[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; %4cUa| =?
} 5oplV(<?*S
int i1=l; y-}lz#N
int i2=mid+1; 2GcQh]ohc
for(int cur=l;cur<=r;cur++){ ]Ole#Lz}Q
if(i1==mid+1) /`0*!sN*5
data[cur]=temp[i2++]; a=k+:=%y
else if(i2>r) XZuJ<]}X,
data[cur]=temp[i1++]; bK; -Xcm
else if(temp[i1] data[cur]=temp[i1++]; &Z5$ 5,[
else 0G9@A8LU
data[cur]=temp[i2++]; Giz9jzF\
} *#Hi W)
} ]c+qD,wqt>
<"/Y`/
} Eszwg
8[,,Kr)-
改进后的归并排序: A$A7F=x
oo3ZYA
package org.rut.util.algorithm.support; x2/|i?ZO
LLg ']9
import org.rut.util.algorithm.SortUtil; ;=hl!CB
b]~X U
/** 7*OO k"9
* @author treeroot 5?k_Q"~
* @since 2006-2-2 =ALy.^J=
* @version 1.0 JrseU6N
*/ |]DZc/
public class ImprovedMergeSort implements SortUtil.Sort { E3.=|]W'
JJ,Fh .
private static final int THRESHOLD = 10; eGvHU ;@
9#/z[!
/* <!K2xb-d^
* (non-Javadoc) b`E0tZcJ
* gPe*M =iF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SS O$.rp
*/ k\Oy\z@
public void sort(int[] data) { 5wRDH1z@{
int[] temp=new int[data.length]; >9F,=63A
mergeSort(data,temp,0,data.length-1); Q <^'v>~n
} b.h~QyI/W
H0 km*5Sn
private void mergeSort(int[] data, int[] temp, int l, int r) { gnNMuqt
int i, j, k; V8NNIS
int mid = (l + r) / 2; ;f[Ki$7
if (l == r) 6*kY7
return; Mc~(S$FU$
if ((mid - l) >= THRESHOLD) nq8mzI
mergeSort(data, temp, l, mid); sL~TV([6/
else FM0)/6I'x
insertSort(data, l, mid - l + 1); R8Lp8!F'
if ((r - mid) > THRESHOLD) ~({aj|Y
mergeSort(data, temp, mid + 1, r); k x6%5%
else R7e`Wn
insertSort(data, mid + 1, r - mid); w@X<</`
]XJpy-U
for (i = l; i <= mid; i++) { jr*A1y*
temp = data; '%V ;oJ"
} g{8>2OK$c
for (j = 1; j <= r - mid; j++) { <N=p_m 2T
temp[r - j + 1] = data[j + mid]; '7 6}6G%
} {08UBnR
int a = temp[l]; x<P$$G/
int b = temp[r]; s8{3~Hv
for (i = l, j = r, k = l; k <= r; k++) { +G?4Wc1
if (a < b) { h;^h[q1'
data[k] = temp[i++]; 7w|W\J^7r
a = temp; Bb]pUb
} else { ):+n!P
data[k] = temp[j--]; d vkA-9
b = temp[j]; QT9(s\u
} WHvN6
} ]$4k+)6
} %K;,qS'N_
"xa<Q%hk
/** j?+FS`a!
* @param data 4bhm1Q
* @param l *r?g&Vw$m
* @param i 4NQS'*%D
*/ E4HG`_cWb
private void insertSort(int[] data, int start, int len) { '>`?T}a,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +T [0r
} 5X|=qZ
} ^lB1- ;ng
} (".`#909
} /+"BU-aQk
>wdR4!x!?
堆排序： `{N0+n
ZJ 8~f
package org.rut.util.algorithm.support; D+LeZBJ
X"y rA;,o
import org.rut.util.algorithm.SortUtil; ,@khV
pxM^|?Hxc
/** +yVz) X
* @author treeroot (JocnM|U
* @since 2006-2-2 VDx=Tsu-
* @version 1.0 nDkyo>t.
*/ %QVX1\>]
public class HeapSort implements SortUtil.Sort{ -G(z!ed
+su>0'a
/* (non-Javadoc) VZ}^1e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T#|Qexz6 @
*/ 1G=1FGvP
public void sort(int[] data) { ^%)'wDK
MaxHeap h=new MaxHeap(); 6QLWF@
h.init(data); }7IS:"tu
for(int i=0;i h.remove(); j7xoe9;TxI
System.arraycopy(h.queue,1,data,0,data.length); ch 4z{7
} {Lk~O)E
,6}HAC $
private static class MaxHeap{ >+7+ gSD#:
d@b"tb}R
void init(int[] data){ zn_InxR
this.queue=new int[data.length+1]; %njX'7^u
for(int i=0;i queue[++size]=data; $iEM$
fixUp(size); 62PtR`b>
} 69!J'kM[
} eq<xO28z
"k)( ,
private int size=0; a,#f%#J\
I$n 0aR6
private int[] queue; zob^z@2
^a[7qX_B
public int get() { %?<C ?.
return queue[1]; <[Q#}/$"
} (VO) Q
w_ kHy_)
public void remove() { IwZn%>1N
SortUtil.swap(queue,1,size--); e/6WhFN#
fixDown(1); @rRBo:0%
} ]sd|u[:k
file://fixdown =xSFKu*
private void fixDown(int k) { ^Gq4Yr
int j; I .p26
while ((j = k << 1) <= size) { y{uRh>l
if (j < size %26amp;%26amp; queue[j] j++; m[LIM}Gu
if (queue[k]>queue[j]) file://不用交换 Kg VLXI6
break; oA(jtX[(
SortUtil.swap(queue,j,k); ^e"BY(
k = j; IU{~{(p"
} T@U_;v|rf
} E=Ah_zKU
private void fixUp(int k) { ?uc=(J+6
while (k > 1) { hvtg_w6K
int j = k >> 1; pT>[w1Kk^
if (queue[j]>queue[k]) eZ[CqUJ&
break; ^cZF#%k
SortUtil.swap(queue,j,k); 6Hi3h{
k = j; *Y?rls`
} c+f~>AaI
} #|v\UJ:Pf/
L}h?nWm8
} ZK[4n5}
izebQVQO*
} azr|Fz/
%Nwap~=H;
SortUtil： S)iv k x
D?44:'x+-
package org.rut.util.algorithm; SpdQ<]
EFW'D=&h8
import org.rut.util.algorithm.support.BubbleSort; <ap%+(!I
import org.rut.util.algorithm.support.HeapSort; ^o,P>u!9
import org.rut.util.algorithm.support.ImprovedMergeSort; Vk5}d[[l
import org.rut.util.algorithm.support.ImprovedQuickSort; f$Nz).(
import org.rut.util.algorithm.support.InsertSort; Pp7}|/
import org.rut.util.algorithm.support.MergeSort; I5mnV<QA^
import org.rut.util.algorithm.support.QuickSort; >2x[ub%$L
import org.rut.util.algorithm.support.SelectionSort; Gw:8-bxS
import org.rut.util.algorithm.support.ShellSort; WNrgqyM
skh6L!6*<
/** b/:9^&z
* @author treeroot v?,_SVgAi
* @since 2006-2-2 G%Hr c
* @version 1.0 %{!*)V\
*/ ^GQ+,0Yy
public class SortUtil { BD&JbH!(
public final static int INSERT = 1; |>5NH'agV
public final static int BUBBLE = 2; )'?3%$EM
public final static int SELECTION = 3; iOkRB[hi
public final static int SHELL = 4; e%uPZ >'q
public final static int QUICK = 5; 3lcd:=
public final static int IMPROVED_QUICK = 6; Z `sM(?m
public final static int MERGE = 7; \hai
public final static int IMPROVED_MERGE = 8; 8~YhT]R=
public final static int HEAP = 9; x9bfH1
_<yGen-
public static void sort(int[] data) { OBqaf )W
sort(data, IMPROVED_QUICK); a6wPkf7-H
} 1//d68*"
private static String[] name={ F.i*'x0u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wHq*)7#h#
}; >B<jR$`6@
W&#Ps6)8
private static Sort[] impl=new Sort[]{ [#`)Bb&w
new InsertSort(), {U?/u93~
new BubbleSort(), bW\OKI1
new SelectionSort(), [`Seh$
new ShellSort(), kG@~;*;l
new QuickSort(), LG0+A}E=C
new ImprovedQuickSort(), btoye \rl
new MergeSort(), HR]*75}e
new ImprovedMergeSort(), -L%tiz`_
new HeapSort() 141@$mMzE
}; -7,xjn
{Z%4Pg
public static String toString(int algorithm){ LlOUK2tZ
return name[algorithm-1]; b)/,
} aqJ>l}{
C ioM!D
public static void sort(int[] data, int algorithm) { o|u<tuUW
impl[algorithm-1].sort(data); K,(37Id'
} Kq&b1x
W: R2e2
public static interface Sort { '0|0rwx
public void sort(int[] data); xo3bY6<n
} V_+XZ+7Lx}
}GI8p* ]o=
public static void swap(int[] data, int i, int j) { zV {_dO
int temp = data; 'qel3Fs"
data = data[j]; t M?3oO
data[j] = temp; :j feY
} _]zm02|
} z0|%h?N