[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; ?d-(M' v.
} %@'9<i8o
int i1=l; o^wj_#ai$
int i2=mid+1; lY[>}L*H8
for(int cur=l;cur<=r;cur++){ yL^1s\<ddW
if(i1==mid+1) 0|9(oP/:
data[cur]=temp[i2++]; ELeR5xT
else if(i2>r) M.1R]x(|
data[cur]=temp[i1++]; -N(y+~wN
else if(temp[i1] data[cur]=temp[i1++]; {dhuvB
else '\H{Y[
data[cur]=temp[i2++]; 6C9KT;6
} Z%\9y]zs
} dt{|bQLu3
<~!7?ak
} Pk T&zSQA
W%hdS<b
改进后的归并排序: RX4O1Z0
)/PvaL
package org.rut.util.algorithm.support; ^ ]SS\=7
D"j =|4S#
import org.rut.util.algorithm.SortUtil; &_HSrU
#!u P>/
/** G5egyP;
* @author treeroot BoG/Hd.S
* @since 2006-2-2 Mcj4GjV6:"
* @version 1.0 b[$%Wg
*/ wxB?}
public class ImprovedMergeSort implements SortUtil.Sort { {g@Wd2-J}
E&}r"rbI
private static final int THRESHOLD = 10; ?/9]"HFHN
[4]lAxrRF
/* d{0b*l%
* (non-Javadoc) Kg=TPNf"$
* .*:SZ3v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f/H rO6~k%
*/ ?`_US7.@
public void sort(int[] data) { X ~%I(?OX
int[] temp=new int[data.length]; @y[Zr6\z
mergeSort(data,temp,0,data.length-1); Yr-a8aSTE5
} @xH|(
LN ]ks)
private void mergeSort(int[] data, int[] temp, int l, int r) { +2O('}t
int i, j, k; m<IPi <
int mid = (l + r) / 2; l<<0:~+q
if (l == r) QbP W_)N
return; w-FZ`OA`D
if ((mid - l) >= THRESHOLD) 9*GwW&M%1_
mergeSort(data, temp, l, mid); B]ul~FX
else H"WkZX
insertSort(data, l, mid - l + 1); fc._*y#AS
if ((r - mid) > THRESHOLD) #`RYKQwB
mergeSort(data, temp, mid + 1, r); D{Y~kV|
else w5gN8ZF3
insertSort(data, mid + 1, r - mid); 6%H8Qv
,w; ~R4x
for (i = l; i <= mid; i++) { VQU[5C
temp = data; C6,GgDH`
} L~x3}o$-o
for (j = 1; j <= r - mid; j++) { h>sz@\{
temp[r - j + 1] = data[j + mid]; OYzt>hdH
} #B8`qFpQC
int a = temp[l]; }oigZI(1
int b = temp[r]; !;{@O`j?b
for (i = l, j = r, k = l; k <= r; k++) { GRCc<TM,U
if (a < b) { }X$vriW
data[k] = temp[i++]; *_`T*$
a = temp; v:B_%-GfOA
} else { Wg[?i C*~
data[k] = temp[j--]; g9}u6q
b = temp[j]; Y'i0=w6G
} V2g,JFp&
} .3?'+KZ,
} +L;[-]E8
D%(9ot{!e
/** ^c83_93)R
* @param data bxyEn'vNvQ
* @param l zwR@^ 5^6
* @param i Wv_5sPqLW
*/ 7J~6J.m
private void insertSort(int[] data, int start, int len) { hE\,4c1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); oo)P(_"u
} -}%'I]R=
} R"6Gm67t
} Kv:UQdnU[
} #i-!:6sLA
m?'5*\(ST
堆排序： bR?-B>EB
)b m|],'
package org.rut.util.algorithm.support; uYIw ?fXy
1)/B V{n
import org.rut.util.algorithm.SortUtil; b5Rjn1@
$Rv}L'L
/** ?Pw#!t
* @author treeroot V[wEn9
* @since 2006-2-2 H1| -f]!
* @version 1.0 jz't!wj
*/ jec03wH_0
public class HeapSort implements SortUtil.Sort{ k^Tu9}[W1
qnW5I_]
/* (non-Javadoc) %=/Y~ml?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iN*d84KTP
*/ |.=Ee+HZ
public void sort(int[] data) { vF;6Y(h>
MaxHeap h=new MaxHeap(); -le:0NUwI
h.init(data); Bh:AY@k
for(int i=0;i h.remove(); (6u<w#u
System.arraycopy(h.queue,1,data,0,data.length); v!t*Ng
} |o~FKy1'z\
Vyj>&"28
private static class MaxHeap{ 1]A%lud4
$Bz|[=
void init(int[] data){ JnhHV(H
this.queue=new int[data.length+1]; o%h\55S
for(int i=0;i queue[++size]=data; 4en&EWUr
fixUp(size); UL;d H
} @_Aqk{3
} ^4Tr @g#]"
}CsUZ&*&
private int size=0; tH5f;mY,
\@pl:Os
private int[] queue; 00U8<~u
Xa*52Q`_
public int get() { T=VVK6Lc:
return queue[1]; 'gUHy1p
} vnk"0d.
p!' "hx
public void remove() { I-kM~q_
SortUtil.swap(queue,1,size--); U'";
fixDown(1); 6TfL|W<
} X^_,`H@
file://fixdown 1k2Ck
private void fixDown(int k) { vH# US
int j; "M7ry9dDH
while ((j = k << 1) <= size) { Lr)h>j6\
if (j < size %26amp;%26amp; queue[j] j++; L]9!-E
if (queue[k]>queue[j]) file://不用交换 m4E 6L
break; hrZ~7 0r
SortUtil.swap(queue,j,k); <$UMMA
k = j; b$PNZC8f
} Y4@~NCU/
} F5:*;E;$
private void fixUp(int k) { :J(a;/~ip
while (k > 1) { U(W#H|
int j = k >> 1; J2aA"BhdC"
if (queue[j]>queue[k]) n.$<D[@
break; )K@ 20Q+0K
SortUtil.swap(queue,j,k); GJ%It.
k = j; RK'3b/T
} m oFK/5cJ
} 5PKv@Mk
=_%:9FnQ0
} wIxLr{
K_]LK
} rM[Ps=5
*Ei~2O}
SortUtil： |YZ`CN<
k49CS*I
package org.rut.util.algorithm; X%`8h_
s<:"rw`
import org.rut.util.algorithm.support.BubbleSort; SnQ$
import org.rut.util.algorithm.support.HeapSort; jt3s;U*
import org.rut.util.algorithm.support.ImprovedMergeSort; AKa{C f
import org.rut.util.algorithm.support.ImprovedQuickSort; }y=7r!{@
import org.rut.util.algorithm.support.InsertSort; L4Nk+R;
import org.rut.util.algorithm.support.MergeSort; C9gF2ii|?
import org.rut.util.algorithm.support.QuickSort; +]uy
import org.rut.util.algorithm.support.SelectionSort; 1)u=&t,
import org.rut.util.algorithm.support.ShellSort; {:6VJ0s\
V}8J&(\
/** >/e#Z h
* @author treeroot ]lz,?izMR
* @since 2006-2-2 >:OOuf#
* @version 1.0 YI%7#L7C
*/ Oq+C<}eg
public class SortUtil { N_C\L2
public final static int INSERT = 1; \hi{r@k>}
public final static int BUBBLE = 2; p@cPm8L3
public final static int SELECTION = 3; M_9|YjwS
public final static int SHELL = 4; Kwh3SU=L}
public final static int QUICK = 5; (5km]`7z
public final static int IMPROVED_QUICK = 6; G92=b*x/
public final static int MERGE = 7; Aba6/
public final static int IMPROVED_MERGE = 8; XHN?pVZ7
public final static int HEAP = 9; R#1m_6I
Hd;>k$B
public static void sort(int[] data) { ? ~_%I
sort(data, IMPROVED_QUICK); c?q#?K aF
} NNe'5q9
private static String[] name={ z W+wtYV4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,0-
}; 4RTEXoXs
YnJ=&21
private static Sort[] impl=new Sort[]{ ?_HTOOa
new InsertSort(), !o*oT}6n
new BubbleSort(), j:<E=[Kl
new SelectionSort(), i]Kq
new ShellSort(), [W^6=7EO
new QuickSort(), -(:BkA
new ImprovedQuickSort(), K<s\:$VVh
new MergeSort(), ?:U6MjlQ"{
new ImprovedMergeSort(), oWXvkDN
new HeapSort() v+Mt/8
}; :FxZdE
:M=!MgD3w
public static String toString(int algorithm){ `uzRHbJ`
return name[algorithm-1]; kx'6FkZPIr
} )K5~r>n&
Gc@ENE f
public static void sort(int[] data, int algorithm) { dZnq 96<:|
impl[algorithm-1].sort(data); N.&)22<m9
} uX.Aq@j
{Ziq~{W_
public static interface Sort { X^aujK^@
public void sort(int[] data); QF%@MK0zC
} &mY<e4
_II;$_N
public static void swap(int[] data, int i, int j) { f, ;sEV
int temp = data; =q6yb@
data = data[j]; |W#^L`!G
data[j] = temp; {?5EOp~
} BJW;A>@Pj
} T \0e8"iZ