[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; WC2sRv4]3
} D^]g`V*N
int i1=l; hnOo T? V
int i2=mid+1; IRWVoCc9/\
for(int cur=l;cur<=r;cur++){ p7H0|>
if(i1==mid+1) g!/O)X3
data[cur]=temp[i2++]; Ife/:v
else if(i2>r) >@Vap
data[cur]=temp[i1++]; =i'APeNaQ
else if(temp[i1] data[cur]=temp[i1++]; o$PY0~#
else Sfl. &A(
data[cur]=temp[i2++]; >;wh0dBe
} -zn$h$N4
} *@;Pns]L-
lVb{bO9-O
} [S Jx\Os
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改进后的归并排序: -@=As00Bg
~m`j=ot
package org.rut.util.algorithm.support; 4MM /i}
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import org.rut.util.algorithm.SortUtil; L_@P fI
mbSG
/** w|t}.u
* @author treeroot MS7rD%(,'
* @since 2006-2-2 %%uvia=e
* @version 1.0 4$~A%JN3
*/ m$XMq
public class ImprovedMergeSort implements SortUtil.Sort { wk+| }s
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private static final int THRESHOLD = 10; }\#u~k!l
:'6vIPN5
/* ;RR\ Hwix
* (non-Javadoc) $p(
* 7XM:4whw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;W~H|M
*/ M9C v00&
public void sort(int[] data) { Fy#y.jK9v
int[] temp=new int[data.length]; !xD$U/%c
mergeSort(data,temp,0,data.length-1); g"}j
} ^*g= 65!1
]a=n(`l?
private void mergeSort(int[] data, int[] temp, int l, int r) { s:/Wz39SY3
int i, j, k; \&XtPQ
int mid = (l + r) / 2; ]H {g/C{j
if (l == r) ?1afW)`a.v
return; $cSmubZK
if ((mid - l) >= THRESHOLD) xI>HY9i)
mergeSort(data, temp, l, mid); KA/~q"N
else j|-{*t{/x
insertSort(data, l, mid - l + 1); ~rfUqM]I
if ((r - mid) > THRESHOLD) r"4&.&6
mergeSort(data, temp, mid + 1, r); ']C" 'b
else qsG}A
insertSort(data, mid + 1, r - mid); |s!<vvp]
[wkSY>Gu
for (i = l; i <= mid; i++) { 3UgPVCT
temp = data; ,R$U(,>_0
} cgV5{|P
for (j = 1; j <= r - mid; j++) { $?*XPzZ
temp[r - j + 1] = data[j + mid]; =WEWs4V5A
} P;bOtT --
int a = temp[l]; .VA'W16
int b = temp[r]; J;5G]$s
for (i = l, j = r, k = l; k <= r; k++) { SdXAL
if (a < b) { MA+{7 [
data[k] = temp[i++]; cv7.=*Kb;
a = temp; JWsOze8#
} else { D6fGr$(N%
data[k] = temp[j--]; &Db'}Y?x]
b = temp[j]; gg?O0W{
} p?,T%G+gqO
} M?v`C>j
} cnL@j_mb
@$7l
/** v$~ZT_"(9
* @param data 4c,{Js
* @param l 91oAg[@4G
* @param i ,R*YI
*/ &`B Tw1u
private void insertSort(int[] data, int start, int len) { 7J|eL yj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3e?a$~9
} \Lz4ZZjSY
} `ZPV.u/
} a=r^?q'/
} eMOnzW|h
}&Ul(HR
堆排序： JPM W|JT
Clmz}F
package org.rut.util.algorithm.support; ?{(Jy*
P"s7}cl
import org.rut.util.algorithm.SortUtil; nC@UK{tVa
xG8z4Yu
/** w1,6%?p(O
* @author treeroot ?UBhM,;XK
* @since 2006-2-2 &d6
* @version 1.0 +"3K)9H
*/ %Hpz^<`
public class HeapSort implements SortUtil.Sort{ W~?mr!`
K{__rO
/* (non-Javadoc) NGAjajB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;|D8"D6]
*/ ;T|hNsSt
public void sort(int[] data) { tW \q;_DSr
MaxHeap h=new MaxHeap(); *k !zdV
h.init(data); Uq=!>C8
for(int i=0;i h.remove(); 8?[#\KgH1
System.arraycopy(h.queue,1,data,0,data.length); 6B&ERdoX
} kWxcB7)uk
%R-KkK<S
private static class MaxHeap{ FQO>%=&4
HyJ&;4rf
void init(int[] data){ T?EFY}f
this.queue=new int[data.length+1]; - %`iLu
for(int i=0;i queue[++size]=data; *:,y`!F=y
fixUp(size); _Bq[c
} m:C|R-IL
} vx4Jk]h+=L
:M\3.7q
private int size=0; I7HP~v~
jB0ED0)wX
private int[] queue; t4FaU7
5tcJTz
public int get() { &)F#cVB
return queue[1]; jbs)]fqC;
} 11BfJvs:
oWcBQ|
public void remove() { ;0Mg\~T~'
SortUtil.swap(queue,1,size--); > m##JzWLr
fixDown(1); NSDls@m
} l3;MjNB^V
file://fixdown PJ'.s
private void fixDown(int k) { 8BggK6X
int j; dH+oV`
while ((j = k << 1) <= size) { >@i{8AD
if (j < size %26amp;%26amp; queue[j] j++; 4qmaL+Q
if (queue[k]>queue[j]) file://不用交换 )/4U]c{-
break; H<C+rAIb
SortUtil.swap(queue,j,k); g/jlG%kI}
k = j; '/Ag3R
} ~/1eF7
} Fa9gr/.F,@
private void fixUp(int k) { |<w Z;d
while (k > 1) { 4<l&cP
int j = k >> 1; tjt#2i8/
if (queue[j]>queue[k]) {aYCrk1
break; /+{1;}AT
SortUtil.swap(queue,j,k); O>Ao#_*hOb
k = j; <"}WpT
} 3`>nQ4zC
} _sI\^yZd
XE.Y?{,R$
} Q??nw^8Hi
\ 0aa0=
} Q\{$&0McF
a!*K)x,"<
SortUtil： i~;Yrc%AEX
<|c[ #f
package org.rut.util.algorithm; r^$WX@ t&
X8| 0RU@f
import org.rut.util.algorithm.support.BubbleSort; :Tn1]a)f6
import org.rut.util.algorithm.support.HeapSort; c(!8L\69V}
import org.rut.util.algorithm.support.ImprovedMergeSort; EP}NT)z,{
import org.rut.util.algorithm.support.ImprovedQuickSort; F<|x_6a\
import org.rut.util.algorithm.support.InsertSort; 'qnnZE
import org.rut.util.algorithm.support.MergeSort; 2kQa3Pan
import org.rut.util.algorithm.support.QuickSort; 8[mj*^P
import org.rut.util.algorithm.support.SelectionSort; z!/ MBM
import org.rut.util.algorithm.support.ShellSort; iVqa0Gl+}
@Sd l~'"
/** ?R\:6x<
* @author treeroot 5$Aiez~tBq
* @since 2006-2-2 =~F.7wq*^
* @version 1.0 DTp|he
*/ 6n5>{X
public class SortUtil { F]7$Y
public final static int INSERT = 1; G,JK$j>*l
public final static int BUBBLE = 2; 3m59EI-p
public final static int SELECTION = 3; -3eHJccB
public final static int SHELL = 4; )kuw&SH,
public final static int QUICK = 5; E1V;eoK.D
public final static int IMPROVED_QUICK = 6; v %GcNjZk5
public final static int MERGE = 7; wC4:OJ[d
public final static int IMPROVED_MERGE = 8; &W:R#/|
public final static int HEAP = 9; HE>sZ;
7(<z=F
public static void sort(int[] data) { .~yz1^ c
sort(data, IMPROVED_QUICK); [sweN]b6F
} n;,>Fv
private static String[] name={ s2M|ni=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U2)y fhI
}; @N,I}_9-
bRb+3au_x
private static Sort[] impl=new Sort[]{ ~f:jI1(}
new InsertSort(), |m /XGr
new BubbleSort(), =x3ZQA
new SelectionSort(), E#A}J:
new ShellSort(), L fx$M
new QuickSort(), |"XxM(Dm
new ImprovedQuickSort(), )Y:9sd8g7
new MergeSort(), r%^J3
new ImprovedMergeSort(), KWB;*P C^
new HeapSort() #I|jFn9
}; yqKERdm
*cnxp-)ub
public static String toString(int algorithm){ AB1,G|L
return name[algorithm-1]; 1} h''p
} #}U*gVYe
^lYa9k
public static void sort(int[] data, int algorithm) { yk7l{F
impl[algorithm-1].sort(data); Bk9? =
} XP'7+/A
56Gc[<nR
public static interface Sort { ("$ ,FRTQ:
public void sort(int[] data); __N#Y/e ]
} bcCCvV}6WZ
H^\2,x Z
public static void swap(int[] data, int i, int j) { sHi*\
int temp = data; `OWw<6`k
data = data[j]; m6D]
data[j] = temp; jQLiqi`
} c _faW
} "Ooc;xD3<