[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; ]7ZY|fP2
} iHB1/
int i1=l; aA5rvP+
int i2=mid+1; 09psqXU@I
for(int cur=l;cur<=r;cur++){ >x$.mXX{
if(i1==mid+1) f*}H4H EO
data[cur]=temp[i2++]; 7sci&!.2`
else if(i2>r) ,`ZIW
data[cur]=temp[i1++]; +bbhm0f
else if(temp[i1] data[cur]=temp[i1++]; a;2Lgv0/
else *Bgk3(n)
data[cur]=temp[i2++]; .^%!X!r
} _Bh ^<D-
} aMaFxEW
*75?%l
} (t\ F>A
n 7Bua
改进后的归并排序: ]"Qm25`Qz
1|c\^;cTkt
package org.rut.util.algorithm.support; 6fOh *
#6%9*Rh
import org.rut.util.algorithm.SortUtil; ^l(Kj3gM
"7*cF>FE8
/** rfdT0xfcU
* @author treeroot @}{~Ofs
* @since 2006-2-2 vQ/&iAyut
* @version 1.0 E4nj*Lp~+
*/ xxlYn9ke
public class ImprovedMergeSort implements SortUtil.Sort { "$VqOSo
@+3@Z?!SZ
private static final int THRESHOLD = 10; i"{ \ >
6H\apgHm
/* X~ AE??
* (non-Javadoc) '<35XjW
* ; iK9'u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &!lGx7zf
*/ D6KYkN(,v
public void sort(int[] data) { ]ctlK'.
int[] temp=new int[data.length]; *0 0K3
mergeSort(data,temp,0,data.length-1); ?1z." &
} Y0||>LX
0m|$ vb
private void mergeSort(int[] data, int[] temp, int l, int r) { W\tSXM-Hg
int i, j, k; $1h,<$5H
int mid = (l + r) / 2; b@yGa%Gz@
if (l == r) T@ [*V[
return; cG"+n@\
if ((mid - l) >= THRESHOLD) +s}"&IV%
mergeSort(data, temp, l, mid); Q599@5aS
else u5,\Kz
insertSort(data, l, mid - l + 1); ?y\gjC6CNG
if ((r - mid) > THRESHOLD) `~bnshUk
mergeSort(data, temp, mid + 1, r); 2^}E!(<
else =vv4;az X
insertSort(data, mid + 1, r - mid); xt%-<%s%f
4EO,9#0
for (i = l; i <= mid; i++) { U2DE"
temp = data; .5',w"R
} GJLlMi
for (j = 1; j <= r - mid; j++) { _IA@X. )?
temp[r - j + 1] = data[j + mid]; XL/?v" /
} ` R;6]/I?
int a = temp[l]; gsqpQq7
int b = temp[r]; yJ(p-3O5
for (i = l, j = r, k = l; k <= r; k++) { MmjeFv
if (a < b) { RE72%w(oM
data[k] = temp[i++]; 26c,hPIeXY
a = temp; V0,%g+.^
} else { , 8NY<sFh
data[k] = temp[j--]; Q.q'pJ-
b = temp[j]; ccUq!1
} ?3Ytn+Py
} =+T$1
} wz-#kH5?
HbRDa
/** p/4\O
* @param data '\$2+*
* @param l 4v"9I(
* @param i <Ct b^4$
*/ poqcoSL"}
private void insertSort(int[] data, int start, int len) { r.5}Q?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _`/:gkZS
} 'nOc_b0
} ltKUpRE\?
} gg>O:np8
} DA5kox&cU
~mqiXr8
堆排序： `g2DN#q[0
H5f>Q0jq
package org.rut.util.algorithm.support; Fxu'(xa
&*wN@e(c
import org.rut.util.algorithm.SortUtil; VpDNp (2
0]C~CvO
/** O<&8gk~
* @author treeroot ZgN)sVJ
* @since 2006-2-2 fZqMznF
* @version 1.0 nQ*9|v4
*/ E,]G Ek
public class HeapSort implements SortUtil.Sort{ 9'tElpDJ6#
o1j_5c PS
/* (non-Javadoc) CzF#feTA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Tl.dr
*/ _H:mBk,,
public void sort(int[] data) { zj ;'0Zu
MaxHeap h=new MaxHeap(); Y<'T;@
h.init(data); 6!|-,t><
for(int i=0;i h.remove(); 2]Nc@wX`p
System.arraycopy(h.queue,1,data,0,data.length); CS;bm`8a
} NuLyu=.?
&{):x
private static class MaxHeap{ j4v.8;
""GeO%J8
void init(int[] data){ 9o|=n'o
this.queue=new int[data.length+1]; 9sQ4 $
for(int i=0;i queue[++size]=data; kKU,|>3h
fixUp(size); \/3Xb
} VP|ga}(
} EkV LSur
#K8kz
private int size=0; g1JBssw&m
>4gGb)
private int[] queue; Y)kO"
:G/T{87H
public int get() { ,&Iw5E[
return queue[1]; l.ri]e
} |[ymNG
*_ 2db
public void remove() { -6(u09mb_
SortUtil.swap(queue,1,size--); )z'LXy8
fixDown(1); |K(j}^1k
} sb"etc`w%-
file://fixdown y^vB_[6l
private void fixDown(int k) { t(-`==.R
int j; J. ;9-
while ((j = k << 1) <= size) { :wn9bCom?M
if (j < size %26amp;%26amp; queue[j] j++; f%Y'7~9bA
if (queue[k]>queue[j]) file://不用交换 a?4'',~
break; Nwu,:}T
SortUtil.swap(queue,j,k); }g1V6`8&
k = j; %#!`>S)O
} Mqu>#lL
} q*,g
private void fixUp(int k) { (Ev/R%Z
while (k > 1) { wAC*D=Qj
int j = k >> 1; bLrC_
if (queue[j]>queue[k]) 2f'3Vjp~G
break; | |=q"h3(
SortUtil.swap(queue,j,k); #7!P3j
k = j; ?lg
} w)A@
} r+T@WvS%W
|5o0N8!b[
} ZT>?[`Vgc
&F4khga`^:
} V) #vvnq
bL: !3|M
SortUtil： =Ri'Prx&
,G,'#]
package org.rut.util.algorithm; "pdq_35
W,<P])
import org.rut.util.algorithm.support.BubbleSort; Q;]g9T[)
import org.rut.util.algorithm.support.HeapSort; S2/6VoGE
import org.rut.util.algorithm.support.ImprovedMergeSort; \ /(;LHWQ
import org.rut.util.algorithm.support.ImprovedQuickSort; DYS|"tSk
import org.rut.util.algorithm.support.InsertSort; A=LyN$%
import org.rut.util.algorithm.support.MergeSort; =+K2`=y;WF
import org.rut.util.algorithm.support.QuickSort; zmV5k
import org.rut.util.algorithm.support.SelectionSort; VqzcTr]_
import org.rut.util.algorithm.support.ShellSort; AS;EO[Vn
1&S34wJF
/** 95Q{d'&
* @author treeroot dac?b(
* @since 2006-2-2 [D[&aA
* @version 1.0 Z^AOV:|m
*/ 5^"T`,${
public class SortUtil { }!tJ3G
public final static int INSERT = 1; CRK%%;=>
public final static int BUBBLE = 2; A#:5b5R
public final static int SELECTION = 3; %y(oY
public final static int SHELL = 4; 739J] M
public final static int QUICK = 5; f9A^0A?c
public final static int IMPROVED_QUICK = 6; qd@x#"qT
public final static int MERGE = 7; %1E:rw@
public final static int IMPROVED_MERGE = 8; . zM
public final static int HEAP = 9; bVEt?E*+
Ood8Qty(
public static void sort(int[] data) { K)m\xzT/
sort(data, IMPROVED_QUICK); ?W l=F/
} >"^H"K/T
private static String[] name={ ?.&]4z([
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >Ux5UD
}; m'|{AjH z6
w Phs1rL
private static Sort[] impl=new Sort[]{ ?nWK s
new InsertSort(), xHs8']*\
new BubbleSort(), eGZ{%\PH<
new SelectionSort(), a@[y)xa$Z
new ShellSort(), EAVB:gE
new QuickSort(), Tvd=EO
new ImprovedQuickSort(), oz!;sj{,D
new MergeSort(), R)s@2S
new ImprovedMergeSort(), {1H3VSYq
new HeapSort() QfI=
}; 5ZG-3qj
JGS4r+
public static String toString(int algorithm){ mlolSD;7
return name[algorithm-1]; lM1Y }
} ^4Ta0kDn
D8u_Z<6IjI
public static void sort(int[] data, int algorithm) { V~rF`1+5N
impl[algorithm-1].sort(data); giU6f!%
} _x<CTFTL
l56D?E8
public static interface Sort { [12^NEt
public void sort(int[] data); ~~h@(2/Q>x
} }"?v=9.G
F-MN%WD~
public static void swap(int[] data, int i, int j) { q$[x*!~
int temp = data; Rk#@{_
data = data[j]; F1skI _!
data[j] = temp; &5Ai&<q"p
} K1S)S8.EZ8
} Z4U8~i