[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; "6 dC
} -#3B>VY
int i1=l; -DX|[70
int i2=mid+1; Y!i4P#4+q
for(int cur=l;cur<=r;cur++){ tAP~
if(i1==mid+1) QtkyKR
data[cur]=temp[i2++]; 8iK>bp
else if(i2>r) [@#P3g\:>W
data[cur]=temp[i1++]; I6YN&9Y
else if(temp[i1] data[cur]=temp[i1++]; ],>Z'W
else $tj[*
data[cur]=temp[i2++]; R2x(8k"LPU
} NJs )2
} \M="R-&b
ff-9NvW4v
} Rla1,{1
0Vh|UJ'&7
改进后的归并排序: +?*,J=/
h:"<x$F
package org.rut.util.algorithm.support; -}9ZZ#K
%l,p />r
import org.rut.util.algorithm.SortUtil; O9=vz%
8NPt[*
/** p[hA?dXn
* @author treeroot n8A*Y3~R
* @since 2006-2-2 +_06{7@h
* @version 1.0 B2 Tp;)
*/ 1A< O Z>
public class ImprovedMergeSort implements SortUtil.Sort { z]=A3!H/Y
PS`v3|d}}}
private static final int THRESHOLD = 10; (Pin9^`ALc
"%<Oadz ap
/* 6~&4>2b0f
* (non-Javadoc) `WC~cb\
* b0tr)>d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;-n+=@]7
*/ mxq'A
public void sort(int[] data) { 3Q~ng2Wv%
int[] temp=new int[data.length]; n_)d4d zl
mergeSort(data,temp,0,data.length-1); -"\z|OQ
} bf'@sh%W
N02N w(pi
private void mergeSort(int[] data, int[] temp, int l, int r) { fi:Z*-
int i, j, k; Z99%uI3
int mid = (l + r) / 2; hi*\5(uH
if (l == r) ;?yd;GOt)
return; "[BuQ0(g
if ((mid - l) >= THRESHOLD) Kv{i_%j
mergeSort(data, temp, l, mid); w \i#
else 9@Cqg5Kx'
insertSort(data, l, mid - l + 1); -1:yqF.x
if ((r - mid) > THRESHOLD) $vTU|o>|
mergeSort(data, temp, mid + 1, r); Pd%o6~_*
else hR[Qdu6r
insertSort(data, mid + 1, r - mid); :a0qm.EN
hCc_+/j|
for (i = l; i <= mid; i++) { CcLP/
temp = data; x>!#8?-h
} n$axqvG
for (j = 1; j <= r - mid; j++) { y2TJDb1
temp[r - j + 1] = data[j + mid]; PC7U&*x@
} X[(u]h`
int a = temp[l]; gK9@-e
int b = temp[r]; jQj`GnN|
for (i = l, j = r, k = l; k <= r; k++) { ds4ERe /
if (a < b) { iU~oPp[e
data[k] = temp[i++]; Zc{at}{
a = temp; {O]Cj~}
} else { .?<,J
data[k] = temp[j--]; -wW%+wH
b = temp[j]; H--(zxK
} yw{GO([ZQ
} hJkIFyQ{j
} IyL2{5
w6qx
/** rKg5?.
* @param data <Ktx*(D
* @param l Hb#8?{
* @param i Mf<Pms\F
*/ |jU/R
private void insertSort(int[] data, int start, int len) { egYJ.ZzF0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b=wc-nA
} rMH\;\ I|U
} GW]Ygf1t
} K`M8[ %S
} @@# ^G8+l
u1~H1 ]Ii
堆排序： ss-{l+Z5
"/S-+Ufn
package org.rut.util.algorithm.support; 2pQ zT
38tRb"3zP
import org.rut.util.algorithm.SortUtil; dK#:io[Nz
HKP<=<8/O
/** h&{9 &D1t
* @author treeroot ,*+F*:o(m
* @since 2006-2-2 [as\>@o
* @version 1.0 ]KA|};>ow
*/ %S. _3`A
public class HeapSort implements SortUtil.Sort{ <2fZYt vt
f2`[skNj
/* (non-Javadoc) dli?/U@hO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ww{bh-nyq
*/ ,?3r-bM
public void sort(int[] data) { &j<B22t!
MaxHeap h=new MaxHeap(); mcP]k8?C
h.init(data); -S"YEH9
for(int i=0;i h.remove(); \3"4;fM!i
System.arraycopy(h.queue,1,data,0,data.length); }:])1!a
} ;/XWX$G@
"@xI
private static class MaxHeap{ X/}kNW!q
r,cV(
void init(int[] data){ z{wJQZ9"
this.queue=new int[data.length+1]; Nz'fMdaX,
for(int i=0;i queue[++size]=data; pi*cO
fixUp(size); pV9$Vg?-H
} `+CRUdr
} ': 87.8$
o+*YX!]#L
private int size=0; p`fUpARA!
F/tGk9v
private int[] queue; AU -,
A_tdtN<
public int get() { >=G;rs
return queue[1]; tda#9i[pkH
} eGkB#.+J!
Sb+^~M
public void remove() { &xo_93
SortUtil.swap(queue,1,size--); W4%I%&j
fixDown(1); 5/F1|N4
} @SjISZw_
file://fixdown &G\Vn,1v
private void fixDown(int k) { s!:'3[7+
int j; $Ypt /`
while ((j = k << 1) <= size) { A(V,qw8
if (j < size %26amp;%26amp; queue[j] j++; n`8BE9h^
if (queue[k]>queue[j]) file://不用交换 J$F 1sy
break; 2Nrb}LH
SortUtil.swap(queue,j,k); -GJ~xcf0
k = j; ~2PD%+e7]
} s;Q0
} `|)V]<
private void fixUp(int k) { RZoSP(6
while (k > 1) { aZn]8jC%
int j = k >> 1; K~$A2b95
if (queue[j]>queue[k]) hfE5[
break; " R!,5HQF;
SortUtil.swap(queue,j,k); T1%_sq
k = j; "yJFb=Xdq
} L1ro\H
} \f\CK@
o-a\T
} d0``:
S3 12#X(%
} (yA`h@@WS
c|m*< i
SortUtil： NXo$rf:
4zKmoYt
package org.rut.util.algorithm; K~Nx;{{d
6l]jmj)/
import org.rut.util.algorithm.support.BubbleSort; +-~8t^
import org.rut.util.algorithm.support.HeapSort; 1[p6v4qO{
import org.rut.util.algorithm.support.ImprovedMergeSort; Nk?eVJ)
import org.rut.util.algorithm.support.ImprovedQuickSort; sB`.G
import org.rut.util.algorithm.support.InsertSort; e}>3<Dh
import org.rut.util.algorithm.support.MergeSort; ]Y111<Ja
import org.rut.util.algorithm.support.QuickSort; Oxsx\f_
import org.rut.util.algorithm.support.SelectionSort; _}+Aw{7!r
import org.rut.util.algorithm.support.ShellSort; 0"}qND
dyWj+N5(
/** q>|&u
* @author treeroot "QSmxr
* @since 2006-2-2 " b3-'/&
* @version 1.0 WN#S%G:Q)
*/ U/}YpLgdD
public class SortUtil { 0OCmyy
public final static int INSERT = 1; PtsQV!
public final static int BUBBLE = 2; RGEgYOO
public final static int SELECTION = 3; 7}#zF]vHNi
public final static int SHELL = 4; B^Sxp=~Au
public final static int QUICK = 5; Gk:tT1
public final static int IMPROVED_QUICK = 6; 5<U:Yy
public final static int MERGE = 7; 4N6JKS
public final static int IMPROVED_MERGE = 8; AS4mJ UU9
public final static int HEAP = 9; 4}4cA\B:n
tE'^O< K
public static void sort(int[] data) { DpQ\q;
sort(data, IMPROVED_QUICK); =T!eyGE
} 59Lc-JJ
private static String[] name={ p{|!LcSU$2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W_.WMbT
}; <qGxkV
Fz11/sKz
private static Sort[] impl=new Sort[]{ g'cLc5\
new InsertSort(), %\"<lyD
new BubbleSort(), UahsX
new SelectionSort(), ;n,xu0/
new ShellSort(), mqj]=Fq*
new QuickSort(), BSH2Kq
new ImprovedQuickSort(), *T6*Nxs0k
new MergeSort(), +~(SeTY
new ImprovedMergeSort(), KE[!{O^(a
new HeapSort() C&|K7Zp0v
}; jYUN:
L:j3
public static String toString(int algorithm){ d!{]CZ"@
return name[algorithm-1]; %(&$CmS@
} CKI.\o
uM)#T*(
public static void sort(int[] data, int algorithm) { Znw3P|>B
impl[algorithm-1].sort(data); 8+i=u"<
} fHK.q({Qc
&R5zt]4d&
public static interface Sort { A=W:}szt]
public void sort(int[] data); _mWVZ1P
} ]*?lgwE
&&% oazR=
public static void swap(int[] data, int i, int j) { k,eo+qH.Hz
int temp = data; }ChScY
data = data[j]; | |"W=E
data[j] = temp; LXoZ.3S
} <$(y6+lY
} 4mjlat(d