[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; @[n#-!i
} @RoZd?
int i1=l; Pv'Q3O2<I
int i2=mid+1; ?"d$SK"6Z
for(int cur=l;cur<=r;cur++){ n"(!v7YNp
if(i1==mid+1) mOE *[S)
data[cur]=temp[i2++]; .;?!I_`
else if(i2>r) po*G`b;v
data[cur]=temp[i1++]; m^_=^z+
else if(temp[i1] data[cur]=temp[i1++]; x)::^'74
else iEvQ4S6tD
data[cur]=temp[i2++]; 1-_r\sb
} BN_h3|)
} Zzlf1#26\
8-2`S*
} MYAt4cHc2
OR<+y~Rv
改进后的归并排序: 3z+l-QO8
R?xb1yc7_
package org.rut.util.algorithm.support; "7B}hZ^)W
}|P3(*S
import org.rut.util.algorithm.SortUtil; }E 'r?N
|mb2<!ag{
/** 7j]v_2S`
* @author treeroot JVE\{ e)
* @since 2006-2-2 qLN\%}69/
* @version 1.0 z5>I9R^q;
*/ -pu5O9 @
public class ImprovedMergeSort implements SortUtil.Sort { "z~ba>,-\
H9cPtP~a)
private static final int THRESHOLD = 10; un{ZysmtB6
m@4Dz|
/* C?<pD+]b_
* (non-Javadoc) f`9Mcli!
* +hxG!o?O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QZ a.c
*/ '/W$9jm
public void sort(int[] data) { Z>rY9VvWD
int[] temp=new int[data.length]; (`tRJWbdz
mergeSort(data,temp,0,data.length-1); :L[>!~YG_n
} /A=w`[<
4DA34m(
private void mergeSort(int[] data, int[] temp, int l, int r) { 4<efj
int i, j, k; l:85 _E
int mid = (l + r) / 2; AYts &+
if (l == r) ]{>AU^=U
return; h@:K=ggK
if ((mid - l) >= THRESHOLD) _P;D.>?
mergeSort(data, temp, l, mid); xA] L0h]
else "/W[gP[y%
insertSort(data, l, mid - l + 1); }Z!D?(
if ((r - mid) > THRESHOLD) c`a(
mergeSort(data, temp, mid + 1, r); }r,\0Wm
else kBu{ bxL
insertSort(data, mid + 1, r - mid); f-b],YE
;a:H-iC
for (i = l; i <= mid; i++) { ^kez]>
temp = data; G-aR%]7$g
} zsFzg.$3&
for (j = 1; j <= r - mid; j++) { ?e7]U*jEU
temp[r - j + 1] = data[j + mid]; LFp "Waiv
} V2MOD{Maat
int a = temp[l]; o96C^y{~S
int b = temp[r]; zzqJeIS
for (i = l, j = r, k = l; k <= r; k++) { 3*b5V<}'|
if (a < b) { UtZ,q!sg
data[k] = temp[i++]; zZ5:)YiW-
a = temp; zkQ[<
} else { "t@p9>
data[k] = temp[j--]; WjV15\,
b = temp[j]; MmuT~d/
} uV/5f#)
} TJ|Jv8j<s
} :+rGBkw1m
A'WR!*Yt
/** "q@m6fs
* @param data 4M'>oa
* @param l +6m.f,14q
* @param i NFK`,
*/ /7Q|D sa
private void insertSort(int[] data, int start, int len) { M`xiC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \l%xuT
} 6*OL.~WE
} ~(5r+Z}*`
} [}RoZB&I
} RaZ>.5 D
iCt.rr~;V
堆排序： Xlo7enzY
:|7#D,2
package org.rut.util.algorithm.support; rr<E#w
{7o#Ve
import org.rut.util.algorithm.SortUtil; S}m_XR]
q2GW3t
/** )8Va%{j
* @author treeroot p7h#.m~Qu
* @since 2006-2-2 +Y\:Q<eMFg
* @version 1.0 oFY!NMq}:
*/ %|Ps|iV
public class HeapSort implements SortUtil.Sort{ l,ENMKA^D
|"H 2'L$
/* (non-Javadoc) BHXi g~d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tAX*CMW
*/ ,Q`qnn&
public void sort(int[] data) { . ,7bGY 1$
MaxHeap h=new MaxHeap(); )?n'ZhsX
h.init(data); NnZW@ln"|
for(int i=0;i h.remove(); xO$P C,
System.arraycopy(h.queue,1,data,0,data.length); n*4`Tduu^
} \P\Z<z7jy
L`NIYH<^
private static class MaxHeap{ ]@q%dsz
Zg;$vIhn
void init(int[] data){ _z5/&tm_H
this.queue=new int[data.length+1]; 50UdY9E_v}
for(int i=0;i queue[++size]=data; {.Tx70kn
fixUp(size); rk=D5E7
} 6iC>CY3CG
} V0ze7tSG[f
tDByOml8Ix
private int size=0; $JE,u'JQ
3;nOm =I
private int[] queue; 5>532X(0
:=QX^*
public int get() { +`y(S}Z
return queue[1]; p|UL<M9{a]
} bMH~vR
[m~J6WB
public void remove() { ~ELY$G.xl
SortUtil.swap(queue,1,size--); Dc9uq5l
fixDown(1); WhPP4 #
} 6Z\aJ
file://fixdown 0zt]DCdY
private void fixDown(int k) { _k84#E0
int j; &(F c .3m
while ((j = k << 1) <= size) { U,<m%C"
if (j < size %26amp;%26amp; queue[j] j++; =bKDD<(
if (queue[k]>queue[j]) file://不用交换 ^BsT>VSH6
break; 1$E(8"l
SortUtil.swap(queue,j,k); AGhenDNV
k = j; >CB-a :
} 1ni+)p>]
} )ycI.[C
private void fixUp(int k) { I8H3*DE
while (k > 1) { fI.|QD*$b
int j = k >> 1; Xfiwblg
if (queue[j]>queue[k]) y:G%p3h)[
break; ">V&{a-C4
SortUtil.swap(queue,j,k); ["Zvwes#7
k = j; A l[ZU
} "ubp`7%67
} )e(<YST
p1N}2]e
} n,I3\l9
~Xi@#s~
} r. 82RoG?G
K3&xe(
SortUtil： yC' y>f`H
g 9,"u_
package org.rut.util.algorithm; ?sfqg gi
[ATJ! O
import org.rut.util.algorithm.support.BubbleSort; 'g#%>
import org.rut.util.algorithm.support.HeapSort; I~,.@{4
import org.rut.util.algorithm.support.ImprovedMergeSort; Q14zc0N
import org.rut.util.algorithm.support.ImprovedQuickSort; N8A)lYT]_u
import org.rut.util.algorithm.support.InsertSort; IjI'Hx
import org.rut.util.algorithm.support.MergeSort; y-<.l=6A
import org.rut.util.algorithm.support.QuickSort; G e;67
import org.rut.util.algorithm.support.SelectionSort; \gA!)q.;
import org.rut.util.algorithm.support.ShellSort; --h\tj\U
3,PR6a,b'
/** ;lObqs*?>
* @author treeroot <Iw{fj|
* @since 2006-2-2 m*^)#
* @version 1.0 _i_='dsyW/
*/ @9/I^Zk
public class SortUtil { %=**cvVy
public final static int INSERT = 1; XkI'm\W
public final static int BUBBLE = 2; Ny^ 1#R
public final static int SELECTION = 3; x*OdMr\n8?
public final static int SHELL = 4; "vGh/sXW
public final static int QUICK = 5; ,Ckcc
public final static int IMPROVED_QUICK = 6; \,R;
public final static int MERGE = 7; s`yzeo
public final static int IMPROVED_MERGE = 8; (MGgr
public final static int HEAP = 9; Hq.rG-,p
*p/,Z2f
public static void sort(int[] data) { Y?^liI`#
sort(data, IMPROVED_QUICK); z'l$;9(y
} C?qRZB+W#
private static String[] name={ i6Z7O)V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HT<p=o'$Z
}; [>ghs_?dZ
Snr(<u
private static Sort[] impl=new Sort[]{ Jg#0g eU
new InsertSort(), !MoAga_ j
new BubbleSort(), }c G)$E
new SelectionSort(), \,S|>CPQ
new ShellSort(), aM5]cc%
new QuickSort(), 8Lgt
new ImprovedQuickSort(), y._'o7%
new MergeSort(), zPnb_[YF
new ImprovedMergeSort(), u X,n[u
new HeapSort() ('x]@
}; =$OGHc
|WB-Ng
public static String toString(int algorithm){ WK|5:V8E
return name[algorithm-1]; 7z?;z<VJ
} x-i1:W9;
EE9w^.3a
public static void sort(int[] data, int algorithm) { @}y.
impl[algorithm-1].sort(data); (dlp5:lQz
} HH*y$
\'~ E%=Q
public static interface Sort { Jc":zR@5
public void sort(int[] data); '0Cp
} ,HP }}K+S
SKC;@?
public static void swap(int[] data, int i, int j) { oC`F1!SfOO
int temp = data; 96w2qgc2
data = data[j]; 7y$\|WG?!r
data[j] = temp; 9a*#r;R
} ^kfqw0!
} 6Vnq|;W3Zv