[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; nfdq y)
} 2i7e#
int i1=l; G7@O`N8'
int i2=mid+1; &:5\"b
for(int cur=l;cur<=r;cur++){ @5VV|Wt=
if(i1==mid+1) Zy0aJN>
data[cur]=temp[i2++]; +4qU>
else if(i2>r) ZA(T
data[cur]=temp[i1++]; L}sx<=8.m
else if(temp[i1] data[cur]=temp[i1++]; g{:<2xI5P
else RJ4. kt
data[cur]=temp[i2++]; '+Xlw
} l=}~v
} IQH[Q9%
Dyg?F )6
} 831JwSR
~1kXUWq3
改进后的归并排序: k2 Q qZxm!
5x8+xw3Eh
package org.rut.util.algorithm.support; (%_n!ip^
f)Xr!7
import org.rut.util.algorithm.SortUtil; {ZsdLF#
0?0Jz
/** 'CR)`G_'[
* @author treeroot `ln1$
* @since 2006-2-2 D y-S98Y
* @version 1.0 '%saL>0
*/ x@>&IBiL
public class ImprovedMergeSort implements SortUtil.Sort { z=7|{G
fJAnKUF)
private static final int THRESHOLD = 10; \qh*E#j
"v-(g9(
/* !j:`7PT\
* (non-Javadoc) GV.A+u
* I97yt[,Yy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s{bdl[7
*/ (C;I*cv
public void sort(int[] data) { HQP}w%8x
int[] temp=new int[data.length]; +}xaQc:0|
mergeSort(data,temp,0,data.length-1); h"+ `13
} MV>$BW
Gi2$B76<
private void mergeSort(int[] data, int[] temp, int l, int r) { zDTv\3rZ4X
int i, j, k; xdvh-%A4
int mid = (l + r) / 2; &>g'$a<[
if (l == r) 0k,-;j,
return; bM,1f/^
if ((mid - l) >= THRESHOLD) 2";SJF'5\
mergeSort(data, temp, l, mid); a2 +~;{?g
else J%H;%ROx
insertSort(data, l, mid - l + 1); _+l1b"^s1
if ((r - mid) > THRESHOLD) U_GgCI)
mergeSort(data, temp, mid + 1, r); rQ`i8GF
else l^MzN
insertSort(data, mid + 1, r - mid); .Dg*\ h
kzn[ =P
for (i = l; i <= mid; i++) { N_pUv
temp = data; Q Fm|-j
} p>vU?eF
for (j = 1; j <= r - mid; j++) { NB_)ZEmF
temp[r - j + 1] = data[j + mid]; vmTs9"ujF,
} @=jWHS
int a = temp[l]; cTTW06^
int b = temp[r]; 3*UR3!Z9 *
for (i = l, j = r, k = l; k <= r; k++) { LUX*P7*B
if (a < b) { vQ}6y
data[k] = temp[i++]; b75$?_+
a = temp; ?p<.Fv8.
} else { uw(NG.4
data[k] = temp[j--]; q$(5Vd:
b = temp[j]; bg,9@ }"F
} 5{e,L>H<
} j^tW Iz
} 39wa|:I
Vwk#qgnX
/** %UUH"
* @param data 9^FziM
* @param l 5irwz4.4
* @param i FGWN}&K
*/ 94skkEj
private void insertSort(int[] data, int start, int len) { CIU1R;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ("~DJ=
} YOr:sb
} GeszgtK{T
} Q\ /uKQ
} M-)RQ-h
X$%4$
堆排序： 2*"Fu:a"`I
.MQ^(
package org.rut.util.algorithm.support; b45|vX+j
=@,Q Dm]L
import org.rut.util.algorithm.SortUtil; tE6!+c<7
i) E|bW;
/** !`1'2BC
* @author treeroot 9O{b]=>wq
* @since 2006-2-2 J^R=dT!
* @version 1.0 ~/^5) g_
*/ _Z5Mw+=19
public class HeapSort implements SortUtil.Sort{ \`V;z~@iA
#mize
/* (non-Javadoc) {7TlN.(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -7J|l
*/ ^7zu<lX
public void sort(int[] data) { }Sy=My89r
MaxHeap h=new MaxHeap(); n -(
h.init(data); Hbv6_H
for(int i=0;i h.remove(); qW:HNEiir
System.arraycopy(h.queue,1,data,0,data.length); T91moRv
} K\"R&{+=
u:0aM}9A
private static class MaxHeap{ lL1k.&|5m
]Q]W5WDe:
void init(int[] data){ F}Vr:~
this.queue=new int[data.length+1]; `Al;vVMRO
for(int i=0;i queue[++size]=data; ctE\ q
fixUp(size); uqz]J$
} }D+}DPL{^
} X7k.zlH7T
iq( )8nxi
private int size=0; `al<(FwGE
>pUtwIP
private int[] queue; =UyLk-P w
jw-0M1B
public int get() { PkI:*\R
return queue[1]; 7{&|;U
} &0f5:M{P
%v20~xW:o
public void remove() { df7wN#kO+
SortUtil.swap(queue,1,size--); N F)~W#
fixDown(1); dOa%9[
} jKt7M>P
file://fixdown Eke5Nb
private void fixDown(int k) { 6Gf?m;
int j; 2-Y<4'>
while ((j = k << 1) <= size) { ;b-XWK=
if (j < size %26amp;%26amp; queue[j] j++; A}eOFu`
if (queue[k]>queue[j]) file://不用交换 mI74x3 [
break; .^B*e6DAD
SortUtil.swap(queue,j,k); pz"0J_xDM
k = j; lNSLs"x^
} ,VO2a mI
} 8WnwQ%;m?
private void fixUp(int k) { |sJSN.8
while (k > 1) { E>l~-PaZY
int j = k >> 1; ~"A+G4jl
if (queue[j]>queue[k]) `OSN\"\ad
break; '],J$ge
SortUtil.swap(queue,j,k); v:H$<~)E|
k = j; |i++0BU
} y5!KXAQ%
} a+n0|CvF
T=ev[ mS
} W6Y]N/v3>
JtER_(.
} |\pbir
#U14-^7
SortUtil： 3Z1CWzq(
O({2ivX
package org.rut.util.algorithm; `V##Y
.V,@k7U,V
import org.rut.util.algorithm.support.BubbleSort; FSND>\>
import org.rut.util.algorithm.support.HeapSort; p,#o<W
import org.rut.util.algorithm.support.ImprovedMergeSort; ob8qe,_'
import org.rut.util.algorithm.support.ImprovedQuickSort; 4:FK;~wM&x
import org.rut.util.algorithm.support.InsertSort; ~@}Bi@*
import org.rut.util.algorithm.support.MergeSort; 5{g?,/(
import org.rut.util.algorithm.support.QuickSort; %7|9sQ:
import org.rut.util.algorithm.support.SelectionSort; `nu''B H
import org.rut.util.algorithm.support.ShellSort; FJMrs[
\-g)T}g,I
/** .mR8q+I6
* @author treeroot <7~'; K
* @since 2006-2-2 A}l3cP; `#
* @version 1.0 WPQ fhr#|
*/ q.;u?,|E/
public class SortUtil { s7F.sg
public final static int INSERT = 1; 4t=G
public final static int BUBBLE = 2; PUUwv_
public final static int SELECTION = 3; B6={&7U2
public final static int SHELL = 4; 'dn]rV0(C
public final static int QUICK = 5; ez|)ph7
public final static int IMPROVED_QUICK = 6; ]9^sa-8
public final static int MERGE = 7; ~sh`r{0
public final static int IMPROVED_MERGE = 8; }~L.qG
public final static int HEAP = 9; Abc)i7!.,.
-qGa]a
public static void sort(int[] data) { 6e|*E`I
sort(data, IMPROVED_QUICK); HAa;hb
} *}*FX+px)
private static String[] name={ nlc "c5;jh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" p>huRp^w
}; $&n=$C&x
F1yqxWHeo
private static Sort[] impl=new Sort[]{ [1S|dc>.O%
new InsertSort(), " )1V]}+m
new BubbleSort(), cz8T
new SelectionSort(), p^w;kN
new ShellSort(), e~=;c
new QuickSort(), JJN.ugT}1
new ImprovedQuickSort(), 9P+-#B
new MergeSort(), vQ 6^xvk]
new ImprovedMergeSort(), ZpQ)IHA.
new HeapSort() cPlZXf
}; ]Gsv0Xk1
s*.hl.k.
public static String toString(int algorithm){ T{-CkHf9Q
return name[algorithm-1]; 5j?3a1l0
} yd d7I&$
\XZ/v*d0
public static void sort(int[] data, int algorithm) { "~|6tQLc
impl[algorithm-1].sort(data); gi1^3R[
} nWw":K<@Q_
Q~#Wf?
public static interface Sort { .(cw>7e3D
public void sort(int[] data); R\!2l|_
} I=`U7Bis"
Fj2BnM3#
public static void swap(int[] data, int i, int j) { ,?^ p(w
int temp = data; ,s"^kFl
data = data[j]; #V~me
data[j] = temp; a.k.n<
} 0Qf,@^zL*
} },{$*f[