[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; 19&<|qTz
} j.C`U(n}`
int i1=l; :9O#ObFR
int i2=mid+1; Uo-)pFN^
for(int cur=l;cur<=r;cur++){ 7R`M,u~f2^
if(i1==mid+1) ql<i]Y
data[cur]=temp[i2++]; M=%l}FSTw(
else if(i2>r) t0/p]=+.p/
data[cur]=temp[i1++]; Te.Y#lCT$
else if(temp[i1] data[cur]=temp[i1++]; UM!ENI|
else VbJiZw(aR
data[cur]=temp[i2++]; CUO+9X-<8
} EqyeJq .
} K-e9>fmB#
!Nu<xq@!
} ?p9VO.^5
fdxLAC
改进后的归并排序: 1QqYQafA
RS"H8P4W
package org.rut.util.algorithm.support; e>7]w,*|
u}>#Eb
import org.rut.util.algorithm.SortUtil; FYOD Upn
bBu,#Mc
/** +EFgE1w
* @author treeroot _wC3kAO
* @since 2006-2-2 ?Eg(Gu.J
* @version 1.0 (hTCK8HK
*/ x4g3rmp
public class ImprovedMergeSort implements SortUtil.Sort { NS9B[*"Jl
wHsYF`
private static final int THRESHOLD = 10; <:(6EKJAq}
dA-2%uJ
/* nIAx2dh?
* (non-Javadoc) iDN;m`a
* m$`RcwO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6Se?sHC>
*/ fXXr+Mor
public void sort(int[] data) { ji1viv
int[] temp=new int[data.length]; YsG%6&zEq
mergeSort(data,temp,0,data.length-1); Scp7X7{N
} /,1D)0
5j:0Yt
private void mergeSort(int[] data, int[] temp, int l, int r) { -#0qV:D
int i, j, k; tna .52*/
int mid = (l + r) / 2; ]p*l%(dhY
if (l == r) V\6=ySx
return; T#M,~lD
if ((mid - l) >= THRESHOLD) rW0kA1=E
mergeSort(data, temp, l, mid); `kOD[*
else [r3!\HI7x
insertSort(data, l, mid - l + 1); -d8TD*^
if ((r - mid) > THRESHOLD) @_U;9)
mergeSort(data, temp, mid + 1, r); ,^?^dB
else |s)Rxq){"V
insertSort(data, mid + 1, r - mid); L>MLi3{
,RE\$~`w
for (i = l; i <= mid; i++) { yN~dU0.G6!
temp = data; B,M(@5wz
} UV5Ie!\nm
for (j = 1; j <= r - mid; j++) { 1lq(PGX)
temp[r - j + 1] = data[j + mid]; %F\?R[^5
} zBo1P(kek
int a = temp[l]; f_[<L
int b = temp[r]; q:l>O5
for (i = l, j = r, k = l; k <= r; k++) { L/wD7/ODr
if (a < b) { e@c0WlWa
data[k] = temp[i++]; \x)n>{3C
a = temp; M54j@_81pX
} else { H:!7:
data[k] = temp[j--]; 6726ac{xz
b = temp[j]; cS>e?
} q+P|l5_ t
} aT_&x@x
} 8S>&WR%jH]
([ jF4/
/** `n$I]_}/%
* @param data :/y1yM
* @param l 7+]=-
* @param i 9U{a{~b
*/ D-8O+.@
private void insertSort(int[] data, int start, int len) { %TX@I$Ba
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g$HwxA9Gp/
} .}'qUPNR
} &F\?
} Em?d*z
} }xBc0gr
}tsYJlh5
堆排序： "[vu6`m?
y|CP;:f;
package org.rut.util.algorithm.support; EPS={w$'s
W.z;B<
import org.rut.util.algorithm.SortUtil; lCAIK
yMyE s8
/** 7G.#O}).b
* @author treeroot *&?c(JU;<
* @since 2006-2-2 n,=VQOu
* @version 1.0 I([!]z
*/ k:JrHBKv\
public class HeapSort implements SortUtil.Sort{ k9$K}
Mzsfo;kk+
/* (non-Javadoc) =3q/F7-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mu?Eco`~
*/ )p T?/J
public void sort(int[] data) { rrQQZ5fhb
MaxHeap h=new MaxHeap(); 9UKp?SIF
h.init(data); 3BB%Z6F
for(int i=0;i h.remove(); D!.[q-<
System.arraycopy(h.queue,1,data,0,data.length); ()K " c#
} dlJbI}-v=
)_mr! z(S
private static class MaxHeap{ @Gx.q&H
1c<=A!"{
void init(int[] data){ Atflf2K
this.queue=new int[data.length+1]; /V8}eZ97
for(int i=0;i queue[++size]=data; \zieyE
fixUp(size); 8#(Q_
} V+Cwzc^j
} 7:9.&W/KE
L!=4N!j
private int size=0; _7IKzUn9g[
)N=NR2xBZ
private int[] queue; D<8HZ%o
AK\$i$@6
public int get() { +|bmT
return queue[1]; (7XCA,KTGI
} t<~$
D|rFu
public void remove() { dY@WI[yog
SortUtil.swap(queue,1,size--); a["2VY6Eq@
fixDown(1); &krwf ]|
} 43={Xy
file://fixdown rA2g&
private void fixDown(int k) { {.Z}5K
int j; bhkUKxd
while ((j = k << 1) <= size) { SG-'R1 J
if (j < size %26amp;%26amp; queue[j] j++; }:u~K;O87
if (queue[k]>queue[j]) file://不用交换 FL(6?8zK
break; (S xR`QP?,
SortUtil.swap(queue,j,k); Mu{;vf|j
k = j; Nc+,&R13m
} o4*+T8[|5
} 58%#DX34M
private void fixUp(int k) { S:TgFt0
while (k > 1) { S/Fkw4%
int j = k >> 1; (>`5z(X
if (queue[j]>queue[k]) `)GrwfC
break; 2Yp7
SortUtil.swap(queue,j,k); {]E+~%Va
k = j; e&>;*$)
} )K,F]fc+O
} H2 $GIY
%Eb%V($
} i/~1F_
Z9575CI<
} 7<%<Ff@^)O
U f|> (C
SortUtil： .C2TQ:B,.
h~(G$':^
package org.rut.util.algorithm; krsYog(^z
M7ers|&{
import org.rut.util.algorithm.support.BubbleSort; 0PU8#2pR
import org.rut.util.algorithm.support.HeapSort; UlAzJO6"
import org.rut.util.algorithm.support.ImprovedMergeSort; qZ}P*+`Q
import org.rut.util.algorithm.support.ImprovedQuickSort; deM7fN4lTi
import org.rut.util.algorithm.support.InsertSort; aYuD>rD
import org.rut.util.algorithm.support.MergeSort; %z#f.Ql
import org.rut.util.algorithm.support.QuickSort; oqLfesV~
import org.rut.util.algorithm.support.SelectionSort; -RS7h
import org.rut.util.algorithm.support.ShellSort; OCZ[D{i9@
x9x E&
/** 87:!C5e}
* @author treeroot 5B&;uY
* @since 2006-2-2 C?i >.t
* @version 1.0 D\[h:8k
*/ v^zu:Z*
public class SortUtil { oP!;\a( SL
public final static int INSERT = 1; -O&CI)`;B
public final static int BUBBLE = 2; E2cB U{x
public final static int SELECTION = 3; oS7(s
public final static int SHELL = 4; \3'9Uz,OC
public final static int QUICK = 5; aX~%5mF
public final static int IMPROVED_QUICK = 6; AX= 1b,s
public final static int MERGE = 7; Wx~k&[&E
public final static int IMPROVED_MERGE = 8; <{2e#Y
public final static int HEAP = 9; !-N6l6N
X66VU
public static void sort(int[] data) { ]da^xWK
sort(data, IMPROVED_QUICK); INkD=tX
} ?Y:8eD"*
private static String[] name={ zN{K5<7o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \0mb 3Q'
}; c>/. ;p
~v'3"k6
private static Sort[] impl=new Sort[]{ 'v\L @"
new InsertSort(), 7zHh@ B:]
new BubbleSort(), jCrpL~tWT
new SelectionSort(), H|ER
new ShellSort(), srYJp^sC
new QuickSort(), ^bc;[x&N
new ImprovedQuickSort(), c%[#~;E
new MergeSort(), KN?6;G{
new ImprovedMergeSort(), ;zYqsS
new HeapSort() a)S+8uU
}; )13dn]o=2
DK=cVpN%s
public static String toString(int algorithm){ BCe|is0
return name[algorithm-1]; &Ch#-CUE/
} jL^](J>
UN%Vg:=
public static void sort(int[] data, int algorithm) { ^S)cjH`P
impl[algorithm-1].sort(data); Pt&(npjN,
} 4'6`Ll|iq
b8%C*r7
public static interface Sort { ^)?d6nI
public void sort(int[] data); #7ov#_2Jd
} jMbC Y07v
B9T!j]'
public static void swap(int[] data, int i, int j) { gj(l&F *@
int temp = data; t3kh]2t
data = data[j]; OjL"0imN6
data[j] = temp; [AK%~Kg9
} @ F"ShT0
} 7qdl,z