[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; x *a_43`
} 11%Zx3
int i1=l; K j~!E H"
int i2=mid+1; }l&y8,[:
for(int cur=l;cur<=r;cur++){ >DAi-`e
if(i1==mid+1) ]GDjR'[z
data[cur]=temp[i2++]; s@p:XO
else if(i2>r) {I/t3.R`
data[cur]=temp[i1++]; Rm}G4Pq
else if(temp[i1] data[cur]=temp[i1++]; ;(rK^*`fO
else Lb?0<
data[cur]=temp[i2++]; I%{ 1K+V/
} LfJMSscfv
} >`<qa!9
o7^0Lo5Z?
} .LGA0
xyHv7u%*
改进后的归并排序: z'*{V\
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package org.rut.util.algorithm.support; bc;?O`I<
U?ZWDr"*`w
import org.rut.util.algorithm.SortUtil; E)|Bl>
fOdX2{7m
/** !b$]D?=}
* @author treeroot I|Mw*2U
* @since 2006-2-2 &x$ps
* @version 1.0 ZH`(n5
*/ ^O}J',Fm%f
public class ImprovedMergeSort implements SortUtil.Sort { 4wWfaL5"
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private static final int THRESHOLD = 10; 4>/i,_&K K
xZ(d*/6E
/* 4%4Yqx )
* (non-Javadoc) ^V7)V)Z;0
* |pBvy1e4)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t^2$ent
*/ >Bu_NoM
public void sort(int[] data) { wxN&k$`a
int[] temp=new int[data.length]; S4rm K&
mergeSort(data,temp,0,data.length-1); NN5G '|i
} 0Hx'C^m72
],{M``]q
private void mergeSort(int[] data, int[] temp, int l, int r) { 24sQon
int i, j, k; w_DaldK*
int mid = (l + r) / 2; s<oT,SPt
if (l == r) PS0/Ok
return; %/BBl$~ji
if ((mid - l) >= THRESHOLD) 221}xhn5
mergeSort(data, temp, l, mid); b;nqhO[f}
else P76gJ@#m
insertSort(data, l, mid - l + 1); <sX_hIA^Fx
if ((r - mid) > THRESHOLD) deJ/3\t
mergeSort(data, temp, mid + 1, r); I:0dz:T7*
else Gyrc~m[$
insertSort(data, mid + 1, r - mid); PR*EyM[T
9< S
for (i = l; i <= mid; i++) { u$X =2u:P
temp = data; I}m>t}QRI_
} YN~1.!F
for (j = 1; j <= r - mid; j++) { uJ8FzS>[V
temp[r - j + 1] = data[j + mid]; 1^ iLs
} (j(9'DjP
int a = temp[l]; 1~j,A[&|<
int b = temp[r]; 0#ON}l)>
for (i = l, j = r, k = l; k <= r; k++) { J(A+mYr{:
if (a < b) { KFy|,@NI
data[k] = temp[i++]; 5kADvi.
a = temp; 5DO}&%.xt
} else { Vy^mEsQC+h
data[k] = temp[j--]; @1U6sQ
b = temp[j]; [z6P]eC7
} :Zo^Uc:*w
} M:L-j{?y_
} # %'%LY=
RRzLQ7J
/** t~.^92]s|
* @param data ad9u;uS
* @param l =LEzcq>XO
* @param i eLbh1L
*/ a&dP@)
private void insertSort(int[] data, int start, int len) { r{_1M>F D!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >GzH_]
} T'9M
} !1@oZ(
} c(Fo-4K
} lE!.$L*k
:9(w~bB9$
堆排序： _@VKWU$$
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package org.rut.util.algorithm.support; db}lN
&vIj(e9Y
import org.rut.util.algorithm.SortUtil; >5zD0!bA
ABL5T-*]
/** 7M_GGjP
* @author treeroot F!2VTPm9z
* @since 2006-2-2 YG)7+94
* @version 1.0 ,u!_mV
*/ W)Y:2P<.
public class HeapSort implements SortUtil.Sort{ uC6e2py<[
lE*.9T
/* (non-Javadoc) Ih;D-^RQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KXUJ*l-5
*/ ju4wU;Nu
public void sort(int[] data) { {UF|-VaG
MaxHeap h=new MaxHeap(); RB;2
h.init(data); 75A60Uw
for(int i=0;i h.remove(); :5jorVu
System.arraycopy(h.queue,1,data,0,data.length); 23opaX5V=
} @V@<j)3P
6;Mv)|FJF
private static class MaxHeap{ 3E>]6
[|YJg]i-
void init(int[] data){ 7t78=wpLc
this.queue=new int[data.length+1]; !\5)!B
for(int i=0;i queue[++size]=data; 'b+ Tio
fixUp(size); `8TL*.9
} E~8J<gE
} z5sKV7&\[n
u/wWD@,
private int size=0; Jq+@%#G
=,08D^xY
private int[] queue; 6+C]rEY/o
db3.X~Cn#s
public int get() { 'lgS)m
return queue[1]; W;U<,g '
} N'|9rB2e
g%D.sc)69
public void remove() { 0 4oMgH>Vd
SortUtil.swap(queue,1,size--); 5p/.( |b,
fixDown(1); 5z" X>!?^
} ^Nysx ~6
file://fixdown "tj]mij2)G
private void fixDown(int k) { [.;8GMW
int j; clM6R
while ((j = k << 1) <= size) { [kPl7[OL
if (j < size %26amp;%26amp; queue[j] j++; h9~oS/%:
if (queue[k]>queue[j]) file://不用交换 ;:bnLSPo
break; $us7fuKE
SortUtil.swap(queue,j,k); C.se/\PE
k = j; mk6>}z*
} <u
} lO}I>yo}\
private void fixUp(int k) { |8{\j*3
while (k > 1) { 2,.8oa(
int j = k >> 1; 8Z 0@-8vi
if (queue[j]>queue[k]) )1O|+m k
break; 8{Vt8>4
SortUtil.swap(queue,j,k); 9v7}[`^
k = j; >-(,BfZ
} 2F ~SH
} ,rhNXx
%B| Ca&
} <S0gIg`)
NF7+Gp6?q
} )xTu|V
5L\Im^
SortUtil： @X_)%Y-^O
e^hI[LbNC
package org.rut.util.algorithm; I3Ad+]v
y"zZ9HQM
import org.rut.util.algorithm.support.BubbleSort; mf2Qu
import org.rut.util.algorithm.support.HeapSort; cn'rBY
import org.rut.util.algorithm.support.ImprovedMergeSort; XZ/cREz^s
import org.rut.util.algorithm.support.ImprovedQuickSort; ^5-SL?E
import org.rut.util.algorithm.support.InsertSort; /)r[}C0
import org.rut.util.algorithm.support.MergeSort; Ul:M=8nE%
import org.rut.util.algorithm.support.QuickSort; &VVvZ@X;
import org.rut.util.algorithm.support.SelectionSort; [kI[qByf
import org.rut.util.algorithm.support.ShellSort; ,4(m.P10
WX$AOnEv
/** ?nf4K/IjZ!
* @author treeroot }/7rA)_
* @since 2006-2-2 KoFWI_(b
* @version 1.0 YRj"]= 5N
*/ Wix4se1Ac
public class SortUtil { @EH@_EwYV
public final static int INSERT = 1; 85+w\KuEY
public final static int BUBBLE = 2; D]K?ntS[*
public final static int SELECTION = 3; |1/?>=dDm
public final static int SHELL = 4; :A,7D(H|
public final static int QUICK = 5; I&5cUj{GX-
public final static int IMPROVED_QUICK = 6; :n oZ p:a
public final static int MERGE = 7; =Unu>p}2V
public final static int IMPROVED_MERGE = 8; _147d5
public final static int HEAP = 9; CW~c<,"
j8ac8J,}c
public static void sort(int[] data) { uecjR8\e
sort(data, IMPROVED_QUICK); Z'c9xvy5
} @u8kNXT;h
private static String[] name={ %v]-:5g'|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [Y6ZcO/-i
}; gy/bA
IZZ $p{
private static Sort[] impl=new Sort[]{ kyUG+M
new InsertSort(), 7nbaR~ZV
new BubbleSort(), e:6mz\J
new SelectionSort(), lq)[
new ShellSort(), !GoHCe[10
new QuickSort(), CrX1qyR
new ImprovedQuickSort(), qkq^oHI
new MergeSort(), <;dFiI-GO#
new ImprovedMergeSort(), Kj|\ALI':
new HeapSort() *YTv"
}; Qy) -gax:,
:tLMh08h
public static String toString(int algorithm){ e`%<D[-
return name[algorithm-1]; ZZW%6-B
} hj3wxH.}
Bv}nG|
public static void sort(int[] data, int algorithm) { <&}N[
impl[algorithm-1].sort(data); 0JLQ.%_
} +kOXa^K
)'`@rq!
public static interface Sort { FX/f0C3CK
public void sort(int[] data); Qr[".>+
} ]DI%7kw'
;vgaFc]
public static void swap(int[] data, int i, int j) { \B8[UZA.&
int temp = data; 2!}rHw
data = data[j]; .IORvP-M&
data[j] = temp; f_> lz
} c)17[9"
} f`p"uLNo<