[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; Th*mm3D6
} FkT% -I
int i1=l; jfrUOl'l
int i2=mid+1; 'w7{8^Z2
for(int cur=l;cur<=r;cur++){ {EupB?
if(i1==mid+1) 8|,-P=%t
data[cur]=temp[i2++]; G,i%:my7
else if(i2>r) gM3gc;
data[cur]=temp[i1++]; LvS3c9|Aj
else if(temp[i1] data[cur]=temp[i1++]; =;xlmndT,
else ; bDFrG
data[cur]=temp[i2++]; /7zy5
} %25_
} )uyh
y/2U:H
} 'lNl><e-
7f td2lv
改进后的归并排序: yQ8H-a.
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package org.rut.util.algorithm.support; @.iOFY
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import org.rut.util.algorithm.SortUtil; 2jx+q
z95V 7E
/** Bf88f<Z
* @author treeroot y]\R0lR
* @since 2006-2-2 }Mo9r4}
* @version 1.0 9Au+mIN
*/ i]LK,'
public class ImprovedMergeSort implements SortUtil.Sort { \9k{"4jX\
Xl*-A|:j
private static final int THRESHOLD = 10; |qNrj~n@
LGCL*Qbsg
/* Sb[rSczS~
* (non-Javadoc) @;,O V&XYn
* jIc;jjAF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zFuUv_t
*/ [%nG_np
public void sort(int[] data) { 0QIocha
int[] temp=new int[data.length]; l7J_s?!j
mergeSort(data,temp,0,data.length-1); c)E[K-u
} v981nJ>w,
Da-(D<[0
private void mergeSort(int[] data, int[] temp, int l, int r) { pr0V)C6
int i, j, k; 6l vx
int mid = (l + r) / 2; c)6Y.[).
if (l == r) lE|T'?/
return; X0Oq lAw
if ((mid - l) >= THRESHOLD) )Y&De)=
mergeSort(data, temp, l, mid); EJtU(HmW
else Z#MODf0H@
insertSort(data, l, mid - l + 1); YJ16vb9
if ((r - mid) > THRESHOLD) ^]R0d3?>\
mergeSort(data, temp, mid + 1, r); Eq<#pX6
else V!U[N.&$
insertSort(data, mid + 1, r - mid); lIFU7g
A^p $~e\)
for (i = l; i <= mid; i++) { wD,F=O
temp = data; WNYLQ=;
} }C&c=3V
for (j = 1; j <= r - mid; j++) { 8rpN2M3h
temp[r - j + 1] = data[j + mid]; l*m|b""].u
} ToJru
int a = temp[l]; 49zp@a
int b = temp[r]; }\*Sf[EMD
for (i = l, j = r, k = l; k <= r; k++) { dw4)4_
if (a < b) { +tN-X'u##
data[k] = temp[i++]; uATBt
a = temp; gq@."wHU
} else { N8{>M,
data[k] = temp[j--]; \4p<;$'
b = temp[j]; G\NCEE'A
} +Ae.>%}
} >SGSn/AJi
} er#=xqUY
X0$_KPn
/** Go67VqJr
* @param data TnaIRJ\B
* @param l 5#F+-9r
* @param i `cv:p|s
*/ 5UM[Iz
private void insertSort(int[] data, int start, int len) { 5,((JxX$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H= y-Y_R
} Le'\x`B
} j&mL]'Zy
} |5/[0V-vy
} n{yjH*\Z
*sG<w%%
堆排序： -/qrEKQ0U?
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package org.rut.util.algorithm.support; dCK-"#T!
k1H0hDE
import org.rut.util.algorithm.SortUtil; ZF/KV\Ag)
.eAC!R
/** I(CI')Q
* @author treeroot ~GeYB6F
* @since 2006-2-2 ^>p [b
* @version 1.0 ]xG4T>S
*/ YBO53S]=
public class HeapSort implements SortUtil.Sort{ ]O\W<'+V
4dK@UN\
/* (non-Javadoc) K]oPh:E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ttj5%~
*/ 'x0t, ;g
public void sort(int[] data) { !!86Sv
MaxHeap h=new MaxHeap(); I{PN6bn{>
h.init(data); W<L6,
for(int i=0;i h.remove(); WI,=?~-
System.arraycopy(h.queue,1,data,0,data.length); 80EY7#r@w
} l!=WqIZ
;R!H\
private static class MaxHeap{ `IoX'|C[h
zef,*dQY
void init(int[] data){ &B4U)
this.queue=new int[data.length+1]; w3Ohm7N[
for(int i=0;i queue[++size]=data; I@ k8^
fixUp(size); Jq#Cn+zW
} l}2WW1b(
} a=FRJQ8S
@^%_ir(
private int size=0; v^pP& <G
kI'A` /Bl
private int[] queue; `[\phv
^-!HbbVv
public int get() { [VW;L l
return queue[1]; k I~]u
} ;" *`
,no:6&#
public void remove() { QO.gt*"
SortUtil.swap(queue,1,size--); ODEXQl}R
fixDown(1); wjJ1Psnx
} '5U$`Xe1
file://fixdown 2&fwr>!$
private void fixDown(int k) { !y`e,(E
int j; C#&6p0U
while ((j = k << 1) <= size) { YMTA`T(+
if (j < size %26amp;%26amp; queue[j] j++; ^^SfIK?p
if (queue[k]>queue[j]) file://不用交换 7nz+n#
break; B,833Azi
SortUtil.swap(queue,j,k); Zg&\K~OC
k = j; d6EY'*0
} Dj+Osh
} &>l8SlC?
private void fixUp(int k) { ef;L|b%pp
while (k > 1) { N{t:%[
int j = k >> 1; i_Z5SMZ
if (queue[j]>queue[k]) Xh"iP%
break; n;-r W;ZO
SortUtil.swap(queue,j,k); _%vqBr*
k = j; +[/r^C
} NCFV
} >}{-!
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} *v ^"4
Sp,Q,Q4
} %i>e
1cBhcYv"
SortUtil： EE6|9K>
bTGK@~
package org.rut.util.algorithm; FraW6T}_
d$rUxqB.
import org.rut.util.algorithm.support.BubbleSort; o}+Uy
import org.rut.util.algorithm.support.HeapSort; 78CJ
import org.rut.util.algorithm.support.ImprovedMergeSort; }~r6>7I
import org.rut.util.algorithm.support.ImprovedQuickSort; X,+}syK
import org.rut.util.algorithm.support.InsertSort; 6QXQ<ah"
import org.rut.util.algorithm.support.MergeSort; 6.s?
import org.rut.util.algorithm.support.QuickSort; wrYQ=u#Z
import org.rut.util.algorithm.support.SelectionSort; -QPWi2:k
import org.rut.util.algorithm.support.ShellSort; u7&'3ef
5MY}(w
/** cC^C7AAq^
* @author treeroot ;kW}'&Ug
* @since 2006-2-2 F ssEs!#
* @version 1.0 #pQ"+X
*/ Df~p'N-$
public class SortUtil { (Q8?)
public final static int INSERT = 1; |p -R9A*>h
public final static int BUBBLE = 2; 36x:(-GFq
public final static int SELECTION = 3; !5%5]9'n@*
public final static int SHELL = 4; asN }
public final static int QUICK = 5; $>ZP%~O
public final static int IMPROVED_QUICK = 6; s.^9HuM
public final static int MERGE = 7; Y\e]2
public final static int IMPROVED_MERGE = 8; ,/`E|eG1G
public final static int HEAP = 9; C!{AnWf
NS4'IR=;E!
public static void sort(int[] data) { r`R~{;oT
sort(data, IMPROVED_QUICK); 2HGD{;6>v{
} p;=kH{uu
private static String[] name={ ),Ho(%T\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )_^WpyzF1
}; ^I<T+X+<
rgdQR^!l6
private static Sort[] impl=new Sort[]{ Eu/y">;v#
new InsertSort(), 72ViPWW
new BubbleSort(), Kq 4<l
new SelectionSort(), n_aNs]C9R
new ShellSort(), D5!K<G?-K
new QuickSort(), %7>AcTN~
new ImprovedQuickSort(), 3V Mh)
new MergeSort(), CQjZAv
new ImprovedMergeSort(), 4m~7 ~-h
new HeapSort() Sci4EGc
}; bV$8 >[`
3$N %iE6
public static String toString(int algorithm){ ^jha:d
return name[algorithm-1]; 9c^skNbS
} .z$Sm
3P#+) F~
public static void sort(int[] data, int algorithm) { 5`"*y iv
impl[algorithm-1].sort(data); $FQcDo|[
} 7<1fKrN?GF
AX!>l;
public static interface Sort { ,t%CK!8
public void sort(int[] data); Q6.*"`
} }or2 $\>m
L+L"$
public static void swap(int[] data, int i, int j) { `Ixs7{&jU
int temp = data; jemxky
data = data[j]; 6I&j cHH
data[j] = temp; aXIB) $1
} o'^;tLs15
} WHgV_o 8