[JAVA]用Java实现的各种排序

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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; <e)o1+[w
} a`E*\O'd
int i1=l; x|0:P sE
int i2=mid+1; #5&jt@NS
for(int cur=l;cur<=r;cur++){ .fzu"XAPu
if(i1==mid+1) cBYfXI0`
data[cur]=temp[i2++]; 'r} zY-FM`
else if(i2>r) 3L_I[T$s
data[cur]=temp[i1++]; TwvAj#j
else if(temp[i1] data[cur]=temp[i1++]; a=xT(G0Re
else Sd))vS^g
data[cur]=temp[i2++]; w?mEuXc
} K'1~^)*
} F_ 7H!F
"BVdPSDBk
} _P,^_%}V06
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改进后的归并排序: #hL*rbpT
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package org.rut.util.algorithm.support; DjCx~@
/%n`V
import org.rut.util.algorithm.SortUtil; ~~F2Ij
1%J.WH6eQ
/** `Zz uo16
* @author treeroot ;pJ2V2 g8
* @since 2006-2-2 aF8k/$u
* @version 1.0 /}5B&TZ=(3
*/ _2hXa!yO
public class ImprovedMergeSort implements SortUtil.Sort { k$Rnj`*^
,WWj-X|+=
private static final int THRESHOLD = 10; ]lS@}W\
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/* k_GP>b\"k
* (non-Javadoc) p|XAlia
* 8I+d)(:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g):]'
*/ ?Qqd "=k4
public void sort(int[] data) { va|rO#.=
int[] temp=new int[data.length]; 'GJVWpvUU
mergeSort(data,temp,0,data.length-1); MR'o{?{e`
} ~2uh'e3
] c}91
private void mergeSort(int[] data, int[] temp, int l, int r) { JmOW~W
int i, j, k; N;HIsOT}t
int mid = (l + r) / 2; fT Y/4(
if (l == r) !q4x~G0d
return; %do1i W
if ((mid - l) >= THRESHOLD) h4fLl3%H
mergeSort(data, temp, l, mid); pKJK9@Ad
else LD(C\
insertSort(data, l, mid - l + 1); V/"}ku
if ((r - mid) > THRESHOLD) /&Jv,[2kV
mergeSort(data, temp, mid + 1, r); 7\/5r.
else 4p)e}W*
insertSort(data, mid + 1, r - mid); $E(XjuS
_qWC4NMF(
for (i = l; i <= mid; i++) { 9 1P4:6
temp = data; V*65b(q)
} AxCI 0
for (j = 1; j <= r - mid; j++) { PI|`vC|yy&
temp[r - j + 1] = data[j + mid]; *]s&8/Gmb
} ';RI7)<
int a = temp[l]; x:5dCI
int b = temp[r]; ?RD *1
for (i = l, j = r, k = l; k <= r; k++) { tSv0" L
if (a < b) { +=cam/A
data[k] = temp[i++]; We`'>'W0
a = temp; IS]{}Y\3H
} else { gbOCR1PBg
data[k] = temp[j--]; \gccQig1CJ
b = temp[j]; mog9jw
} b>cafu
} /N^~U&7
} \&A+s4c")
w@]jpH;WX
/** mVm4fHEYwU
* @param data 'I/h(
* @param l hSqMaX%G
* @param i 2HOe__Ns
*/ M?o{STt
private void insertSort(int[] data, int start, int len) { 9 Aivf+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "dN< i
} !Qu PG/=X
} `?o=*OS7Y
} H`<?<ak6'M
} sms1%%~
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堆排序： oL *n>dH
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package org.rut.util.algorithm.support; 17py).\
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import org.rut.util.algorithm.SortUtil; q#1X[A()
aqQ o,5U>
/** /jrY%C
* @author treeroot Etmo78e
* @since 2006-2-2 UR>_)*
* @version 1.0 sp8[cO=
*/ qw:9zYG}qW
public class HeapSort implements SortUtil.Sort{ T_L6 t66I
!p%@Deu
/* (non-Javadoc) t*+! n.p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t.3\/
*/ 0K3Hf^>m
public void sort(int[] data) { B1w0cS%%:
MaxHeap h=new MaxHeap(); !Q[}s#g
h.init(data); Oje|bxQ
for(int i=0;i h.remove(); I]sqi#h$2W
System.arraycopy(h.queue,1,data,0,data.length); 1*R_"#
} J%r7<y\
d)*(KhYie@
private static class MaxHeap{ _'*DT=H'U
wr@GN8e`
void init(int[] data){ u 2lXd'
this.queue=new int[data.length+1]; +#v4B?NR
for(int i=0;i queue[++size]=data; |[wyc!nY).
fixUp(size); w~v<v&
} <;KRj85"j
} u[`v&e
iwz` x
private int size=0; M]0^ind
}=pOiILvD
private int[] queue; QV)}3pW
Gm@iV,F%R
public int get() { T{ nQjYb?
return queue[1]; wG:$6
} e 2*F;.)
LV=^jsQ5
public void remove() { ;l`X!3
SortUtil.swap(queue,1,size--); lQr6;D}+
fixDown(1); -RCv7U`
} !d|8'^gc
file://fixdown j&llrN
private void fixDown(int k) { AFtCqq#[
int j; El1:?4;
while ((j = k << 1) <= size) { zPE#[\O21B
if (j < size %26amp;%26amp; queue[j] j++; %Ht^yemQ
if (queue[k]>queue[j]) file://不用交换 ;siJ~|6)
break; b7f0#*(?
SortUtil.swap(queue,j,k); 0Q*-g}wXfS
k = j; j/`Up
} LI:?Y_r
} ;x RjQR
private void fixUp(int k) { Z]e4pR6!
while (k > 1) { ~GYpat
int j = k >> 1; G*Ib^;$u
if (queue[j]>queue[k]) "0<Sd?Sz
break; iiehrK&T!
SortUtil.swap(queue,j,k); DrV0V .t,
k = j; |?|K\UF(Y
} 0i_
} b7qnOjC
Ix4jof6(
} !a)s`
$*aE$O6l
} xrX?ZJ
Dwk$CJb3-
SortUtil： /\TlO.B=
rN'.&;Y5
package org.rut.util.algorithm; &V FjHW
|Pj9ZG#
import org.rut.util.algorithm.support.BubbleSort; ]#M/$?!]g2
import org.rut.util.algorithm.support.HeapSort; H&u4v2
import org.rut.util.algorithm.support.ImprovedMergeSort; I4CHfs"ar
import org.rut.util.algorithm.support.ImprovedQuickSort; afV P-m4L
import org.rut.util.algorithm.support.InsertSort; &Ky3Jb<:Gt
import org.rut.util.algorithm.support.MergeSort; ax;{MfsK
import org.rut.util.algorithm.support.QuickSort; T!&jFy*W
import org.rut.util.algorithm.support.SelectionSort; ->Q`'@'|P
import org.rut.util.algorithm.support.ShellSort; )MMhlcNC
<Q\H
/** g!.Ut:8L9
* @author treeroot sOjF?bCdO
* @since 2006-2-2 \/X{n*Hw?
* @version 1.0 1wU=WE(kKZ
*/ f^ywW[dF
public class SortUtil { /H.(d 4C
public final static int INSERT = 1; ^,~N7`
public final static int BUBBLE = 2; T:dX4=z
public final static int SELECTION = 3; Y+OYoI
public final static int SHELL = 4; <XY;fhnB
public final static int QUICK = 5; Iy6p>z|
public final static int IMPROVED_QUICK = 6; i)GeX:
public final static int MERGE = 7; olHH9R9:
public final static int IMPROVED_MERGE = 8; c-ttds
public final static int HEAP = 9; sio)_8tp
CF,8f$:2
public static void sort(int[] data) { /bu'6/!`
sort(data, IMPROVED_QUICK); KuU3DTS85Z
} .wM:YX'[G
private static String[] name={ !k%l+I3J[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Gmqs`{tc
}; kf}F}Ad:%
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private static Sort[] impl=new Sort[]{ 5>N6VeM
new InsertSort(), y4 dp1<t%
new BubbleSort(), kT>r<`rt
new SelectionSort(), 9$:QLE+t
new ShellSort(), -MQZiq7H4
new QuickSort(), @*bvMEE
new ImprovedQuickSort(), Zm`'MsgFr
new MergeSort(), :QxL 9&"
new ImprovedMergeSort(), +p8qsT#7
new HeapSort() T-hU+(+hg
}; 9*7Hoi4Ji
[0d-CEp[
public static String toString(int algorithm){ H-;&xzAI
return name[algorithm-1]; v&k>0lV,^
} l7!U),x%/U
Xs{:[vRW
public static void sort(int[] data, int algorithm) { =W;t@"6>2
impl[algorithm-1].sort(data); TEH*@~P"
} )RpqZe/h4
oqm
public static interface Sort { L`<T'3G
public void sort(int[] data); `wP/Zp{Hy
} %kFTnXHK
200L
public static void swap(int[] data, int i, int j) { HGU?bJ~6o
int temp = data; iMP*]K-O
data = data[j]; }<6oFUZ
data[j] = temp; T][-'0!
} bbE bf !E
} KyuA5jQ7