[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; lf%Ju$H
} |<Gq^3 2
int i1=l; ]v{TSP^/
int i2=mid+1; >[|Y$$
for(int cur=l;cur<=r;cur++){ Msea kF
if(i1==mid+1) G'qGsKf\
data[cur]=temp[i2++]; cf ~TVa)M
else if(i2>r) x9{&rldC
data[cur]=temp[i1++]; *)4`"D
else if(temp[i1] data[cur]=temp[i1++]; o(_~ st<
else zP$Ef7bB
data[cur]=temp[i2++]; z3X:.%
} Jg\1(ix
} c!})%{U
(fJ.o-LQ
} rxVJB3P9
'z.: e+Q_
改进后的归并排序: =$t
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package org.rut.util.algorithm.support; \C(dWs
6EeK5XLf,
import org.rut.util.algorithm.SortUtil; V0!.>sX9
A(<"oAe|
/** AJ`R2 $
* @author treeroot =u^{Jvl[
* @since 2006-2-2 Sd0y=!Pj=
* @version 1.0 7,![oY[
*/ ahJu+y
public class ImprovedMergeSort implements SortUtil.Sort { !W ,pjW%Y
?()$imb*
private static final int THRESHOLD = 10; M~/R1\'&j
Jm(sx'qPx
/* .]\+JTm
* (non-Javadoc) #MhieG5
* C)|{7W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $6 A91|ZSQ
*/ c6 tB9b
public void sort(int[] data) { |f.R]+cH
int[] temp=new int[data.length]; P)$q
mergeSort(data,temp,0,data.length-1); !e"TWO*X
} z8"(Yy7m
RU' WHk
private void mergeSort(int[] data, int[] temp, int l, int r) { !gfz4f&
int i, j, k; J6VG j=/
int mid = (l + r) / 2; (2vf <x
if (l == r) lx!9KQAM*
return; Z$'483<
if ((mid - l) >= THRESHOLD) OVE5:)$x
mergeSort(data, temp, l, mid); :O(<3"P/
else s[HQq;S
insertSort(data, l, mid - l + 1); [8J/#!B
if ((r - mid) > THRESHOLD) )K+Tvx3(m
mergeSort(data, temp, mid + 1, r); (VxWa#P
else 7Vd"AVn}g
insertSort(data, mid + 1, r - mid); :)9^T<
4Nx]*\\
for (i = l; i <= mid; i++) { [x.DwU%S
temp = data; &oyj8
} Ef2#}%>
for (j = 1; j <= r - mid; j++) { o/U"'FP
temp[r - j + 1] = data[j + mid]; ~YX!49XfHh
} &xGcxFd
int a = temp[l]; Q41eYzAi
int b = temp[r]; a &89K
for (i = l, j = r, k = l; k <= r; k++) { &74*CO9B9
if (a < b) { qU) pBA
data[k] = temp[i++]; Q]u*Oels
a = temp; i1kTP9
} else { 0R0j7\{
data[k] = temp[j--]; v'QmuMWF
b = temp[j]; JTxHM?/G
} Td`0;R'<}c
} dGrm1w
} [MkXQwY
5ma*&Q8+
/** A]FjV~PB
* @param data '#fwNbD
* @param l 3~%wA(|A
* @param i ?l3PDorR
*/ sBo|e]m#
private void insertSort(int[] data, int start, int len) { w53+k\.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); '*PJ-=G
} *&\fBi]
} dIUg e`O9
} k7\h- yn{
} ^q uv`d
UUF;Q0X
堆排序： iw$n*1M
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package org.rut.util.algorithm.support; 'z=QV{ni
Y_}DF.>I P
import org.rut.util.algorithm.SortUtil; 9Xu O\+z
*{y/wgX
/** B-<H8[GkG1
* @author treeroot PJCRvs|X
* @since 2006-2-2 V_SZp8
* @version 1.0 i8tH0w/(M
*/ $g?`yE(K
public class HeapSort implements SortUtil.Sort{ Xyrf$R'
^,$>z*WQ.
/* (non-Javadoc) 7|"gMw/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f~LM-7!zf}
*/ z}" Xt=G?
public void sort(int[] data) { OC[+t6
MaxHeap h=new MaxHeap(); ~S],)E1w
h.init(data); k365.nc
for(int i=0;i h.remove(); \*C}[D
System.arraycopy(h.queue,1,data,0,data.length); $ +`
} sKkk+-J4
&4%j
private static class MaxHeap{ )i;o\UU
5Z`9L|3d
void init(int[] data){ .mse.$TK.^
this.queue=new int[data.length+1]; T =l4Vb{>
for(int i=0;i queue[++size]=data; j>5D4}*]f
fixUp(size); %Tn0r|K
} ,pgpu !
} nI-^
;34 m!\N5
private int size=0; vB:_|B
,DHiM-v
private int[] queue; 4;*o}E
{hr+ENgV
public int get() { Wa8?o~0"L
return queue[1]; 0;b%@_E
} J(\]39y
m|RA@sY%`
public void remove() { p.gaw16}>
SortUtil.swap(queue,1,size--); \s.c.c*eh;
fixDown(1); Y+k)d^6r
} &wlSOC')j
file://fixdown ?E@9Nvr
private void fixDown(int k) { ,~!rn}MI<
int j; Sc<%$ Gd
while ((j = k << 1) <= size) { llf|d'5Nl
if (j < size %26amp;%26amp; queue[j] j++; w2!5Cb2
if (queue[k]>queue[j]) file://不用交换 H!D?;X
break; vsjl8L
SortUtil.swap(queue,j,k); RaS7IL:e
k = j; )V}u}5
} uKI2KWU?2
} 6QCU:2IiL
private void fixUp(int k) { `XwFH#_
while (k > 1) { KT)A{i
int j = k >> 1; (Ut)APM
if (queue[j]>queue[k]) .{-&3++WZ
break; +$eEZ;4
SortUtil.swap(queue,j,k); Yxal%
k = j; xp395ub6
} .@Z-<P"
} fE\;Cbi
UqaLTdYG
} %n3lm(-0U
m17H#!`
} }*2q7K2bj
piRP2Lbm*
SortUtil： p&nIUx"
CvwC| AW
package org.rut.util.algorithm; uZe|%xK$y
yW&|ZJF?
import org.rut.util.algorithm.support.BubbleSort; A;t6duBDf/
import org.rut.util.algorithm.support.HeapSort; MLL4nkO,`
import org.rut.util.algorithm.support.ImprovedMergeSort; A=7 [^I2
import org.rut.util.algorithm.support.ImprovedQuickSort; %|l^oC+E
import org.rut.util.algorithm.support.InsertSort; 7Ca+Pe}/n,
import org.rut.util.algorithm.support.MergeSort; *}Al0\q0M
import org.rut.util.algorithm.support.QuickSort; g4BEo'
import org.rut.util.algorithm.support.SelectionSort; rUX1Iu7
import org.rut.util.algorithm.support.ShellSort; $e=pdD~
\BT8-}
/** ZiBTe,;
* @author treeroot DK/xHIv8-
* @since 2006-2-2 \X5>HPB
* @version 1.0 Nw`}iR0i
*/ cxhS*"Ph
public class SortUtil { oC]|ARgQk|
public final static int INSERT = 1; GW_@hYIqD
public final static int BUBBLE = 2; :V>M{vd
public final static int SELECTION = 3; PYldqY
public final static int SHELL = 4; T@[(FVA N
public final static int QUICK = 5; OY'490
public final static int IMPROVED_QUICK = 6; sLE@Cm]k
public final static int MERGE = 7; \($EYhx
public final static int IMPROVED_MERGE = 8; "y_A xOH
public final static int HEAP = 9; &;~x{q]3
o}XbFLn
public static void sort(int[] data) { `%lgT+~T
sort(data, IMPROVED_QUICK); |OXufV?I
} ?fB}9(6
private static String[] name={ S7cxEOfAu
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P +U=/$o
}; 26fbBt8nP
^^[MDjNy@
private static Sort[] impl=new Sort[]{ >&K1+FSmyJ
new InsertSort(), H7 acT
new BubbleSort(), T{1Z(M+
new SelectionSort(), i"}%ib*X
new ShellSort(), %KxL{HY
new QuickSort(), .".xNHR#
new ImprovedQuickSort(), lW! U:
new MergeSort(), 3YyB0BMW
new ImprovedMergeSort(), "(uEcS2<
new HeapSort() hjB G`S#
}; 4}:a"1P"
o#X|4bES
public static String toString(int algorithm){ _ri1RK,
return name[algorithm-1]; 1LTl=tS#
} ;~Eb Q
$:I~y| !1
public static void sort(int[] data, int algorithm) { @D!KFJ
impl[algorithm-1].sort(data); 0ad -4
} ;<Dou7=
$gsn@P>"
public static interface Sort { ,nqG* o
public void sort(int[] data); RW!D!~
} +kF$I7LN
=(kwMJ
public static void swap(int[] data, int i, int j) { (>*<<a22
int temp = data; JO:40V?op
data = data[j]; k^3|A3A
data[j] = temp; `3!ERQU
} 9QaEUy*,
} #t /.fd