[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; PnWD}'0V
} WYIw5jzC
int i1=l; F|eu<^"$ H
int i2=mid+1; pG yRX_;
for(int cur=l;cur<=r;cur++){ +$pJ5+v
if(i1==mid+1) X-Ycz 5?
data[cur]=temp[i2++]; =I4.Gf"~f
else if(i2>r) \KM|f9-b
data[cur]=temp[i1++]; F-0UdV
else if(temp[i1] data[cur]=temp[i1++]; k$[{n'\@
else 'F_}xMU
data[cur]=temp[i2++]; }=@zj6AC
} T0|H9>M
} uEd,rEB>
jMU9{Si
} I-:`cON=G
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改进后的归并排序: d'zT:g
H?:Jq\Ba0
package org.rut.util.algorithm.support; -J$g(sikt
7kz-V.
import org.rut.util.algorithm.SortUtil; 960qvz!
Fj=NiZ=
/** :,F=w0O
* @author treeroot 31XU7A
* @since 2006-2-2 `SOhG?Zo
* @version 1.0 iHz[Zw^.s
*/ \C/z%Hf7-
public class ImprovedMergeSort implements SortUtil.Sort { FMS2.E
.hN3`>*V
private static final int THRESHOLD = 10; R;THA!
:kp0EiJ
/* Fk$@Yy+}e
* (non-Javadoc) G[6=u|(M
* eTZ`q_LfI1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D44I"TgqD
*/ jOl1_
public void sort(int[] data) { */U$sZQ)
int[] temp=new int[data.length]; V_]-`?S
mergeSort(data,temp,0,data.length-1); "jGe^+9uT
} %+8
@Z2/9K%1'
private void mergeSort(int[] data, int[] temp, int l, int r) { h544dNo&
int i, j, k; b-b;7a\N
int mid = (l + r) / 2; ^'Zh;WjI7
if (l == r) oZvG3_H4.
return; Ph\F'xROe
if ((mid - l) >= THRESHOLD) `w=!o.1
mergeSort(data, temp, l, mid); 4H9xO[iM
else 2o}8W7y
insertSort(data, l, mid - l + 1); R7t bxC
if ((r - mid) > THRESHOLD) Bcm=G""
mergeSort(data, temp, mid + 1, r); EEg O
else 8)`5P\
insertSort(data, mid + 1, r - mid); bgXc_>T6_y
|vN$"mp^a
for (i = l; i <= mid; i++) { %>]#vQ|
temp = data; c=<v.J@K
} Nuo<` 6mV@
for (j = 1; j <= r - mid; j++) { ~pwY6Q
temp[r - j + 1] = data[j + mid]; Cj=J;^vf
} 8Nv-/VQ/b
int a = temp[l]; ,XP@ pi
int b = temp[r]; m"1 ?
for (i = l, j = r, k = l; k <= r; k++) { -*5yY#fw}
if (a < b) { '4Y*-!9
data[k] = temp[i++]; ~M(pCSJ[
a = temp; dR?5$V(
} else { k.ww-nH
data[k] = temp[j--]; m R"9&wq
b = temp[j]; +0)5H>h
} J]_)gb'1BR
} *+# k{D,
} ]dQZ8yVK
!DCVoc]pV
/** U@MOvW)
* @param data fG^7@Jw:G
* @param l Oym]&SrbS
* @param i zh?xIpY
*/ ">0 /8]l
private void insertSort(int[] data, int start, int len) { qRWJ-T:!F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); r{c5dQ
} [)B@
} (u$!\fE-et
} 4_Tb)?L+:
} ">rsA&hN-
3" 8t)s
堆排序： iOE9FW|e
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package org.rut.util.algorithm.support; _q2`m
^!XU+e+:0
import org.rut.util.algorithm.SortUtil; w`2_6[,9
~r7DEy|+
/** )2
* @author treeroot 1KNkl,E
* @since 2006-2-2 jLpgWt`8)E
* @version 1.0 Z%(Df3~gmm
*/ BIwgl@t!>
public class HeapSort implements SortUtil.Sort{ :"h Pg]'
LD7? .
/* (non-Javadoc) OpbszSl"y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $u(M 4(}
*/ (Qw`%B
public void sort(int[] data) { Ej9/_0lt
MaxHeap h=new MaxHeap(); AiR%MD
h.init(data); IX > j8z[
for(int i=0;i h.remove(); 4C2>0O<^s
System.arraycopy(h.queue,1,data,0,data.length); 4IH0un
} ?et0W|^k
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private static class MaxHeap{ ^Hy)<P
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void init(int[] data){ {g23[$X]N
this.queue=new int[data.length+1]; kM}ic(K
for(int i=0;i queue[++size]=data; `:B
fixUp(size); PAO[Og,-
} ^+Y-=2u:
} K%.YNVHHC
h<!khWFS
private int size=0; -hJ>wGI
JXD?a.vy^q
private int[] queue; UH.}B3H
._F6-pl
public int get() { C$]%1<-Iv]
return queue[1]; !Sr0Im0
} .P0Qs&i
_sCJ3ZJ
public void remove() { DftGy:Ah3
SortUtil.swap(queue,1,size--); (Mire%$h
fixDown(1); 8 MACbLY
} 0ga1Yr]
file://fixdown HK,G8:T
private void fixDown(int k) { !xx> lX5
int j; W> -E.#!_
while ((j = k << 1) <= size) { s5Bmv\e.i5
if (j < size %26amp;%26amp; queue[j] j++; JWm^RQ
if (queue[k]>queue[j]) file://不用交换 Bafz&#;Q'
break; r&l*.C*
SortUtil.swap(queue,j,k); (w@MlMk
k = j; &j~|3
} gPhw.e""
} fG[3%e
private void fixUp(int k) { R4rm>zisVX
while (k > 1) { )DZ-vnZ#t0
int j = k >> 1; =='{[[J
if (queue[j]>queue[k]) bQ\-6dOtv
break; ?M{6U[?
SortUtil.swap(queue,j,k); O]r3?=
k = j; 0)]C&;}_M
} qzbkxQu]g
} qer'V
cTIwA:)D
} 6+f>XL#w
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} o:Os_NaD
m-KK {{
SortUtil： i,b7Ft:F&
/KvPiQ%
package org.rut.util.algorithm; u$@I/q,ou
"drh+oo.
import org.rut.util.algorithm.support.BubbleSort; 8JOht(m
import org.rut.util.algorithm.support.HeapSort; +(P43XO08
import org.rut.util.algorithm.support.ImprovedMergeSort; zam0(^=
import org.rut.util.algorithm.support.ImprovedQuickSort; Zow^bzy4
import org.rut.util.algorithm.support.InsertSort; f;XsShxr
import org.rut.util.algorithm.support.MergeSort; Rc.<0#
import org.rut.util.algorithm.support.QuickSort; {hq ;7
import org.rut.util.algorithm.support.SelectionSort; ~JRuMP
import org.rut.util.algorithm.support.ShellSort; l|tp0[
IEr`6|X
/** e]B<\i\T
* @author treeroot LY cSMuJ
* @since 2006-2-2 "91Atb;hJ
* @version 1.0 W]Y!ZfGnN
*/ LW 3J$Am
public class SortUtil { }(%}"%$
public final static int INSERT = 1; `L[32B9
public final static int BUBBLE = 2; -/7=\kao%
public final static int SELECTION = 3; h+u|MdOY\
public final static int SHELL = 4; ez:o9)N4
public final static int QUICK = 5; IV#My9}e
public final static int IMPROVED_QUICK = 6; ]}L1W`n
public final static int MERGE = 7; #V,~d&_k
public final static int IMPROVED_MERGE = 8; xjk|O;ak
public final static int HEAP = 9; e`2R{H
-V_S4|>
public static void sort(int[] data) { SR8Kzk{
sort(data, IMPROVED_QUICK); #2'&=?J1r
} N4(VRA
private static String[] name={ :yFCp@&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `lh?Z3W
}; K]*ERAfM%m
!J(,M)p!
private static Sort[] impl=new Sort[]{ LuQ M$/i
new InsertSort(), 2u H\8A+'f
new BubbleSort(), [_G0kiI}W"
new SelectionSort(), VP[!ji9P
new ShellSort(), 5$Q`P',*Ua
new QuickSort(), %c2i.E/G
new ImprovedQuickSort(), "/-v 9
new MergeSort(), x]+KO)I
new ImprovedMergeSort(), Y+yvv{01
new HeapSort() dQ~"b=
}; ]Tw6Fg1o>
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public static String toString(int algorithm){ g UAPjR
return name[algorithm-1]; qa`(,iN
} A-!qO|E[-
R$m?&1K
public static void sort(int[] data, int algorithm) { /,%o<Ql9
impl[algorithm-1].sort(data); 'n.9qxY;
} $=SYssg7La
^M5uLm-_s
public static interface Sort { "8TMAF|i4
public void sort(int[] data); a2_IF,p*?
} \~j(ui|
}'v?Qq
public static void swap(int[] data, int i, int j) { QD VA*6F
int temp = data; D)cwttH
data = data[j]; ZGvNEjff
data[j] = temp; V+5 n|L5
} x&b-Na3Xi
} '=Y~Ir+