[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; ?IGp?R^j"
} 6Ryc&z5
int i1=l; M1Q&)am
int i2=mid+1; P#A,(Bke3
for(int cur=l;cur<=r;cur++){ XVs]Y'*x
if(i1==mid+1) >|SIqB<%:
data[cur]=temp[i2++]; $>/d)o
else if(i2>r) 85E$m'0O
data[cur]=temp[i1++]; g}+|0FTV
else if(temp[i1] data[cur]=temp[i1++]; =IL\T8y09
else \'y]mB~k
data[cur]=temp[i2++]; :BxO6@>Xc
} ;#Po}8Y=
} =zn'0g,J4
2O kID WcM
} !td!">r46e
]xvA2!)Q
改进后的归并排序: t!\aDkxo %
t=7Gfv
package org.rut.util.algorithm.support; (U'n1s/X
oRbWqN`F.
import org.rut.util.algorithm.SortUtil; ,3?=W/Um4
!{l% 3'2
/** j([b)k=
* @author treeroot a#1r'z~]}
* @since 2006-2-2 O8Mypv/C
* @version 1.0 XGZZKvp
*/ ;W{z"L;nX
public class ImprovedMergeSort implements SortUtil.Sort { x;[)#>.'
*A9v8$
private static final int THRESHOLD = 10; 8J,^O04<
0j$=KA
/* bm;iX*~
* (non-Javadoc) >.SO2w
* pqg2#@F.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $l,U)
*/ *$7^.eHfdd
public void sort(int[] data) { Y's=31G@
int[] temp=new int[data.length]; 1'~+.92Y
mergeSort(data,temp,0,data.length-1); -, +o*BP
} }<G ae5
UusAsezm:
private void mergeSort(int[] data, int[] temp, int l, int r) { ky !ZJR
int i, j, k; 5{-Hg[+9
int mid = (l + r) / 2; U$D:gZ
if (l == r) ,8*A#cT B
return; -}@C9Ja[?
if ((mid - l) >= THRESHOLD) f.ua,,P.
mergeSort(data, temp, l, mid); 7_Vd%<:
else ${Lrj}93
insertSort(data, l, mid - l + 1); (l][_6Q
if ((r - mid) > THRESHOLD) 0uKm)t/
mergeSort(data, temp, mid + 1, r); tln}jpCw
else i.9}bw 9u@
insertSort(data, mid + 1, r - mid); Le~D"d8
tqA-X[^
for (i = l; i <= mid; i++) { !o'a]8
temp = data; ?z`yNx6
} '\H & EJ'
for (j = 1; j <= r - mid; j++) { (QFZM"G
temp[r - j + 1] = data[j + mid]; )cN=/i
} bIt{kzuQC
int a = temp[l]; mC]Krnx
int b = temp[r]; ,9|7{j|u
for (i = l, j = r, k = l; k <= r; k++) { \ bNDeA&l
if (a < b) { 1|*%
data[k] = temp[i++]; pC4uar
a = temp; $xvwnbq#y
} else { S@\&^1;4Hv
data[k] = temp[j--]; ,DKW_F|
b = temp[j]; 6wiuNGZb
} .O5|d+S
} )$Fw<;4
} @zR_[s
q+YK NXI
/** /\jRr7 Cd
* @param data N}bZdE9F
* @param l 1iY?t
* @param i '@^<c#h]=
*/ j~2t^Qz
private void insertSort(int[] data, int start, int len) { "(F:'J} X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d#,
} /4BYH?*
} IOUzj{G#
} nNM)rW
} e]jzFm~
mpCKF=KL.
堆排序： @(st![i+
>*w(YB]/$V
package org.rut.util.algorithm.support; am WIA`n=
ctC!b{S"@
import org.rut.util.algorithm.SortUtil; .Wyx#9
eR1]<Z$W\
/** ZONe}tv:
* @author treeroot 9T;l*
* @since 2006-2-2 N'5!4JUI
* @version 1.0 BYDOTy/%nJ
*/ &_6B{Q
public class HeapSort implements SortUtil.Sort{ T8QRO%t
BI)$aR
/* (non-Javadoc) -,xsUw4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9%uJ:c?
*/ Y1FP |
public void sort(int[] data) { dJg72?"ka
MaxHeap h=new MaxHeap(); /?8rj3
h.init(data); a_(vpD^
for(int i=0;i h.remove(); 78+PG(Q_M
System.arraycopy(h.queue,1,data,0,data.length); *j= whdw%J
} hz+x)M`Y
b{d@:"
private static class MaxHeap{ szb],)|18
r(qU~re'
void init(int[] data){ 5SY(:!
this.queue=new int[data.length+1]; a)8M'f_z
for(int i=0;i queue[++size]=data; {#1}YGpiVM
fixUp(size); '.DFyHsq
} wg,w;Gle
} RV:%^=V-
-z4pI=
private int size=0; 1vBXO bk
jkIgEF2d*
private int[] queue; O}#h^AU-BS
n P4DHb&5
public int get() { 4jl-?
return queue[1]; A|d(5{:N
} DrB PC@^
!N1DJd
public void remove() { oUBn:Ir@
SortUtil.swap(queue,1,size--); !8O*)=RA
fixDown(1); 8FThu[
} H?>R#Ds-
file://fixdown _YW1Mk1
private void fixDown(int k) { 0xM\+R~,
int j; _ZfJfd~
while ((j = k << 1) <= size) { /K9Tn
if (j < size %26amp;%26amp; queue[j] j++; qJN2\e2~f
if (queue[k]>queue[j]) file://不用交换 }Z_w8+BZ
break; -P<e-V%<
SortUtil.swap(queue,j,k); ]QS?fs Z
k = j; m. G}#/
} d-=/@N!4e
} S]3t{s#JW7
private void fixUp(int k) { x\Bl^1&
while (k > 1) { RAQi&?Ko
int j = k >> 1; --S2lN/:T
if (queue[j]>queue[k]) @<tkwu
break; v'*#P7%Kf
SortUtil.swap(queue,j,k); pN"d~Z8
k = j; mh"&KX86W
} LuB-9[^<
} hSq3LoHV
DDT)l+:XP
} DKu4e
8=H!&+aGh
} sHSZIkB-r
H\7Qf8s|{
SortUtil： t%wC~1
jX79Nm|
package org.rut.util.algorithm; $UAmUQg)}_
t/\J
import org.rut.util.algorithm.support.BubbleSort; #=@( m.k:s
import org.rut.util.algorithm.support.HeapSort; .AOf-a
import org.rut.util.algorithm.support.ImprovedMergeSort; pDO&I]S`q0
import org.rut.util.algorithm.support.ImprovedQuickSort; o })k@-oL
import org.rut.util.algorithm.support.InsertSort; Q"KD O-t
import org.rut.util.algorithm.support.MergeSort; mYf7?I~
import org.rut.util.algorithm.support.QuickSort; F'DO46
import org.rut.util.algorithm.support.SelectionSort; qr[H0f]
import org.rut.util.algorithm.support.ShellSort; mr]IxTv
f\FubL
/** SyFOf
* @author treeroot TOp|Qtn
* @since 2006-2-2 b/:&iG;
* @version 1.0 gwtR<2,p
*/ FOxMt;|M
public class SortUtil { y-qbK0=X4
public final static int INSERT = 1; ^T83E}
public final static int BUBBLE = 2; >L F y:a
public final static int SELECTION = 3; dHV3d'.P
public final static int SHELL = 4; s+;J`_M
public final static int QUICK = 5; A`x_M!m
public final static int IMPROVED_QUICK = 6; (a0q*iC%
public final static int MERGE = 7; L|Zja*
public final static int IMPROVED_MERGE = 8; Gj[`r
public final static int HEAP = 9; pZ?7'+u$L
i#o:V/Z.
public static void sort(int[] data) { @0cQ4}
sort(data, IMPROVED_QUICK); [;3` Aw
} ]03+8#J
private static String[] name={ $Cw> z^}u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" J0@<6~V6o
}; ##~";j
JX%B_eUlAs
private static Sort[] impl=new Sort[]{ B2\R#&X.
new InsertSort(), @C]]VE
new BubbleSort(), 42X N*br
new SelectionSort(), :r%Hsur(
new ShellSort(), Gq_rZo(@
new QuickSort(), byz2u
new ImprovedQuickSort(), ag Za+a
new MergeSort(), 0F$;]zg
new ImprovedMergeSort(), PMER~}^
new HeapSort() ^V]DQ%v"I
}; <BoDLvW>
nX,2jT;@L
public static String toString(int algorithm){ *k)v#;B
return name[algorithm-1]; FV>j !>Y
} kigq(a
X=O}k&
public static void sort(int[] data, int algorithm) { DA'A-C2
impl[algorithm-1].sort(data); VJ1(|v{D4[
} 6q^Tq {I
>iefEv\
public static interface Sort { g wM~W
public void sort(int[] data); _jkH}o '
} W\xM$#)m
T8|aFoHCK
public static void swap(int[] data, int i, int j) { .yp"6S^b
int temp = data; Xq"@Z
data = data[j]; d5?"GFy
data[j] = temp; TNYd_:j
} ^zjQ(ca@"x
} a o_A%?Ld