[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; #Mw|h^Wm
} \c3zK|^
int i1=l; xr+K: bw
int i2=mid+1; |E-/b6G
for(int cur=l;cur<=r;cur++){ }NW^?37
if(i1==mid+1) NH$%g\GPs
data[cur]=temp[i2++]; )kR~|Yn<-
else if(i2>r) /KjRB_5~q}
data[cur]=temp[i1++]; )QEvV:\
else if(temp[i1] data[cur]=temp[i1++]; h 92\1,
else n#t{3qzpD
data[cur]=temp[i2++]; [~9rp]<
} Og[NRd+
} jOj`S%7
,0%P3
} &M(=#pq9
l:mC'aR
改进后的归并排序: 90L,.
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package org.rut.util.algorithm.support; aKXaor@0f.
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import org.rut.util.algorithm.SortUtil; A]"$O&l
l{F^"_U
/** WV}<6r$e
* @author treeroot RpPbjz~
* @since 2006-2-2 ;cd{+0
* @version 1.0 Yn4c6K
*/ _Qg^>}]A1
public class ImprovedMergeSort implements SortUtil.Sort { \PU3{_G]
0&T0Ls#4
private static final int THRESHOLD = 10; LWE[]1=
nlJ~Q_E(
/* DqyJ]}|
* (non-Javadoc) )j(13faW|
* g3Q]W(F%$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X{zg-k(@
*/ //cj$}Rn!
public void sort(int[] data) { HKr")K%
int[] temp=new int[data.length]; "@U9'rKx
mergeSort(data,temp,0,data.length-1); yzr>]"o
} |3{DlZ2S
CAyV#7[0
private void mergeSort(int[] data, int[] temp, int l, int r) { EM]~yn!+
int i, j, k; 1| "s_m>g
int mid = (l + r) / 2; 7^,C=2
if (l == r) #A<|&#hh
return; Sp$~)f'
if ((mid - l) >= THRESHOLD) 834(kw+#9
mergeSort(data, temp, l, mid); yL/EIN
else IB:eyq-+
insertSort(data, l, mid - l + 1); XzI c<81Z
if ((r - mid) > THRESHOLD) rB|Mp!g%@
mergeSort(data, temp, mid + 1, r); meunAEe
else tz0@csXV
insertSort(data, mid + 1, r - mid); hgMh]4wN*
"]J4BZD
for (i = l; i <= mid; i++) { ^]c/hb|X
temp = data; Fgq"d7`9@
} Su`LBz"
for (j = 1; j <= r - mid; j++) { 1];rW`Bw
temp[r - j + 1] = data[j + mid]; fD+'{ivN4
} ^ZnlWZ@r
int a = temp[l]; vw=OGjT_>m
int b = temp[r]; {wMw$Fvf
for (i = l, j = r, k = l; k <= r; k++) { y;A<R[|Ve
if (a < b) { WmU4~.
data[k] = temp[i++]; pFi.?|6"
a = temp; & V:q}Q
} else { 1~:7W
data[k] = temp[j--]; (\m4o
b = temp[j]; xcdy/J&
} {[WEA^C~Q
} hZ|*=/3k
} eq.K77El{J
#g[jwl'
/** N),bhYS]
* @param data hR,VE'A
* @param l }Kc[pp|9<
* @param i a@`15O:
*/ f`'?2
private void insertSort(int[] data, int start, int len) { K=Z~$)Og)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3a PCi>i!_
} edld(/wu~
} *A C){M
} dr0<K[S_
} kbzzage6L
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堆排序： z=1 J{]
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package org.rut.util.algorithm.support; [tYly`F
taOD,}c|$
import org.rut.util.algorithm.SortUtil; *0zdI<Oe
*y[i~{7:
/** Jydz2 zt!
* @author treeroot )6U&^9=
* @since 2006-2-2 H.|v^e
* @version 1.0 `tA~"J$32l
*/ K];`
public class HeapSort implements SortUtil.Sort{ j`jF{k b
am.}2QZU
/* (non-Javadoc) #4S">u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z%cq%P8g
*/ O8:$sei$
public void sort(int[] data) { [kwVxaI
MaxHeap h=new MaxHeap(); ,!+>/RlJ
h.init(data); -w nlJi1f
for(int i=0;i h.remove(); <#AS[Q[N
System.arraycopy(h.queue,1,data,0,data.length); Q\>9PKK
} 2w)[1s[
)X-b|D4O
private static class MaxHeap{ g4USKJ19.
ut z.
void init(int[] data){ =" Q5Z6W
this.queue=new int[data.length+1]; lZoy(kdc
for(int i=0;i queue[++size]=data; \.h!'nfF
fixUp(size); Xv;} !z
} d`]|i:*q
} j3{8]D
cU <T;1VQ
private int size=0; 0'u2xe
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private int[] queue; 9sYN7x
xo{3r\u?}
public int get() { USF&;M3
return queue[1]; [1{#a {4
} MX!t/&X(n
gP=(2EVE
public void remove() { mFCDwh]
SortUtil.swap(queue,1,size--); fNb2>1
fixDown(1); heQ<%NIA"
} {pJ{UJKv?
file://fixdown ioxsx>e<
private void fixDown(int k) { gBM6{48GF
int j; RC(fhqV
while ((j = k << 1) <= size) { r;:5P%:
if (j < size %26amp;%26amp; queue[j] j++; !DsKa6Zj
if (queue[k]>queue[j]) file://不用交换 }^r=(
break; xb/L AlJ
SortUtil.swap(queue,j,k); E__^>=
k = j; s}Y_og_c
} 7hAFK
} #wz1uw[pI!
private void fixUp(int k) { YC!Tgb~H
while (k > 1) { lGHU{7j\
int j = k >> 1; Fy1@B(V%
if (queue[j]>queue[k]) i}SJ
break; Hkq""'Mx+w
SortUtil.swap(queue,j,k); ap|7./yg
k = j; Qw>ftle
} T=lir%q
} |+Gv)Rvp
bvHF;Qywg
} &k'J5YHm8H
>y&Db
} f-6hcd@Ca
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SortUtil： d+FS
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package org.rut.util.algorithm; z'cVq}vl
Glz)-hjJ:n
import org.rut.util.algorithm.support.BubbleSort; 'N1_:$z@(
import org.rut.util.algorithm.support.HeapSort; {#>>dILPr
import org.rut.util.algorithm.support.ImprovedMergeSort; +#qW 0g
import org.rut.util.algorithm.support.ImprovedQuickSort; 8@`"ZzM
import org.rut.util.algorithm.support.InsertSort; Z^t"!oY
import org.rut.util.algorithm.support.MergeSort; H/!_D f
import org.rut.util.algorithm.support.QuickSort; 8GpPyG ],e
import org.rut.util.algorithm.support.SelectionSort; N}`.N
import org.rut.util.algorithm.support.ShellSort; jys1Ki
s$g"6;_\
/** h<KE)^).
* @author treeroot U)IW6)q
* @since 2006-2-2 qRXQL"Pe_l
* @version 1.0 l :sZ
*/ Z}#,E;
public class SortUtil { Q-<,+[/
public final static int INSERT = 1; s)_Xj`Q#
public final static int BUBBLE = 2; V}?d ,.m`{
public final static int SELECTION = 3; )$18a
public final static int SHELL = 4; >T'=4n['
public final static int QUICK = 5; _`6fGu& W
public final static int IMPROVED_QUICK = 6; C.SGm
public final static int MERGE = 7; __x2xtrH
public final static int IMPROVED_MERGE = 8; q,b6).
public final static int HEAP = 9; dWR0tS6vR`
,E&PIbDL1
public static void sort(int[] data) { P'Q|0lB
sort(data, IMPROVED_QUICK); gFk~SJd
} `-)!4oJ]
private static String[] name={ l=(4o4um
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" y+3< ] N
}; B8Ob~?
}e}J6[wP
private static Sort[] impl=new Sort[]{ H(qDQqJHYy
new InsertSort(), W<Ms0
new BubbleSort(), 7:fC,2+
new SelectionSort(), H>8B$fi)$
new ShellSort(), 5xJyW`SWz
new QuickSort(), ` VL`8
new ImprovedQuickSort(), +eiM6* /0
new MergeSort(), ^[]GsF
new ImprovedMergeSort(), EL_rh TWw
new HeapSort() i <KWFF#
}; XXuIWIhm
dB{o-R
public static String toString(int algorithm){ pJM~'tlHV
return name[algorithm-1]; Tac7+=T
} JffjGf-o
lq2Ah=FuN
public static void sort(int[] data, int algorithm) { hrfu\cI
impl[algorithm-1].sort(data); /cn=8%!N
} z[kz[
sZ`C "1cX
public static interface Sort { @ 2r9JqR[=
public void sort(int[] data); j$%KKl8j
} Cx>iSx
:f^=~#!
public static void swap(int[] data, int i, int j) { 9f ,$JjX[
int temp = data; 2=H3yEJq
data = data[j]; H,r>@Y
data[j] = temp; f.?p"~!
} N?!]^jI,
} q,k/@@Qd9