[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; c9@3=6S/
} #u"@q< )
int i1=l; fhdqes])
int i2=mid+1; >'m&/&h
for(int cur=l;cur<=r;cur++){ K}n.k[Do
if(i1==mid+1) U7fNA7#x"
data[cur]=temp[i2++]; li{<F{7
else if(i2>r) dA2@PKK
data[cur]=temp[i1++]; Gys-Im6>~@
else if(temp[i1] data[cur]=temp[i1++]; xz}CqPJ#
else ;X+.Ag
data[cur]=temp[i2++]; V\n!?1{kdF
} RV]QVA*i
} |"b|Q
247vU1
} `6YN/"unfp
]m&Ss
改进后的归并排序: ?|`n&HrP
PxWH)4
package org.rut.util.algorithm.support; gDw(_KC
&_@M 6[-
import org.rut.util.algorithm.SortUtil; 7^@ 1cA=S
2=<,#7zlJ
/** } nIYNeP?D
* @author treeroot L*p7|rq$"
* @since 2006-2-2 I"8Z'<|/\q
* @version 1.0 ~rq:I<5
*/ Xmb##:
public class ImprovedMergeSort implements SortUtil.Sort { Jp8,s%
I@Yk &aU
private static final int THRESHOLD = 10; _TJkYz$
Z,-TMtM7
/* :vS/Lzk
* (non-Javadoc) SN7_^F
* c/F!cW{z^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q?>*h xzoP
*/ |Ul4n@+2
public void sort(int[] data) { ::GW
int[] temp=new int[data.length]; KB~`3Wj|Z
mergeSort(data,temp,0,data.length-1); *ni0.
} " :[;}f;
MCXt,`}[
private void mergeSort(int[] data, int[] temp, int l, int r) { %Zfh6Bl\X
int i, j, k; U3M;{_g
int mid = (l + r) / 2; 5ff5M=M
if (l == r) 1} _<qk9
return; 1?"Zrd
if ((mid - l) >= THRESHOLD) \O~WMN
mergeSort(data, temp, l, mid); ?}uvpB1}
else \|4F?Y
insertSort(data, l, mid - l + 1); ignOF
if ((r - mid) > THRESHOLD) ^4[QX -_2
mergeSort(data, temp, mid + 1, r); ~dgFr6
else 5YUe>P D
insertSort(data, mid + 1, r - mid); +,i_G?eX
MP )nQ
for (i = l; i <= mid; i++) { r'|ei,
temp = data; ,>kXn1 ,
} V6Of(;r
for (j = 1; j <= r - mid; j++) { b ts*qx&)
temp[r - j + 1] = data[j + mid]; PKGqu,J,
} uc=u4@.>
int a = temp[l]; pJo4&Ff
int b = temp[r]; '7@Dw;
for (i = l, j = r, k = l; k <= r; k++) { xkkG#n)
if (a < b) { hPKutx
data[k] = temp[i++]; 0G'v4Vj0'
a = temp; sAK&^g
} else { dJb7d`
data[k] = temp[j--]; l{kacfk#
b = temp[j]; i4SWFa``
} M%!j\}2A
} mkgL/h*
} K|;L{[[yH
<BdC#t:*L
/** '&]6(+I>
* @param data d%!yFix;<
* @param l L<Z2
* @param i x;4m@)Mu
*/ g ZES}]N
private void insertSort(int[] data, int start, int len) { xKT;1(Mk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ILHn~d IC
} g,RhUt9
} ;>]dwsA*P
} Z]OX6G
} 0h('@Hb.K#
4i29nq^n
堆排序： u b@'(*
%7Gq#rq
package org.rut.util.algorithm.support; UyMlk
'?$<k@mJW
import org.rut.util.algorithm.SortUtil; I wu^@
wA87|YK8*
/** K=P LOC5
* @author treeroot Ml_!)b
* @since 2006-2-2 "x3!F&
* @version 1.0 ?J"Y4,{
*/ `K2vG`c
public class HeapSort implements SortUtil.Sort{ 1-G-p:|
uBaGOW|Pl
/* (non-Javadoc) grDz7\i:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z-nV!#
*/ /DSy/p0%
public void sort(int[] data) { RS7J~Q
MaxHeap h=new MaxHeap(); ~}G#ys\1
h.init(data); 6x@]b>W
for(int i=0;i h.remove(); w#sP5qKv8
System.arraycopy(h.queue,1,data,0,data.length); z2dW)_fU$
} !:D,|k\m
1n$
private static class MaxHeap{ 9H%ixBnM
=mxj2>,&
void init(int[] data){ "W"r0"4
this.queue=new int[data.length+1]; "N=q>jaX
for(int i=0;i queue[++size]=data; tqU8>d0^
fixUp(size); d^|r#"o[
} L%.=SbmS
} XfwH1n/o#
A+hT2Ew@t}
private int size=0; &([Gc+"5E.
wY7+E/
private int[] queue; R1:7]z0B
DEenvS`,P
public int get() { >LFj@YW_)
return queue[1]; Nw3IDy~T
} i32S(3se
rT{2
public void remove() { CyJZip
SortUtil.swap(queue,1,size--); T"Nnl(cO_
fixDown(1); xQzXl
} .zdmUS:
file://fixdown &([yI>%
private void fixDown(int k) { \@j3/!=,n%
int j; &$pA,Gjin\
while ((j = k << 1) <= size) { i]zTY\gw8M
if (j < size %26amp;%26amp; queue[j] j++; ~rbJtz
if (queue[k]>queue[j]) file://不用交换 p;vrPS
break; liH1r1M
SortUtil.swap(queue,j,k); ^aL> /'Y#|
k = j; 95-%>?4
} /.m}y$@GV
} `Jl_'P}
private void fixUp(int k) { MPJ0>Ly
while (k > 1) { mp0!S
int j = k >> 1; 5R#:ALwX:
if (queue[j]>queue[k]) Now2ad&
break; I]N!cEr;@-
SortUtil.swap(queue,j,k); '\LU 8VC
k = j; UeSPwY
} 2ZQ|nwb7
} { *Wc`ZBY
S!~p/bB[+I
} + oNrc.
hhr>nuA
} vP/sG5$x
1);E!D[
SortUtil： G)7J$4R
hmtDw,j
package org.rut.util.algorithm; !9=Y(rb
6E:5w9_=c
import org.rut.util.algorithm.support.BubbleSort; r Ww.(l
import org.rut.util.algorithm.support.HeapSort; RS Vt
import org.rut.util.algorithm.support.ImprovedMergeSort; sQa9M
import org.rut.util.algorithm.support.ImprovedQuickSort; 5ZHO+@HiFH
import org.rut.util.algorithm.support.InsertSort; wRE2rsXoU
import org.rut.util.algorithm.support.MergeSort; ;UWp0d%
import org.rut.util.algorithm.support.QuickSort; x/#.%Ga#T
import org.rut.util.algorithm.support.SelectionSort; !Ka~X!+\
import org.rut.util.algorithm.support.ShellSort; #0/^v*
\'Ca%j
/** &d[%
* @author treeroot 3+:uV
* @since 2006-2-2 [[8h*[:
* @version 1.0 wEbO|S+K1
*/ v|YJ2q?19
public class SortUtil { v!rOT/I
public final static int INSERT = 1; H?dEgubg7]
public final static int BUBBLE = 2; o(Ro/U(Wu
public final static int SELECTION = 3; Sy34doAZ
public final static int SHELL = 4; ]hA]o7k
public final static int QUICK = 5; LfG$?<}hR
public final static int IMPROVED_QUICK = 6; \!'K#%]9
public final static int MERGE = 7; +Ram%"Zwh
public final static int IMPROVED_MERGE = 8; /Oa.@53tK6
public final static int HEAP = 9; %'[ pucEF
e#{l
public static void sort(int[] data) { U\",!S~<
sort(data, IMPROVED_QUICK); w'!J
} ~1.~4~um
private static String[] name={ ;WsV.n
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fn\&%`U
}; ~Uaz;<"j0
bR|1*<
private static Sort[] impl=new Sort[]{ <fcw:Ae
new InsertSort(), 0'tm.,
new BubbleSort(), n(el
new SelectionSort(), :Nw7!fd
new ShellSort(), \b|Q`)TK
new QuickSort(), |0aGX]Y
new ImprovedQuickSort(), .1?7)k v
new MergeSort(), `v$Bib)
new ImprovedMergeSort(), {c:ef@'U
new HeapSort() h5m6 )0"
}; 3ocRq %%K
+N!!Z2
public static String toString(int algorithm){ 5v-o2
return name[algorithm-1]; 0i9C\'W`
} 7)+%;|~
&5;y&dh
public static void sort(int[] data, int algorithm) { ffE>%M*
impl[algorithm-1].sort(data); JQWW's}
} Rk52K*Dc
>dqeGM7Np>
public static interface Sort { I45\xP4i
public void sort(int[] data); ~6:y@4&F
} p`LPO
cK+y3`.0
public static void swap(int[] data, int i, int j) { r=pb7=M#LN
int temp = data; vE+OL8V
data = data[j]; DM@&=c
data[j] = temp; $ *^E
} 'l3K*lck
} {V9}W<