[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; ./XX
} SZe55mK`
int i1=l; wl]3g
int i2=mid+1; _"Bj`5S
for(int cur=l;cur<=r;cur++){ M#o.O?.`
if(i1==mid+1) nQOdM#dP
data[cur]=temp[i2++]; I?g}q,!]
else if(i2>r) IXtG 36O
data[cur]=temp[i1++]; 8Y`g$2SZ^8
else if(temp[i1] data[cur]=temp[i1++]; .kU^)H"l
else $|g1 _;(G
data[cur]=temp[i2++]; ~)_Nh
} f:+/=MW
} }#D=Rf?2\P
7s6+I_n
} b)'CP Cu*
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改进后的归并排序: ].xSX0YQ%
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package org.rut.util.algorithm.support; o]&q'>Rf
/jJD {
import org.rut.util.algorithm.SortUtil; *]U`]!Esp
N\__a~'0p
/** %r1#G.2YW
* @author treeroot &,G2<2_b
* @since 2006-2-2 ZH\t0YhrVe
* @version 1.0 (4 ZeyG@
*/ :lo5,B;k
public class ImprovedMergeSort implements SortUtil.Sort { lFt!
xk~gGT&
private static final int THRESHOLD = 10; }p6]az3
o%~fJx:]y
/* 8WQ#)
* (non-Javadoc) #[9UCX^=
* lfDd%.:q4S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _1E c54D
*/ F_:zR,P%#
public void sort(int[] data) { X,VI5$
int[] temp=new int[data.length]; (n7xYGfYS
mergeSort(data,temp,0,data.length-1); 8%B_nVc
} 9R8q+2
btEyvqs~X
private void mergeSort(int[] data, int[] temp, int l, int r) { D^O[_/i&
int i, j, k; %" bI2
int mid = (l + r) / 2; &2u |7U.
if (l == r) b 3Q6-
return; 2{=D)aC$f
if ((mid - l) >= THRESHOLD) B1|nT?}J(
mergeSort(data, temp, l, mid); xK_UkB-$i
else ;6PU
insertSort(data, l, mid - l + 1); VI4mEq,V
if ((r - mid) > THRESHOLD) 95#]6*#[4!
mergeSort(data, temp, mid + 1, r); J8S$YRZ_
else T2Z$*;,>T
insertSort(data, mid + 1, r - mid); neM)(` gp
G 0pq'7B
for (i = l; i <= mid; i++) { :Y/aT[
temp = data; 3>VL>;75[
} q]: 72+
for (j = 1; j <= r - mid; j++) { K!CVS7
temp[r - j + 1] = data[j + mid]; 5B:"$vC{=
} QEqYqAGzu|
int a = temp[l]; Mu`_^gG
int b = temp[r]; TM6wjHFm
for (i = l, j = r, k = l; k <= r; k++) { 3_ J'+
if (a < b) { p35)K5V
data[k] = temp[i++]; h?dSn:Y\?
a = temp; heIys.p
} else { D+uo gRS61
data[k] = temp[j--]; v[uVAbfQ
b = temp[j]; V.`hk^V,
} J&\Q3_vro9
} \wz^Z{U
} IQ\!wWKmY
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/** ib(|}7Je
* @param data bgE]Wk0
* @param l I>.pkf<V
* @param i Td|,3 n
*/ BEb?jRMjLg
private void insertSort(int[] data, int start, int len) { Xxh^4vKjX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2H$](k?
} ru`7iqcz
} DDmC3
} d4IQ;u
} axC{azo|
hJ8&OCR }
堆排序： 7hn[i,?` H
7#"NKxb
package org.rut.util.algorithm.support; :|5 m"X\
)R `d x
import org.rut.util.algorithm.SortUtil; 83vZRQw
.CEC g*f
/** I_f%%N%
* @author treeroot Zex~ $r
* @since 2006-2-2 cG0)F%?X?
* @version 1.0 ^NU_Tp:2^
*/ \,NT5>
public class HeapSort implements SortUtil.Sort{ ]p+KN>1e
k8ILo)
/* (non-Javadoc) 4S4MQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Nk-xnTZ"
*/ 8t=H
public void sort(int[] data) { yj_/:eX
MaxHeap h=new MaxHeap(); ]vcT2lr]
h.init(data); m$[:J
for(int i=0;i h.remove(); ?3DFm
System.arraycopy(h.queue,1,data,0,data.length); 5u9lKno
} c(Y~5A{TXO
m %+'St|qr
private static class MaxHeap{ qh>An;:u
j^#\km B
void init(int[] data){ +/$&P3
this.queue=new int[data.length+1]; ^-?^iWQG
for(int i=0;i queue[++size]=data; (BH<\&yHE
fixUp(size); n+=7u[AZi
} ).,twf58
} vh2/d.MO
tlO=>
private int size=0; [4qvQ7Y !
5D/Td#T04
private int[] queue; ;ja~Q .}4
oD2! [&
public int get() { ?XVE{N
return queue[1]; bh8GP]*E|
} `Qb!W45
)2EvZn
public void remove() { ;/Y#ph[
SortUtil.swap(queue,1,size--); kygj" @EX
fixDown(1); T@vE@D
} am5;B`}q
file://fixdown R7:u 8-dU1
private void fixDown(int k) { ~,s'-
int j; _0naqa!JyH
while ((j = k << 1) <= size) { aC9iNm8w
if (j < size %26amp;%26amp; queue[j] j++; *cFGDQ!
if (queue[k]>queue[j]) file://不用交换 P)y2'JKL
break; ql.[Uq
SortUtil.swap(queue,j,k); u7J:ipyiq2
k = j; (oiQ5s^f
} '#A_KHD
} 9BOn8p;yz
private void fixUp(int k) { p79QEIbk=
while (k > 1) { (@T{ [\
int j = k >> 1; 5R.jhYAj
if (queue[j]>queue[k]) #%GBopv
break; kQ\l7xd
SortUtil.swap(queue,j,k); e 0$m<5
k = j; !2B~.!&
} hb1h.F
} [Ti' X#
3k_\xQ
} v^/<2/E"?4
Z 5 .cfI[
} D)L~vA/8b
}n^}%GB
SortUtil： _,F\%}
MftaT5
package org.rut.util.algorithm; S~z$=IiB
'YN:cr,V
import org.rut.util.algorithm.support.BubbleSort; fUq}dAs*K
import org.rut.util.algorithm.support.HeapSort; RigS1A\2l
import org.rut.util.algorithm.support.ImprovedMergeSort; h+q#|N
import org.rut.util.algorithm.support.ImprovedQuickSort; _^eA1}3
import org.rut.util.algorithm.support.InsertSort; PCDvEbpG
import org.rut.util.algorithm.support.MergeSort; 'q/C: Yo
import org.rut.util.algorithm.support.QuickSort; w5-^Py
import org.rut.util.algorithm.support.SelectionSort; ~ c~j
import org.rut.util.algorithm.support.ShellSort; |d42?7}
Kzt:rhiB
/** rmX5-k
* @author treeroot FbdC3G|oA
* @since 2006-2-2 C_[ d
* @version 1.0 ?<0'h{zNy
*/ |tY6+T}
public class SortUtil { S:2 xm8 i
public final static int INSERT = 1; H`3w=T+I
public final static int BUBBLE = 2; <VN< ~sz
public final static int SELECTION = 3; DB jUHirK
public final static int SHELL = 4; Q[`2?j?
public final static int QUICK = 5; .Xxxz Wyk
public final static int IMPROVED_QUICK = 6; "AWk jdj
public final static int MERGE = 7; K;`*n7=IA
public final static int IMPROVED_MERGE = 8; 1-4[w *u>
public final static int HEAP = 9; a(JtGjTf&
y </i1qM
public static void sort(int[] data) { CpgaQG^
sort(data, IMPROVED_QUICK); Ym]rG 4
} 4Im}!q5;:<
private static String[] name={ E[CvxVCx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Vhm^<I-d
}; )5<dmK@
Vz5<Gr
private static Sort[] impl=new Sort[]{ DAN"&&
new InsertSort(), u0uz~ s
new BubbleSort(), b?9'-hK<
new SelectionSort(), (d <pxx
new ShellSort(), -%VFC^'5
new QuickSort(), k]TJL9Q
new ImprovedQuickSort(), tJGPkeA
new MergeSort(), N7s9"i
new ImprovedMergeSort(), k[1[Y{n.
new HeapSort() zb9vUxN [
}; k'[\r>T
hB:+_[=Kj.
public static String toString(int algorithm){ K^I$05idi
return name[algorithm-1]; )gR3S%Ju
} dt>!=<|k
Z%-uyT@a
public static void sort(int[] data, int algorithm) { ,*p(q/kJh~
impl[algorithm-1].sort(data); !<-+}X+o8$
} x||b:2
lnxA/[`a
public static interface Sort { Oo\~'I
public void sort(int[] data); $i `@0+:
} 2[Qzx%Vp
F<6{$YI
public static void swap(int[] data, int i, int j) { (ubK i[)
int temp = data; A_6Dol=J@
data = data[j]; /#xYy^`
data[j] = temp; lFgE{;z@
} .9!&x0;
} *EtC4sP