[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; }TmOoi(X@
} ~~tTr$
int i1=l; %ou,|Dww
int i2=mid+1; {ez$kz
for(int cur=l;cur<=r;cur++){ `>gG"1,]
if(i1==mid+1) 5p;AON
data[cur]=temp[i2++]; 'o>)E>
else if(i2>r) ;b$P*dSG}
data[cur]=temp[i1++]; >lQo _p(;
else if(temp[i1] data[cur]=temp[i1++]; 1-KNXGb'
else I`kfe`_
data[cur]=temp[i2++]; 9DxHdpOk
} `8:)? 0Ez
} CLR1CGnn7
O VV@
} Rh!UbEPjC
06&J!,p :
改进后的归并排序: :C~Ar]
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package org.rut.util.algorithm.support; M!UTqf7XL
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import org.rut.util.algorithm.SortUtil; .DCHc,DxA
hi7_jl6
/** -+#%]P8l
* @author treeroot Gm=qn]c
* @since 2006-2-2 ZZw`8 E
* @version 1.0 -Zt!H%U
*/ RZOK+!H:
public class ImprovedMergeSort implements SortUtil.Sort { i"2OsGT
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private static final int THRESHOLD = 10; 4CNrIF@
D*XrK0#Z`
/* QQ*sjK.(
* (non-Javadoc) o.+;]i}D
* Dp@XAyiA[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NB-dlv1
*/ oxwbq=a6yV
public void sort(int[] data) { [2%[~&4
int[] temp=new int[data.length]; bz4Gzp'6k
mergeSort(data,temp,0,data.length-1); Hq3|>OqC2Q
} *LT~:Gs#
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private void mergeSort(int[] data, int[] temp, int l, int r) { 1|bXIY.J*
int i, j, k; +#}GmUwPG$
int mid = (l + r) / 2; d>NGCe
if (l == r) 7FB?t<x
return; B VBn.ut
if ((mid - l) >= THRESHOLD) ]P4WfV d
mergeSort(data, temp, l, mid); R=D]:u<P
else Njq}M/{U
insertSort(data, l, mid - l + 1); o-,."|6
if ((r - mid) > THRESHOLD) vwCQvt
mergeSort(data, temp, mid + 1, r); rPV Q#iB
else (I[_}l
insertSort(data, mid + 1, r - mid); 615Ya<3f8
,6)N.
for (i = l; i <= mid; i++) { ks405
temp = data; wj)LOA0
} vB:\ZX4
for (j = 1; j <= r - mid; j++) { Y"Cf84E
temp[r - j + 1] = data[j + mid]; @=-(H<0
} P"YdB|I
int a = temp[l]; 1'kO{Ge*p:
int b = temp[r]; \Z-th,t
for (i = l, j = r, k = l; k <= r; k++) { q6 CrUn
if (a < b) { !b8V&<
data[k] = temp[i++]; F'bwXb**
a = temp; }K{1Bm@S
} else { "F F$Q#)
data[k] = temp[j--]; _jWs(OmJ
b = temp[j]; E$d#4x
} 5E!C?dv(z
} OgQdyU
} ]?9*Vr:P^
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/** mypV[
* @param data K$"#SZEi
* @param l Ayz*2N`%
* @param i > I2rj2M#
*/ u[>"_!T
private void insertSort(int[] data, int start, int len) { v88vr
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 87 Z[0>
} #mxOwvJ
} !Sc"V.o@!
} L^J4wYFTO
} ]e>qvSuYh
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堆排序： bLqy7S9x
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package org.rut.util.algorithm.support; DUp`zW;B
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import org.rut.util.algorithm.SortUtil; 8-Abg:)
,OE&e*1
/** tKbxC>w
* @author treeroot /cjz=r1U>
* @since 2006-2-2 P/%7kD@5;
* @version 1.0 6h 0qtXn-
*/ 5`;SI36"
public class HeapSort implements SortUtil.Sort{ 4TtC~#D:
iaGA9l<b
/* (non-Javadoc) j=WxtMS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) coP->&(@U#
*/ +m=b "g
public void sort(int[] data) { %(CC
MaxHeap h=new MaxHeap(); f56yI]*N=<
h.init(data); Jo?LPR \6
for(int i=0;i h.remove(); VB |?S|<
System.arraycopy(h.queue,1,data,0,data.length); %hB-$nE
} l.Q
W .a>K$
private static class MaxHeap{ n,N->t$i
#bOv}1,s
void init(int[] data){ M/3;-g
this.queue=new int[data.length+1]; ]OAU&t{
for(int i=0;i queue[++size]=data; Z@~gN5@,M
fixUp(size); Kb~nC6yJc
} _4{0He`q
} ,=/9Ld2w9
,Py\Cp=Dw
private int size=0; Sd+5Uf`
qv!(In>u
private int[] queue; <=(K'eqC^
7 N}@zPAZ
public int get() { 7Cz~nin>7
return queue[1]; 26V6Y2X
} ysaRH3M
r~b.tpH
public void remove() { a>4/2#J
SortUtil.swap(queue,1,size--); Dri6\/0
fixDown(1); qe]D4K8`Q3
} I?T !
file://fixdown {^]qaQ[5N
private void fixDown(int k) { UZdnsG7
int j; hf`y_H+\7
while ((j = k << 1) <= size) { x39tnf/F
if (j < size %26amp;%26amp; queue[j] j++; N,`@Q7
if (queue[k]>queue[j]) file://不用交换 h ldZA
break; xP8/1wd.
SortUtil.swap(queue,j,k); #MC#K{Xd
k = j; &;Ncc,jb
} O,$*`RZpx
} fB2ILRc
private void fixUp(int k) { ak7%
while (k > 1) { \XDiw~0
int j = k >> 1; l\_!oa~
if (queue[j]>queue[k]) ?1Nz ,Lc$
break; kQ\GVI11?
SortUtil.swap(queue,j,k); ]TvMT
k = j; x[A|@\Z
} 757&bH|a
} l)r\SE1
y-pdAkDh
} |nMjv]#
01(U)F\
} [* xdILj
7F`\Gz_2
SortUtil： Ar-Vu{`
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package org.rut.util.algorithm; <IrhR,@M,L
Q%CrB>|@
import org.rut.util.algorithm.support.BubbleSort; Q Xd`P4a
import org.rut.util.algorithm.support.HeapSort; }T_"Vg q
import org.rut.util.algorithm.support.ImprovedMergeSort; W ?x~"-*
import org.rut.util.algorithm.support.ImprovedQuickSort; fh#:j[R4e
import org.rut.util.algorithm.support.InsertSort; yQJ0",w3o.
import org.rut.util.algorithm.support.MergeSort; V_i&@<J
import org.rut.util.algorithm.support.QuickSort; 8)>>EN8 R
import org.rut.util.algorithm.support.SelectionSort; GcM1*)$ 4
import org.rut.util.algorithm.support.ShellSort; :tWkK$
PYQ0&;z
/** xM())Z|2
* @author treeroot O%t? -h
* @since 2006-2-2 = MByD&o`
* @version 1.0 5;`Ot2
*/ kEh9J>|M
public class SortUtil { {-)^?Zb @
public final static int INSERT = 1; Csyh 'v
public final static int BUBBLE = 2; 6;E3|st1X
public final static int SELECTION = 3; ,Uh^e]pC
public final static int SHELL = 4; |=5zI6pT
public final static int QUICK = 5; "8Dm7)nB
public final static int IMPROVED_QUICK = 6; lz^Vi!|p
public final static int MERGE = 7; uh\G6s!4/
public final static int IMPROVED_MERGE = 8; 5K Ij}VN
public final static int HEAP = 9; (N/u@M
=Ti!9_~
public static void sort(int[] data) { :ok.[q
sort(data, IMPROVED_QUICK); 4 95Y<x}=
} 65Z}Hf
private static String[] name={ gX"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5Q"yn2b4
}; bI.hG32
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private static Sort[] impl=new Sort[]{ Sr+hB>{
new InsertSort(), =1Plu5
new BubbleSort(), vhMoCLb
new SelectionSort(), nscnG5'{+
new ShellSort(), 5,xPB5pK
new QuickSort(), ( yLu=
new ImprovedQuickSort(), dr)*.<_+a(
new MergeSort(), _J*l,]}S
new ImprovedMergeSort(), Le83[E*i
new HeapSort() 0 Rb3|te
}; v:lkvMq|=
(o{Y;E@/y
public static String toString(int algorithm){ V;^-EWNj
return name[algorithm-1]; ^aqQw u
} l#uF%;GDX
uV|F3'jT
public static void sort(int[] data, int algorithm) { 5$ How!
impl[algorithm-1].sort(data); @Ez>?#z
} #ChTel
(YJ2- X~
public static interface Sort { H2iIBGu|L
public void sort(int[] data); k8G4CFg}wP
} PY|zN|
ZQ"dAR/y
public static void swap(int[] data, int i, int j) { P%B|HnG^
int temp = data; mN-O{k0\
data = data[j]; +:Xg7H*
data[j] = temp; 'oz$uvX
} !bzWgD7j
} =nHkFi@D=t