].sort(data); n9%&HDl4
} b2tUJ2p
9cnLf#
public static interface Sort { yrF"`/zv6|
public void sort(int[] data); SSAf<44e
} hr/H vB
^vY[d]R _\
public static void swap(int[] data, int i, int j) { +%~/~1
int temp = data; q:/3uC7
data = data[j]; m-HL7&iG$
data[j] = temp; m ]h<y
} 6IPQ}/l
} (a9>gLI0