[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; CO5?UgA
} 'DRyOJnr
int i1=l; &ATjDbW*(
int i2=mid+1; }g>&l.2X
for(int cur=l;cur<=r;cur++){ ]>*Z 1g;
if(i1==mid+1) =GFlaGD
data[cur]=temp[i2++]; |w:7).P
else if(i2>r) *hFT,1WE=+
data[cur]=temp[i1++]; vF1]L]z:?
else if(temp[i1] data[cur]=temp[i1++]; !mq+Oz~
else 7tit>dJ
data[cur]=temp[i2++]; HQv#\Xi1
} )jCAfdnCs
} `6Y'H2WJ?
"m/0>UU0
} 9dSKlB5J
+}X@{DB
改进后的归并排序: 80axsU^H0
M0"xDvQ
package org.rut.util.algorithm.support; pbloL3d.;+
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import org.rut.util.algorithm.SortUtil; fu\M2"e
A!goR-J]
/** '1/uf;OXIH
* @author treeroot NWb,$/7T
* @since 2006-2-2 GZ*cV3Y`&
* @version 1.0 Q6"r^wWx
*/ I9k o*f
public class ImprovedMergeSort implements SortUtil.Sort { b[$l{RQ[?
~H)bvN^
private static final int THRESHOLD = 10; NqlG=pu
DkQy.
/* :|N5fkhN
* (non-Javadoc) A4 o'EQ?~
* Ko2{[%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gnx!_H\h<
*/ vY}/CBmg
public void sort(int[] data) { uK3,V0 yz
int[] temp=new int[data.length]; =#n|t[h-
mergeSort(data,temp,0,data.length-1); A2*z
} G#3 O^,m
W}a&L
private void mergeSort(int[] data, int[] temp, int l, int r) { cFD(Ap
int i, j, k; PHZA?>Q7Z
int mid = (l + r) / 2; }3=]1jH6
if (l == r) ),dXaP[
return; R279=sO,J
if ((mid - l) >= THRESHOLD) d,+d8X
mergeSort(data, temp, l, mid); >g8Tl`P,iN
else VmV/~-<Z
insertSort(data, l, mid - l + 1); !W .ooy5(
if ((r - mid) > THRESHOLD) $WrDZU 2z
mergeSort(data, temp, mid + 1, r); h]vA%VuE'E
else r5tv9#4]
insertSort(data, mid + 1, r - mid); BWfsk/lej
D]Bvjh
for (i = l; i <= mid; i++) { /< h~d
temp = data; E3;[*ve
} Y2QlK1.8V
for (j = 1; j <= r - mid; j++) { [p[Kpunr{l
temp[r - j + 1] = data[j + mid]; rFdq \BSi
} wUW+S5"K
int a = temp[l]; \ec,=7S<Zf
int b = temp[r]; 7L? ~;;L$
for (i = l, j = r, k = l; k <= r; k++) { {b=]JPE
if (a < b) { g' H!%<
data[k] = temp[i++]; 8L6!CP_!
a = temp; %R-"5?eTtu
} else { iK= {pd
data[k] = temp[j--]; 3dQV5E.
b = temp[j]; $Rd74;edn
} *|a_(bQ4@
} -:AknQq
} P*)}ENY
^)D[ W(*
/** Et4gRS)\
* @param data >Vn;1|w
* @param l '@ (WT~g
* @param i \h,S1KmIBD
*/ /\_0daUx
private void insertSort(int[] data, int start, int len) { oCXBek?\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j#Bea ,
} 31Y+bxQ
} mJ)o-BV
} j%#n}H
} <p-R{}8
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堆排序： `N]!-=o
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package org.rut.util.algorithm.support; al(t-3`<
E[)`+:G]
import org.rut.util.algorithm.SortUtil; Z Z\,iT
gle_~es'K
/** g3Xq@RAJc
* @author treeroot BD\xUjd?)Q
* @since 2006-2-2 @K3<K(
* @version 1.0 HYZ94[Ti
*/ 'Oyz/P(p
public class HeapSort implements SortUtil.Sort{ E#Smi507p
"z1\I\ ^
/* (non-Javadoc) GxuFO5wz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AQDT6E:
*/ wm=!tx\`k
public void sort(int[] data) { =3_I;Lw
MaxHeap h=new MaxHeap(); N3!x7J7A
h.init(data); 7D@O:yO
for(int i=0;i h.remove(); >Ke4lO"
System.arraycopy(h.queue,1,data,0,data.length); :{E;*v_!v
} *[) b}?
J/:9;{R
private static class MaxHeap{ f-E]!\Pg
:-fCyF)EI
void init(int[] data){ w[S2 ]<
this.queue=new int[data.length+1]; kid3@
for(int i=0;i queue[++size]=data; N2 wBH+3w
fixUp(size); "M3R}<Vt
} uosFpa
} D'$ki[{,
vSb$gl5H
private int size=0; !iN=py
d OQU#5
private int[] queue; w4\b^iJz
f R$E*Jd
public int get() { /. k4Y
return queue[1]; d3v5^5kU
} %AwR4"M
suC]
public void remove() { _VLc1svv
SortUtil.swap(queue,1,size--); )$p<BLU
fixDown(1); MDZ,a0?4t
} &^=6W3RD
file://fixdown E:a_f!
private void fixDown(int k) { ,_,Z<X/
int j; T>7$<ulm
while ((j = k << 1) <= size) { \DI%/(?
if (j < size %26amp;%26amp; queue[j] j++; <7NY.zvwk]
if (queue[k]>queue[j]) file://不用交换 ae`*0wbv
break; :P1 J>dcG
SortUtil.swap(queue,j,k); _z4c7_H3
k = j; ^oDCF
} yr9%,wwN
} d~M;@<eD
private void fixUp(int k) { M0YV Qa
while (k > 1) { 4D=p#KZ
int j = k >> 1; gXBC= ?jl
if (queue[j]>queue[k]) ;7Cb!v1
break; [xe(FFl+
SortUtil.swap(queue,j,k); g <S&sYF5
k = j; Q(=} PF
} h;?=:(
} rtd&WkU rD
b+bgGLo
} 3WZdP[o!
ZV=O oLt,
} \bNN]=
xfZ.
SortUtil： 9y"R,
O~sv^
package org.rut.util.algorithm; ?:73O`sX:
iOXxxP%#
import org.rut.util.algorithm.support.BubbleSort; *{5p/}p
import org.rut.util.algorithm.support.HeapSort; iPgewjx
import org.rut.util.algorithm.support.ImprovedMergeSort; yxP(|
import org.rut.util.algorithm.support.ImprovedQuickSort; n]c6nX:'
import org.rut.util.algorithm.support.InsertSort; |)`<D
import org.rut.util.algorithm.support.MergeSort; MHar9)$}
import org.rut.util.algorithm.support.QuickSort; \Jq$!foYx
import org.rut.util.algorithm.support.SelectionSort; ^x8*]Sz#x
import org.rut.util.algorithm.support.ShellSort; "& h;\hL
lJ1_Zs `
/** ZZ|a`U
* @author treeroot E:'TZ4Z
* @since 2006-2-2 /qM:;:N%j
* @version 1.0 N.R,[K
*/ ?"-%>y@w
public class SortUtil { L@xag-b i
public final static int INSERT = 1; ^oaFnzJdf
public final static int BUBBLE = 2; 4&]Sb}
public final static int SELECTION = 3; `L n,qiA
public final static int SHELL = 4; .;nU" a3'
public final static int QUICK = 5; T:k-`t0":N
public final static int IMPROVED_QUICK = 6; /<ODP6Yy;
public final static int MERGE = 7; 3Run.Gv\
public final static int IMPROVED_MERGE = 8; V/xGk9L~
public final static int HEAP = 9; 0*G =~:
6?GR+;/
public static void sort(int[] data) { UolsF-U}'
sort(data, IMPROVED_QUICK); b'F#Y9
} R{={7.As+
private static String[] name={ %N``EnF2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /BeA-\B
}; ?5@!r>i=<
euO!vLdX
private static Sort[] impl=new Sort[]{ ^U1@ hq*u
new InsertSort(), D2<(V,h9
new BubbleSort(), #2AKO/
new SelectionSort(), -CePtq`
new ShellSort(), .&Tcds
new QuickSort(), J" :R,w`
new ImprovedQuickSort(), ;;|S QX
new MergeSort(), phkfPvL{
new ImprovedMergeSort(), Am>^{qh9
new HeapSort() E&js`24 &
}; @q8h'@sX
nKxu8YAJe
public static String toString(int algorithm){ YKCd:^u
return name[algorithm-1]; m][i-|@M
} o!bIaeEaU
]nmVT~lBe"
public static void sort(int[] data, int algorithm) { KYe@2 6
impl[algorithm-1].sort(data); G!Gbg3:4e5
} Zw4z`x1f
/O@TqH
public static interface Sort { G_m$W3 zS
public void sort(int[] data); V!^5#A<
} :<Z>?x
:`U@b 6
public static void swap(int[] data, int i, int j) { {|:ro!&
int temp = data; @ ={Hx$zL
data = data[j]; 6d%V=1^F
data[j] = temp; Eu;f~ V
} Tw`n3y?
} G%Dhj)2}