[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; }<^QW't_Y
} "0 $UnR
int i1=l; Y94S!TbB
int i2=mid+1; Z&of-[)
for(int cur=l;cur<=r;cur++){ &B\ sG=
if(i1==mid+1) Ab6R?mUM
data[cur]=temp[i2++]; 1Qw_P('}
else if(i2>r) 55FRPNx-x
data[cur]=temp[i1++]; sC A
else if(temp[i1] data[cur]=temp[i1++]; =Z ql6D
else E=Vp%08(
data[cur]=temp[i2++]; L1Jn@
} us E%eF]
} hHZ'*,9 y
nH<#MGBS
} 8S7#tb@3
K#Zv>x!to
改进后的归并排序: iK=QP+^VN
qOy0QZ#0
package org.rut.util.algorithm.support; [ ebk u_
1|m%xX,[
import org.rut.util.algorithm.SortUtil; JvK]EwR ;
>}:
/** 1m5*MY
* @author treeroot n,d)Wwe_`y
* @since 2006-2-2 n(`|:h"
* @version 1.0 "n_X4e+18P
*/ v-BQ>-&s
public class ImprovedMergeSort implements SortUtil.Sort { %>$Puy\U
*`8JJs0g
private static final int THRESHOLD = 10; loC~wm%Ql
D^gS.X^
/* [X91nUz#
* (non-Javadoc) wh)F&@6 R!
* 0*_E'0L8e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,OERDWW|6
*/ |Sm/s;&c6
public void sort(int[] data) { ]6F\a= J
int[] temp=new int[data.length]; f>bL }L
mergeSort(data,temp,0,data.length-1); A'.=SA2.Y
} H~^)^6)^T
}V[ORGzox
private void mergeSort(int[] data, int[] temp, int l, int r) { l6L?jiTl_
int i, j, k; PQp =bX,
int mid = (l + r) / 2; G:3szz
if (l == r) p{}4#+-<#H
return; A$]s{`
if ((mid - l) >= THRESHOLD) (k8}9[3G
mergeSort(data, temp, l, mid); X`1R&K;z^
else XDHi4i47`o
insertSort(data, l, mid - l + 1); 050,S`%<g8
if ((r - mid) > THRESHOLD) tHAe
mergeSort(data, temp, mid + 1, r); yRIXUCy
else ({Pjz;xM
insertSort(data, mid + 1, r - mid); a9UXg<4
^,#my<{
for (i = l; i <= mid; i++) { !JyY&D~`
temp = data; ]jYFrOMy4S
} SZEi+CRs0
for (j = 1; j <= r - mid; j++) { J!2j]?D/e
temp[r - j + 1] = data[j + mid]; %pxO<O
} Nk<^ Qv
int a = temp[l]; 4"_`Mu_%
int b = temp[r]; aZ+><1TD
for (i = l, j = r, k = l; k <= r; k++) { 9?8PMh.
if (a < b) { b+|3nc!
data[k] = temp[i++]; 2:_6nWl
a = temp; =#v? }JG
} else { mBE&>}G<
data[k] = temp[j--]; ^5.XQ0n
b = temp[j]; dI&Q5M8
} TL)*onA9
} (0B?OkQ
} DzQ
l#`G4Vf
/** #fYB4.i~
* @param data tc<uS%XT4^
* @param l 6pSi-FH
* @param i N0.|Mb"?t
*/ E5$]0#jB
private void insertSort(int[] data, int start, int len) { ?3p7MjvZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;AE-=/<
} 4(|yl^w
} nYFrp)DLK
} wD=]U@t`,
} I#&r5Q
ZZ7qSyBs?
堆排序： M `^[Y2 c
i'7+ ?YL
package org.rut.util.algorithm.support; u '7h(1@
kQ lU.J>^
import org.rut.util.algorithm.SortUtil; '*`#xNu[
T*f/M
/** >WIc"y.
* @author treeroot xbm%+
* @since 2006-2-2 ]S%(l,
* @version 1.0 l6y}>]
*/ PO`p.("h
public class HeapSort implements SortUtil.Sort{ C+llA
}Nsdk',}
/* (non-Javadoc) D%abBE1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) USEb} M`
*/ j/z=<jA
public void sort(int[] data) { >m>F {v
MaxHeap h=new MaxHeap(); ca{MJz'
h.init(data); _ i}W1i
for(int i=0;i h.remove(); l2qvYNMw
System.arraycopy(h.queue,1,data,0,data.length); N,c!1:b
} D2?H"PH
)63 $,y-;$
private static class MaxHeap{ dPwyiV0
kIVQ2hmv
void init(int[] data){ H*'1bLzq
this.queue=new int[data.length+1]; iCE!TmDT
for(int i=0;i queue[++size]=data; jYFJk&c
fixUp(size); \&5V';
} !Aw^X} C
} b,E?{uG
D&"D[|@
private int size=0; y %Q.(
<Gi%+I@szl
private int[] queue; _cX}!d!j
@"-\e|[N
public int get() { \</!kY*3@t
return queue[1]; kFv*>>X`
} Zd6ik&S
P[2!D)A
public void remove() { T&?g)
SortUtil.swap(queue,1,size--); NOo?
fixDown(1); (Jk&U8y
} q(6.VU@
file://fixdown <w{?b'/q
private void fixDown(int k) { /ce;-3+
int j; c Mgd
while ((j = k << 1) <= size) { #wI}93E
if (j < size %26amp;%26amp; queue[j] j++; d+ jX49Vt
if (queue[k]>queue[j]) file://不用交换 _x!idf
break; "XR=P> xk
SortUtil.swap(queue,j,k); wlT8|
k = j; STp9Gh-
} L~Gr,i
} #h5lz%2g
private void fixUp(int k) { m&:&z7^p
while (k > 1) { mGjB{Q+
int j = k >> 1; tWIs |n
if (queue[j]>queue[k]) :V(LBH0
break; 0O9b 7F
SortUtil.swap(queue,j,k); C#kE{Qw10r
k = j; ^#HaH
} #ES[),+|mB
} H<(F$7Q!\
68Fl/
} j uA@"SG
\c< oVF'
} Q":_\inF
Alxf;[s
SortUtil： BNfj0e5b
V\cbIx(Z^
package org.rut.util.algorithm; HwUaaK
?woL17Gt
import org.rut.util.algorithm.support.BubbleSort; wa"0`a:`;
import org.rut.util.algorithm.support.HeapSort; rwRZGd *p
import org.rut.util.algorithm.support.ImprovedMergeSort; ^dI;B27E*
import org.rut.util.algorithm.support.ImprovedQuickSort; CS7b3p!I
import org.rut.util.algorithm.support.InsertSort; CO wcus
import org.rut.util.algorithm.support.MergeSort; VeGSr
import org.rut.util.algorithm.support.QuickSort; (?jK|_
import org.rut.util.algorithm.support.SelectionSort; ';tlV u
import org.rut.util.algorithm.support.ShellSort; n<.7tr0f\
/)ZjI W"|
/** FDMQLxf
* @author treeroot Zhfp>D
* @since 2006-2-2 Uwc%'=@
* @version 1.0 Lce,]z\_
*/ g\q .
public class SortUtil { AYAU
public final static int INSERT = 1; \@gV$+{9
public final static int BUBBLE = 2; ,:?ibE=
public final static int SELECTION = 3; J,=K1>8s
public final static int SHELL = 4; hX.cdt_?
public final static int QUICK = 5; /5NWV#-
public final static int IMPROVED_QUICK = 6; 'Z{`P0/^o`
public final static int MERGE = 7; kL'4m
public final static int IMPROVED_MERGE = 8; ~H}Z;n]H
public final static int HEAP = 9; OrkcY39"~a
C4mkt2Eb0a
public static void sort(int[] data) { gP%<<yl
sort(data, IMPROVED_QUICK); 3:,%>#"
} )Te\6qM
private static String[] name={ ~7:q+\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `<YMkp[
}; QVT0.GzR
G\sx'#Whc
private static Sort[] impl=new Sort[]{ w <r*&
new InsertSort(), uw+nll*W%
new BubbleSort(), >z<L60S
new SelectionSort(), q,P.)\0A
new ShellSort(), /!]K+6>u
new QuickSort(), 7X$CJ%6b
new ImprovedQuickSort(), iC#a+G*N_M
new MergeSort(), 1)z'-dQ-5$
new ImprovedMergeSort(), f(Xin3#'
new HeapSort() T9yI%;D
}; PaTOlHr
$DDO9
public static String toString(int algorithm){ 8-;.Ejz!\A
return name[algorithm-1]; ,RPb<3 B
} f#s6 'g
)z7CT|h7S
public static void sort(int[] data, int algorithm) { `wi+/^);
impl[algorithm-1].sort(data); 1uo-?k
} 4e#g{,
< se~wR
public static interface Sort { mS%4
public void sort(int[] data); qz`-?,pF
} LQF;T7VKS)
02]HwsvZ
public static void swap(int[] data, int i, int j) { <aPZE6z
int temp = data; aj?ZVa6
data = data[j]; WL+EpNKSf
data[j] = temp; 4 $k{,
} Id?-Og2iV
} /Z2u0jNArP