[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; KMa?2cJH#
} cqDnZ`|6
int i1=l; 7JbrIdDl|
int i2=mid+1; "\ md
for(int cur=l;cur<=r;cur++){ ryPzq}#
if(i1==mid+1) $v,_8{ !
data[cur]=temp[i2++]; 3c)xNXq m
else if(i2>r) CAfG3;
data[cur]=temp[i1++]; GmFNL/x8-v
else if(temp[i1] data[cur]=temp[i1++]; r.[kD"l
else ?~"RCZ[;.f
data[cur]=temp[i2++]; ~7|z2L
} ~p&sd)
} 3 }XS|Y
oT OMqR{"
} .3#Tw'% G
'0+-Hit?
改进后的归并排序: > ewcD{bt
Pg7/g=Va
package org.rut.util.algorithm.support; 8l6R.l
3$_wAt4w
import org.rut.util.algorithm.SortUtil; 6;Bqu5_Cj
mSs%gL]g
/** $P$OWp?b
* @author treeroot t5S S]
* @since 2006-2-2 TeHR,GB
* @version 1.0 p4=^ UP
*/ #H|]F86(
public class ImprovedMergeSort implements SortUtil.Sort { `J;_!~:
92EvCtf
private static final int THRESHOLD = 10; yfj<P/aA+
%j yLRT]H
/* EG,RlmcPp
* (non-Javadoc) BO^e.iB/
* :^K|u^_>P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;tO(,^
*/ =Z2sQQVS
public void sort(int[] data) { >Tw|SK+3
int[] temp=new int[data.length]; 3/iGSG`
mergeSort(data,temp,0,data.length-1); q*>`HTPcU
} =73wngw
&@yW<<
private void mergeSort(int[] data, int[] temp, int l, int r) { E$gcd#rT
int i, j, k; _15r!RZ:1
int mid = (l + r) / 2; }JS?42CTaV
if (l == r) I<DS07K
return; UPH:$Fk&
if ((mid - l) >= THRESHOLD) YQ&Xd/z-
mergeSort(data, temp, l, mid); >>p3#~/
else X=lOwPvP
insertSort(data, l, mid - l + 1); mDtD7FzJ
if ((r - mid) > THRESHOLD) S>nM&758
mergeSort(data, temp, mid + 1, r); ydw')Em
else bV}43zI.
insertSort(data, mid + 1, r - mid); n(&6E3ZcI
#,Rmu
for (i = l; i <= mid; i++) { wT;D<rqe`
temp = data; ^b'[81%
} 1N2s[ \q$
for (j = 1; j <= r - mid; j++) { 0e&Vvl4DK
temp[r - j + 1] = data[j + mid]; H'GyWG|Wx
} d+$a5 [^9
int a = temp[l]; k \|Hd"T
int b = temp[r]; $w{#o E
for (i = l, j = r, k = l; k <= r; k++) { G0^NkH,k
if (a < b) { k/Z}nz
data[k] = temp[i++]; 't]=ps
a = temp; VUk2pEGO.
} else { u9J;OsnHK
data[k] = temp[j--]; sa{X.}i%E
b = temp[j]; t\X5B]EZ
} zgV{S Qo
} K_(o D O
} 7Q2"]f,$CQ
!ce5pA
/** !h4L_D0
* @param data <^{|5u
* @param l {x s{
* @param i >O?5mfMK
*/ ,*Jm\u
private void insertSort(int[] data, int start, int len) { r!'\$(m E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b+,u_$@B
} f3h^R20qmO
} 5^+>*z
} Mz_*`lRN
} SnRk` 5t
VU9w2/cM
堆排序： s%GhjWZS
CNQ>J`4
package org.rut.util.algorithm.support; 3+rud9T
6"b =aPTi
import org.rut.util.algorithm.SortUtil; ^h1EE=E"
f 0D9Mp
/** l*rli[No
* @author treeroot dX?8@uzu
* @since 2006-2-2 %i:Sf
* @version 1.0 Z7lv|m&
*/ D<78Tm x
public class HeapSort implements SortUtil.Sort{ 2Ck'A0d
'#L.w6<B
/* (non-Javadoc) *DcJ).
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XDRw![H,~
*/ v!JQ;OX
public void sort(int[] data) { x8|sdZFxo
MaxHeap h=new MaxHeap(); &z8I@^<
h.init(data); e@|/, W
for(int i=0;i h.remove(); 5ELKL#(
System.arraycopy(h.queue,1,data,0,data.length); 5srj|'ja
} n$&xVaF|
[oqb@J2
private static class MaxHeap{ !Nua
))JbROBU,
void init(int[] data){ {N!Xp:(<7_
this.queue=new int[data.length+1]; z]:{ruvH
for(int i=0;i queue[++size]=data; XpFW(v
fixUp(size); 8K$q6V%#
} _\uyS',
} @ W[LA<
'[V}]Z>-
private int size=0; X] cI ?
'@t}8J
private int[] queue; [Vzp D 4
no).70K
public int get() { f}qR'ognUu
return queue[1]; {kVhht]X
} 9=D09@A%e
W(.q.Sx>
public void remove() { 6_1v~#
SortUtil.swap(queue,1,size--); 6d4)7PL
fixDown(1); jG~zpZh
} )4u6{-|A
file://fixdown *c<0cHv*
private void fixDown(int k) { A"ApWJ3
int j; NFxs4:] RT
while ((j = k << 1) <= size) { ':Avh|q3N
if (j < size %26amp;%26amp; queue[j] j++; lM/)<I\8
if (queue[k]>queue[j]) file://不用交换 _ljdo`j#N
break; 2g?O+'JD
SortUtil.swap(queue,j,k); *%6NuZ
k = j; vOMmsU F
} q3Tp/M.
} o$disJ
private void fixUp(int k) { bUJ5jkZ)
while (k > 1) { UM[<v9NWE
int j = k >> 1; n^kszIu~
if (queue[j]>queue[k]) "'i" @CR
break; (?[^##03MN
SortUtil.swap(queue,j,k); (x"TM),Q
k = j; tw{V7r~n
} r92C^h0
} y<#?z 8P
B}Lz#'5_
} #*r u*
c^Y&4=>T
} Ro1b (+H
@!;EW R]
SortUtil： AC'$~4
7=Vs1TVc
package org.rut.util.algorithm; o'uv5asdb
k#*tf:R
import org.rut.util.algorithm.support.BubbleSort; =6o,{taZ.~
import org.rut.util.algorithm.support.HeapSort; n+Bh-aV
import org.rut.util.algorithm.support.ImprovedMergeSort; @t W;(8-
import org.rut.util.algorithm.support.ImprovedQuickSort; CY{`IZ
import org.rut.util.algorithm.support.InsertSort; qQzf&"
import org.rut.util.algorithm.support.MergeSort; <0?h$hf4c
import org.rut.util.algorithm.support.QuickSort; /<J&ZoeJB
import org.rut.util.algorithm.support.SelectionSort; iPnu *29
import org.rut.util.algorithm.support.ShellSort; 7*D*nY4+
G?`x$UU
/** Hjho!np
* @author treeroot `/+%mKlC|[
* @since 2006-2-2 SiBhf3
* @version 1.0 Ujw J}j
*/ 7x,c)QES`
public class SortUtil { wTT_jyH)
public final static int INSERT = 1; s*blZdP
public final static int BUBBLE = 2; +s(JutC
public final static int SELECTION = 3; P[|FK(l
public final static int SHELL = 4; IO, kGUS
public final static int QUICK = 5; jSY&P/[xb
public final static int IMPROVED_QUICK = 6; M@LI(;
public final static int MERGE = 7; IIn0w2:i
public final static int IMPROVED_MERGE = 8; m@qM|%(0x
public final static int HEAP = 9; +W=
*TacVp
public static void sort(int[] data) { zP[_ccW@
sort(data, IMPROVED_QUICK); hX?rIx
} ML6V,-KU
private static String[] name={ eh@6trzp=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v7;zce/~
}; M!KHBr
t")+L{
private static Sort[] impl=new Sort[]{ @ P[o
new InsertSort(), ,(%?j]_P2
new BubbleSort(), OI=LuWGQE1
new SelectionSort(), n9qO;X4&
new ShellSort(), ]}K\&ho2
new QuickSort(), m5m'ByX(*
new ImprovedQuickSort(), u9d4zR
new MergeSort(), @PYCl
new ImprovedMergeSort(), CA0SH{PdW&
new HeapSort() c^N'g!on
}; 8XwZJ\5
KK}?x6wV0,
public static String toString(int algorithm){ +Xb )bfN
return name[algorithm-1]; gnAM}
} h"mG\xi
iG:9uDY
public static void sort(int[] data, int algorithm) { bp'qrcFuiL
impl[algorithm-1].sort(data); u!&w"t61Nd
} D)yCuw{M:
P>*g'OK^!G
public static interface Sort { q T16th[D
public void sort(int[] data); [31vx0$_p
} m\3r<*q6
.d\<}\zZ7J
public static void swap(int[] data, int i, int j) { .GJl@==~1
int temp = data; xB&kxW.;
data = data[j]; a6UW,n"n
data[j] = temp; fB\+.eN
} /(`B;?
} U#o5(mK