[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; 3"pl="[*
} (XDK&]U
int i1=l; >FRJvZ6
int i2=mid+1; ?7:?OX
for(int cur=l;cur<=r;cur++){ ly)b=ph&
if(i1==mid+1) +#/`4EnI
data[cur]=temp[i2++]; ,svj(HP$
else if(i2>r) nGdEJ
data[cur]=temp[i1++]; 01-n_ $b
else if(temp[i1] data[cur]=temp[i1++]; \XUG-\$p
else ]F]!>dKA
data[cur]=temp[i2++]; n~wNee
} t;~H6
} " ~X;u8m
&d8z`amP
} ; {P"~(S%
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改进后的归并排序: 9u->.O: p
^z^ UFW
package org.rut.util.algorithm.support; B9-Nb 4
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import org.rut.util.algorithm.SortUtil; NSPa3NE
I9 R\)3"
/** `iiZ
* @author treeroot #Ang8O@y
* @since 2006-2-2 MDo4{7
* @version 1.0 >;;tX3(
*/ SuHv{u45
public class ImprovedMergeSort implements SortUtil.Sort { 6,C,LT2^(
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private static final int THRESHOLD = 10; 2[*r9%W
eqL~h1^Co
/* 9_6.%qj&
* (non-Javadoc) PUdJ>U
* V`n;W6Q17
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zy -&g:
*/ Jhyb{i8RR
public void sort(int[] data) { 3gn)q>Xj$
int[] temp=new int[data.length]; A!K/92[#@
mergeSort(data,temp,0,data.length-1); W:8*Z8?7
} BE;J/
.o2]ndT/J
private void mergeSort(int[] data, int[] temp, int l, int r) { sp0j2<$a
int i, j, k; CXQPbt[5
int mid = (l + r) / 2; D{](5?$`|
if (l == r) $hkMJ),T~
return; "\'g2|A
if ((mid - l) >= THRESHOLD) }^Unx W
mergeSort(data, temp, l, mid); 9Q#eu~R
else ohdWEU,
insertSort(data, l, mid - l + 1); fC2
if ((r - mid) > THRESHOLD) [U]ouh)
mergeSort(data, temp, mid + 1, r); &?@gUk74"
else }+L!r53g6
insertSort(data, mid + 1, r - mid); GnE%C2L-
%G<!&E!0h
for (i = l; i <= mid; i++) { P}%0YJ$6
temp = data; cm8-L[>E
} ::y+|V/
for (j = 1; j <= r - mid; j++) { s_=/p5\
temp[r - j + 1] = data[j + mid]; 1`tE Hu.
} >+[uV^2[
int a = temp[l]; >b |TaQ
int b = temp[r]; R;P>_ei(LK
for (i = l, j = r, k = l; k <= r; k++) { -$(,&qyk
if (a < b) { K)Nbl^6x
data[k] = temp[i++]; O?8^I<
a = temp; P&/PCSf
} else { h^P>,dy0
data[k] = temp[j--]; c3gy{:lb
b = temp[j]; Wt&tu2
} .(Gq9m[~8H
} SWjOJjn
} X517PT8O
,w|f*L$
/** k;p:P ?s5Y
* @param data 5|ih>?C/(
* @param l ex8mA6g
* @param i .`!|^h%0
*/ D-.XSIEMu
private void insertSort(int[] data, int start, int len) { `zHtfox!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,CguY/y
} W'\{8&:!
} t;9f7~
} ,TD@s$2x
} ]Au78Yom
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堆排序： ?lzg )88I
vJ$#m_aa
package org.rut.util.algorithm.support; cpB$bC](
:N#gNtC)b
import org.rut.util.algorithm.SortUtil; !!ZNemXct$
8#S|jBV
/** v709#/cR
* @author treeroot 0-EhDGa]r
* @since 2006-2-2 3ug{1M3
* @version 1.0 MpM-xz~
*/ @R>4b
public class HeapSort implements SortUtil.Sort{ GmN} +(
u>H^bCXI
/* (non-Javadoc) \LRno3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L<Q1acoZm
*/ #rzq9}9tB
public void sort(int[] data) { p^+k:E>U
MaxHeap h=new MaxHeap(); ecA[
h.init(data); 8ON$M=Ze$
for(int i=0;i h.remove(); ]j0v.[SX
System.arraycopy(h.queue,1,data,0,data.length); .l5y!?
} nH*U
RX:\@c&
private static class MaxHeap{ $lci{D32,
["GC
void init(int[] data){ =35^k-VS
this.queue=new int[data.length+1]; wQ[~7 ,o
for(int i=0;i queue[++size]=data; ~f2H@#
fixUp(size); c]F$$BT
} :{%6<j
} {AqN@i
=jip* E^
private int size=0; +Tde#T&[
"$PbpY
private int[] queue; #B|`F?o
~!j1</$_
public int get() { |4pE"6A
return queue[1]; |vA3+kG
} k}l5v)m
}Gr5TDiV0\
public void remove() { ~R7rIP8Wr
SortUtil.swap(queue,1,size--); / O6n[qj|
fixDown(1); \dCoY0Z ;
} ,ju1:`
file://fixdown pq+Gsu1^
private void fixDown(int k) { 3D+>NB
int j; q .nsGbl
while ((j = k << 1) <= size) { ;^lVIS%&{
if (j < size %26amp;%26amp; queue[j] j++; ^o,Hu#
if (queue[k]>queue[j]) file://不用交换 {;);E
break; ~d?7\:n
SortUtil.swap(queue,j,k); @~'c(+<3
k = j; %JBp~"
} Y(78qs1w
} ~HI|t2C
private void fixUp(int k) { %#2[3N{
while (k > 1) { tx Lo=
int j = k >> 1; 7EOn4I2@[
if (queue[j]>queue[k]) #*j
break; 1C^6'9o
SortUtil.swap(queue,j,k); Qr1%"^4
k = j; 52/^>=t
} z<ptrH
} .<^dv?@
[G+M94[A
} lLxKC7b
}7+G'=XI/
} 0XSZ3dY&+
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SortUtil： -OZXl
&Ph@uZ\
package org.rut.util.algorithm; fBS;~;l
#JYv1F
import org.rut.util.algorithm.support.BubbleSort; Ti#2D3
import org.rut.util.algorithm.support.HeapSort; X_Is#&6;
import org.rut.util.algorithm.support.ImprovedMergeSort; `Q<hL{AH
import org.rut.util.algorithm.support.ImprovedQuickSort; @sav8]
import org.rut.util.algorithm.support.InsertSort; hZVF72D26
import org.rut.util.algorithm.support.MergeSort; aN}yS=(Ff
import org.rut.util.algorithm.support.QuickSort; .d^8w97
import org.rut.util.algorithm.support.SelectionSort; |0ACapp!
import org.rut.util.algorithm.support.ShellSort; J1YP-:
hvQOwA;e
/** iyc}a6g
* @author treeroot Z<;<!+,
* @since 2006-2-2 lV]hjt-L 2
* @version 1.0 D0v!fF~
*/ :-xp'_\L
public class SortUtil { L:IaJ?+?
public final static int INSERT = 1; m!er"0
public final static int BUBBLE = 2; vK!,vKa.
public final static int SELECTION = 3; R4 ;^R
public final static int SHELL = 4; }N#jA yp!
public final static int QUICK = 5; 25XD fi75
public final static int IMPROVED_QUICK = 6; ,6~c0]/
public final static int MERGE = 7; QK&<im-
public final static int IMPROVED_MERGE = 8; ;}#tm9S;
public final static int HEAP = 9; D@rOX(m
3cBuqQ
public static void sort(int[] data) { ,oT?-PC$z
sort(data, IMPROVED_QUICK); |F-_YR
} BLgmFE2
private static String[] name={ CtTG`)"|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'M=(5p
}; @C0{m7q
usZmf=p-r
private static Sort[] impl=new Sort[]{ {oy(08`6
new InsertSort(), 8b8ui
new BubbleSort(), bqJL@!T
new SelectionSort(), $u|p(E:*
new ShellSort(), ,+3l9FuQ
new QuickSort(), F[ N{7C3
new ImprovedQuickSort(), J Xo_l
new MergeSort(), O(!J^J3_z
new ImprovedMergeSort(), Q!7Er
new HeapSort() ,}2M'DSWa
}; Wo&MHMP
;eI,1 [_
public static String toString(int algorithm){ bLUn>ch
return name[algorithm-1]; y&-wb'==p
} k|F<?:C
H[U$4 %t
public static void sort(int[] data, int algorithm) { .n[!3X|d
impl[algorithm-1].sort(data); \9geDX9A
} NC)Iu
:/c=."z.
public static interface Sort { v*7}ux8
public void sort(int[] data); Tm-Nz7U^^
} ]hpocr
sn '#]yM
public static void swap(int[] data, int i, int j) { GM%%7^uE
int temp = data; u3(zixb
data = data[j]; (s4w0z
data[j] = temp; 4`)`%R$
} *>h"}e41
} $`(}ygmP