[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; [8sYEh
} fc*>ky.v
int i1=l; 1#,4P1"
int i2=mid+1; rxgSQ+G_
for(int cur=l;cur<=r;cur++){ $lf/Mg_H
if(i1==mid+1) t2(X
data[cur]=temp[i2++]; Zpkd8@g@
else if(i2>r) =eU=\td^
data[cur]=temp[i1++]; vYm:V:7Y2
else if(temp[i1] data[cur]=temp[i1++]; "@eGgQ
else F%|P#CaB
data[cur]=temp[i2++]; W-s6+DY
} N<rq}^qo
} h8`On/Ur_8
M=liG+d
} K'Ywv@
*HR pbe2
改进后的归并排序: ?K[Y"*y2
j9>[^t3U
package org.rut.util.algorithm.support; Unb2D4&'
z1Ieva]
import org.rut.util.algorithm.SortUtil; <!Cjq,Sk7
h$'6."I
/** Ra|P5
* @author treeroot l!x+K&
* @since 2006-2-2 _HHvL=
* @version 1.0 #kM|!U=
*/ 6T$=(I <4
public class ImprovedMergeSort implements SortUtil.Sort { ,yltt+e
AyO%,6p[
private static final int THRESHOLD = 10; f-|?He4O]
(NLw#)?
/* D;0>-
* (non-Javadoc) {O2=K#J
* @\y{q;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O]PM L`
*/ uMw6b=/U
public void sort(int[] data) { Q&]|W Xv
int[] temp=new int[data.length]; 47Z3nl?
mergeSort(data,temp,0,data.length-1); (2#Xa,pb
} 'M~`IN`
D5c 8sB
private void mergeSort(int[] data, int[] temp, int l, int r) { u @Ze@N%
int i, j, k; S=r0tao,!v
int mid = (l + r) / 2; TxPFl7,r
if (l == r) A,_O=hA2I
return; ; R+>}6
if ((mid - l) >= THRESHOLD) D;> 7y}\
mergeSort(data, temp, l, mid); x;7l>uR
else Qf( A
insertSort(data, l, mid - l + 1); T5u71C_wmt
if ((r - mid) > THRESHOLD) 1- s(v)cxh
mergeSort(data, temp, mid + 1, r); ^5E9p@d"J
else $~b6H]"9
insertSort(data, mid + 1, r - mid); i`gM> q&
<4Gy~?
for (i = l; i <= mid; i++) { Nf)YG!
temp = data; v=@y7P1
} r5~W/eE
for (j = 1; j <= r - mid; j++) { @bA5uY!
temp[r - j + 1] = data[j + mid]; $@'BB=i
} X3}eq|r9
int a = temp[l]; cOV9g)7^O
int b = temp[r]; M)oKtiav*
for (i = l, j = r, k = l; k <= r; k++) { 'd$RNqe
if (a < b) { h_(M#gG
data[k] = temp[i++]; Wz'!stcp
a = temp; We{@0K/O
} else { MMFg{8
data[k] = temp[j--]; G*N[tw
b = temp[j]; `Qo37B2
} t\ oud{Cv
} |)!f".`
} z+yq%O
cZBXH*-M!
/** kAEq+{h
* @param data 33DP?nI}
* @param l 5=C?,1F$A
* @param i !Sn|!:N4
*/ ?{ExBZNa
private void insertSort(int[] data, int start, int len) { CO`)XB6W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )7*'r@
} cK1^jH<|
} $~6MR_Yq
} 6HK1?
} )=Z;H"_
s0' haU
堆排序： 32 i6j
5\pS8<RJ;
package org.rut.util.algorithm.support; Xeq9Vs zg
U}jGr=tu
import org.rut.util.algorithm.SortUtil; R0INpF';
Z}$sY>E
/** |`:cB
* @author treeroot 62HA[cr&)
* @since 2006-2-2 06]3+s{{
* @version 1.0 E'aOHSAg
*/ X\Bl? F
public class HeapSort implements SortUtil.Sort{ q2E{o)9
3cghg._
/* (non-Javadoc) fc3nQp7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1k6asz^T
*/ OY{fxBb
public void sort(int[] data) { /.0K#J:
MaxHeap h=new MaxHeap(); xJ$uoy3+
h.init(data); D@La-K*5
for(int i=0;i h.remove(); N] sbI)Z@
System.arraycopy(h.queue,1,data,0,data.length); &AJ bx
} h,Hr0^?
:o!Kz`J
private static class MaxHeap{ X0 |U?Ib?
/#Pm'i>B
void init(int[] data){ "?zWCH
this.queue=new int[data.length+1]; zjr($?
for(int i=0;i queue[++size]=data; eV*QUjS~
fixUp(size); rtS cQ
} 67rY+u%
} &b#d4p6&l
U6/7EOW,
private int size=0; Jt5V{9:('
<=n;5hv:
private int[] queue; bpBn3f`?*
Z(6.e8fK
public int get() { tAN!LI+w
return queue[1]; c]Epg)E
} f DXK<v)
#`3Q4
public void remove() { ^}~Q(ji7
SortUtil.swap(queue,1,size--); hOB<6Tm[
fixDown(1); n'mrLZw
} Ij(<(y{?Q1
file://fixdown hhPQ.{]>
private void fixDown(int k) { G{: B'08
int j; c)#7T<>*'
while ((j = k << 1) <= size) { l!:bNMd
if (j < size %26amp;%26amp; queue[j] j++; ~}b0zL
if (queue[k]>queue[j]) file://不用交换 G06;x
break; j:cu;6|
SortUtil.swap(queue,j,k); t/t6o&
k = j; ;t+p2i
} *}C%z(
} @2"3RmYLo
private void fixUp(int k) { 5Yv*f:
while (k > 1) { D 1.59mHsD
int j = k >> 1; Nmx\qJUR(
if (queue[j]>queue[k]) ` 1+*-g^r
break; (m2%7f.I
SortUtil.swap(queue,j,k); 1SjVj9{:
k = j; q,ie)`
} <2]h$53y!
} o`n8Fk}i
!f(A9V
} 7kV$O(4
oA5Qk3b:
} 5b rM..
Kc[^Pu
SortUtil： OF<:BaRs/
d"n>Q Tn\
package org.rut.util.algorithm; PV,Z@qm@^
PFpFqJ)Cs"
import org.rut.util.algorithm.support.BubbleSort; dsw^$R}
import org.rut.util.algorithm.support.HeapSort; ?M'CTz}<\
import org.rut.util.algorithm.support.ImprovedMergeSort; |[n\'Xy;{
import org.rut.util.algorithm.support.ImprovedQuickSort; --y,ky#
import org.rut.util.algorithm.support.InsertSort; Pa{DB?P
import org.rut.util.algorithm.support.MergeSort; JYNnzgd
import org.rut.util.algorithm.support.QuickSort; Y&bYaq
import org.rut.util.algorithm.support.SelectionSort; !PoyM[Z"f
import org.rut.util.algorithm.support.ShellSort; ^ q ba<#e
iWeUsS%zpV
/** 5)f 'wVe
* @author treeroot LNJKf6:
* @since 2006-2-2 UZt3Ua&J
* @version 1.0 &c-V QP(
*/ vVtkB$]L
public class SortUtil { WrwbLlE
public final static int INSERT = 1; mIf)=RW
public final static int BUBBLE = 2; BsXF'x<U*
public final static int SELECTION = 3; 4'D^>z!c
public final static int SHELL = 4; c),UO^EqV
public final static int QUICK = 5; pRjEuOc
public final static int IMPROVED_QUICK = 6; ;s,1/ kA
public final static int MERGE = 7; Fb<'L5}i
public final static int IMPROVED_MERGE = 8; 0(c,J$I]Z!
public final static int HEAP = 9; &kdW(;`
S".|j$
public static void sort(int[] data) { <P1nfH
sort(data, IMPROVED_QUICK); R5b,/>^'A
} pqs!kSJV
private static String[] name={ 4?@5JpC9VA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x3'ANw6E
}; 2Ax(q&`9
dKPXs-5
private static Sort[] impl=new Sort[]{ "8a V~]~Dj
new InsertSort(), R{brf6,
new BubbleSort(), ]z7pa^
new SelectionSort(), 0o7o;eN
new ShellSort(), ZWyf.VJ
new QuickSort(), ]gHrqi%
new ImprovedQuickSort(), dj084q7
new MergeSort(), H)TKk%`7
new ImprovedMergeSort(), "=]'"'B:
new HeapSort() 0KExB{K
}; )]Zdaw)X
w@WtW8 p^
public static String toString(int algorithm){ w`boQ_Ir
return name[algorithm-1]; Y_$!XIJ4
} lz0dt<8eP
8B6(SQp%
public static void sort(int[] data, int algorithm) { U{EcV%C2
impl[algorithm-1].sort(data); -"Kjn`8
} g NE"z
uUaDesz~=
public static interface Sort { ax _v+v %
public void sort(int[] data); dn~k_J=p
} W"/,<xHuh
#lFsgb
public static void swap(int[] data, int i, int j) { 1^hG}#6_
int temp = data; ~]%re9jGW
data = data[j]; rr1,Ijh{D
data[j] = temp; F'<XB~&o
} 7zQGuGo(
} l66 QgPA