[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; VW{aUgajO
} kO..~@aY
int i1=l; kwDh|K
int i2=mid+1; up+.@h{
for(int cur=l;cur<=r;cur++){ y"|K |QT
if(i1==mid+1) t`<}UWAH+
data[cur]=temp[i2++]; C}(<PNT
else if(i2>r) zqekkR]
data[cur]=temp[i1++]; ]ZR{D7.?
else if(temp[i1] data[cur]=temp[i1++]; P<cMP)+K
else ,<0Rf
data[cur]=temp[i2++]; RI[7M (
} }J+ce
} %jbJ6c
2d5}`>
} #sz]PZ\
2A*X Hvwb
改进后的归并排序: )Y&MIJ7>@
]^yV`Z8
package org.rut.util.algorithm.support; #Dj"W8'zh
?Kx6Sf<i
import org.rut.util.algorithm.SortUtil; 95.qAFB1
cW81
/** R/ALR
* @author treeroot z9k*1:
* @since 2006-2-2 b"ol\&1 #
* @version 1.0 msA' 5>
*/ ShL1'Z}^{
public class ImprovedMergeSort implements SortUtil.Sort { X[GIOPDx
VZT6;1TD$8
private static final int THRESHOLD = 10; 1&X}1
u#a%(
/* A0cM(w{7_
* (non-Javadoc) 936Ff*%(l
* 4c5^7";P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) avu*>SB
*/ Ij;==f~G
public void sort(int[] data) { x !#Ma
int[] temp=new int[data.length]; ]k[Q]:q
mergeSort(data,temp,0,data.length-1); 8BYIxHHz
} .DgoOo%?"
ri/t(m^{W
private void mergeSort(int[] data, int[] temp, int l, int r) { w8AJ#9W
int i, j, k; wb(*7 &eP:
int mid = (l + r) / 2; nuf@}W>y
if (l == r) Q `e~MD
return; >:w?qEaE
if ((mid - l) >= THRESHOLD) jgk{'_ j
mergeSort(data, temp, l, mid); `FZ(#GDF
else K)<Wm,tON
insertSort(data, l, mid - l + 1); b\SXZN)Be
if ((r - mid) > THRESHOLD) ~/^y.SsWM
mergeSort(data, temp, mid + 1, r); 5xh!f%6
else @Ufa-h5"(
insertSort(data, mid + 1, r - mid); RpHpMtvNo/
<MPeh&_3#
for (i = l; i <= mid; i++) { @+}rEe_(
temp = data; JfI aOhKs]
} +IwdMJ8&8
for (j = 1; j <= r - mid; j++) { Xtuhcdzu[
temp[r - j + 1] = data[j + mid]; Pk$}%;@v
} W0VA'W
int a = temp[l]; D3<IuWeM
int b = temp[r]; 4^ c!_K&&
for (i = l, j = r, k = l; k <= r; k++) { MC4284A5
if (a < b) { sx-EA&5-9k
data[k] = temp[i++]; #^5a\XJb
a = temp; :~\LOKf
} else { =jJ H^Y2
data[k] = temp[j--]; >}-~rZ
b = temp[j]; `)rg|~#k
} ?cqicN.+6
} ?wGiog<Q{
} JaH* rDs-
Na\3.:]z
/** >nc4v6s
* @param data .i MnWW
* @param l 5,F;j<F
* @param i Bj;\mUsk
*/ LiiK3!^i
private void insertSort(int[] data, int start, int len) { 4st~3,lR$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /6Y0q9
} 5gO/-Zj
} %l Q[dXp
} J$1j-\KS
} zl0;84:H
t[%x}0FP-F
堆排序： ^$e0t;W=
/m97CC#+
package org.rut.util.algorithm.support; l<u{6o
}16&1@8
import org.rut.util.algorithm.SortUtil; pgCd
#0}Ok98P
/** )J;ny!^2
* @author treeroot 6a7vlo
* @since 2006-2-2 P;j&kuW|zL
* @version 1.0 :lgHL3yl
*/ >NJjS8f5
public class HeapSort implements SortUtil.Sort{ 2K3MAd{
Xwn3+tSIa
/* (non-Javadoc) !A~d[</]m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F;pTXt}?5
*/ cN62M=**
public void sort(int[] data) { ^gd<lo g
MaxHeap h=new MaxHeap(); |a%B|CX
h.init(data); 5i|s>pD4z1
for(int i=0;i h.remove(); $2Kau 1
System.arraycopy(h.queue,1,data,0,data.length); [.{^"<Z<
} a@Mq J=<L
`+oV/:Q3
private static class MaxHeap{ `GPQ((la
^SEc./$
void init(int[] data){ Tj Mb>w9
this.queue=new int[data.length+1]; DG3[^B
for(int i=0;i queue[++size]=data; pfR"s:#
fixUp(size); 5f8"j$Az
} +Dd"41
} v5B" A"N
R|-6o)$
private int size=0; Sc$gnUYD{
nHnk#SAAu
private int[] queue; xsYE=^uv
/CH(!\bQ
public int get() { ,E%1Uq"
return queue[1]; 9e]'OKL+
} o\&~CW~@~
`(3SfQ-
public void remove() { ooY\t +
SortUtil.swap(queue,1,size--); =PV/`I_h
fixDown(1); wcwQjHwd
} ~eHRlXL'
file://fixdown juH wHt
private void fixDown(int k) { K|US~Hgv
int j; #hpIyy%n
while ((j = k << 1) <= size) { F#B5sLNb
if (j < size %26amp;%26amp; queue[j] j++; sA3UeTf
if (queue[k]>queue[j]) file://不用交换 )9MrdVNv
break; O)OUy
SortUtil.swap(queue,j,k); 21ViHV
k = j; vmvFBzLR
} ZBF1rx?
} \<X2ns@Tf
private void fixUp(int k) { vm|!{5l:=y
while (k > 1) { W,DZ ;).%
int j = k >> 1; WK*S4c
if (queue[j]>queue[k]) R+d< fe
break; w(Gz({l+
SortUtil.swap(queue,j,k); mGO>""<:
k = j; `YU=~xQ
} 2yvVeo&3
} #\LZ;&T'N
Nl {7
} BY$[g13
<FQFv IKg
} jP+ pA e
2)=la%Nx
SortUtil： U,'EF[t
n08; <
package org.rut.util.algorithm; iTu0T!4F
)%qtE34`
import org.rut.util.algorithm.support.BubbleSort; ~\[?wN
import org.rut.util.algorithm.support.HeapSort; p'g^Wh
import org.rut.util.algorithm.support.ImprovedMergeSort; %&tb9_T)d
import org.rut.util.algorithm.support.ImprovedQuickSort; .1LPlZ
import org.rut.util.algorithm.support.InsertSort; 7-X/>v
import org.rut.util.algorithm.support.MergeSort; I(n }<)eF
import org.rut.util.algorithm.support.QuickSort; p-,Iio+
import org.rut.util.algorithm.support.SelectionSort; S.W^7Ap
import org.rut.util.algorithm.support.ShellSort; ck$M(^)l
)km7tA 0a
/** 8aZ$5^z
* @author treeroot Pxqiv9D<R
* @since 2006-2-2 =-Nsc1&
* @version 1.0 ;\x~'@
*/ {OCJ(^8i
public class SortUtil { LQqfi ~
public final static int INSERT = 1; :Jk33 N4y0
public final static int BUBBLE = 2; 3{e'YD~hP
public final static int SELECTION = 3; O:e#!C8^
public final static int SHELL = 4; [x5mPjgw
public final static int QUICK = 5; w4,]2Ccn.
public final static int IMPROVED_QUICK = 6; /&(1JqzlB
public final static int MERGE = 7; J(e7{aRJ9
public final static int IMPROVED_MERGE = 8; iDw.i"b
public final static int HEAP = 9; GmA!Mo
O,|\"b1(
public static void sort(int[] data) { t8/%Dgu
sort(data, IMPROVED_QUICK); 3;l"=#5
} Xk,>l6vc
private static String[] name={ ZdH1nX(Yh3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /c#l9&,
}; ! Mo`^t
'E-FO_N
private static Sort[] impl=new Sort[]{ ^C7C$TZS
new InsertSort(), G6Nb{m
new BubbleSort(), NAJVr}4f
new SelectionSort(), 63M=,0-Qt
new ShellSort(), DsGI/c
new QuickSort(), %i"}x/CD[
new ImprovedQuickSort(), EnJ!mr
new MergeSort(), =EpJZt
new ImprovedMergeSort(), 0hwj\{"
new HeapSort() PS@*qTin
}; Ri @`a
J633uH}}
public static String toString(int algorithm){ 7W|Zq6pi
return name[algorithm-1]; M{E{NK
} NXI[q'y
hcyO97@r
public static void sort(int[] data, int algorithm) { S-!=NX&C
impl[algorithm-1].sort(data); 0 iRR{a<
} mU@xcN
>DP:GcTG
public static interface Sort { 3=- })X;
public void sort(int[] data); !re1EL
} `!i-#~n
/:p8I6;
public static void swap(int[] data, int i, int j) { wkBL=a
int temp = data; N4wA#\-
data = data[j]; wz=z?AZW
data[j] = temp; P1V1as
} d~Mg vh'
} i_ QcC