[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; ~q]@Jp
} _9yb5_
int i1=l; v?Dc3
int i2=mid+1; FYPv:k
for(int cur=l;cur<=r;cur++){ dr3j<D-Q
if(i1==mid+1) x(oL\I_Z
data[cur]=temp[i2++]; to9~l"n.s
else if(i2>r) }j<:hDQP
data[cur]=temp[i1++]; P^9y0Q
else if(temp[i1] data[cur]=temp[i1++]; |@'/F#T
else I/YBL
data[cur]=temp[i2++]; 8@;|x2=y
} k1Z"Qmz
} f_A'.oq+
}AfX0[!O
} j9Qd 45
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改进后的归并排序: 7#/->Y
a#3+PB#
package org.rut.util.algorithm.support; Ws;S=|9,7~
(gW#T\Eln
import org.rut.util.algorithm.SortUtil; wW2b?b{*Z
"&h{+DHS
/** co!o+jP
* @author treeroot 9!'qLO
* @since 2006-2-2 f</'=k
* @version 1.0 ]q!,onJ
*/ +xoh=m
public class ImprovedMergeSort implements SortUtil.Sort { 6/{V#.(
FuqMT`
private static final int THRESHOLD = 10; {qxFRi#\k
WX.6|
/* QuFzj`(
* (non-Javadoc) akR+QZ,)
* ])`+ 78
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x=-dv8N?
*/ 0,a/t jSr
public void sort(int[] data) { =VA5!-6<Uq
int[] temp=new int[data.length]; rl:6N*kK
mergeSort(data,temp,0,data.length-1); $D;/b+a
} n^}M*#
117`=9F
private void mergeSort(int[] data, int[] temp, int l, int r) { *xHj*
int i, j, k; =AaTn::e/
int mid = (l + r) / 2; }ACWSkWK
if (l == r) (!'=?B "
return; KWuc*!
if ((mid - l) >= THRESHOLD) Eo h4#fZ\N
mergeSort(data, temp, l, mid); ,_SE!iL
else #B_Em$
insertSort(data, l, mid - l + 1); 2=R}u-@6p
if ((r - mid) > THRESHOLD) W=QT-4
mergeSort(data, temp, mid + 1, r); S ^5EG;[
else Ug}dw a
insertSort(data, mid + 1, r - mid); Sr$&]R]^
-@*[
for (i = l; i <= mid; i++) { >.sdLA Si
temp = data; :vsBobiJ
} F7o#KN*.]
for (j = 1; j <= r - mid; j++) { Tt^PiaS!
temp[r - j + 1] = data[j + mid]; IZ9L ;"}
} CdBsd
int a = temp[l]; p~v rr 5
int b = temp[r]; o<1a]M|
for (i = l, j = r, k = l; k <= r; k++) { 7E0L-E=.
if (a < b) { 8]G
data[k] = temp[i++]; _ ^ JhncL
a = temp; !V%h0OE\
} else { whH_<@!
data[k] = temp[j--]; JXT%@w>I
b = temp[j]; Z}X oWT2f
} pt/UY<@yoN
} /Kw}R5l
} Kp]\r-5UD>
%R|_o<(#MJ
/** L>trLD1pt
* @param data l g0 'qH8
* @param l F,hiKq*
* @param i v8{ jEAK
*/ , ZisJksk
private void insertSort(int[] data, int start, int len) { #\P\(+0K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]TE(:]o7V
} J&hzr t
} a9f!f %9
} AiF'*!1
} ,Wbr; zb
9`a1xnL
堆排序： Q4H(JD1f)
h4iz(*
package org.rut.util.algorithm.support; Y5dt/8Jo
\OzPDN
import org.rut.util.algorithm.SortUtil; ,0pCc<
}q$6^y
/** OuZPgN
* @author treeroot {fd/:B 7T
* @since 2006-2-2 rT#2'-f
* @version 1.0 )2pOCAjL2
*/ l_q=@y
public class HeapSort implements SortUtil.Sort{ &EUI
d O})#50f
/* (non-Javadoc) 1QA{NAnu&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R>C^duos.
*/ <2.87:
public void sort(int[] data) { DqH?:`G
MaxHeap h=new MaxHeap(); d*B^pDf
h.init(data); *UerLpf
for(int i=0;i h.remove(); W{El^')F
System.arraycopy(h.queue,1,data,0,data.length); ^Rpy5/d
} 4uX|2nJ2!;
8\lRP,-
private static class MaxHeap{ mJ #|~I*Z-
/#FU"
void init(int[] data){ NMy+=GZu^
this.queue=new int[data.length+1]; -%G}T}"_
for(int i=0;i queue[++size]=data; t| cL!
fixUp(size); If*+yr|
} @$*LU:[
} w;OvZo|
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private int size=0; |T;]%<O3E
Au\j6mB
private int[] queue; =xs"<Q*w>
RE<s$B$[
public int get() { @CB&*VoB
return queue[1]; r3}Q1b&
} 2{Johqf
*x<3=9V
public void remove() { W'xJh0o
SortUtil.swap(queue,1,size--); #Fwf]{J
fixDown(1); *.,G;EC^
} pYBY"r
file://fixdown <E&8g[x6
private void fixDown(int k) { $sxm MP
int j; [Yyb)Qf
while ((j = k << 1) <= size) { vVyX[ZZ
if (j < size %26amp;%26amp; queue[j] j++; p"dK,A5#)
if (queue[k]>queue[j]) file://不用交换 x|=]Xxco
break; J1\H^gyW)
SortUtil.swap(queue,j,k); uD0<|At/
k = j; i]{-KZC
} >qL-a*w:a
} 2R`dyg
private void fixUp(int k) { ?= RC?K
while (k > 1) { 2mt S\bAF
int j = k >> 1; {/2 _"H3:
if (queue[j]>queue[k]) |=rb#z&
break; 3;'RF#VL
SortUtil.swap(queue,j,k); DGJt$o=&@
k = j; |Bhj L,
} <tn6=IV
} i.5?b/l0
}~O`(mnD}K
} \2^_v' >K
;%<R>gDWv
} R^f-j-$o]
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SortUtil： 8h '~*
z#u<]] 5
package org.rut.util.algorithm; N]|P||fC
AM:lU
import org.rut.util.algorithm.support.BubbleSort; *=)kR7,]9d
import org.rut.util.algorithm.support.HeapSort; >g+e`!;6
import org.rut.util.algorithm.support.ImprovedMergeSort; 2)F~
import org.rut.util.algorithm.support.ImprovedQuickSort; w7e+~8|
import org.rut.util.algorithm.support.InsertSort; *%aWGAu:
import org.rut.util.algorithm.support.MergeSort; Z[GeU>?P
import org.rut.util.algorithm.support.QuickSort; 8`Iz%rw&(J
import org.rut.util.algorithm.support.SelectionSort; &<Iz?AVr
import org.rut.util.algorithm.support.ShellSort; *Z}9S9YtN
gNaB^IY
/** 8r\;8all
* @author treeroot Y7GHIzX
* @since 2006-2-2 @\?QZX(H
* @version 1.0 "~,3gNTzV
*/ %SC%#_7
public class SortUtil { 1$RUhxT
public final static int INSERT = 1; ;8iK];^
public final static int BUBBLE = 2; !)//b]
public final static int SELECTION = 3; g&?RQ
public final static int SHELL = 4; "V>p
public final static int QUICK = 5; J5#shs[M:
public final static int IMPROVED_QUICK = 6; 7f_tH_(
public final static int MERGE = 7; mIYM+2p
public final static int IMPROVED_MERGE = 8; (&@,ZI;
public final static int HEAP = 9; =;m;r!,K
di|5|bn7
public static void sort(int[] data) { Z~6PrM-M
sort(data, IMPROVED_QUICK); O!ngQrI
} S7kZpD$
private static String[] name={ ;0JK>c ]#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" d3&l!DoX
}; kNC]q,ljt5
aQ#6PO7.Z
private static Sort[] impl=new Sort[]{ {Q/_I@m].
new InsertSort(), EF5:$#
new BubbleSort(), X775j"<d
new SelectionSort(), i"GCm`
new ShellSort(), 9*CJWS;
new QuickSort(), 9 lH00n+'
new ImprovedQuickSort(), TYu(;~
new MergeSort(), Q$:>yveR*
new ImprovedMergeSort(), U%4s@{7
new HeapSort() ATkx_1]KM-
}; )9~-^V0A^>
%"=qdBuk
public static String toString(int algorithm){ ?>T (
return name[algorithm-1]; f~Ve7
} ?3;0 SAh
x~n]r[!L
public static void sort(int[] data, int algorithm) { w<$0n#5
impl[algorithm-1].sort(data); v?<Tkw ^F
} "3e1 7dsY
2&KM&NX~
public static interface Sort { 2E_d$nsJ
public void sort(int[] data); ~`!{5:v
} 9`|~-b
o?((FW5.;
public static void swap(int[] data, int i, int j) { <:!;79T\
int temp = data; ODyKS;
data = data[j]; t<H@c9{;*
data[j] = temp; b6ui&Y8z
} ,4Qct=%L_
} .:A&5Y-