[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; jU7[z$GX
} ""XAUxo
int i1=l; '"\'<>Be
int i2=mid+1; aK95&Jyw&
for(int cur=l;cur<=r;cur++){ hc+B+-,
if(i1==mid+1) >X eXd{$
data[cur]=temp[i2++]; ,ofE*Wt
else if(i2>r) 'vZIAnB8
data[cur]=temp[i1++]; e,VF;Br
else if(temp[i1] data[cur]=temp[i1++]; ,z>-_HOnw
else ZQ+DAX*MS
data[cur]=temp[i2++]; 83SK<V6
} E:ci/09wD
} GCq4{_B\Q
L!zdrCM
} vdAd@Z~\
Z\EA!Cs3
改进后的归并排序: pCrm `hy(
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package org.rut.util.algorithm.support; lTP#6zqfv
~F@n `!c
import org.rut.util.algorithm.SortUtil; o2U5irU
<j>;5!4!}
/** V){Io_"
* @author treeroot r6'dEa
* @since 2006-2-2 u*;H$&
* @version 1.0 Wm`*IBWA
*/ )=d)j^t9
public class ImprovedMergeSort implements SortUtil.Sort { 7xv9v1['
jhQoBC>:
private static final int THRESHOLD = 10; *bf 5A9
?z#*eoPr
/* Fd\uTxykp
* (non-Javadoc) E V)H>kM
* l^nvwm`f#:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mV`R'*1UC
*/ H~nX!sO
public void sort(int[] data) { uJ -$i
int[] temp=new int[data.length]; ?%UiW7}j';
mergeSort(data,temp,0,data.length-1); oJr+RO
} p|2GPrA]aL
o]Ne|PEpO
private void mergeSort(int[] data, int[] temp, int l, int r) { \ *[Ht!y
int i, j, k; T@U,<[,
int mid = (l + r) / 2; BJWlx*U]
if (l == r) }7 +%k/
return; /go[}X5QR[
if ((mid - l) >= THRESHOLD) qe{;EH*
mergeSort(data, temp, l, mid); 8IRKCuV
else n|&=6hiI
insertSort(data, l, mid - l + 1); #jg-q|nd
if ((r - mid) > THRESHOLD) X+N5iT
mergeSort(data, temp, mid + 1, r); P@ew' JL%
else 8`urkEI^r
insertSort(data, mid + 1, r - mid); ub-e!{
FEu"b@v
for (i = l; i <= mid; i++) { SfC* ZM}<
temp = data; ||QK)$"
} O}Pqbx&
for (j = 1; j <= r - mid; j++) { cMZy~>
temp[r - j + 1] = data[j + mid]; 2SC-c `9)
} M.t,o\xl
int a = temp[l]; h`\$8oV
int b = temp[r]; UHvA43
for (i = l, j = r, k = l; k <= r; k++) { lWj*tnnn[
if (a < b) { vLHn4>J,R
data[k] = temp[i++]; uK$ Xqo%L
a = temp; ~SBb2*ID
} else { {{Ox%Zm
data[k] = temp[j--]; mu{C>w_Rz
b = temp[j]; (~N?kh:
} S,6/X.QBv
} #J&3Zds
} 5tpC$4m
2I_ yUt-
/** By8SRWs
* @param data ;!S5P(
* @param l U'ctO%
* @param i X/2GTU7?
*/ 8Lx/ZGy
private void insertSort(int[] data, int start, int len) { VfpT5W<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ydYsmTr
} r/'!#7dLG-
} |{kbc0*
} lr~ |=}^
} ial{A6X
4x[_lsj
堆排序： rIcgf1v70
yjL+1_"B
package org.rut.util.algorithm.support; ~:7y!=8#
R)JH D7 1
import org.rut.util.algorithm.SortUtil; ub~ t}
^.8~}TT-U
/** z~vcwiYAP
* @author treeroot GWuKDq
* @since 2006-2-2 G)I` M4}*n
* @version 1.0 }6-olVg
*/ Yft [)id
public class HeapSort implements SortUtil.Sort{ C}mhnU@
,H+Y1N4W(
/* (non-Javadoc) U[x$QG6m!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4%~*}
*/ mN]WjfII
public void sort(int[] data) { ;UTM9.o[
MaxHeap h=new MaxHeap(); ?g4Rk9<!i
h.init(data); V/2NIh
for(int i=0;i h.remove(); '[liZCg
System.arraycopy(h.queue,1,data,0,data.length); J^jd@E
} ?s$d("~
GxD`M2
private static class MaxHeap{ #;ObugY,
{f-O~P<Z4
void init(int[] data){ OgIRI8L
this.queue=new int[data.length+1]; GD.Ss9_h1
for(int i=0;i queue[++size]=data; }Mt)57rU
fixUp(size); 0)d='3S
} _LwF:19Il
} stajTN*J
N? Jy
private int size=0; 3#t#NW*e
s,#We} bv
private int[] queue; 9zqo!&
v[ML=pL
public int get() { 4Z%1eOR9V
return queue[1]; <L4$f(2
} 3S+9LOrhY
PF/K&&9}
public void remove() { #)~u YQ
SortUtil.swap(queue,1,size--); 63l& ihj
fixDown(1); bKsjbYuo
} a`xAk^w+
file://fixdown O$6&4p*F.
private void fixDown(int k) { .c}+kHv
int j; hJ`Gu7
while ((j = k << 1) <= size) { q-;Y }q
if (j < size %26amp;%26amp; queue[j] j++; ]m1p<*0I$
if (queue[k]>queue[j]) file://不用交换 SgxrU&::
break; i%.NP;Qq]M
SortUtil.swap(queue,j,k); R`<2DC>h9
k = j; 7BU7sQjs
} ?HPAX
} E& 6I`8
private void fixUp(int k) { z7IJSj1gQI
while (k > 1) { J/e]
int j = k >> 1; Wx]Xa]-
if (queue[j]>queue[k]) ]Pe>T&
break; :po6%}hn
SortUtil.swap(queue,j,k); ./XX
k = j; SZe55mK`
} ;@qS#7SRB
} >Vt2@Ee
rz_W]/G-P
} nQOdM#dP
I?g}q,!]
} IXtG 36O
Sk7R;A
SortUtil： -)(=~|,Pq/
g=nb-A{#
package org.rut.util.algorithm; _:Xmq&<W
K0( S%v|,}
import org.rut.util.algorithm.support.BubbleSort; i!}k5k*Z
import org.rut.util.algorithm.support.HeapSort; nktGO
import org.rut.util.algorithm.support.ImprovedMergeSort; ZAfuW^r
import org.rut.util.algorithm.support.ImprovedQuickSort; eg/itty
import org.rut.util.algorithm.support.InsertSort; ].xSX0YQ%
import org.rut.util.algorithm.support.MergeSort; %:`v.AG
import org.rut.util.algorithm.support.QuickSort; C5V}L
import org.rut.util.algorithm.support.SelectionSort; /jJD {
import org.rut.util.algorithm.support.ShellSort; *]U`]!Esp
N\__a~'0p
/** /5Qh*.(S
* @author treeroot Qb?a[[3
* @since 2006-2-2 !gW`xVGv
* @version 1.0 r craf4%
*/ "dIWHfQB
public class SortUtil { @ywtL8"1~
public final static int INSERT = 1; RBf#5VjOG!
public final static int BUBBLE = 2; FCNYfjB%
public final static int SELECTION = 3; 5n2!Y\
public final static int SHELL = 4; C lf;+G0
public final static int QUICK = 5; w*XM*yJHU
public final static int IMPROVED_QUICK = 6; &6OY^6<
public final static int MERGE = 7; af |mk@
public final static int IMPROVED_MERGE = 8; 6k;5T
public final static int HEAP = 9; 6vbKKn`ST
E<+ G5j
public static void sort(int[] data) { ~{lb`M^]h
sort(data, IMPROVED_QUICK); X<8|uP4
} I ==)a6^
private static String[] name={ 'qT;Eht5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +Xw%X3o)
}; dQ{qA(m
>&;J/ME
private static Sort[] impl=new Sort[]{ ]'Eg2(wy
new InsertSort(), id9QfJ9t
new BubbleSort(), G3TS?u8Q
new SelectionSort(), dT'}:2
new ShellSort(), *B!Ox}CI.L
new QuickSort(), .q MxShUU
new ImprovedQuickSort(), &j:prc[W
new MergeSort(), 'e]>lRZ
new ImprovedMergeSort(), 8[J%TWq%9
new HeapSort() ]dGH i \
}; 0'*{BAWx
ek<B=F
public static String toString(int algorithm){ of*T,MUI
return name[algorithm-1]; uQdH():
} 3v_j*wy
/Q@4HV
public static void sort(int[] data, int algorithm) { eG(YORkR
impl[algorithm-1].sort(data); B)@Xz<Q
} +I5\`By=
X8Z) W?vu
public static interface Sort { ]'xci"qV`
public void sort(int[] data); gBV4IQ
} GEy7Vb)
cwvJH&%0
public static void swap(int[] data, int i, int j) { 5lHt~hB\
int temp = data; a({Rb?b
data = data[j]; wwdmz;0S
data[j] = temp; P<R^eLZ<&
} i/_rz.c~3
} f91]0B`C