[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; #\]:lr{>?4
} do1aH$Iw
int i1=l; g0D(:_QXp:
int i2=mid+1; &u'$q
for(int cur=l;cur<=r;cur++){ 2Y@:Vgg
if(i1==mid+1) q-fxs8+m|
data[cur]=temp[i2++]; C&vUZa[p
else if(i2>r) 75LIQ!G|=
data[cur]=temp[i1++]; Je#vl4<L
else if(temp[i1] data[cur]=temp[i1++]; F#w=z/
else D|}%(N@sl
data[cur]=temp[i2++]; Rx22W:S=C.
} 5:ZM-kZT
} *L3>:],7
2R!1Vl
} .'y]Ea
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改进后的归并排序: Xk_xTzJ
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package org.rut.util.algorithm.support; j~eYq
'@ym-\,
import org.rut.util.algorithm.SortUtil; .'q0*Pe
rVx%"_'*-
/** u2SnL$A7
* @author treeroot ix<sorR H
* @since 2006-2-2 MHv2r
* @version 1.0 Tkhu,
*/ yE(>R(^
public class ImprovedMergeSort implements SortUtil.Sort { $Q[a^V~:
\o-Q9V
private static final int THRESHOLD = 10; 8Q&hhmOnz
s!Xj'H7K
/* OA\2ja~+
* (non-Javadoc) cvR|qHNX
* AS34yM(h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5JE8/CbH
*/ }vRs n-E@
public void sort(int[] data) { p4 #U:_
int[] temp=new int[data.length]; +1Ha,Ok
mergeSort(data,temp,0,data.length-1); xD}ha
} E-NuCP%|c
5G@z l
private void mergeSort(int[] data, int[] temp, int l, int r) { 7-"ml\z
int i, j, k; 2,c{Z$\kn
int mid = (l + r) / 2; Ixhe86-:T
if (l == r) HL;y5o?
return; Y|t]bb
if ((mid - l) >= THRESHOLD) ;?>xuC$
mergeSort(data, temp, l, mid); 28u)q2s^W|
else TbqED\5@9w
insertSort(data, l, mid - l + 1); 8}3dwr;-
if ((r - mid) > THRESHOLD) G2]/g
mergeSort(data, temp, mid + 1, r); 3%?01$k
else !7MC[z(|N
insertSort(data, mid + 1, r - mid); +$KUy>
Yyq:5V!
for (i = l; i <= mid; i++) { :yN;_bC!b%
temp = data; @B;2z_Y!l
} (|_1ku3!
for (j = 1; j <= r - mid; j++) { uXiAN#1
temp[r - j + 1] = data[j + mid]; yUF<qB
} CA7ZoMB#
int a = temp[l]; C%LRb{|d
int b = temp[r]; q-%;~LF
for (i = l, j = r, k = l; k <= r; k++) { 9Xb,Swo~
if (a < b) { c:0nOP
data[k] = temp[i++]; xS%Z
a = temp; zc&>RM
} else { 99%oY
data[k] = temp[j--]; Fp>iwdjFg
b = temp[j]; \F;V69'
} YPQ&hEu0
} (H/JB\~r
} 1!,xB]v1Ri
@= f2\hU
/** [5 Mt,skC:
* @param data &kKopJH
* @param l b/IT8Cm3
* @param i q<mDs$^K
*/ Xx_v>Jn!
private void insertSort(int[] data, int start, int len) { N|[P%WM3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U)~?/s{v
} h#Cq-^D#~
} $\kqh$")
} (q'w"qj
} EoM}Co
07WZ w1(;
堆排序： pI2g\cH>
&WN#HI."]
package org.rut.util.algorithm.support; x<#Z3Kla
qkB)CY7
import org.rut.util.algorithm.SortUtil; hA1\+r
BX :77?9,+
/** c,%9Fh?(
* @author treeroot EgO=7?(pW
* @since 2006-2-2 <fq?{z
* @version 1.0 @+LkGrDP
*/ 'EFSr!+
public class HeapSort implements SortUtil.Sort{ %/KN-*
ft oz0Vb
/* (non-Javadoc) SE=3`rVJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F3*]3,&L
*/ "Sp+Q&2U
public void sort(int[] data) { rW$ )f
MaxHeap h=new MaxHeap(); ,L ;ueAo
h.init(data); b~?FV>gl
for(int i=0;i h.remove(); b#%s!
System.arraycopy(h.queue,1,data,0,data.length); q{/>hvl
} k2Yh?OH
^c?2n
private static class MaxHeap{ D<9FSxl6
=Q985)Y&
void init(int[] data){ W=YFe<Q
this.queue=new int[data.length+1]; ?c712a ?
for(int i=0;i queue[++size]=data; =!{7ZSu\
fixUp(size); ycAQHY~n
} ,4$ZB(\
} eqz#KN`n#
P_11N9C
private int size=0; uM"G)$I\
W]Z;=-CBr
private int[] queue; 3vx*gfr3
g.yr) LHt0
public int get() { 6XyhOs%/
return queue[1]; aw9/bp*N
} _l$V|
|^jl^oW
public void remove() { X`kTbIZ|
SortUtil.swap(queue,1,size--); YCvIB'
fixDown(1); 3@XkO
} e|x1Dq
file://fixdown $j61IL3+
private void fixDown(int k) { cVjs-Xf7D%
int j; PCzC8~t
while ((j = k << 1) <= size) { |sd0fTK
if (j < size %26amp;%26amp; queue[j] j++; _t[RHrs
if (queue[k]>queue[j]) file://不用交换 MY>mP
break; v'`VyXetl
SortUtil.swap(queue,j,k); R;+vE'&CO
k = j; `I|$U)'
} pR6mSfer
} oujg( ^E
private void fixUp(int k) { Q)eYJP=W
while (k > 1) { ,CiN@T \&
int j = k >> 1; K|Sh
if (queue[j]>queue[k]) ~,[<R
break; ZmSe>}B=
SortUtil.swap(queue,j,k); LIfQh
k = j; X|!VtO
} }7p`8?
} eUP.:(E
Fc{M N"
} J3Ipk-'lx
'1'#,u!
} bgD4;)?5b
d/I,`
SortUtil： AE`z~L,
^P30g2gv>
package org.rut.util.algorithm; +T]/4"^M
Nl~'W
import org.rut.util.algorithm.support.BubbleSort; Ql`N)!
import org.rut.util.algorithm.support.HeapSort; 3 !W M'i
import org.rut.util.algorithm.support.ImprovedMergeSort; +OSF0#bj
import org.rut.util.algorithm.support.ImprovedQuickSort; )anprhc
import org.rut.util.algorithm.support.InsertSort; ~mAv)JK
import org.rut.util.algorithm.support.MergeSort; Zb> UY8
import org.rut.util.algorithm.support.QuickSort; 7p"4rL
import org.rut.util.algorithm.support.SelectionSort; qg_M9xJ
import org.rut.util.algorithm.support.ShellSort; l/WQqT
yU ?TdM\
/** .%~m|t+Rt
* @author treeroot 0?@;zTE0
* @since 2006-2-2 =$kSvCjP
* @version 1.0 h=<x%sie
*/ F3)w('h9c
public class SortUtil { Cp!bsasj
public final static int INSERT = 1; *@;Pns]L-
public final static int BUBBLE = 2; 7T[Kjn^{Oj
public final static int SELECTION = 3; JDbRv'F:(
public final static int SHELL = 4; ~m`j=ot
public final static int QUICK = 5; ;ZOu-B]q
public final static int IMPROVED_QUICK = 6; o8uak*"{
public final static int MERGE = 7; \0)v5u
public final static int IMPROVED_MERGE = 8; "pRi1Y5)l
public final static int HEAP = 9; SM?rss.=
wk+| }s
public static void sort(int[] data) { 0j\} @
sort(data, IMPROVED_QUICK); (FVHtZi7
} N [qNSo|
private static String[] name={ ~<Eu @8+_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Bp:PAy
}; gUa-6@
o5h*sQ9
private static Sort[] impl=new Sort[]{ }0okyGg>q
new InsertSort(), 8'<RPU}M
new BubbleSort(), f;{K+\T
new SelectionSort(), |BA&ixHe~C
new ShellSort(), @IE.@1
new QuickSort(), /#Fz K
new ImprovedQuickSort(), c^F@9{I
new MergeSort(), m#Y[EPF=|
new ImprovedMergeSort(), td!YwN*
new HeapSort() xI>HY9i)
}; kac-@
dy"7Wl]hi7
public static String toString(int algorithm){ 9z'(4U
return name[algorithm-1]; ^1w<wB\B
} { POfT m}
9O4\DRe5c
public static void sort(int[] data, int algorithm) { ,DIr&5>p2
impl[algorithm-1].sort(data); tNf_,]u
} rds4eUxe
x'iBEm
public static interface Sort { GeFu_7u!|
public void sort(int[] data); -/ YY.F-
} |-Q="7b%
8+mu'RZ X
public static void swap(int[] data, int i, int j) { yc7"tptfF
int temp = data; KN<KZM
data = data[j]; ],|;
data[j] = temp; F9J9zs*,
} nd)`G$gL
} rD!UP1Nb