[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; q\6ZmKGnT
} Lv?e[GA
int i1=l; )OcG$H NK
int i2=mid+1; *l4`2eqZ
for(int cur=l;cur<=r;cur++){ Kf7v_T/
if(i1==mid+1) #EdsB
data[cur]=temp[i2++]; $3MYr5
else if(i2>r) 4 U`5=BI
data[cur]=temp[i1++]; 0?nm`9v6
else if(temp[i1] data[cur]=temp[i1++]; s\dF7/b
else ;X3bgA']
data[cur]=temp[i2++]; J~vK`+Zs
} !>5!Fb=Sy
} Enj],I
oVSq#I4
} ;iEFG^'tG
R+O[,UM^I~
改进后的归并排序: GiN\@F!
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package org.rut.util.algorithm.support; u?n{r
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import org.rut.util.algorithm.SortUtil; & ]/Z~Vt
Hh1OD?N)
/** [m3k_;[
* @author treeroot p#95Q
* @since 2006-2-2 6+[7UH~pm^
* @version 1.0 ;MR(Eaep
*/ ~?)ST?&
public class ImprovedMergeSort implements SortUtil.Sort { P7GF"/
o!+jPwEU
private static final int THRESHOLD = 10; Ug^v ]B9
"xV9$m>
/* x p#+{}
* (non-Javadoc) "ujt:4p@
* |F 18j9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )cy_d!
*/ -]h3s >t
public void sort(int[] data) { ;tF7GjEp
int[] temp=new int[data.length]; )0:@T)G
mergeSort(data,temp,0,data.length-1); T;%ceLD
} to
'j+J?Y^
private void mergeSort(int[] data, int[] temp, int l, int r) { ?g$dz?^CK&
int i, j, k; 9H<6k*
int mid = (l + r) / 2; LAwl9YnG:
if (l == r) "3i=kvdz
return; L@{5:#-
if ((mid - l) >= THRESHOLD) g2<xr;<t^
mergeSort(data, temp, l, mid); Px)/`'D
else xv{iWJcs
insertSort(data, l, mid - l + 1); m_z1|zM}o
if ((r - mid) > THRESHOLD) H+>l][
mergeSort(data, temp, mid + 1, r); ZdD]l*.\i
else Rz!E=1Y$
insertSort(data, mid + 1, r - mid); F*_mHYa;
H[{ch t h
for (i = l; i <= mid; i++) { \5%T'S@5
temp = data; 0r+%5}|-K
} c!BiGw,;
for (j = 1; j <= r - mid; j++) { 7='M&Za
temp[r - j + 1] = data[j + mid]; *zy0,{bl
} K6.*)7$#
int a = temp[l]; "(+>#
int b = temp[r]; 46dh@&U
for (i = l, j = r, k = l; k <= r; k++) { K/y#hP
if (a < b) { '~E&^K5hr
data[k] = temp[i++]; 5UwaBPj4
a = temp; By8C-jD
} else { ^L;`F
data[k] = temp[j--]; yp=2nU"o
b = temp[j]; MOFIR wVZ+
} he/UvMu
} Xa2QtJq
} (l.`g@(L
`bGAc&,&
/** sYt8NsQ
* @param data 3H%oTgWk
* @param l > @ulvHL
* @param i C`D5``4
*/ uE>2*u\
private void insertSort(int[] data, int start, int len) { xOjCF&W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =J,aBp
} Ywf.,V
} |/g\N,]
} Zjt3U;Y
} DiAPs_@
pbivddi2
堆排序： eA>O<Z1>
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package org.rut.util.algorithm.support; :Q\b$=,:
C,w$)x5kls
import org.rut.util.algorithm.SortUtil; ztG_::QtG]
`?Wak=]g
/** }Y5Sf"~M
* @author treeroot UKx91a}g
* @since 2006-2-2 YXH9Q@Gn
* @version 1.0 <BQ4x.[
*/ 6ZVJ2xs[%
public class HeapSort implements SortUtil.Sort{ !9i,V{$c`"
:<s)QD
/* (non-Javadoc) +EcN[-~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i`Es7 }
*/ 9[|Ql
public void sort(int[] data) { Pe/cwKCI
MaxHeap h=new MaxHeap(); ]7ROCJ;
h.init(data); u|\Lb2Kb:
for(int i=0;i h.remove(); +"a .,-f!
System.arraycopy(h.queue,1,data,0,data.length); ~)}npS;
} D:llGdU#2
j]6j!.1
private static class MaxHeap{ ocy fU=}X
X LPO_tD
void init(int[] data){ "}|n;:r
this.queue=new int[data.length+1]; <UG}P \N
for(int i=0;i queue[++size]=data; `I<*R0Qe
fixUp(size); !E> *Mn
} ;y?,myO
} jj#K[@u
i 4eb\j
private int size=0; 1P4jdp=~
oa+Rr&t'
private int[] queue; 0?ZJJdI3
_ 9Tv*@
public int get() { <?,o {
return queue[1]; *;O$=PE
} ;*+jCL2F
/+Xv(B
public void remove() { ?T70C9
SortUtil.swap(queue,1,size--); }7vX4{Yn
fixDown(1); u|=_!$8
} `Y/DttjL
file://fixdown )oa6;=go
private void fixDown(int k) { &&|*GAjJ
int j; ow ~(k5k:
while ((j = k << 1) <= size) { 0W9,uC2:N
if (j < size %26amp;%26amp; queue[j] j++; ;|b D@%@
if (queue[k]>queue[j]) file://不用交换 xF5q=%n
break; R1X9
SortUtil.swap(queue,j,k); Jk|c!,!
k = j; `Bnp/9q5
} \A _g
} +is;$1rq
private void fixUp(int k) { N>7INK
while (k > 1) { `RfhxzI
int j = k >> 1; cgm]{[f
if (queue[j]>queue[k]) j|KZ HH%dc
break; r<Ll>R
SortUtil.swap(queue,j,k); ge[f/"u
k = j; p}!rPd*
} Dq Kk9s;6_
} f5Zx:g
CfoSow-
} Ip( IGR"
S?*v p=
} -d6|D?}S
H |Z9]+h)7
SortUtil： t*82^KDU
#5N#^#r"
package org.rut.util.algorithm; .ev'd&l.
^$24231^
import org.rut.util.algorithm.support.BubbleSort; ' V;cA$ $
import org.rut.util.algorithm.support.HeapSort; H6x~mZu_:T
import org.rut.util.algorithm.support.ImprovedMergeSort; @X"p"3V
import org.rut.util.algorithm.support.ImprovedQuickSort; \QstcsEt
import org.rut.util.algorithm.support.InsertSort; l[l('-f
import org.rut.util.algorithm.support.MergeSort; SPeSe/
import org.rut.util.algorithm.support.QuickSort; 6YQ&+4
import org.rut.util.algorithm.support.SelectionSort; sE-E\+
import org.rut.util.algorithm.support.ShellSort; [(5;jUmF@
!t{3IE
/** ]k_@F6 A
* @author treeroot D&/(Avx.
* @since 2006-2-2 ^~0\d;l_
* @version 1.0 v1QE|@
*/ fnG&29x
public class SortUtil { I7nt<l!
public final static int INSERT = 1; \D<rT)Tl
public final static int BUBBLE = 2; ~a4htj
public final static int SELECTION = 3; sYiegX`1c
public final static int SHELL = 4; }?^5\otu
public final static int QUICK = 5; WsTbqR)W%
public final static int IMPROVED_QUICK = 6; ?7'uo$
public final static int MERGE = 7; d90B15]gv
public final static int IMPROVED_MERGE = 8; M&~3fRb4
public final static int HEAP = 9; Z[yQKy
OO]~\j
public static void sort(int[] data) { &p^S6h
sort(data, IMPROVED_QUICK); N't*eCi
} kz(%8qi8&
private static String[] name={ @U_w:Q<9u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kV(}45i]s
}; 9l@VxX68M
`)&-;CMY
private static Sort[] impl=new Sort[]{ ddmTMfH
new InsertSort(), <bWhTNOb
new BubbleSort(), Q_euNoA0
new SelectionSort(), vAbMU
new ShellSort(), =GTltFqI1
new QuickSort(), ;M{ @23?`
new ImprovedQuickSort(), :kfHILi
new MergeSort(), gXZ.je)NM
new ImprovedMergeSort(), bBc<yaN
new HeapSort() 0R>M_|
}; [iwn"e
[bIdhG
public static String toString(int algorithm){ M])Y|}wv8
return name[algorithm-1]; ((\s4-
} VJS|H!CH
~(aQ!!H6
public static void sort(int[] data, int algorithm) { suN{)"
impl[algorithm-1].sort(data); =LL5E}xP
} B t-o:)pa
AKC';J
public static interface Sort { O7I:Y85i#O
public void sort(int[] data); 0PIC|
} E9;cd$}K
p[VBeO^%
public static void swap(int[] data, int i, int j) { R)"Ds}1G
int temp = data; v9(->X'
data = data[j]; 4*g`!~)
data[j] = temp; Pdmfn8I]%
} :[m;#b
} rJ4O_a5/