[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; Ku&(+e
} ,1~Zqprn
int i1=l; //J:p,AF
int i2=mid+1; ]G1j\wnF
for(int cur=l;cur<=r;cur++){ `4k;`a
if(i1==mid+1) s{s0#g
data[cur]=temp[i2++]; 6,@M0CX
else if(i2>r) +ixDB0"\
data[cur]=temp[i1++]; >hQR
else if(temp[i1] data[cur]=temp[i1++]; +vU.#C_2
else 3M@>kIT8
data[cur]=temp[i2++]; +uT=Wb \
} W/\7m\B
} 66|lQE&n
dHp6G^Y
} L1F){8[
vo::y"
改进后的归并排序: il#rdJ1@t
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package org.rut.util.algorithm.support; ?0?'
CC)9Ks\
import org.rut.util.algorithm.SortUtil; kBONP^xI
A%GJ|h,i
/** ko5\*!|:lj
* @author treeroot 8p5'}Lq
* @since 2006-2-2 VqbiZOZ@
* @version 1.0 ]$L[3qA.
*/ +\W"n_PPy
public class ImprovedMergeSort implements SortUtil.Sort { >^Y9p~
ITsJjcYw
private static final int THRESHOLD = 10; JQtH},Tr
<!+o8z]
/* ,88Y1|:X
* (non-Javadoc) `2@-'/$\I|
* xS(sRx+A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ee|@l3)
*/ >N,G@{FR
public void sort(int[] data) { CD[7h
int[] temp=new int[data.length]; *jJ62-o
mergeSort(data,temp,0,data.length-1); VLO>{"{'
} :?p{ga9
p0tv@8C>
private void mergeSort(int[] data, int[] temp, int l, int r) { 'sA&Pm
int i, j, k; z N t7DK
int mid = (l + r) / 2; /tUl(Fp J`
if (l == r) 4/h2_
return; ]Yj>~k:K
if ((mid - l) >= THRESHOLD) Gg!))I+
mergeSort(data, temp, l, mid); jNyC%$
else y&CUT:M6
insertSort(data, l, mid - l + 1); 9.@(&
if ((r - mid) > THRESHOLD) fC-^[Af)
mergeSort(data, temp, mid + 1, r); p;5WLAF
else b9YpUm7#
insertSort(data, mid + 1, r - mid); +p[~hM6?
6 %=BYDF
for (i = l; i <= mid; i++) { JxvwquI
temp = data; =3T?U_u@
} }+lxja]C
for (j = 1; j <= r - mid; j++) { H,I}R
temp[r - j + 1] = data[j + mid]; :D,YR(])
} ew"Fr1UGYZ
int a = temp[l]; lvN{R{7>
int b = temp[r]; oby*.61?5l
for (i = l, j = r, k = l; k <= r; k++) { ;?[~]"
if (a < b) { [a`i{(!
data[k] = temp[i++]; 5{5ABV
a = temp; x'KsQlI/
} else { OP&[5X+Y
data[k] = temp[j--]; D!P?sq_5r
b = temp[j]; [yyV`&
} o2|(0uN'
} MvW>ktkU
} 5^Y/RS i
L,ra=SVF
/** =I5XG"",
* @param data N\fT6#5B
* @param l nZT@d;]U9
* @param i |-mazvA
*/ jgstx3
private void insertSort(int[] data, int start, int len) { \1Bgs^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9?:S:Sq
} J#kdyBmuO
} w* I+~o-
} c]]F`B
} s6D-?G*u%8
H94.E|Q\+
堆排序： p3S c4
>ob/@
package org.rut.util.algorithm.support; w|HZI,~
W<4\4
import org.rut.util.algorithm.SortUtil; ]M2<I#hF.
./ :86@O
/** 8F* WT|]
* @author treeroot HZm i?
* @since 2006-2-2 X2`>@GR/>
* @version 1.0 g@2.A;N0
*/ Z]Y4NO;
public class HeapSort implements SortUtil.Sort{ `#f=&S?k
caP
/* (non-Javadoc) |z'?3?,~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j+9 S
*/ R]Oy4U,f
public void sort(int[] data) { (*ng$zZ$
MaxHeap h=new MaxHeap(); ETOc4hMO
h.init(data); hkJZqUA
for(int i=0;i h.remove(); jE#8&P~
System.arraycopy(h.queue,1,data,0,data.length); CwvNxH#LVu
} /RM-+D:Y
W,~1KUTc
private static class MaxHeap{ 78)^vvn5~
k~#|8eLv
void init(int[] data){ Q8x{V_Pot
this.queue=new int[data.length+1]; K5>:WiY
for(int i=0;i queue[++size]=data; @QG1\W'
fixUp(size); `k&K"jA7$
} l:eNu}{&
} KV_Ga8hs
@"8QG^q8de
private int size=0; DKl7|zG4
}/spo3,6
private int[] queue; J7GsNFL
fYy.>m+P1
public int get() { ^0Q*o1W
return queue[1]; yxN!*~BvL
} \zU5G#LQ
?U08A{ c
public void remove() { e_], O_Z
SortUtil.swap(queue,1,size--); .@Uz/j?>
fixDown(1); [MS.5+1Y
} !j9i=YDb
file://fixdown mPin\-I
private void fixDown(int k) { B:~;7A\
int j; <gLtX[v!CL
while ((j = k << 1) <= size) { 05B+WJ1
if (j < size %26amp;%26amp; queue[j] j++; m;f?}z_\$
if (queue[k]>queue[j]) file://不用交换 }qhK.e
break; 5$U>M
SortUtil.swap(queue,j,k); YSo7~^1W"
k = j; N| Pm|w*?
} Ra5'x)m36)
} ^gzNP#A<'o
private void fixUp(int k) { "PaGDhS
while (k > 1) { fR4l4 GU?)
int j = k >> 1; M7R&J'SAY
if (queue[j]>queue[k]) t3$gwO$
break; JF%=Bc$C
SortUtil.swap(queue,j,k); 3|Sy'J0'K
k = j; C-u/{CP
} Ok&>[qu
} HY;?z`=
%uVJLz
} 1:zu$|%7
g@i>R>
} 4D$sFR|?t
*\KvcRMGUa
SortUtil： b',bi.FH
b0Ov+ )7#
package org.rut.util.algorithm; `?^w
rJZs 5g`
import org.rut.util.algorithm.support.BubbleSort; ZT8Ji?_n
import org.rut.util.algorithm.support.HeapSort; Lzx$"R-
import org.rut.util.algorithm.support.ImprovedMergeSort; 'S7@+kJ
import org.rut.util.algorithm.support.ImprovedQuickSort; w"agn}CK
import org.rut.util.algorithm.support.InsertSort; nFnF_
import org.rut.util.algorithm.support.MergeSort; QX.6~*m1
import org.rut.util.algorithm.support.QuickSort; noNF;zT
import org.rut.util.algorithm.support.SelectionSort; /Jf`x>eiH
import org.rut.util.algorithm.support.ShellSort; v7FRTrqjj
|vN@2h(|"
/** 8UT%:DlxQ
* @author treeroot F[D0x26^
* @since 2006-2-2 XYHCggy
* @version 1.0 M |?p3%
*/ ?w37vsN
public class SortUtil { V/}>>4
public final static int INSERT = 1; qzt2j\v
public final static int BUBBLE = 2; I"32[?0 (;
public final static int SELECTION = 3; $Cd;0gdv
public final static int SHELL = 4; nP\V1pgA
public final static int QUICK = 5; DJYXC,r
public final static int IMPROVED_QUICK = 6; !Vr45l
public final static int MERGE = 7; =j+oKGkoCa
public final static int IMPROVED_MERGE = 8; Ge:-|*F
public final static int HEAP = 9; 6~h1iY_~
M1]6lg[si
public static void sort(int[] data) { YD46Z~$
sort(data, IMPROVED_QUICK); _8b]o~[Z+
} ?ey&Un"
private static String[] name={ MAe<.DHY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `x$}~rP&)!
}; 'CX.qxF1;p
n22hVw
private static Sort[] impl=new Sort[]{ xcZ%,7
new InsertSort(), M&djw`B
new BubbleSort(), Uk*;C
new SelectionSort(), iCnUnR{
new ShellSort(), TdP{{&'9
new QuickSort(), 3H'nRK},
new ImprovedQuickSort(), rw8J:?0x
new MergeSort(), nN=:#4 >Y
new ImprovedMergeSort(), pO/SV6N
new HeapSort() vbA7I<;
}; A2|o=mOH
))IgB).3M
public static String toString(int algorithm){ 7t-*L}~WA
return name[algorithm-1]; `@$"L/AJ
} B}q
X}j'L&{F@
public static void sort(int[] data, int algorithm) { 0?F@iB~1F
impl[algorithm-1].sort(data); MeI2i
} &@W4^-9
2&gVZz
public static interface Sort { !/4V^H
public void sort(int[] data); c[h'`KXJf-
} g/l0}%
&=z1$ih>2\
public static void swap(int[] data, int i, int j) { o7Cnyy#:
int temp = data; lv00sa2z
data = data[j]; ~w1{zxs
data[j] = temp; fsrg2:kQ
} +(<n |~
} <RoX|zJw