[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; j!c[$;
} [E_+fT
int i1=l; N_jCx*.G
int i2=mid+1; qK ,mG{
for(int cur=l;cur<=r;cur++){ {,r7dxI)`
if(i1==mid+1) JM8s]&
data[cur]=temp[i2++]; dt NHj/\
else if(i2>r) d\nBc6
data[cur]=temp[i1++]; D}Jhg`9
else if(temp[i1] data[cur]=temp[i1++]; IbRy~
else k^A Yg!~
data[cur]=temp[i2++]; cE x$cZRMI
} i?^Cc\gH
} |.D_[QI
?H9F"B$a
} G-FTyIP>'
;0}8vs
改进后的归并排序: *,9.Bx*
%SV"iXxY
package org.rut.util.algorithm.support; %I]?xe6
+cAN4
import org.rut.util.algorithm.SortUtil; T7W*S-IW
,WF)GS|7V
/** _#c^z;!
* @author treeroot 4uip!@$K
* @since 2006-2-2 5- Q`v/w;
* @version 1.0 %]9 <a
*/ %9|=\# G
public class ImprovedMergeSort implements SortUtil.Sort { A@/DGrZX
}K=TB}yY
private static final int THRESHOLD = 10; J90q\_dY.
Zp|LCE"
/* tMaJ; 4
* (non-Javadoc) m,nV,}@J
* Ty]/F+{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UV>^[/^O
*/ k fx<T
public void sort(int[] data) { p9<OXeY
int[] temp=new int[data.length]; LkFXUt?
mergeSort(data,temp,0,data.length-1); g{8R+
} XezO_V
\K 01F
private void mergeSort(int[] data, int[] temp, int l, int r) { g j`"|
int i, j, k; dG{`Jk
int mid = (l + r) / 2; pk'@!|g%=
if (l == r) ki6`d?
return; "m]"%MU78
if ((mid - l) >= THRESHOLD) t"1'B!4
mergeSort(data, temp, l, mid); $;*YdZ`q
else l79jd%/m
insertSort(data, l, mid - l + 1); q>&F%;q1]
if ((r - mid) > THRESHOLD) ?r@euZ&
mergeSort(data, temp, mid + 1, r); ypXKw7f(
else )>,b>7
insertSort(data, mid + 1, r - mid); 4ei .-
F2yM2Ldx
for (i = l; i <= mid; i++) { >Uvtsj#
temp = data; ,eRl Z3T
} Yt*M|0bL
for (j = 1; j <= r - mid; j++) { RIX0AE
temp[r - j + 1] = data[j + mid]; iUh_rX9A"
} Ms?V1
int a = temp[l]; S=lA^#'UdX
int b = temp[r]; . iq.H
for (i = l, j = r, k = l; k <= r; k++) { [Dq7mqr$
if (a < b) { e4NT
data[k] = temp[i++]; :o$ R@l
a = temp; @u/<^j3Q
} else { 1G|Q~%cv
data[k] = temp[j--]; XzQ=8r>l
b = temp[j]; @.kv",[{[
} Xj$J}A@
} |aN0|O2
} fDq, )~D
kETA3(h'
/** bi!4I<E>k
* @param data <Q=ES,M
* @param l ^e8R43w:!
* @param i 5h[u2&;G
*/ p)tac*US
private void insertSort(int[] data, int start, int len) { ZP?k|sEH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c}mJ6Pt
} :LVM'c62c>
} &+`l $h
} oO @6c%
} GT%V,OJ
MvY0?!v
堆排序： U=XaI%ZM)
X5wS6v)#(
package org.rut.util.algorithm.support; ?9vBn
uGl0z79
import org.rut.util.algorithm.SortUtil; *wp'`3y}
s~/]nz]"J
/** aJMh>
* @author treeroot W _b$E =
* @since 2006-2-2 (uOW5,e7
* @version 1.0 [CPZj*|b
*/ }p t5.'l
public class HeapSort implements SortUtil.Sort{ 8)rv.'A((E
(Wq9YDD@
/* (non-Javadoc) |[K7oa~#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K@n.$g
*/ NOx&`OU+
public void sort(int[] data) { .EloBP
MaxHeap h=new MaxHeap(); 5?;'26iC
h.init(data); +nuv?QB/
for(int i=0;i h.remove(); V-=$:J"J'\
System.arraycopy(h.queue,1,data,0,data.length); 5F2+o#*h
} vkq?z~GA
zwU8iVDe
private static class MaxHeap{ (53dl(L?
*"fg@B5
void init(int[] data){ RW(AjDM
this.queue=new int[data.length+1]; ![Ip)X OG
for(int i=0;i queue[++size]=data; U_}$QW0'
fixUp(size); 3!Qt_,
} ts;_T..L
} ";s5It
sQJM 4'8f
private int size=0; c;U\nC<Y
*~!xeL
private int[] queue; +ZRsa`'^
hQL9 Zl~
public int get() { puqLXDjA/
return queue[1]; X8Sk
} MruWt*
$+Pv fQ
public void remove() { a m<R!(
SortUtil.swap(queue,1,size--); =~=/ dq
fixDown(1); $elrX-(vL
} R8'yQ#FVy
file://fixdown {Y/|7Cl0
private void fixDown(int k) { eU%5CVH.v
int j; u/.srK!K
while ((j = k << 1) <= size) { qh7o;x~,
if (j < size %26amp;%26amp; queue[j] j++; c6c^9*,V
if (queue[k]>queue[j]) file://不用交换 ''5%5(Y.r
break; ~Y'e1w$`
SortUtil.swap(queue,j,k); m6;Xo}^w
k = j; ~|uCZ.;o
} 'R,d?ikY
} ZC2C`S\xr
private void fixUp(int k) { 6km u'vw
while (k > 1) { fykN\b
int j = k >> 1; x *qef_Hu
if (queue[j]>queue[k]) xh-[]Jz(
break; H<1?<1^
SortUtil.swap(queue,j,k); #Ejly2C,
k = j; $--PA$H27
} 21o_9=[^
} E*w 2yWR
/t>o -
} EPa3Yb?BGb
|nicvg@
} (VOKa
mlVv3mVyR<
SortUtil： 8fe"#^"sR
chd${ j
package org.rut.util.algorithm; }MIH{CMH
!r LHPg
import org.rut.util.algorithm.support.BubbleSort; Hzj*X}X#K
import org.rut.util.algorithm.support.HeapSort; $AXz/fGV
import org.rut.util.algorithm.support.ImprovedMergeSort; %x927I>
import org.rut.util.algorithm.support.ImprovedQuickSort; O]Kb~jkd
import org.rut.util.algorithm.support.InsertSort; }TF<C!]
import org.rut.util.algorithm.support.MergeSort; 6U&Uyd)
import org.rut.util.algorithm.support.QuickSort; P);Xke
import org.rut.util.algorithm.support.SelectionSort; )K?GAj]Pq
import org.rut.util.algorithm.support.ShellSort; ! 4oIx`
5t<]|-i!
/** #>- rKv.A
* @author treeroot 6VE >$`m
* @since 2006-2-2 ##s!-.T
* @version 1.0 6sZRR{'
*/ xc/|#TC8?
public class SortUtil { <GNOT"z
public final static int INSERT = 1; l?R_wu,Q
public final static int BUBBLE = 2; 0l:5hD,)F
public final static int SELECTION = 3; eXOFAd]>u
public final static int SHELL = 4; X~DXx/9
public final static int QUICK = 5; P9>C!0 -x
public final static int IMPROVED_QUICK = 6; W@ Z=1y
public final static int MERGE = 7; X*JD
public final static int IMPROVED_MERGE = 8; Hug{9Hr3.
public final static int HEAP = 9; 7S1!|*/ I
kyjH~mK4
public static void sort(int[] data) { yBe/UFp+
sort(data, IMPROVED_QUICK); _bd#C
} PR'FSTg
private static String[] name={ }2r08,m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?Tl@e
}; xw-q)u
&*yve}su
private static Sort[] impl=new Sort[]{ }fCM_w
new InsertSort(), K%gFD?{^q
new BubbleSort(), b>7ts_b
new SelectionSort(), ua[\npz5
new ShellSort(), V8sY7QK=
new QuickSort(), q@sH@-z4]
new ImprovedQuickSort(), MMAC,4
new MergeSort(), {Psj#.qP1
new ImprovedMergeSort(), -J30g\
new HeapSort() y?JbJ
}; yJL"uleRT
Y{yr-E #~M
public static String toString(int algorithm){ 2G-? P"4l@
return name[algorithm-1]; \l2 s^7G_
} ye%F <:O7
e)xWQ=,C
public static void sort(int[] data, int algorithm) { 2)A D'
impl[algorithm-1].sort(data); S|J8:-
} bVx]r[
]03ZrZ! PM
public static interface Sort { cR&xl^BJ
public void sort(int[] data); KwHOV$lD;
} $G_<YVXcG
:acQK=fe
public static void swap(int[] data, int i, int j) { d0=nAZZ
int temp = data; o{he)r6)_
data = data[j]; VM,ZEt3Vy
data[j] = temp; Za6oYM_z
} Hj\~sR$L-
} aOHCr>po,