[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; }O<=!^Y;A
} 3!,XR\`[
int i1=l; @i$9c)D
int i2=mid+1; }tua0{N:z
for(int cur=l;cur<=r;cur++){ SwV0q
if(i1==mid+1) SLD%8:Zn
data[cur]=temp[i2++]; b{b2L.
else if(i2>r) O!\P]W4r$
data[cur]=temp[i1++]; 25::z9i
else if(temp[i1] data[cur]=temp[i1++]; O0i_h<T
else o(u&n3Q'
data[cur]=temp[i2++]; '_@Y
} T7'njaLec
} >hJ$~4?
|K,9EM3
} fJH09:@^%
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改进后的归并排序: :0Rd )*k,v
u-qg9qXJb
package org.rut.util.algorithm.support; 7(QRG\G#
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import org.rut.util.algorithm.SortUtil; 6p1\#6#@
S>/p6}3]
/** M-e!F+d{od
* @author treeroot gG>1
* @since 2006-2-2 2+s_*zM-
* @version 1.0 )~rfx
*/ |ITp$_S
public class ImprovedMergeSort implements SortUtil.Sort { 4askQV &hj
" 2Dz5L1v
private static final int THRESHOLD = 10; dpDVEEs84
N&]v\MjI62
/* [}9sq+##
* (non-Javadoc) \ExM.T
* =!*e; L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /XeDN-{
*/ 0k@4;BYu
public void sort(int[] data) { osoreo;V^
int[] temp=new int[data.length]; d(3F:dbk
mergeSort(data,temp,0,data.length-1); X*KQWs.
} X|TEeE c[L
9TIyY`2!
private void mergeSort(int[] data, int[] temp, int l, int r) { h3Nwxj~E
int i, j, k; %[u6<
int mid = (l + r) / 2; Kyt.[" p
if (l == r) !hrXud=#"
return; XI} C|]#
if ((mid - l) >= THRESHOLD) GbFLu`Iu
mergeSort(data, temp, l, mid); y<W?hE[
else 2?u>A3^R
insertSort(data, l, mid - l + 1); AjKP -[
if ((r - mid) > THRESHOLD) 9c1g,:8\
mergeSort(data, temp, mid + 1, r); =Mzg={)v
else cv=nGFx6
insertSort(data, mid + 1, r - mid); l"5$6h
s:'M[xI
for (i = l; i <= mid; i++) { ZR.1SA0x?O
temp = data; [^EU'lewnW
} w,bILv)
for (j = 1; j <= r - mid; j++) { /;-KWu+5=
temp[r - j + 1] = data[j + mid]; |NJe4lw+?
} L(\sO=t
int a = temp[l]; jV]'/X<
int b = temp[r]; 3FT%.dV^
for (i = l, j = r, k = l; k <= r; k++) { *Z>Yv37P
if (a < b) { Zf68EB
data[k] = temp[i++]; 'b:e`2fl
a = temp; 7F5t&
} else { e^&QT
data[k] = temp[j--]; 'YIFHn$!
b = temp[j]; g]EDL<b
} lTY%,s
} +c.A|!-
} l=8)_z;~D
6&M $S$y
/** *:J#[ET,
* @param data xphw0Es
* @param l (#Z2
* @param i 7}OzTup
*/ Fvf308[
private void insertSort(int[] data, int start, int len) { S~d_SU~>`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); I+Qv$#S/
} &I Iw>,,
} 1mhX3
} (Z"QHfO'
} [HI&>dm=$
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堆排序： LTj;e[
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package org.rut.util.algorithm.support; nF~</>
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import org.rut.util.algorithm.SortUtil; vo)pT
4!p~Mr[E
/** )^7Y^ue
* @author treeroot sDT(3{)L7
* @since 2006-2-2 0,)B~|+
* @version 1.0 W{O:j
*/ GenkYtS
public class HeapSort implements SortUtil.Sort{ e48`cX\E
YLmzMD>
/* (non-Javadoc) .281;] =
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]as_7
*/ #t:]a<3Y2
public void sort(int[] data) { `2c>M\c4U
MaxHeap h=new MaxHeap(); -CfGWO#Gbx
h.init(data); Zx,R6@l
for(int i=0;i h.remove(); ZKzXSI4
System.arraycopy(h.queue,1,data,0,data.length); :*gYzk8
} aehGT|
!`q*{Ojx
private static class MaxHeap{ EF=.L{
ZZOBMF7
void init(int[] data){ v+U( #"
this.queue=new int[data.length+1]; Xoyk 'T]-
for(int i=0;i queue[++size]=data; qIcQPJn!}
fixUp(size); u.*@lGVW
} g <^Y^~+E
} |={><0
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private int size=0; Nr=ud QA{
;v'7l>w3\w
private int[] queue; hYMIe]kJ
;<`F[V Zau
public int get() { ?P@fV'Jo
return queue[1]; ztf VXmi'
} C`+g:qT
;"SnCBt:>
public void remove() { $3S6{"
SortUtil.swap(queue,1,size--); fI>>w)5
fixDown(1); ?#!Hm`\.
} kKVd4B[#*
file://fixdown %[\: 8
private void fixDown(int k) { jK/2n}q&]
int j; H1_XEcaM+*
while ((j = k << 1) <= size) { s|rlpd4y
if (j < size %26amp;%26amp; queue[j] j++; (__=*ew
if (queue[k]>queue[j]) file://不用交换 4)BZ%1+
break; bhe~ekb
SortUtil.swap(queue,j,k); D.Rk{0se8
k = j; .NcoST9a
} wLC!vX.S
} wH=
private void fixUp(int k) { 4@OnMj{M
while (k > 1) { \s?OvqI:
int j = k >> 1; V2sWcV?
if (queue[j]>queue[k]) !Rk1q&U5
break; y ,isK
SortUtil.swap(queue,j,k); _=E))Kp{z
k = j; (oX|lPD<b
} fx %Y(W#5
} \}xK$$f2,
I"Y d6M% ;
} 4*MjDb
_a@&$NEox
} )tR5JK} AV
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SortUtil： pg~vteq5
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package org.rut.util.algorithm; /:v+:-lU
(-*NRY3*
import org.rut.util.algorithm.support.BubbleSort; Q:eIq<erY
import org.rut.util.algorithm.support.HeapSort; H+vONg
import org.rut.util.algorithm.support.ImprovedMergeSort; C-d|;R}Ww
import org.rut.util.algorithm.support.ImprovedQuickSort; }qmBn`3R
import org.rut.util.algorithm.support.InsertSort; u8qL?Aj^
import org.rut.util.algorithm.support.MergeSort; x%d+~U;$&
import org.rut.util.algorithm.support.QuickSort; _F>1b16:/P
import org.rut.util.algorithm.support.SelectionSort; vF"<r,pg
import org.rut.util.algorithm.support.ShellSort; gP8Fe =]
0fA42*s;
/** ]#R'hL%f
* @author treeroot ^@ s!"c
* @since 2006-2-2 :J]S+tQ)
* @version 1.0 WsRG>w3"
*/ =Xze).g
public class SortUtil { 44FK%TmtF
public final static int INSERT = 1; ! utgo/n
public final static int BUBBLE = 2; H|;6K`O_
public final static int SELECTION = 3; `M/=_O3
public final static int SHELL = 4; yLCqlK
public final static int QUICK = 5; zy`4]w$Lj+
public final static int IMPROVED_QUICK = 6; fv$Y&_,5
public final static int MERGE = 7; jb1OcI%
public final static int IMPROVED_MERGE = 8; A]R7H1
public final static int HEAP = 9; ^tX+<X
/ U1VE|T
public static void sort(int[] data) { n4\6\0jq6
sort(data, IMPROVED_QUICK); R9&T0Qf
} XRXKO>4q
private static String[] name={ )bRe"jxn7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" iz]Vb{5n%
}; DR3M|4[
fl _k5Q'&p
private static Sort[] impl=new Sort[]{ hnZI{2XzBE
new InsertSort(), =o;QvOS;
new BubbleSort(), -v?,{?$0
new SelectionSort(), &&$/>[0=.
new ShellSort(), Sxf|gDC
new QuickSort(), !e@G[%k
new ImprovedQuickSort(), rubqk4
new MergeSort(), a OR}
new ImprovedMergeSort(), I8HUH*|)n
new HeapSort() {:m5<6?x)
}; dVc;Tt
uA=6 HpDB
public static String toString(int algorithm){ oc'#sE
return name[algorithm-1]; HRIf)n&~f
} *V#v6r7<Y/
G}ElQD
public static void sort(int[] data, int algorithm) { W=M&U
impl[algorithm-1].sort(data); ^(m`5]qr7J
} L(TO5Y]
>0)E\_ u
public static interface Sort { YM{Q)115
public void sort(int[] data); ;y<)RM
} &N1C"Eov?
:}x\&]uC#k
public static void swap(int[] data, int i, int j) { (bt^L3}a
int temp = data; heoOOP(#
data = data[j]; SFoF]U09
data[j] = temp; $de_>
} (Tp+43v
} RtH[OZu(8