[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; QT\||0V~p
} ^,W;dM2
int i1=l; (<bYoWrK#
int i2=mid+1; <Wd#HKIG>l
for(int cur=l;cur<=r;cur++){ zG IxmJ.
if(i1==mid+1) .|XG0M
data[cur]=temp[i2++]; ^"lVTDsU
else if(i2>r) <Zb~tYp
data[cur]=temp[i1++]; qr$h51C&
else if(temp[i1] data[cur]=temp[i1++]; dWc'RwL
else \mK;BWg)
data[cur]=temp[i2++]; \\R$C
} {>v5~G
} U ;%cp
NIo!WOi
} cFD3
`erKHZ]S
改进后的归并排序: mz>GbImVD~
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package org.rut.util.algorithm.support; 5eLm
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import org.rut.util.algorithm.SortUtil; c0ue[tb
6 l,8ev
/** /:Q
* @author treeroot e,K.bgi
* @since 2006-2-2 {*PbD;/f
* @version 1.0 0h-'TJg*sk
*/ "@^^niSFl
public class ImprovedMergeSort implements SortUtil.Sort { 8a8CY,n{
?hmuAgOtbh
private static final int THRESHOLD = 10; cjp~I/U
\1ncr4
/* ?/}N
* (non-Javadoc) wJc`^gj
* 0-Ga2Go9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }?)U`zF)7}
*/ jO0"`|(]s
public void sort(int[] data) { L$z(&%Nx
int[] temp=new int[data.length]; Di"Tv<RlQ
mergeSort(data,temp,0,data.length-1); ;#?G2AAv
} dQs>=(|t
\0veld
private void mergeSort(int[] data, int[] temp, int l, int r) { $ ~Ks!8'P
int i, j, k; [G",Yky
int mid = (l + r) / 2; /.WIED}>
if (l == r) UOpSH{N
return; YuUJgt .1
if ((mid - l) >= THRESHOLD) }X/>WiGh:
mergeSort(data, temp, l, mid); 6DG%pF,
else Jsa]RA
insertSort(data, l, mid - l + 1); IP
if ((r - mid) > THRESHOLD) P0/Ctke;
mergeSort(data, temp, mid + 1, r); fuU 3?SG
else 8'ut[
insertSort(data, mid + 1, r - mid); ^4Uk'T7V
;efF]")
for (i = l; i <= mid; i++) { jmG)p|6
temp = data; !CdF,pd/)m
} t$3B#=
for (j = 1; j <= r - mid; j++) { }9V0Cu1
temp[r - j + 1] = data[j + mid]; VHi'~B#'*
} h0 Xc=nj
int a = temp[l]; *nK4XgD
int b = temp[r]; >0UY,2d
for (i = l, j = r, k = l; k <= r; k++) { Q@!XVQx4
if (a < b) { R=3|(R+kA
data[k] = temp[i++]; =M6{{lI/
a = temp; xn>N/+,
} else { zE Ly1v\"
data[k] = temp[j--]; VU1Wr|
b = temp[j]; -,+~W#n
} <G0Ut6J>
} !"ir}Y%
} / */"gz%
g~2=he\C
/** 3 Q~0b+k
* @param data rp4{lHw>C/
* @param l B@@tKn_CQ
* @param i ->*~e~T
*/ )gD2wk(
private void insertSort(int[] data, int start, int len) { *&tTiv{^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4M!wm]n/%5
} [&IcIZ
} GO.7IL{{
} [%P[ x]-
} CED[\n
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堆排序： 0|]d^bo
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package org.rut.util.algorithm.support; |N}*
s)?GscPG!
import org.rut.util.algorithm.SortUtil; %Eugy
P#MUS_x
/** *8+HQ[[#
* @author treeroot >5E1y!
* @since 2006-2-2 `EfFyhG$
* @version 1.0 "%bU74>
*/ ~N/a\%`
public class HeapSort implements SortUtil.Sort{ `Z#':0Z
D>^g2!b:
/* (non-Javadoc) XZS%az1%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;at1|E*
*/ W]Nc6B*gI
public void sort(int[] data) { ^O=G%de
MaxHeap h=new MaxHeap(); >|`1aCg,
h.init(data); <$pv;]n
for(int i=0;i h.remove(); 2.=G
System.arraycopy(h.queue,1,data,0,data.length); HO_(it \
} (74y2U6
k7{|\w%
private static class MaxHeap{ Pd& Npp3
f`*VNB`
void init(int[] data){ K<r5jb
this.queue=new int[data.length+1]; BJ\81 R
for(int i=0;i queue[++size]=data; }D?qj3?bj
fixUp(size); KX3A|
} G;J)[y
} pr1bsrMuL
8^D1u`
private int size=0; -/0aGqY
#d<|_
private int[] queue; Xh}D_c
KK5_;<
public int get() { [clwmx
return queue[1]; k.jBu
} #6~Bg)7AM
eX lJ=S}
public void remove() { VXlAK(
SortUtil.swap(queue,1,size--); (+cZP&o
fixDown(1); ()w;~$J
} qJf\,7mi
file://fixdown 4e;$+!dlV
private void fixDown(int k) { ^nNpT!o
int j; @$ju Qm
while ((j = k << 1) <= size) { NQ;$V:s)
if (j < size %26amp;%26amp; queue[j] j++; cH4PrMm&
if (queue[k]>queue[j]) file://不用交换 $cc]Av4c2
break; =kzp$ i
SortUtil.swap(queue,j,k); 1 ?Zw
k = j; WC37=8mA
} ^c>Bh[
} #`f{\
private void fixUp(int k) { ~(yW#'G
while (k > 1) { u<N`;s
int j = k >> 1; Z h9D^I
if (queue[j]>queue[k]) %;R&cSZ
break; vF pKkS343
SortUtil.swap(queue,j,k); Q<g>WNb
k = j; PB.'huu
} @V:Y%#%
} |5:2?S2R
vdQ#CG$/
} aI;$N|]u
t+q;}ZvG
} 4[JF.O6}
98O]tL+k/u
SortUtil： guGX G+
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package org.rut.util.algorithm; 2<p@G#(
SdYbT)y
import org.rut.util.algorithm.support.BubbleSort; 0sH~yvM5
import org.rut.util.algorithm.support.HeapSort; u0,QsD)_X0
import org.rut.util.algorithm.support.ImprovedMergeSort; mvc ;.+
import org.rut.util.algorithm.support.ImprovedQuickSort; >;Vfs{Z(q
import org.rut.util.algorithm.support.InsertSort; OI"g-+~
import org.rut.util.algorithm.support.MergeSort; -$:*!55:j
import org.rut.util.algorithm.support.QuickSort; njZ vi}m~
import org.rut.util.algorithm.support.SelectionSort; jAue+tB
import org.rut.util.algorithm.support.ShellSort; 5/i/. 0?n
c2,g%(
/** 7CSz
* @author treeroot j[FB*L1!D
* @since 2006-2-2 s3nt2$=:t
* @version 1.0 nTD%i~t~o
*/ ]B3+&g
public class SortUtil { i>[xN[U(
public final static int INSERT = 1; m[Ihte->
public final static int BUBBLE = 2; (Fuu V{x|
public final static int SELECTION = 3; K@xMPB8in
public final static int SHELL = 4; n'{jc6&|
public final static int QUICK = 5; TbT/ 5W3
public final static int IMPROVED_QUICK = 6; pc@mQI
public final static int MERGE = 7; a9.255
public final static int IMPROVED_MERGE = 8; (Cq 38~mR
public final static int HEAP = 9; +Yq?:uBV
7-n HPDp'
public static void sort(int[] data) { WQ.{Ag?1
sort(data, IMPROVED_QUICK); kdlmj[=
} zDtC]y'
private static String[] name={ bXc*d9]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0<uLQVoR2n
}; C@t,oDU#
\),f?f-m
private static Sort[] impl=new Sort[]{ B6TE9IoSb8
new InsertSort(), x\~ <8o
new BubbleSort(), x0{B7/FN
new SelectionSort(), j7a}<\
new ShellSort(), 'U ZzH$h
new QuickSort(), &s}sA+w
new ImprovedQuickSort(), :OjmaP
new MergeSort(), bo<.pK$
new ImprovedMergeSort(), 5[B)U">]
new HeapSort() ,ZrR*W?iF
}; o@dTiQK_
<&+jl($"
public static String toString(int algorithm){ >?ar
return name[algorithm-1]; 1i.3P$F
} :BV$3]y
2_3os P\Z
public static void sort(int[] data, int algorithm) { ;~$Q;m1
impl[algorithm-1].sort(data); ?q Q.Wj6Mj
} %(6+{'j~#
_yH">x<
public static interface Sort { No[9m_
public void sort(int[] data); tl*v(ZW
} W+=j@JY}q9
g@M5_I(W
public static void swap(int[] data, int i, int j) { Kf(Px%G6K
int temp = data; iR{@~JN=)
data = data[j]; &FOq c
data[j] = temp; +/[Rvh5WZ
} CKe72OC
} (6mw@gzr