[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; !4?QR
} y3^>a5z!x
int i1=l; acPX2B[jJ
int i2=mid+1; D|8Pe{`
for(int cur=l;cur<=r;cur++){ r+yl{
if(i1==mid+1) wjRv=[
data[cur]=temp[i2++]; E1"H(m&6
else if(i2>r) y)Y0SY1\j
data[cur]=temp[i1++]; q'% cVM
else if(temp[i1] data[cur]=temp[i1++]; #9's^}i
else r_p4pxs
data[cur]=temp[i2++]; nQHQVcDs8
} 54^2=bp
} U?WS\Jji3!
%UO ;!&K
} Z(~v{c %<
xDsB%~
改进后的归并排序: A;ti$jy
M%aA1!@/
package org.rut.util.algorithm.support; f@)GiLC'"
3|Vh[iAa\
import org.rut.util.algorithm.SortUtil; v\#1&</qd^
mO?yrM *
/** saPg2N,
* @author treeroot :m{;<LRV
* @since 2006-2-2 Bh%Yu*.f
* @version 1.0 ah8xiABa
*/ ?gGmJl
public class ImprovedMergeSort implements SortUtil.Sort { HW"';M%
u3VSS4RG%
private static final int THRESHOLD = 10; d[t+iBP;)
_d J"2rx
/* ;oT!\$Mu
* (non-Javadoc) +eIX{J\s
* 79Y;Zgv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f,s1k[w/;
*/ }zE Qrfl
public void sort(int[] data) { IW~q,X+`V
int[] temp=new int[data.length]; UpoTXAD}k
mergeSort(data,temp,0,data.length-1); a6/$}lCq
} IXJ6w:E
8s@k0T<O
private void mergeSort(int[] data, int[] temp, int l, int r) { C"JFN(f
int i, j, k; $z":E(oy
int mid = (l + r) / 2; #]MV
if (l == r) Y!0ZwwW
return; k04CSzE"%
if ((mid - l) >= THRESHOLD) eGEeWJ}[$
mergeSort(data, temp, l, mid); ;vkk$ -
else ]NRQM8\
insertSort(data, l, mid - l + 1); Eg/=VBtc
if ((r - mid) > THRESHOLD) 9Z_!}eY2mc
mergeSort(data, temp, mid + 1, r); wV&UB@
else Q"Ur*/-U
insertSort(data, mid + 1, r - mid); s6F^z\6
O"c@x:i
for (i = l; i <= mid; i++) { -h|YS/$f
temp = data; H\[:uUK5\
} ndB [f
for (j = 1; j <= r - mid; j++) { \ld{Z;e
temp[r - j + 1] = data[j + mid]; C3#mmiL-
} ~A-1x!YiU
int a = temp[l]; ?_<14%r;
int b = temp[r]; !IUH 5
for (i = l, j = r, k = l; k <= r; k++) { >AUj4d
if (a < b) { &i8UPp%
data[k] = temp[i++]; 'U%L\v,
a = temp; )V6<'>1WZ
} else { #1#?k
data[k] = temp[j--]; k>aWI
b = temp[j]; o$[alh;c+W
} t(sQw '>
} '_`O&rbT
} &|j^?ro6
z~R:!O-
/** :Dn{
* @param data UwQyAD]Ht
* @param l #sg^l>/*
* @param i m~xO;_m
*/ 6t0-u~
private void insertSort(int[] data, int start, int len) { *(pmFEc
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); X61p xPa
} fg8"fbG`:
} )K"7=TvY
} EWX!:BKf
} p0b2n a !
no`>r}C
堆排序： >kN%R8*Sx
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package org.rut.util.algorithm.support; q,->E<8
9bVPMq7}i
import org.rut.util.algorithm.SortUtil; U$+G9
Jd0I!L
/** MRn;D|Q
* @author treeroot D3MRRv#
* @since 2006-2-2 U`HSq=J
* @version 1.0 :t#N.[=&#
*/ 0**.:K<i
public class HeapSort implements SortUtil.Sort{ nTd[-3o
wFHbz9|@I
/* (non-Javadoc) rcx'`CIJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F\"`^`(O
*/ yo=0Ov
public void sort(int[] data) { x+V@f~2F
MaxHeap h=new MaxHeap(); PE7D)!d T
h.init(data); fZ6"DJZ
for(int i=0;i h.remove(); 1p%75VW
System.arraycopy(h.queue,1,data,0,data.length); {G^f/%
} VBe.&b8
XzH"dDAVE
private static class MaxHeap{ c|,6(4j>$
rgOc+[X
void init(int[] data){ [fjP.kw;J
this.queue=new int[data.length+1]; ( ;(DI^Un8
for(int i=0;i queue[++size]=data; dRXEF6G
fixUp(size); FWJhi$\:D]
} .dvOUt I[
} -%g&O-i\
L=1~)>mP
private int size=0; |[lmW%
BA 9c-Ay
private int[] queue; Qe6'W
vXP+*5d/ K
public int get() { y {PUklq
return queue[1]; +YA,HhX9
} zP(UaSXz/
d2!A32m
public void remove() { B{^ojV;]m
SortUtil.swap(queue,1,size--); j$u=7Z&E
fixDown(1); [G=+f6 a
} ^jiYcg@_[
file://fixdown E#L"*vh
private void fixDown(int k) { $ZEwz;HNo
int j; rCTH 5"
while ((j = k << 1) <= size) { &LD=Zp%
if (j < size %26amp;%26amp; queue[j] j++; 9BA*e-[
if (queue[k]>queue[j]) file://不用交换 [IgB78_$
break; D')m8:>
SortUtil.swap(queue,j,k); &~SPDiu.t
k = j; !9/1_Bjv
} ;*Z.|?3MM
} g=gWkN <
private void fixUp(int k) { 2VgDM6h
while (k > 1) { d>f.p"B.gj
int j = k >> 1; 0kp#+&)+
if (queue[j]>queue[k]) Q-qM"8I
break; P t)Ni
SortUtil.swap(queue,j,k); 8>KBh)q
k = j; k-`5TmW
} ZI0C%c.~
} t;?TXAA
f L}3I(VK
} IB sQaxt.
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} ofu {g
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SortUtil： Q#2gjR r
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package org.rut.util.algorithm; ~}g"Fe
~$PQ8[=
import org.rut.util.algorithm.support.BubbleSort; s:fy *6=[Z
import org.rut.util.algorithm.support.HeapSort; MBO3y&\S4
import org.rut.util.algorithm.support.ImprovedMergeSort; '0juZ~>}
import org.rut.util.algorithm.support.ImprovedQuickSort; TO|&}sDh
import org.rut.util.algorithm.support.InsertSort; Z|h&Zd1z
import org.rut.util.algorithm.support.MergeSort; =mq02C~y
import org.rut.util.algorithm.support.QuickSort; 7P!Hryy
import org.rut.util.algorithm.support.SelectionSort; k^vsQ'TD
import org.rut.util.algorithm.support.ShellSort; @o g&l;
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/** +$b_,s
* @author treeroot wP <)
* @since 2006-2-2 ]0+5@c
* @version 1.0 x<S?"
*/ 5dPPm%U{
public class SortUtil { tsLi5;KA]
public final static int INSERT = 1; _^;;vR%
public final static int BUBBLE = 2; \U0p?wdr:
public final static int SELECTION = 3; >\x
public final static int SHELL = 4; <Kq4thR
public final static int QUICK = 5; ;Rz+4<
public final static int IMPROVED_QUICK = 6; ZMI!Sl
public final static int MERGE = 7; 9AxeA2/X
public final static int IMPROVED_MERGE = 8; KqE5{ q
public final static int HEAP = 9; BJ]4j-^o
:JEzfI1
public static void sort(int[] data) { <DM /"^*
sort(data, IMPROVED_QUICK); OjUZ-_J
} &f:"p*=a\
private static String[] name={ '4L0=G:A<q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2[#7YWs
}; (eOzntp8
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private static Sort[] impl=new Sort[]{ 4Hk eXS.
new InsertSort(), Wd R~
new BubbleSort(), Q|O! cEW/
new SelectionSort(), |Zn|?#F
new ShellSort(), $eI=5
new QuickSort(), Fk(+S:{yQ
new ImprovedQuickSort(), &6yh4-(7
new MergeSort(), }qa8o
new ImprovedMergeSort(), R`_RcHY:
new HeapSort() h]DS$WZ
}; 3%g\)Cs
R43yr+p
public static String toString(int algorithm){ ^hpdre"
return name[algorithm-1]; aQzu[N
} }=+J&cR
?3x7_=4t@
public static void sort(int[] data, int algorithm) { "-pQL )f
impl[algorithm-1].sort(data); 4t%g:9]vr
} g^V4+3v|a'
rr@S|k:|
public static interface Sort { ~.FZF
public void sort(int[] data); e)Be*J]4
} 4FWb5b!A=
XJs*DK
public static void swap(int[] data, int i, int j) { 2itJD1;
int temp = data; =lE_ Q[P
data = data[j]; vw;GbQH(
data[j] = temp; xcF:moL
} 3kAhvL
} 7V^\fh5~