[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; f0mH|tI`
} +ptF-
int i1=l; $XQ;~i
int i2=mid+1; q:-]d0B+
for(int cur=l;cur<=r;cur++){ lq\'
if(i1==mid+1) F'UguC">
data[cur]=temp[i2++]; Dmm r]~
else if(i2>r) fs3-rXoB
data[cur]=temp[i1++]; CVGOX z
else if(temp[i1] data[cur]=temp[i1++]; (|36!-(iK
else X6Nm!od'
data[cur]=temp[i2++]; 5<)gCHa
} 43u PH1 )
} -l40)^ E}
dp UdFuU"
} LA;V}%y?
~^%0V<*-}
改进后的归并排序: K?FX<PT
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package org.rut.util.algorithm.support; 5&-j{J0iV
T[4[/n>i
import org.rut.util.algorithm.SortUtil; =!g/2;-or
ph8Jn+|E
/** |>IUtUg\
* @author treeroot 0?6If+AC
* @since 2006-2-2 :?$Sb8OuIL
* @version 1.0 ){:q;E]^fB
*/ 47C(\\
public class ImprovedMergeSort implements SortUtil.Sort { 0V>ESyae5
X@bn??
private static final int THRESHOLD = 10; QWzOp\+
r(,= uLc
/* da9*9yN
* (non-Javadoc) (pT(&/\8
* DYT@BiW{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yBPt%EF
*/ }rKJeOo^x?
public void sort(int[] data) { ,#P,B;r~
int[] temp=new int[data.length]; &Hlm{FHU
mergeSort(data,temp,0,data.length-1); 7z/(V\9B
} +(=0CA0GE
9zoT6QP4
private void mergeSort(int[] data, int[] temp, int l, int r) { z\Pe{J
int i, j, k; .# !'c
int mid = (l + r) / 2; Nl$gU3kL
if (l == r) hs!UX=x|
return; (c(-E|u.
if ((mid - l) >= THRESHOLD) &J lpA<^s;
mergeSort(data, temp, l, mid); J8GXI:y
else KrdZEi vb
insertSort(data, l, mid - l + 1); }@rg5$W
if ((r - mid) > THRESHOLD) QD.zU/F~>
mergeSort(data, temp, mid + 1, r); dN]Zs9]
else ?AeHVQ :C
insertSort(data, mid + 1, r - mid); >%uAQiU
:rz9M@7
for (i = l; i <= mid; i++) { 3~[`[4n^
temp = data; p@?7^nIR*u
} 3d,-3U
for (j = 1; j <= r - mid; j++) { <&qpl0U)Y
temp[r - j + 1] = data[j + mid]; laUu"cS
} 3bbp>7V!
int a = temp[l]; &Q-[;
int b = temp[r]; H Z;ZjC*
for (i = l, j = r, k = l; k <= r; k++) { w+Z--@\
if (a < b) { "*Lj8C3|n
data[k] = temp[i++]; 8 3z'#
a = temp; :X'*8,]KHH
} else { XKz;o^1a^
data[k] = temp[j--]; )z2|"Lp
b = temp[j]; 5y1or
} .-SDo"K.h
} g ,/a6M
} D~G5]M,}$
]}mly`Fw
/** 'O.+6`&
* @param data :r1;}hIA9
* @param l U}tl_5%)
* @param i x4CtSGG85f
*/ *'UhlFed
private void insertSort(int[] data, int start, int len) { 0K=Qf69Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CCbkxHMf|!
} .dD9&n;#^
} B<|:K\MA
} .ocx(_3G
} XIr{U5$<6
2Pbe~[
堆排序： Q)x?B]b-
w{k1Y+1
package org.rut.util.algorithm.support; 1a7!4)\
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import org.rut.util.algorithm.SortUtil; Ni+3b
vVI6m{zYV
/** j2RRSz&9
* @author treeroot 38[)[{G)Hv
* @since 2006-2-2 cvZni#o2)
* @version 1.0 ?j1_ n,d
*/ a$w},= `E
public class HeapSort implements SortUtil.Sort{ VK@$JwdL
z=ML(1c=
/* (non-Javadoc) OJv}kwV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |BwRlE2CFO
*/ El~-M`Gf
public void sort(int[] data) { UH5w7M
MaxHeap h=new MaxHeap(); EoKC8/
h.init(data); ,/i_QgP
for(int i=0;i h.remove(); k/df(cs
System.arraycopy(h.queue,1,data,0,data.length); :=rA Yc3]
} FJO"|||Y'|
r8IX/ ,
private static class MaxHeap{ M-{*92y& |
}X=87ud
void init(int[] data){ w+q?T
this.queue=new int[data.length+1]; %oAL
for(int i=0;i queue[++size]=data; g(mxhD!k
fixUp(size); D`~JbKV5@^
} ~}h^38
} ~_'0]P\
Y.q>EUSH
private int size=0; o[o:A|n
7N>oY$&)
private int[] queue; \M7I&~V
{I`B[,*
public int get() { Xc\*9XV:
return queue[1]; *i`v~>
} UE^D2u
+AB6lv
public void remove() { rFhW^fP/
SortUtil.swap(queue,1,size--); 3AK(dC[ri
fixDown(1); 1<`9HCm
} w|=gSC-o
file://fixdown N6h1|_o
private void fixDown(int k) { 6MuWlCKF8
int j; +W6Hva.
while ((j = k << 1) <= size) { ,*7H|de7
if (j < size %26amp;%26amp; queue[j] j++; Am=wEu[b
if (queue[k]>queue[j]) file://不用交换 \@i=)dA
break; =K:(&6f<t
SortUtil.swap(queue,j,k); \ZS\i4
k = j; w TlGJ$D0
} 4RhR[
} +)gGs#2X
private void fixUp(int k) { Wdo#?@m
while (k > 1) { 8 4z6zFv?Q
int j = k >> 1; 3@G;'|z
if (queue[j]>queue[k]) +O'vj
break; {1~9vHAZ
SortUtil.swap(queue,j,k); rnu e(t
k = j; k_!+V`Ro#
} S."7+g7Ar
} I0DM=V>;
hm3jpWi8
} r=qLaPG
kBbl+1{H
} Uh.Sc:trA
9mQ#L<Ps
SortUtil： vXb:
$_)=8"Sn
package org.rut.util.algorithm; ,<sm,!^<r
{DT4mG5
import org.rut.util.algorithm.support.BubbleSort; eZNitGaU
import org.rut.util.algorithm.support.HeapSort; PRD_!VOW
import org.rut.util.algorithm.support.ImprovedMergeSort; |1"!kA
import org.rut.util.algorithm.support.ImprovedQuickSort; Vu[:A
import org.rut.util.algorithm.support.InsertSort; hY+R'9
import org.rut.util.algorithm.support.MergeSort; _9NVE|c;
import org.rut.util.algorithm.support.QuickSort; ET)>#zp+s
import org.rut.util.algorithm.support.SelectionSort; }kE87x'
import org.rut.util.algorithm.support.ShellSort; J='W+=N
0N{+y}/G
/** i&A%"lOI9
* @author treeroot Ib1e#M3
* @since 2006-2-2 O6iCZ
* @version 1.0 ~s#e,Kav"
*/ X2gz6|WJ
public class SortUtil { ^Gq5ig1rxy
public final static int INSERT = 1; snYr9O[E6
public final static int BUBBLE = 2; Q2eXK[?*
public final static int SELECTION = 3; kJkxx*:u
public final static int SHELL = 4; cn%2OP:L^
public final static int QUICK = 5; Sj)}qM-y#
public final static int IMPROVED_QUICK = 6; [Uli>/%JB
public final static int MERGE = 7; TFy7HX\Oq
public final static int IMPROVED_MERGE = 8; F6W}mMZH/N
public final static int HEAP = 9; Pd~MiyO;K
2zK"*7b?
public static void sort(int[] data) { &x0C4Kh
sort(data, IMPROVED_QUICK); f7J,&<<5w
} iITp**l
private static String[] name={ C0fmmI0z~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Qw?+!-7TN
}; w(BH247`
A62<]R)n
private static Sort[] impl=new Sort[]{ nJJs%@y
new InsertSort(), cXN _*%
new BubbleSort(), \&a.}t
new SelectionSort(), . uR M{Bs
new ShellSort(), m=TJDr-
new QuickSort(), g_w&"=.jBq
new ImprovedQuickSort(), 9cd8=][
new MergeSort(), K)S;:MLG=
new ImprovedMergeSort(), z856 nl
new HeapSort() >|3a 9S
}; 0@)%h&mD
frN3S
public static String toString(int algorithm){ Km3&N
return name[algorithm-1]; DA"}A`HfI
} @T&t.|`
-[R!O'N9
public static void sort(int[] data, int algorithm) { =MLf[
impl[algorithm-1].sort(data); Y-p<qL|_
} +y&d;0!
dB;3.<S=
public static interface Sort { "&lN\&:
public void sort(int[] data); Z0ReWrl;`
} ~ y;y(4<
jxw_*^w"
public static void swap(int[] data, int i, int j) { R8&|+ya
int temp = data; <y)E>Fl
data = data[j]; phP>3f.T
data[j] = temp; ip``v0Nf
} Yv)aAWEa
} +a|/l