[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; J$51z
} U5kKT.M
int i1=l; =dPokLXn
int i2=mid+1; +4-T_m/W/
for(int cur=l;cur<=r;cur++){ @e<(o UE
if(i1==mid+1) Qn8xe,
data[cur]=temp[i2++]; _CHzwNU
else if(i2>r) Y5tyFi#w[
data[cur]=temp[i1++]; e4` L8
else if(temp[i1] data[cur]=temp[i1++]; :m<&Ff}
else ^m%#1Zd
data[cur]=temp[i2++]; T^7Cv{[
} R1H^CJ=v0
} aG]>{(~cL
UiG/Rn
} 14 & KE3`
mi] WZlg$
改进后的归并排序: d#v@NuO6 h
jn5xYKv
package org.rut.util.algorithm.support; VVDN3
Fs~(>w@
import org.rut.util.algorithm.SortUtil; 1x|3|snz)
r+bGZ
/** }>hn
* @author treeroot ."+lij=56
* @since 2006-2-2 m'NAM%$}J
* @version 1.0 )bFl-
*/ es*$/A
public class ImprovedMergeSort implements SortUtil.Sort { n- 2X?<_Z
W q<t+E[
private static final int THRESHOLD = 10; nW)+-Wxq
w5 .^meU
/* w~u{"E$
* (non-Javadoc) 4Et(3[P71
* 'V7LL1K^>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !ekByD
*/ &DMC\R*j
public void sort(int[] data) { kxhsDD$@p
int[] temp=new int[data.length]; K[y")ooE<j
mergeSort(data,temp,0,data.length-1); {\(G^B*\
} M)ET1ZM
NwF"Zh5eMW
private void mergeSort(int[] data, int[] temp, int l, int r) { tLOGj?/r
int i, j, k; Qbv@}[f
int mid = (l + r) / 2; LWM<[8wJ4
if (l == r) y[XD=j
return; jOV6%
if ((mid - l) >= THRESHOLD) MZz9R*_VS
mergeSort(data, temp, l, mid); &|XgWZS5
else "IU}>y>J
insertSort(data, l, mid - l + 1); B!Wp=9)G
if ((r - mid) > THRESHOLD) Ixn|BCi60A
mergeSort(data, temp, mid + 1, r); %AO6=
else ^# $IoW
insertSort(data, mid + 1, r - mid); STnMBz7
TAUl{??,
for (i = l; i <= mid; i++) { iTinZ!Ut
temp = data; MUl`0H"tR
} J920A^)j!
for (j = 1; j <= r - mid; j++) { )(]rUJ~+~A
temp[r - j + 1] = data[j + mid]; %d+Fq=<
} Z@euO~e~
int a = temp[l]; >3/mV<g f
int b = temp[r]; wK2$hsque
for (i = l, j = r, k = l; k <= r; k++) { ^P9mJ:
if (a < b) { eA1g}ipm
data[k] = temp[i++]; Qp<*or@
a = temp; _9=87u0
} else { >l 0aME@-0
data[k] = temp[j--]; 1T#-1n%[k(
b = temp[j]; zCJ"O9G<V
} gqv+|:#
} 4vL\t uoz
} }`L;.9
1#N`elm
/** p^Ey6,!8]D
* @param data h~Ir=JV
* @param l Ct `)R
* @param i F2zo !a8
*/ 5{yg
private void insertSort(int[] data, int start, int len) { B-LV/WJ_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C5(XZscq
} eM!Oc$C8[
} L<dh\5#p9Y
} 9 5!xJdq
} JPTLh{/
jkl dr@t
堆排序： C)m@/w
Lf9s'o}.R
package org.rut.util.algorithm.support; M+")*Opq
Srw`vql{(
import org.rut.util.algorithm.SortUtil; GdC=>\]
]iTP5~8U
/** fUvXb>f,
* @author treeroot yE N3/-S+
* @since 2006-2-2 *As"U99(
* @version 1.0 -5e8m4*
*/ R}(Rv3>Xx
public class HeapSort implements SortUtil.Sort{ v"2A?
Y|mtQE?c
/* (non-Javadoc) \=RV?mI3?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0Bgj.?l
*/ [6K[P3UZx
public void sort(int[] data) { x%)oL:ue
MaxHeap h=new MaxHeap(); M%jR`qVFg.
h.init(data); }cUO+)!Y
for(int i=0;i h.remove(); @ebY_*
System.arraycopy(h.queue,1,data,0,data.length); _$A?
} ;]R5:LbXS
CNV^,`FX
private static class MaxHeap{ , MqoX-+
xGOmvn^lQ
void init(int[] data){ YpZuAJm<2_
this.queue=new int[data.length+1]; 9Pvv6WyKy
for(int i=0;i queue[++size]=data; Jl\U~i
fixUp(size); NHU5JSlB
} !`H!!Kg0L
} [fwk[qFa
guCCu2OTA%
private int size=0; ?Z!R
BC#`S&R
private int[] queue; yz>S($u
\u6.*w5TI
public int get() { <2O#!bX1
return queue[1]; ',Z]w;D!G
} `o{_+Li9
wKcuIc$
public void remove() { ?]*"S{Cqv
SortUtil.swap(queue,1,size--); .LM|@OeaD!
fixDown(1); \ %xku:
} mDt!b6N/
file://fixdown /ZL6gRRA|
private void fixDown(int k) { 4K~>
int j; 2.{zfr
while ((j = k << 1) <= size) { ]T40VGJ:h
if (j < size %26amp;%26amp; queue[j] j++; y9T5
if (queue[k]>queue[j]) file://不用交换 h0x'QiCc
break; xqDz*V/mD
SortUtil.swap(queue,j,k); vEE\{1
k = j; M`iE'x
} r0OP !u
} jMX+uYx M
private void fixUp(int k) { ^IvQdVB
while (k > 1) { h`vT[u~l
int j = k >> 1; %<|<%~l&
if (queue[j]>queue[k]) [k%u$
break; 8B "^}y\0
SortUtil.swap(queue,j,k); sA+K?_
k = j; 0Bkc93
} oFzmH!&ED
} }0/l48G
vXM{)
} ^P.U_2&
sw:a(o&$
} ~XXNzz]?
j5smmtM`s
SortUtil： #N"QTD|i
,t*H: *
package org.rut.util.algorithm; ]XX>h~0
150x$~{/
import org.rut.util.algorithm.support.BubbleSort; zTq"kxn'
import org.rut.util.algorithm.support.HeapSort; K|D1
import org.rut.util.algorithm.support.ImprovedMergeSort; Y!ypG-
import org.rut.util.algorithm.support.ImprovedQuickSort; '!MKZKer
import org.rut.util.algorithm.support.InsertSort; #Hl?R5
import org.rut.util.algorithm.support.MergeSort; >C5u>@%9O
import org.rut.util.algorithm.support.QuickSort; VHLNJnA
import org.rut.util.algorithm.support.SelectionSort; kf95)iLo
import org.rut.util.algorithm.support.ShellSort; JPZH%#E(
|WT]s B0Eq
/** `0+-:sXZ6
* @author treeroot `O%O[
* @since 2006-2-2 jnM}N:v
* @version 1.0 iJKGzHvS
*/ g">^#^hBE
public class SortUtil { Vhe$vH
public final static int INSERT = 1; <1QXZfQ"
public final static int BUBBLE = 2; alsD TQ'
public final static int SELECTION = 3; 0<f.r~
public final static int SHELL = 4; HHs!6`R$0c
public final static int QUICK = 5; iG=Di)O
public final static int IMPROVED_QUICK = 6; 4#t-?5"
public final static int MERGE = 7; {([`[7B>a<
public final static int IMPROVED_MERGE = 8; >4+KEK
public final static int HEAP = 9; &xt GabNk
>V\^oh)t]t
public static void sort(int[] data) { i If?K%M7
sort(data, IMPROVED_QUICK); b0x%#trA{
} rrphOG
private static String[] name={ e3[Q6d&|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 80o'=E}"
}; =)w#?DGpj
);n/G
private static Sort[] impl=new Sort[]{ 3kwkU
new InsertSort(), Tv 5J
new BubbleSort(), P>`|.@
new SelectionSort(), 9E[==2TO
new ShellSort(), O*W<za;
new QuickSort(), |TR +Wn
new ImprovedQuickSort(), Y; to9Kv$
new MergeSort(), hp2$[p6O
new ImprovedMergeSort(), d..JW{
new HeapSort() ?|\wJrM ]
}; #ZP;] W
Jz P0D'
public static String toString(int algorithm){ [Q/kNK
return name[algorithm-1]; } .<(L
} VC%.u.< F
>6)|>#Wi
public static void sort(int[] data, int algorithm) { f"zmNG'
impl[algorithm-1].sort(data); "{Y6.)x
} <vD(,||
%hdjQIH
public static interface Sort { :)&vf<JL
public void sort(int[] data); hr hj4
} ~03MH'
1xh7KBr,
public static void swap(int[] data, int i, int j) { eg1F[~YL/
int temp = data; .*.eY?,V
data = data[j]; h ^s8LE3
data[j] = temp; _-9cGm v
} t*u#4I1
} SQ/HZ