[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; MDfC%2Q
} )7a 4yTg!~
int i1=l; zO3}c3D~q
int i2=mid+1; "Fqrk>Q~
for(int cur=l;cur<=r;cur++){ M/jdMfU
if(i1==mid+1) 42wZy|oqp
data[cur]=temp[i2++]; W+aW2
else if(i2>r) xWKUti i
data[cur]=temp[i1++]; %DhLU~VX
else if(temp[i1] data[cur]=temp[i1++]; tdn|mX#
else l"9$lF}
data[cur]=temp[i2++]; uar[D|DcD"
} 4,:)%KB"V
} ivPX_#QI
{e83 A/{
} 4m6%HV8{}[
~lH2#u>g
改进后的归并排序: =p#:v
0mI4hy
package org.rut.util.algorithm.support; I.)9:7
{AAi x
import org.rut.util.algorithm.SortUtil; z=DK(b;$z
M.KXDD#O
/** <}1GYeP
* @author treeroot P'oY+#
* @since 2006-2-2 fnudy%oo
* @version 1.0 S?#'Y*h
*/ ib~EQ?u{
public class ImprovedMergeSort implements SortUtil.Sort { gBo~NLrf
^Rmrre`uU
private static final int THRESHOLD = 10; N1X;&qZDd
IdciGS6t
/* >~@ABLp6
* (non-Javadoc) }~! D]/B
* vf['$um
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $TavvO%#
*/ 'o-J)+oa
public void sort(int[] data) { 4 zipgw
int[] temp=new int[data.length]; n2&M?MGX
mergeSort(data,temp,0,data.length-1); WmZ,c_
} *5R91@xt
~JohcU}d
private void mergeSort(int[] data, int[] temp, int l, int r) { ]H=P(Z-
int i, j, k; \-I)dMm[
int mid = (l + r) / 2; ;;n=(cM|z
if (l == r) IYB;X
return; }r:8w*47
if ((mid - l) >= THRESHOLD) )Tad]Hd"W
mergeSort(data, temp, l, mid); 5z9'~Gfb
else #oEq)Vq>g|
insertSort(data, l, mid - l + 1); ()yOK$"
if ((r - mid) > THRESHOLD) <"x *ZT
mergeSort(data, temp, mid + 1, r); Owm2/
else +c\uBrlZQ;
insertSort(data, mid + 1, r - mid); YPS,[F'B.
gEnc;qb
for (i = l; i <= mid; i++) { r%^XOw<'
temp = data; a,\GOy(q{
} +(vL~
for (j = 1; j <= r - mid; j++) { KPI[{T\`ZM
temp[r - j + 1] = data[j + mid]; >2;KPV0H
} G>W:3y
int a = temp[l]; Q?-uJ1J
int b = temp[r]; scR+F'M
for (i = l, j = r, k = l; k <= r; k++) { 30L/-+r1
if (a < b) { |sV@j_TX
data[k] = temp[i++]; ((tWgSZ3
a = temp; K${CHKFf
} else { u %&4[zb
data[k] = temp[j--]; ~,reS:9RZ
b = temp[j]; {aWfD XB1
} ~Ec@hz]js
} tq5o
} xwu,<M v`
ceNJXK
/** <^B!.zQ
* @param data LZrkFkiC
* @param l (JeRJ4
* @param i _ +A$6l
*/ K@;ls
private void insertSort(int[] data, int start, int len) { iuWw(dJk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o1@. <Q+}
} }7/Ob)O
} &^@IAjxn
} gBXJ/BW$y
} '2c4 4F)i
w}Xy;0c
堆排序： O<6!?1|KP
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package org.rut.util.algorithm.support; 7\JA8mm
s&Qil07Vl
import org.rut.util.algorithm.SortUtil; !8Q9RnGn
(1?k_!)T
/** wq`\p['Q,
* @author treeroot p?eQN Y
* @since 2006-2-2 HZzdelo
* @version 1.0 ,Y2){8#l
*/ J|[`8 *8
public class HeapSort implements SortUtil.Sort{ Ov8{ny
px.]m-
/* (non-Javadoc) aFwfF^\(|,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fO$~jxR.
*/ Q-Rt
public void sort(int[] data) { )z2hyGX
MaxHeap h=new MaxHeap(); [bJAh ` I
h.init(data); {t&+abY
for(int i=0;i h.remove(); p&,2@(Q
System.arraycopy(h.queue,1,data,0,data.length); kR|(hA,$N
} z}*74lhF
;/<J&#2.
private static class MaxHeap{ v0S7 ]?_
Y([vma>U]
void init(int[] data){ sBD\;\I
this.queue=new int[data.length+1]; z3p#`
for(int i=0;i queue[++size]=data; '8bT9
fixUp(size); B=J/HiwV)
} Bc2PF;n
} [P"R+$"
Vch!&8xii
private int size=0; k84JDPu#
7q,M2v;
private int[] queue; ~`x<;Ts
@^93q
public int get() { @Xe[5T
return queue[1]; FR@##i$
} B~2\v%J
_Vxk4KjP5
public void remove() { ij~023$DTt
SortUtil.swap(queue,1,size--); 6sp?'GO`~
fixDown(1); nH]F$'rtA
} )x*pkE**c
file://fixdown UHW;e}O5
private void fixDown(int k) { SvR? nN|
int j; Gr?[s'Ze
while ((j = k << 1) <= size) { (~FLG I
if (j < size %26amp;%26amp; queue[j] j++; j(maj
if (queue[k]>queue[j]) file://不用交换 u6(>?r-
break; ;qT7BUh(%
SortUtil.swap(queue,j,k); [{!5{k!
k = j; 1p9+c~4l:
} }];_ug* "
} ^04|tda
private void fixUp(int k) { RW. >;|m
while (k > 1) { /K]<7
int j = k >> 1; oZ(T`5
if (queue[j]>queue[k]) {|J'd+
break; 'F@#.Op`
SortUtil.swap(queue,j,k); ]1<O [d
k = j; >HXmpu.O
} +k4SN
} h&6v&%S/L
*m[ow s
} <C9_5Ce~
8L7ZWw d
} #7A_p8
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SortUtil： zbDM+;
' Z}/3 dp
package org.rut.util.algorithm; Dj9).lgc
Zu/}TS9bi
import org.rut.util.algorithm.support.BubbleSort; 8?rRLM4
import org.rut.util.algorithm.support.HeapSort; }6Uw4D61
import org.rut.util.algorithm.support.ImprovedMergeSort; s~(iB{-
import org.rut.util.algorithm.support.ImprovedQuickSort; @gZ<!g/vza
import org.rut.util.algorithm.support.InsertSort; )} H46
import org.rut.util.algorithm.support.MergeSort; yS[Z%]bvU
import org.rut.util.algorithm.support.QuickSort; c{u~=24;%#
import org.rut.util.algorithm.support.SelectionSort; 0-W{(xy@4
import org.rut.util.algorithm.support.ShellSort; IJAWG
e/;chMCq
/** B^SD5
* @author treeroot V3u[{^^f
* @since 2006-2-2 ~e<v<92Xu
* @version 1.0 a9GLFA8Vq
*/ Vnv9<=R
public class SortUtil { ~agzp`!M
public final static int INSERT = 1; ^{T3lQvt
public final static int BUBBLE = 2; 2I#4jy/g
public final static int SELECTION = 3; JL4\%
public final static int SHELL = 4; Ppzd.=E
public final static int QUICK = 5; +89s+4Jn
public final static int IMPROVED_QUICK = 6; bt,^-gt@
public final static int MERGE = 7; ='0f#>0Q
public final static int IMPROVED_MERGE = 8; #D$vH
public final static int HEAP = 9; *|RQ )
siHS@S
public static void sort(int[] data) { lnFOD+y9
sort(data, IMPROVED_QUICK); ~\%MJ3
} #w4=kWJ[
private static String[] name={ I9`R LSn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /IS j0"/$
}; I"]5B
^ )Lh5
private static Sort[] impl=new Sort[]{ Xh/i5}5 t
new InsertSort(), ,f4mFL0~N
new BubbleSort(), bg'B^E3
new SelectionSort(), iTt"Ik'
new ShellSort(), wR?M2*ri
new QuickSort(), oOhm`7iy
new ImprovedQuickSort(), e4V4%Qw
new MergeSort(), AT:T%a:G?
new ImprovedMergeSort(), d))(hk:
new HeapSort() .3%eSbt0
}; :Gh* d)
@83h/Wcxd
public static String toString(int algorithm){ uw@z1'D[i"
return name[algorithm-1]; n2Oi< )
} HN\Zrb
>o=3RB=Fh
public static void sort(int[] data, int algorithm) { _be*B+?2t
impl[algorithm-1].sort(data); W%f:+s}cI
} Ds$8$1=L=k
Hut au^l
public static interface Sort { zn T85#]\@
public void sort(int[] data); "-4V48ci
} 66?!"w
oQC*d}_E}
public static void swap(int[] data, int i, int j) { l[O!_bH
int temp = data; 2roPZj
data = data[j]; x+vNA J
data[j] = temp; h94SLj]
} ~ySmN}3~'
} r3l}I6