[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; `oAW7q)~
} g6yB6vk
int i1=l; bpOYHc6,*`
int i2=mid+1; 'g">LQ~a+
for(int cur=l;cur<=r;cur++){ @Y?#Sl*
if(i1==mid+1) e-~N"
data[cur]=temp[i2++]; _H9 MwJ
else if(i2>r) Mhm@R@
data[cur]=temp[i1++]; w{{gu1#]G
else if(temp[i1] data[cur]=temp[i1++]; .nO\kgoK
else d}Xr}
data[cur]=temp[i2++]; fIM,lt
} AL[KpY
} Tg7an&#
FX;QG94!
} N(O9&L*4fm
%9 SJ E
改进后的归并排序: #9=Vg
'%>=ZhO
package org.rut.util.algorithm.support; :vYYfs&
E}%B;"b/Tj
import org.rut.util.algorithm.SortUtil; {Je[ZQ$
N'F77 .
/** gBd]B03
* @author treeroot *tGY6=7O
* @since 2006-2-2 *}Xf!"I#]N
* @version 1.0 :Oy%a'w
*/ [m->5H
public class ImprovedMergeSort implements SortUtil.Sort { SDL7<ZaE
Eu0akqZ
private static final int THRESHOLD = 10; 'Oxy$U
XUrXnz|>
/* PG2:~$L0
* (non-Javadoc) ]yV!
* )"qa kT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) at@G/?
*/ *$#W]bO
public void sort(int[] data) { <g-9T-Ky
int[] temp=new int[data.length]; }?lrU.@zg
mergeSort(data,temp,0,data.length-1); sm9k/(-
} _qU4Fadgm
wDw[RW3
private void mergeSort(int[] data, int[] temp, int l, int r) { N[?N5~jG
int i, j, k; OwuE~K7b{
int mid = (l + r) / 2; Fzm*Pz3
if (l == r) FOb0uj=(v
return; c7?_46J
if ((mid - l) >= THRESHOLD) O8^A5,2@3>
mergeSort(data, temp, l, mid); ,yC-+VL
else #OZ>V3k
insertSort(data, l, mid - l + 1); CZ8KEBl
if ((r - mid) > THRESHOLD) rDl*d`He!
mergeSort(data, temp, mid + 1, r); ]{!U@b
else eFipIn)b
insertSort(data, mid + 1, r - mid); bT</3>+C
/Jta^Bj
for (i = l; i <= mid; i++) { Y&`=jDI
temp = data; W'els)WJ|x
} hC:n5]K
for (j = 1; j <= r - mid; j++) { JR'
temp[r - j + 1] = data[j + mid]; vp1941P
} Mc@e0
int a = temp[l]; 8."]//V
int b = temp[r]; xP_cQwm`1
for (i = l, j = r, k = l; k <= r; k++) { Y21g{$~Q{
if (a < b) { AW%50V
data[k] = temp[i++]; [<7@{;r
a = temp; %W'v}p
} else { #akpXdXs
data[k] = temp[j--]; -N6f1>}pE
b = temp[j]; ; a/X<
} %) /s;Q,
} t9nqu!);
} [v7F1@6b
wrviR
/** DP[IZC
* @param data ,aOl_o -&
* @param l _> f`!PlB|
* @param i a Ve'ry
*/ N1Ng^aY0
private void insertSort(int[] data, int start, int len) { B`YTl~4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); LU \i0|i|
} #r$cyV!k
} ks&*O!h
} Ac96 [
} ^"2i
?:pP8/y
堆排序： ~Uj=^leYO
;m0~L=w
package org.rut.util.algorithm.support; :Hn6b$Vy8
:uP,f<=)K
import org.rut.util.algorithm.SortUtil; kh!FR u h
[O$Wa:< 0x
/** VdPtPq1
* @author treeroot ?OId\'q
* @since 2006-2-2 O $LfuL
* @version 1.0 rr+|Zt Y
*/ Vn7*JS
public class HeapSort implements SortUtil.Sort{ vV6<^W:9F
Sw:7pByjI
/* (non-Javadoc) &[_g6OL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jk&3%^P{m
*/ neB\q[k
public void sort(int[] data) { d.3E[AJa(
MaxHeap h=new MaxHeap(); eS{!)j_^
h.init(data); k\wW##=v
for(int i=0;i h.remove(); "76]u)
System.arraycopy(h.queue,1,data,0,data.length); <W|3\p6
} H6kR)~zhf
3e #p@sB
private static class MaxHeap{ +:8fC$vVfC
-mAUo;O
void init(int[] data){ >x/z7v?^I
this.queue=new int[data.length+1]; Bs13^^hu
for(int i=0;i queue[++size]=data; SlgN&{Bk
fixUp(size); -5 RD)(d
} ccNd'2P
} |)nZ^Cc
+?F[/?s5qz
private int size=0; -1 FPkp
LE&RY[
private int[] queue; W_||6LbZy
a!ud{Dx
public int get() { 46$._h P
return queue[1]; vY4\59]P
} R_(tjkT
hwu]Er.gn
public void remove() { mi ik%7>W
SortUtil.swap(queue,1,size--); B,<da1(a
fixDown(1); %9w::hav
} C^3 <={
file://fixdown O#b6mKPt;t
private void fixDown(int k) { 0QFS
int j; zxMXXm;
while ((j = k << 1) <= size) { ^2+yHw
if (j < size %26amp;%26amp; queue[j] j++; p%#<D9S
if (queue[k]>queue[j]) file://不用交换 FFV `P
break; U}&2k
SortUtil.swap(queue,j,k); 1jCLO}
k = j; `lQ3C{}
} $Oq^jUJ
} 5)FJ:1-
private void fixUp(int k) { i;]"n;>+/
while (k > 1) { {,3>"
int j = k >> 1; 3XL#0\im?s
if (queue[j]>queue[k]) Qr1"Tk7s
break; ~Am,%"%\
SortUtil.swap(queue,j,k); Cf TfL3(J
k = j; ~KHVY)@P
} O9vQp
} 5pj22 s
E'G4Y-
} N8k00*p65
6 2'j!"xv
} >v:y?A,
#EO9UW5
SortUtil： t=|evOz]
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package org.rut.util.algorithm; &{ay=Mj
5XO;N s
import org.rut.util.algorithm.support.BubbleSort; T29Dt
import org.rut.util.algorithm.support.HeapSort; YX=a#%vrl
import org.rut.util.algorithm.support.ImprovedMergeSort; kv3E4,<9
import org.rut.util.algorithm.support.ImprovedQuickSort; 3_txg>P"
import org.rut.util.algorithm.support.InsertSort; 4~y(`\0?4
import org.rut.util.algorithm.support.MergeSort; tro7Di2Q
import org.rut.util.algorithm.support.QuickSort; ?h.wK
import org.rut.util.algorithm.support.SelectionSort; TX$r`~
import org.rut.util.algorithm.support.ShellSort; G]D+Sl4<7i
[f)cL6AeF
/** \!>3SKs(e
* @author treeroot *#E FsUw
* @since 2006-2-2 cU;iUf
* @version 1.0 Q 7
*/ Z8zmHc"IH
public class SortUtil { hHN'w73z
public final static int INSERT = 1; {/"2Vk<H8
public final static int BUBBLE = 2; )#P; x"
public final static int SELECTION = 3; 1>*#%R?W
public final static int SHELL = 4; L0*nm.1X
public final static int QUICK = 5; u\ #"L
public final static int IMPROVED_QUICK = 6; a&tSj35*6
public final static int MERGE = 7; ]4~lYuI4
public final static int IMPROVED_MERGE = 8; K#EvFs`s;
public final static int HEAP = 9; p!>oo1&
vtw6FX_B
public static void sort(int[] data) { =G]1LTI
sort(data, IMPROVED_QUICK); FB _pw!z
} s}j{#xT
private static String[] name={ A9f)tqbc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" uxW~uEh
}; Z9MdD>uwi
%C$%!C
private static Sort[] impl=new Sort[]{ kgnmGuka
new InsertSort(), ?!9)q.bW
new BubbleSort(), yOphx07 (
new SelectionSort(), !u_Y7i3^
new ShellSort(), }lh I\q
new QuickSort(), &S( .GdEf
new ImprovedQuickSort(), VSrr`B
new MergeSort(), }2<r,
new ImprovedMergeSort(), Anscr
new HeapSort() <0H"|:W>I]
}; ]DOX?qI i
mX\TD0$d
public static String toString(int algorithm){ n1~o1
return name[algorithm-1]; xgpi-l
} 8dZ0rPd?
3^R&:|,
public static void sort(int[] data, int algorithm) { x$IX5:E#e
impl[algorithm-1].sort(data); bLe<G
} ,8:(OB|a
_z'u pb&
public static interface Sort { i 7_ _
public void sort(int[] data); /e7O$L)
} /<HRwG\w
P/c&@_b
public static void swap(int[] data, int i, int j) { fIj|4a+
int temp = data; nN*w~f"
data = data[j]; {k>Ca
data[j] = temp; PE~G=1x3
} >H'4{|
} {7$c8i