[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; )i>T\B
} H*>5ne=x
int i1=l; . J*2J(T,
int i2=mid+1; N" oJ3-~
for(int cur=l;cur<=r;cur++){ %] 7.E
if(i1==mid+1) ymyk.#Z<%
data[cur]=temp[i2++]; !^A t{[U
else if(i2>r) 2O9OEZdKB
data[cur]=temp[i1++]; ,1e@Y~eZ
else if(temp[i1] data[cur]=temp[i1++]; >(a/K2$*1
else HLM"dmI
data[cur]=temp[i2++]; N&lKo}hk
} \[x4
} .w]S!=h
3Kum
} 90)rOD1B
hn u/
改进后的归并排序: YyR~pT#ffT
w2`j&]D6
package org.rut.util.algorithm.support; aw/5#(1R
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import org.rut.util.algorithm.SortUtil; &rxR"^x\
zX/9^+p:
/** jl4rEzVu
* @author treeroot bjq2XP?LL
* @since 2006-2-2 Mxe
* @version 1.0 t\C[mw
*/ ]qc2jut"
public class ImprovedMergeSort implements SortUtil.Sort { tt>=Vt'
cb~m==G
private static final int THRESHOLD = 10; uw@|Y{(K r
jDc5p3D&[]
/* wD&b[i
* (non-Javadoc) <$ Ar*<,6
* Z?-l-sK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T/C1x9=?
*/ 1e^-_Bo6'o
public void sort(int[] data) { (wIpq<%
int[] temp=new int[data.length]; ouUU(jj02
mergeSort(data,temp,0,data.length-1); nS1D&;#Y
} {%b-~& F9
x_5H_! \#
private void mergeSort(int[] data, int[] temp, int l, int r) { ];go?.*C
int i, j, k; xTL"%'|
int mid = (l + r) / 2; SLc'1{
if (l == r) WChJ <[]W
return; D*j\gI
if ((mid - l) >= THRESHOLD) QRv2%^L
mergeSort(data, temp, l, mid); r yO\$m
else 6y9#am?
insertSort(data, l, mid - l + 1); ToVm]zPOUt
if ((r - mid) > THRESHOLD) @YTZnGG*
mergeSort(data, temp, mid + 1, r); Io&F0~Z;;(
else 5q?ZuAAA
insertSort(data, mid + 1, r - mid); b=+'i
?o9g5Z
for (i = l; i <= mid; i++) { *^u5?{$l(
temp = data; Kq;Yb&
} FiqcM-Af4
for (j = 1; j <= r - mid; j++) { R{hKl#j;>
temp[r - j + 1] = data[j + mid]; SpY%2Y.Dy
} iB5Se
int a = temp[l]; # -Ts]4v
int b = temp[r]; UpS`KgF"v
for (i = l, j = r, k = l; k <= r; k++) { PGHl:4`Es!
if (a < b) { 6l>$N?a
data[k] = temp[i++]; xGeRoW(X
a = temp; 7m=tu?@
} else { puz~Rfn#*
data[k] = temp[j--]; X@)5F 9
b = temp[j]; {e?D6`#x
} mPxph>o
} ~8Z0{^
} :_Y@,CpIEg
GKwm %A
/** PDo%ob\Ym
* @param data eVDI7W:(Sn
* @param l i1?H*:]
* @param i iVt6rX
*/ x,z+l-y
private void insertSort(int[] data, int start, int len) { ?8n`4yO0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nrMm](Y45
} DEL#MD!
} 7!`,P
} Nq)=E[$
} n||/3-HDj
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堆排序： =x~HcsJ8!R
+)FB[/pXk
package org.rut.util.algorithm.support; W9?Vh{w
T'l >$6
import org.rut.util.algorithm.SortUtil; {ls$#a+d
YzSUJ=0/
/** 8|w_PP1oE
* @author treeroot nJ4i[j8
* @since 2006-2-2 Qsc%qt-l
* @version 1.0 FMuM:%&J]
*/ {|6(_SM|
public class HeapSort implements SortUtil.Sort{ l=ZhHON
0*q&)
/* (non-Javadoc) c?CjJ}-7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9Ay*'
*/ _rK}~y=0
public void sort(int[] data) { b&Qj`j4]ZM
MaxHeap h=new MaxHeap(); jnX9] PkJ
h.init(data); !~cTe!T
for(int i=0;i h.remove(); XFPWW,
System.arraycopy(h.queue,1,data,0,data.length); DGTSk9iK(
} Dg4?,{c9W
rm NqS+t
private static class MaxHeap{ pUWj,&t
Zycu3%JI
void init(int[] data){ z)r)w?A
this.queue=new int[data.length+1]; 3ADTYt".
for(int i=0;i queue[++size]=data; '@9h@,tc
fixUp(size); GH![rK
} b:Dr_|
} 'QjX2ytgX
` a5$VV%J
private int size=0; !L+*.k:
|Z<NM#1
private int[] queue; `(?E-~#'
qIa|sV\w0
public int get() { AxUj CerNf
return queue[1]; -#H>kbs
} ^S'}RZ*>
Ft>Abj,6
public void remove() { $6T*\(;T@A
SortUtil.swap(queue,1,size--); `itaQGLD
fixDown(1); oW(p (>
} yw2^kk93|
file://fixdown c-!rJHL`
private void fixDown(int k) { T%Vii*?M
int j; 1K&z64Q5J
while ((j = k << 1) <= size) { [J0L7p*6
if (j < size %26amp;%26amp; queue[j] j++; Y!v `0z
if (queue[k]>queue[j]) file://不用交换 G:$wdT(u
break; w%)=`'s_
SortUtil.swap(queue,j,k); 6|t4\'
k = j; BCk$FM@
} iVzv/Lqm1
} ~oh=QakW
private void fixUp(int k) { Z+@"
while (k > 1) { 2P~zYdjS
int j = k >> 1; M;={]w@n
if (queue[j]>queue[k]) b2. xJ4
break; ]L%qfy4
SortUtil.swap(queue,j,k); Q2iS0#
k = j; aHe/MucK
} ,2/qQD n/
} a1B_w#?8
0n|op:]BHM
} FJgr=9>
&Jv j@,>$d
} l2U"4d!o
1g5%Gr/0$5
SortUtil： 'H<?K
i2A>T/?{
package org.rut.util.algorithm; 9~bje^M
g= k}6"F~
import org.rut.util.algorithm.support.BubbleSort; i2/:' i
import org.rut.util.algorithm.support.HeapSort; Zh]d&Xeq
import org.rut.util.algorithm.support.ImprovedMergeSort; Glcl7f"<^
import org.rut.util.algorithm.support.ImprovedQuickSort; `h/j3fmX?
import org.rut.util.algorithm.support.InsertSort; [S9T@Q
import org.rut.util.algorithm.support.MergeSort; R3<>]/1p|P
import org.rut.util.algorithm.support.QuickSort; c 's=>-X
import org.rut.util.algorithm.support.SelectionSort; 7-.YVM~R
import org.rut.util.algorithm.support.ShellSort; ?N<* ATCL
6]rIYc[,
/** k5]s~*,0
* @author treeroot e'mm42
* @since 2006-2-2 ! R?r)G5E
* @version 1.0 snOd 3Bw
*/ mnu4XE#|
public class SortUtil { So\(]S
public final static int INSERT = 1; Q5b?- P
public final static int BUBBLE = 2; h.ojj$f,
public final static int SELECTION = 3; i)g=Lew
public final static int SHELL = 4; mK5<;$
public final static int QUICK = 5; |\%[e@u
public final static int IMPROVED_QUICK = 6; kMAQHpDD
public final static int MERGE = 7; rY_)N^B|nF
public final static int IMPROVED_MERGE = 8; KlDW'R$
public final static int HEAP = 9; r4k=i4
uOc:^
public static void sort(int[] data) { `Lb^!6`)
sort(data, IMPROVED_QUICK); Lnbbv *
} fDhV *LqW
private static String[] name={ U0q{8 "Pl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" LCx{7bN1ro
}; O&Q_vY
N^pTj<M<g
private static Sort[] impl=new Sort[]{ OACRw%J:X{
new InsertSort(), $]Kgs6=r
new BubbleSort(), Ol6jx%Je`
new SelectionSort(), os|8/[gT
new ShellSort(), "qjkwf)\
new QuickSort(), 'Ar+k\.J
new ImprovedQuickSort(), >{p&_u.r-
new MergeSort(), mk8xNpk B
new ImprovedMergeSort(), )1wC].RFYm
new HeapSort() im|( 4f
}; M?Tb9c?`
T_|%nF-+
public static String toString(int algorithm){ "i_I<?aGB
return name[algorithm-1]; ~+}w>jIm{|
} S#6{4x4
Fxdu)F,~u
public static void sort(int[] data, int algorithm) { qk;*$Q
impl[algorithm-1].sort(data); u+UtvzUC
} b}< T<
x.CUJ^_.
public static interface Sort { |1wfLJ4--l
public void sort(int[] data); (+q#kKR
} >=BH$4Ce
ggtGecKm
public static void swap(int[] data, int i, int j) { ?TA%P6Lw
int temp = data; :kz*.1
data = data[j]; _^;+_6&[
data[j] = temp; QPB@qx#@
} 5[}3j1
} Osncl5PD)