[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; ;5QdT{$H
} Y@N-q
int i1=l; sw A^oU
int i2=mid+1; l0N~mes
for(int cur=l;cur<=r;cur++){ HE#IJB6BS?
if(i1==mid+1) g.$a]pZz
data[cur]=temp[i2++]; 706-QE^
else if(i2>r) Dz4e.tvN
data[cur]=temp[i1++]; ~Ry?}5&:
else if(temp[i1] data[cur]=temp[i1++]; FY1 >{Bn
else 9cQZ`Ex
data[cur]=temp[i2++]; y}Ji( q~
} 1h_TG.YL9>
} IJ >qs8
nKpXRuFn\
} foO/Yc
L|O[u^
改进后的归并排序: x{y}pH"H
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package org.rut.util.algorithm.support; *9Eep~ 6
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import org.rut.util.algorithm.SortUtil; 2H+!78
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/** p,#t[K
* @author treeroot t&m8 V$Q
* @since 2006-2-2 3[`/rg,
* @version 1.0 Yl}'hRp
*/ mN+ w,
public class ImprovedMergeSort implements SortUtil.Sort { Uj]Tdg
5qZebD2a
private static final int THRESHOLD = 10; x -CTMKX
= cQK^$6(
/* 5,Rxc=
* (non-Javadoc) o%Ubn*
* "QCtF55X&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E<6Fjy
*/ t@=*k9
public void sort(int[] data) { Ed">$S
int[] temp=new int[data.length]; ob=](
mergeSort(data,temp,0,data.length-1); FO[x c;
} (@wgNA-P
o_=t9\:
private void mergeSort(int[] data, int[] temp, int l, int r) { ^!a4!DGVT
int i, j, k; 2;&K*>g&.
int mid = (l + r) / 2; B<^yT@Wc
if (l == r) Gs`[\<;LI
return; ",&^ f
if ((mid - l) >= THRESHOLD) d'p]F~a
mergeSort(data, temp, l, mid); \.!+'2!m
else e'"2yA8dh"
insertSort(data, l, mid - l + 1); N>a. dYXr
if ((r - mid) > THRESHOLD) ?xkw~3Yfi
mergeSort(data, temp, mid + 1, r); `4GEq2%
else ^LAP*R
insertSort(data, mid + 1, r - mid); NJ%>|`FEi7
]{sx#|_S
for (i = l; i <= mid; i++) { 5t('H`,2
temp = data; wAt|'wP :
} K;uO<{a)r
for (j = 1; j <= r - mid; j++) { ]Q8[,HTG
temp[r - j + 1] = data[j + mid]; (}!xO?NA(
} [Q0n-b,Q
int a = temp[l]; Ui:WbH<b{
int b = temp[r]; 7dxe03h
for (i = l, j = r, k = l; k <= r; k++) { ohLM9mc9
if (a < b) { ,#/%Fn%T
data[k] = temp[i++]; Z|t`}lK
a = temp; D^m`&asC
} else { .{\lbI
data[k] = temp[j--]; Dt#( fuk#
b = temp[j]; *P:!lO\|
} /w|!SZB
} V= wWY*C
} HGiO}|q:
,>C`|
/** ;*J_V/&?
* @param data VWLqJd>tr1
* @param l 3P, ul*e
* @param i r]+/"~a
*/ ?:$aX@r
private void insertSort(int[] data, int start, int len) { '}$]V>/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); r(qwzUI
} }F B]LLi
} VoG_'P
} )I{~Pcq
} s@$SM,tnn
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堆排序： D*_Z"q_B
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package org.rut.util.algorithm.support; xGkc_
6d;_}
import org.rut.util.algorithm.SortUtil; 4{v?<x8
6?`3zdOeO
/** O-3R#sZ0
* @author treeroot )i^+=TZq
* @since 2006-2-2 Jc=~BT_G
* @version 1.0 eV5 e:9
*/ v?@=WG
public class HeapSort implements SortUtil.Sort{ t3l-]
S!Bnz(z
/* (non-Javadoc) <(E9U.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6Cpn::WW}
*/ QJH((
public void sort(int[] data) { xo GX&^=
MaxHeap h=new MaxHeap(); 7*MjQzg-P
h.init(data); O$*\JL
for(int i=0;i h.remove(); A[hvT\X
System.arraycopy(h.queue,1,data,0,data.length); eWk W,a
} 6Zx'$F.iqK
:OKU@l|
private static class MaxHeap{ 7`P1=`..
@{ CP18~:
void init(int[] data){ UCBx?9O/0
this.queue=new int[data.length+1]; $/)0iL{0
for(int i=0;i queue[++size]=data; <)]j;Tl
fixUp(size); D:56>%y@
} cT.8&EEW
} IxU#x*
L?&Trq7i
private int size=0; Z,QSbw@,7
m1#,B<6
private int[] queue; u-k!h
Ir?ehA
public int get() { 1i=p5,|
return queue[1]; IKFNu9*"h
} KB`">zq$u
8(@Y@`/
public void remove() { '-2|GX_o
SortUtil.swap(queue,1,size--); Cj10?BNV)
fixDown(1); 8h{;*Wr-
} NGp^/PZX0
file://fixdown }nt,DG!r
private void fixDown(int k) { /I@`B2
int j; Y{`hRz`
while ((j = k << 1) <= size) { aSMSuX8
if (j < size %26amp;%26amp; queue[j] j++; 3;er.SFu{
if (queue[k]>queue[j]) file://不用交换 +rOfQ'lQ
break; btDPP k'
SortUtil.swap(queue,j,k); B@K =^77
k = j; {SJnPr3R
} cHw-;
} M1,1J-h
private void fixUp(int k) { Aw,#oG {N
while (k > 1) { feA(Rj
int j = k >> 1; +V,Ld&r
if (queue[j]>queue[k]) Uv|^k8(
break; <=gf|(
SortUtil.swap(queue,j,k); a-Ne!M[
k = j; 3IYbgUG
} rrc>O*>{i
} *<l9d
]D\p<4uepM
} +]S!pyZ"
tKLAA+Z
} be(p13&od
`\Hs{t]
SortUtil： x-Fl|kwX.5
an` GY&
package org.rut.util.algorithm; |7:{vA5
_Z3_I_lW
import org.rut.util.algorithm.support.BubbleSort; V?C_PMa
import org.rut.util.algorithm.support.HeapSort; W}.p,d
import org.rut.util.algorithm.support.ImprovedMergeSort; >vk?wY^f
import org.rut.util.algorithm.support.ImprovedQuickSort; 9 Xx4,#?
import org.rut.util.algorithm.support.InsertSort; S+M:{<AR
import org.rut.util.algorithm.support.MergeSort; n||!/u)*
import org.rut.util.algorithm.support.QuickSort; <^YZ#3~1T
import org.rut.util.algorithm.support.SelectionSort; nH(Hk%~
import org.rut.util.algorithm.support.ShellSort; fudLm
fS- 31<?
/** O/{W:hJjd
* @author treeroot ~\~XD+jy"
* @since 2006-2-2 *h Bo,
* @version 1.0 d A' h7D
*/ L}.V`v{zc
public class SortUtil { :taRCh5
public final static int INSERT = 1; [.*o< KP
public final static int BUBBLE = 2; P(XNtQ=K
public final static int SELECTION = 3; -"X} )N2
public final static int SHELL = 4; Rss=ihlM
public final static int QUICK = 5; !#Hca
public final static int IMPROVED_QUICK = 6; oQ_n:<3X
public final static int MERGE = 7; cwKOE?!
public final static int IMPROVED_MERGE = 8; -nKBSls
public final static int HEAP = 9; -E>se8%"
!e(ZEV g
public static void sort(int[] data) { #Cz6c%yK
sort(data, IMPROVED_QUICK); t.tdY
} "Qxn}$6-
private static String[] name={ :O{oVR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xrky5[XoD
}; 2z=GKV
zFk@Y
private static Sort[] impl=new Sort[]{ :fE*fU@
new InsertSort(), `<kV)d%xEF
new BubbleSort(), MB]Y|Vee
new SelectionSort(), {r?qI
new ShellSort(), `Ao;xOJ
new QuickSort(), 8L}N,6gC4_
new ImprovedQuickSort(), Zjh9jvsW
new MergeSort(), /DQcM.3
new ImprovedMergeSort(), OJ\rT.{
new HeapSort() >`'>,n|
}; )gq(
j[o5fr)L
public static String toString(int algorithm){ J"dp?i
return name[algorithm-1]; ALY% h!L
} vXi}B
ds9`AiCW>
public static void sort(int[] data, int algorithm) { 3`aJ"qQE
impl[algorithm-1].sort(data); ,*$/2nB^
} tXIre-. 2}
Oz1ou[8k
public static interface Sort { y:zo/#34
public void sort(int[] data); D7Nz3.j
} j']Q-s(s
pd{;`EW|
public static void swap(int[] data, int i, int j) { %C8fv|@:f
int temp = data; k^PqB+P!
data = data[j]; Y)L\*+ >"[
data[j] = temp; 6@HY+RCx
} tKUy&]T
} UW[{Y|oE