[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; MSef2|"P#
} P1\:hh
int i1=l; g7>p,
int i2=mid+1; 8Xo`S<8VS
for(int cur=l;cur<=r;cur++){ FPg5!O%
if(i1==mid+1) :Ng4? +@r
data[cur]=temp[i2++]; ,ypD0Q
else if(i2>r) 4VPJv>^
data[cur]=temp[i1++]; 4JOw@/nE
else if(temp[i1] data[cur]=temp[i1++]; <OYy;s
else x{=@~c%eh
data[cur]=temp[i2++]; DM*GvBdR
} WziX1%0$n
} 49/j9#hr
/3]b!lFZZ
} u<}PcI.
ux8:
改进后的归并排序: HTpoYxn(
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package org.rut.util.algorithm.support; I $5*Puy#
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import org.rut.util.algorithm.SortUtil; vbol70
`#v(MK{9+V
/** EUVB>%P
* @author treeroot !21#NCw
* @since 2006-2-2 sg=mkkD!g
* @version 1.0 =%wwepz6
*/ fF~3"!1#\I
public class ImprovedMergeSort implements SortUtil.Sort { E~k_4z%M
;JNI$DR
private static final int THRESHOLD = 10; x{Gdr51%
w-[A"M]I
/* $ N7J:Q
* (non-Javadoc) >n`!S`)9{
* C^dnkuA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ow,4'f!d
*/ QH?}uX'x)G
public void sort(int[] data) { muD7+rn?&
int[] temp=new int[data.length]; Hcts^zm2u
mergeSort(data,temp,0,data.length-1); T~*L[*F0
} KINKq`Sx
i;'kQ
private void mergeSort(int[] data, int[] temp, int l, int r) { >Ei-Spy>Xl
int i, j, k; vai.w-}Z
int mid = (l + r) / 2; VaLx-RX
if (l == r) AX {~A:B
return; %`o3YR
if ((mid - l) >= THRESHOLD) k!%[W,*
mergeSort(data, temp, l, mid); h3Bs
else |fQl0hL
insertSort(data, l, mid - l + 1); G:n,u$2a<
if ((r - mid) > THRESHOLD) /^BaQeH?R
mergeSort(data, temp, mid + 1, r); 9PpPAF
else c(]NpH in
insertSort(data, mid + 1, r - mid); !W^b:qjJ
D$ >gAv
for (i = l; i <= mid; i++) { {95z\UE}
temp = data; hH=H/L_Z
} y093-
for (j = 1; j <= r - mid; j++) { a0s6G3J+9
temp[r - j + 1] = data[j + mid]; `2 vv8cg^
} U?%1:-#F
int a = temp[l]; K >-)O=$s
int b = temp[r]; M- f)\`I
for (i = l, j = r, k = l; k <= r; k++) { 0Q2P"1>KT/
if (a < b) { E0g` xf6c
data[k] = temp[i++]; _~^JRC[q
a = temp; jK#[r[q{
} else { ;bC163[
data[k] = temp[j--]; x{$~u2|
b = temp[j]; ,+iREh;
} L`fDc
} m' LRP:9v
} .x 1&
o0f{ePZ=
/** 3EM=6\#q
* @param data `ViFY
* @param l n+C,v.X
* @param i LLa72HW
*/ K):MT[/"
private void insertSort(int[] data, int start, int len) { SBj9sFZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hQm"K~SW=
} %:^|Q;xe
} b~M3j&
} b r"47i
} !,f#oCL
rUb`_W@
堆排序： NAy3Zd}
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package org.rut.util.algorithm.support; r9x.c7=O
:3,aR\
import org.rut.util.algorithm.SortUtil; 0a#2Lo
]cz*k/*0
/** U1+X!&OCp
* @author treeroot Bf&,ACOf
* @since 2006-2-2 WVP^C71
* @version 1.0 gC}r$ZB(
*/ oGK 1D
public class HeapSort implements SortUtil.Sort{ JN9 W:X.
7TTU&7l~
/* (non-Javadoc) CC(At.dd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ) o)k~6uT
*/ b*-g@S
public void sort(int[] data) { \2F$FRWo
MaxHeap h=new MaxHeap(); 6[-N})
h.init(data); s|Hrb_[;l
for(int i=0;i h.remove(); ews4qP
System.arraycopy(h.queue,1,data,0,data.length); 1gq(s2izy
} ^|z
4FmT.P
private static class MaxHeap{ (6xrs_ea
1LgzqRq
void init(int[] data){ ZfzUvN&!
this.queue=new int[data.length+1]; R:= %gl!
for(int i=0;i queue[++size]=data; g3p*OYf
fixUp(size); 1:3I G=
} <f l-P
} DPrFBy
[Rz9Di ;
private int size=0; ``~7z;E%@
-ejH%CT
private int[] queue; vgfLI}|5
=:T pH>f*
public int get() { "?I]h
return queue[1]; {X=gjQ9
} H_RVGAbU
QEl:>HG
public void remove() { )G7")I J/X
SortUtil.swap(queue,1,size--); 67Z.aaXD1
fixDown(1); %p5%Fs`sd
} mk)F3[ke
file://fixdown r!qr'Ht<
private void fixDown(int k) { Ig&=(Kmr
int j; Q:.q*I!D<4
while ((j = k << 1) <= size) { (lDbArqy
if (j < size %26amp;%26amp; queue[j] j++; 3SRz14/W_R
if (queue[k]>queue[j]) file://不用交换 &ukYTDM
break; &zl=}xeA
SortUtil.swap(queue,j,k); GqFDN],Wp
k = j; u$7od$&S
} pi>,>-Z
} t)Iu\bP
private void fixUp(int k) { '\I.P
while (k > 1) { p'lL2n$E
int j = k >> 1; ;&|MNN^
if (queue[j]>queue[k]) gZ!vRO<%
break; ;~&F}!pQ
SortUtil.swap(queue,j,k); K{]!hm,[3
k = j; LY}9$1G]
} [25[c><:w"
} }L.xt88
5ua`5Hb;
} (#Vkk]-p
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} kaSy 9Y{
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SortUtil： PZVh)6f"c
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package org.rut.util.algorithm; KrcL*j&^
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import org.rut.util.algorithm.support.BubbleSort; BDW%cs
import org.rut.util.algorithm.support.HeapSort; aCu 8 D!
import org.rut.util.algorithm.support.ImprovedMergeSort; [P5+}@t
import org.rut.util.algorithm.support.ImprovedQuickSort; 3I87|5V,Z
import org.rut.util.algorithm.support.InsertSort; N5>ioJj
import org.rut.util.algorithm.support.MergeSort; by 'P}
import org.rut.util.algorithm.support.QuickSort; 9oOr-9t3
import org.rut.util.algorithm.support.SelectionSort; _*d8:|qw
import org.rut.util.algorithm.support.ShellSort; o!q3+Pp;}
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/** hn:
* @author treeroot 7Y`/w$
* @since 2006-2-2 [LDV*79Z
* @version 1.0 sEpY&6*
*/ \'z&7;px
public class SortUtil { *v+xKy#M
public final static int INSERT = 1; lTl-<E;
public final static int BUBBLE = 2; tI2V)i!
public final static int SELECTION = 3; 7 &y'\
public final static int SHELL = 4; D6cqON0a.
public final static int QUICK = 5; [ML%u$-
public final static int IMPROVED_QUICK = 6; oBfh1/<<a
public final static int MERGE = 7; "bI'XaSv
public final static int IMPROVED_MERGE = 8; )%8;C]G;
public final static int HEAP = 9; c{YBCWA
Up:<NHJT
public static void sort(int[] data) { 2Zf}t
sort(data, IMPROVED_QUICK); G}!dm0s$
} ~Z74e>V%
private static String[] name={ c&!EsMsU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W4 v/,g>
}; <m;idfn
JmHEYPt0
private static Sort[] impl=new Sort[]{ (/x%zmY;/U
new InsertSort(), Ce:2Tw
new BubbleSort(), U^ bF}4m
new SelectionSort(), A 9I5
new ShellSort(), ZCdlTdY
new QuickSort(), i98>=y~
new ImprovedQuickSort(), y~,mIM$[@
new MergeSort(), >LvQ&fAo
new ImprovedMergeSort(), DG2CpR)S
new HeapSort() vuL;P"F4&
}; g^ @9SU
nnP]x [
public static String toString(int algorithm){ ^[]q/v'3m!
return name[algorithm-1]; `:=af[n
} [1OX:O|
rCOH*m&
public static void sort(int[] data, int algorithm) { 0)@7$Xhf
impl[algorithm-1].sort(data); }n!$)W*?
} azEN_oUV
\Y37wy4
public static interface Sort { |=R@nn
public void sort(int[] data); 1N8:,bpsT
} dvPK5+0W?
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public static void swap(int[] data, int i, int j) { @xKfqKoqg
int temp = data; ]+C;C
data = data[j]; XTzz/.T;Z
data[j] = temp; /z'fFl^6O
} *@2+$fgz
} 58TH|Rj+I