[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&+&)d
} D dCcsYm,
int i1=l; *XYp~b
int i2=mid+1; Z( "-7_
for(int cur=l;cur<=r;cur++){ w8:
if(i1==mid+1) 5:5d=7WX
data[cur]=temp[i2++]; ^ uwth
else if(i2>r) <Ter\o5%
data[cur]=temp[i1++]; <9:~u]ixt
else if(temp[i1] data[cur]=temp[i1++]; 9d( M%F
else (J%>{?"ij
data[cur]=temp[i2++]; 6hcK%0z
} Ro `Xs.X
} =1VZcLNt
rQ2TPX<?a
} !mB `FC
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改进后的归并排序: lF40n4}
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package org.rut.util.algorithm.support; F~7TE91C
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import org.rut.util.algorithm.SortUtil; AGO"),
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/** :>_oOn[_
* @author treeroot Y%|dM/a`
* @since 2006-2-2 [7LdTY"Tl
* @version 1.0 _2}~Vqb+
*/ &h!O<'*2
public class ImprovedMergeSort implements SortUtil.Sort { 4}UJBb?
F0r2=f(?
private static final int THRESHOLD = 10; Zw'050~-
agkKm?xIL
/* 7|_2@4-W6
* (non-Javadoc) Z#^|h0
* !;d>}iE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &#gh :5
*/ JR&yaOws
public void sort(int[] data) { 5v`lCu]
int[] temp=new int[data.length]; _V0%JE'
mergeSort(data,temp,0,data.length-1); D:z_FNN
} R?tjobk!
V\]j^$
private void mergeSort(int[] data, int[] temp, int l, int r) { 0_Elxc
int i, j, k; Xh3b=i|K
int mid = (l + r) / 2; D/;[x{;E
if (l == r) NpKyrXDJv
return; dD~H ft
if ((mid - l) >= THRESHOLD) WU@_aw[
mergeSort(data, temp, l, mid); c5 AaUza
else Q"c/]Sk)
insertSort(data, l, mid - l + 1); \i}-Y[Dg
if ((r - mid) > THRESHOLD) Aho*E9VW
mergeSort(data, temp, mid + 1, r); \DBEs02
else fOdqr
insertSort(data, mid + 1, r - mid); ^Pu:&:ki
$d4&H/u^
for (i = l; i <= mid; i++) { ^K_FGE0ec
temp = data; h;y}g/HZ
} Qe4 % A
for (j = 1; j <= r - mid; j++) { X%N!gy
temp[r - j + 1] = data[j + mid]; PBFpV8P,
} &5z9C=]e
int a = temp[l]; 6X?:mn'%QF
int b = temp[r]; ![fNlG!r
for (i = l, j = r, k = l; k <= r; k++) { #Ak|p#7 ^
if (a < b) { 1wdc4>
data[k] = temp[i++]; ' u;Zw%O(J
a = temp; qdmAkYUC
} else { :*DWL!a
data[k] = temp[j--]; FZZO-,xa
b = temp[j]; ~3Zz.!F
} q@;1{
} y65lbl%Zn
} h+&iWb3;
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/** Y|J=72!]
* @param data V8&'dhuG
* @param l Qb55q`'z
* @param i ~{-Ka>A
*/ ])%UZM6
private void insertSort(int[] data, int start, int len) { >}2 ,2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /lPnf7
} =PNkzFUo
} l?V#;
} #b:YY^{g_
} gu~R4@3
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堆排序： +xsGa{`
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package org.rut.util.algorithm.support; ocMTTVo
v0=v1G*rvJ
import org.rut.util.algorithm.SortUtil; c#1kg@q@
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/** suW|hh1/Ya
* @author treeroot )C{20_
* @since 2006-2-2 Am*lx
* @version 1.0 )R?uzX^qf
*/ >j$aY
public class HeapSort implements SortUtil.Sort{ ST~YO
@p}_"BHYWt
/* (non-Javadoc) %hw4IcWJ|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KIR3m )
*/ >&R@L KP
public void sort(int[] data) { 2Oyw#1tdn
MaxHeap h=new MaxHeap(); SDNRcSbOD6
h.init(data); XP:fL NpQ
for(int i=0;i h.remove(); _*8 6
System.arraycopy(h.queue,1,data,0,data.length); C!9mygI
} #w\x-i|
>9i>A:
private static class MaxHeap{ 7ncR2-{g
}LQV2 hKTG
void init(int[] data){ &)JoB
this.queue=new int[data.length+1]; \*qradgx$
for(int i=0;i queue[++size]=data; NjA[(8\:
fixUp(size); WS(m#WFQr
} f8=qnY2j
} d#$Pf=}
5L~lF8
private int size=0; 7+@-mJMP$D
&2[Xu4*
private int[] queue; L:mE)Xq2
N#)Klq87z
public int get() { 3O1Lv2)_
return queue[1]; 2EN}"Du]mj
} U:eX^LE7
<SOG?Lh~
public void remove() { ,{msJyacmR
SortUtil.swap(queue,1,size--); d)D!np=
fixDown(1); ,`!lZ| U
} 02tN=}Cj)
file://fixdown -aE,KQ
private void fixDown(int k) { bi+g=cS
int j; "rEfhzmyF
while ((j = k << 1) <= size) { jq8TfJ|
if (j < size %26amp;%26amp; queue[j] j++; 8fBhX,1
if (queue[k]>queue[j]) file://不用交换 #f_'&m
break; .d$Q5Qae
SortUtil.swap(queue,j,k); '@w'(}3!3R
k = j; f}4A,%:1
} =2DK?]K;
} BhbfPQ
private void fixUp(int k) { tlg}"lY
while (k > 1) { u2$.EM/iae
int j = k >> 1; uTPAf^|
if (queue[j]>queue[k]) .3n\~Sn
break; i O?f&u
SortUtil.swap(queue,j,k); `,/5skeJ
k = j; ?$tD
} qdKqc,R1{
} 3XQe? 2:<
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} %hZX XpuO
vdB2T2F
} i^Jw`eAmT
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SortUtil： PO0Od z
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package org.rut.util.algorithm; Mw-L?j0o[k
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import org.rut.util.algorithm.support.BubbleSort; M.Tp)ig\#
import org.rut.util.algorithm.support.HeapSort; DTo"{!
import org.rut.util.algorithm.support.ImprovedMergeSort; wL>*WLfR
import org.rut.util.algorithm.support.ImprovedQuickSort; #2:?N8vz*
import org.rut.util.algorithm.support.InsertSort; #Z `Tk)u/
import org.rut.util.algorithm.support.MergeSort; 5WxNH}{
import org.rut.util.algorithm.support.QuickSort; (a-Lx2T
import org.rut.util.algorithm.support.SelectionSort; qp#Euq6
import org.rut.util.algorithm.support.ShellSort; O0`ofFN
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/** 5rCJIl.
* @author treeroot n_LK8
* @since 2006-2-2 TvT>UBqj=
* @version 1.0 3B,dL|q(@J
*/ ~]?EV?T
public class SortUtil { KydAFxUb
public final static int INSERT = 1; 6@FhDj2X
public final static int BUBBLE = 2; On!+7is'
public final static int SELECTION = 3; K^tc]ZQ
public final static int SHELL = 4; kRbJK
public final static int QUICK = 5; *&_cp]3-WF
public final static int IMPROVED_QUICK = 6; 5=p<"*zJ
public final static int MERGE = 7; *3@8,~_tp
public final static int IMPROVED_MERGE = 8; O\Z!7UQ$
public final static int HEAP = 9; L>E{~yh
B^zg#x#8
public static void sort(int[] data) { Lyn{Uag
sort(data, IMPROVED_QUICK); ;~[}B v
} T<Qa`|5>
private static String[] name={ @]}/vsI m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" c'Ibgfx%m
}; H]wP\m)
T3SFG]H
private static Sort[] impl=new Sort[]{ f O+lD
new InsertSort(), ?Ov~\[) F
new BubbleSort(), T@#?{eA
new SelectionSort(), 8*{jxN'M
new ShellSort(), :)B1|1
new QuickSort(), }0@@_Y]CC
new ImprovedQuickSort(), s?->2gxhx
new MergeSort(), i1KjQ1\a+
new ImprovedMergeSort(), 8@S]P0lk
new HeapSort() 4tUt"N
}; n4 N6]W\5
#6[F&
public static String toString(int algorithm){ l7VTuVGUJ
return name[algorithm-1]; q{b-2k
} Lr6C@pI
c{?SFwgd
public static void sort(int[] data, int algorithm) { 2$!,$J-<Y
impl[algorithm-1].sort(data); es%py~m)
} }''0N1,/
3c wBPqH
public static interface Sort { #;@I.
public void sort(int[] data); a$^)~2U{
} Pw7uxN`
P,WQN[(+
public static void swap(int[] data, int i, int j) { /z`tI
int temp = data; \{~CO{II
data = data[j]; dvZlkMm
data[j] = temp; k2,`W2]^E
} ,mi7WW9
} Mk973'K'