[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; T"H"m4{'
} |AExaO"jk
int i1=l; <6.`(isph
int i2=mid+1; e:MbMj6`
for(int cur=l;cur<=r;cur++){ um/F:rp
if(i1==mid+1) Y<Ae_yLa
data[cur]=temp[i2++]; s."N7F
else if(i2>r) *=O3kUoL
data[cur]=temp[i1++]; 2H8\P+
else if(temp[i1] data[cur]=temp[i1++]; TT;ls<(Lg
else Zr6.Nw
data[cur]=temp[i2++]; N8x&<H
} y~OP9Tg
} ^pY8'LF6
>U\P^yU
} x3 ( _fS
Dh}d-m_5
改进后的归并排序: ql5&&e=-
^u90N>Dvq
package org.rut.util.algorithm.support; FD%OG6db];
7NOF^/nU
import org.rut.util.algorithm.SortUtil; fY=:geB
b$ 8R
/** #Ddo` >`&
* @author treeroot I%Z=O=
* @since 2006-2-2 3TV4|&W;
* @version 1.0 PD^ 6Ywn>s
*/ l*CCnqE
public class ImprovedMergeSort implements SortUtil.Sort { %)d7iT~M
;2?fz@KZ
private static final int THRESHOLD = 10; ^HuB40
(*vBpJyz%
/* Zf??/+[
* (non-Javadoc) e=#D1
* G|t0no\f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'vq0Tw5
*/ rkdA4'66w
public void sort(int[] data) { ^)`e}}
int[] temp=new int[data.length]; `|92!Ej
mergeSort(data,temp,0,data.length-1); IY!8j$'|
} fX\y/C
b o_`P3
private void mergeSort(int[] data, int[] temp, int l, int r) { ?djH!
int i, j, k; psiuoYf
int mid = (l + r) / 2; sUiO~<Ozpk
if (l == r) CZy3]O"qW
return; <wd;W;B
if ((mid - l) >= THRESHOLD) 96; gzG@1!
mergeSort(data, temp, l, mid); Y}C|4"V
else y GmFi
insertSort(data, l, mid - l + 1); 8aM\B%NGWi
if ((r - mid) > THRESHOLD) NCo!n$O1~
mergeSort(data, temp, mid + 1, r); T>hm\!
else 3-Xd9ou
insertSort(data, mid + 1, r - mid); S|6i]/
q^ &r<i
for (i = l; i <= mid; i++) { U ){4W0
temp = data; ![I|hB
} m9DTz$S.
for (j = 1; j <= r - mid; j++) { i;Kax4k
temp[r - j + 1] = data[j + mid]; BbL]0i
} /m^G 99N
int a = temp[l]; E1w8d4P,G
int b = temp[r]; *L Y6hph"
for (i = l, j = r, k = l; k <= r; k++) { 7@k3-?q
if (a < b) { B:cQsaty
data[k] = temp[i++]; ;v.J D7
a = temp; CeUXGa|C
} else { P{J9#.Zq&s
data[k] = temp[j--]; sK/ymEfRv
b = temp[j]; 3Tw9Uc\vT
} ) jM-5}"
} ZTB6m`
} |(,{&\
6p3cMJ'8y
/** +^AAik<yl
* @param data #i*PwgC%_
* @param l *mYGs )|
* @param i zF? 6"
*/ ~6QV?j
private void insertSort(int[] data, int start, int len) { d@b2XCh<K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Tfv@oPu
} n!Y}D:6c6
} q@wX=
} Imclz4'8
} *1:kIi7_
;WrG\R/|
堆排序： +Oo-8f*
e(&u3 #7Nn
package org.rut.util.algorithm.support; vkG%w;
fwUF5Y
import org.rut.util.algorithm.SortUtil; )!G 10
t!B,%,Dp
/** PTXS8e4
* @author treeroot VuK>lY&
* @since 2006-2-2 o,0 Z^"|
* @version 1.0 adgd7JjI*
*/ ,u-9e4
public class HeapSort implements SortUtil.Sort{ 9Gx`[{wI9<
*7L1SjZw
/* (non-Javadoc) ,&* BhUC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2<'ol65/c
*/ P^lzbWj^
public void sort(int[] data) { \SYeDy
MaxHeap h=new MaxHeap(); 0Xn,q]@Z
h.init(data); $d.Dk4.ed
for(int i=0;i h.remove(); -0NkAQrg
System.arraycopy(h.queue,1,data,0,data.length); KO"+"1 .
} i;IhsKO0R
9gIim
private static class MaxHeap{ /pLf?m9
23Q 88z
void init(int[] data){ rx<P#y]3)
this.queue=new int[data.length+1]; I'2I'x\M
for(int i=0;i queue[++size]=data; N+pCC
fixUp(size); yi(IIW
} wqzpFPk(
} @s,kx.S
A.$P1zwC
private int size=0; P1$D[aF9$
5rQu^6&
private int[] queue; L EFLKC
>S{8sN
public int get() { $uRi/%Q9
return queue[1]; =&FaMR2
} {/48n83n
[O]rf+NZ(5
public void remove() { {* w _*
SortUtil.swap(queue,1,size--); z;N`jqo
fixDown(1); d%E*P4Ua
} "\5 T 6
file://fixdown 7(|f@Y~*
private void fixDown(int k) { E!L_"GW
int j; }-9 c1&m
while ((j = k << 1) <= size) { >8$Lqj^i
if (j < size %26amp;%26amp; queue[j] j++; |PGTP#O<
if (queue[k]>queue[j]) file://不用交换 3`NSSS
break; n+2>jY
SortUtil.swap(queue,j,k); 4 DV,f2:R4
k = j; QDKY7"H
} e:T9f('
} -%V~1
private void fixUp(int k) { T?tZ?!6
while (k > 1) { _|;{{8*?
int j = k >> 1; nD!t*P
if (queue[j]>queue[k]) Pw6%,?lQ
break; 4VC8#x1
SortUtil.swap(queue,j,k); }I18|=TB
k = j; \#F>R,
} >Dz8+y
} +NeoGnj
J90 )v7
} tOo\s&j
\+x#aN\
} w")m]LV
ob|^lAU
SortUtil： ;w._/
OgHqF,0MN
package org.rut.util.algorithm; 8~|v:qk
OAgZeK$
import org.rut.util.algorithm.support.BubbleSort; -av=5hm
import org.rut.util.algorithm.support.HeapSort; q &S@\b
import org.rut.util.algorithm.support.ImprovedMergeSort; OXB 5W#$
import org.rut.util.algorithm.support.ImprovedQuickSort; E[BM0.#bZ
import org.rut.util.algorithm.support.InsertSort; |A+,M"F?
import org.rut.util.algorithm.support.MergeSort; Deq@T {
import org.rut.util.algorithm.support.QuickSort; o5m]Gqa
import org.rut.util.algorithm.support.SelectionSort; K%u>'W
import org.rut.util.algorithm.support.ShellSort; 8m[o*E.4F
TpdYU*z_Br
/** u}rJqZ
* @author treeroot %Z-xh<&
* @since 2006-2-2 SEE:v+3|
* @version 1.0 +k/=L9#e
*/ [e{D
public class SortUtil { V=YDqof
public final static int INSERT = 1; Fr2F&NN`D
public final static int BUBBLE = 2; V0%a/Hi v
public final static int SELECTION = 3; - Nt8'-
public final static int SHELL = 4; +G,_|C2J
public final static int QUICK = 5; xZ SDA8kS
public final static int IMPROVED_QUICK = 6; bXqTc2>=
public final static int MERGE = 7; ['3E'q,4&
public final static int IMPROVED_MERGE = 8; `\/\C[Gg
public final static int HEAP = 9; ,8cVv->u/
`P$X`;SwE
public static void sort(int[] data) { NSq29#
sort(data, IMPROVED_QUICK); JgV4-B0
} H.o3d/8:
private static String[] name={ IIF <Zkpb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ID<[=es6
}; E!>MJlA:k6
Jid_&\
private static Sort[] impl=new Sort[]{ %_~1(Glz
new InsertSort(), _SH~.Mt_!
new BubbleSort(), h8;H<Y;yQ
new SelectionSort(), .B'ws/%5\
new ShellSort(), BJ5^-|
new QuickSort(), d@tNlFfS
new ImprovedQuickSort(), u(PUbxJ V
new MergeSort(), =)x+f/c]
new ImprovedMergeSort(), :'[ha$
new HeapSort() ?u0qYep:
}; ]O0u.=1k
=c%gV]>G
public static String toString(int algorithm){ def\=WyK
return name[algorithm-1]; m\_v{1g
} ?=HoU3
Owv}lJ
public static void sort(int[] data, int algorithm) { E 0@u|
impl[algorithm-1].sort(data); Sw>,Q-32
} *Xn6yL9
A+z}z@K
public static interface Sort { e+?;Dc-SJ\
public void sort(int[] data); Zq:c2/\c}
} _,f7D/dq
UMHFq-
public static void swap(int[] data, int i, int j) { 8?w#=@s
int temp = data; \{qtdTd
data = data[j]; ']Z%6_WF
data[j] = temp; }}oIZP\qM
} 162Dj$
} D}N4*L1