[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; /5L\:eX%
} ?mK&Slh.
int i1=l; 3pW4Ul@e
int i2=mid+1; Qmo}esb'(
for(int cur=l;cur<=r;cur++){ d2gYBqag
if(i1==mid+1) rMjb,2*rC7
data[cur]=temp[i2++]; HYT~AO-!
else if(i2>r) $- %um
data[cur]=temp[i1++]; EN/t5d
else if(temp[i1] data[cur]=temp[i1++]; dy5}Jn%L
else kn$_X4^?
data[cur]=temp[i2++]; HRM-r~2:-]
} -gt?5H h
} oyk&]'>
.b<W*4{j0H
} :wg=H
0#uB[N
改进后的归并排序: Qhc;Zl
J#i7'9g
package org.rut.util.algorithm.support; xHaz*w1|
P*|=Z>%[0
import org.rut.util.algorithm.SortUtil; , .;0xyc
srO>l ;Vf/
/** NR8`nc1~
* @author treeroot P3=#<Q.
* @since 2006-2-2 lP]Y^Gz
* @version 1.0 G'w!Aws
*/ I''n1v?N
public class ImprovedMergeSort implements SortUtil.Sort { 3)?WSOsL:
|V{ Q
private static final int THRESHOLD = 10; vp!F6ZwO
+'olC^?5 }
/* )YAU|sCAi$
* (non-Javadoc) h2Th)&Fb>
* &^HVuYa.0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0pEM0M
*/ (&v|,.c^)1
public void sort(int[] data) { ly6zz|c5
int[] temp=new int[data.length]; 7_)38
mergeSort(data,temp,0,data.length-1); MY c&
} (F.w?f4B3
q%$p56\?3
private void mergeSort(int[] data, int[] temp, int l, int r) { E7@Gpu,o
int i, j, k; ~UO}PI`C
int mid = (l + r) / 2; :@-yK8q's
if (l == r) !P^Mo> "
return; \>lA2^Ef
if ((mid - l) >= THRESHOLD) =l*xM/S
mergeSort(data, temp, l, mid); VzHrKI
else H6jt[
insertSort(data, l, mid - l + 1); x lqP%
if ((r - mid) > THRESHOLD) 2@2d |
mergeSort(data, temp, mid + 1, r); Dg0rVV6c
else ;i?2^xe^~c
insertSort(data, mid + 1, r - mid); /JC1o&z_T
m&xVlS
for (i = l; i <= mid; i++) { ]Z6? m
temp = data; S`FIb'J
} v;;3 K*c>
for (j = 1; j <= r - mid; j++) { ZOa|lB (,
temp[r - j + 1] = data[j + mid]; iJ8Z^=>
} )mBYW}} T
int a = temp[l]; `G`R|B
int b = temp[r]; leH7II9
for (i = l, j = r, k = l; k <= r; k++) { VR&dy|5BO
if (a < b) { l*&N<Yu
data[k] = temp[i++]; "qR, V9\
a = temp; S!z3$@o
} else { J+ S]Qoz
data[k] = temp[j--]; rQ]JM
b = temp[j]; F4z#u2~TC
} .o/uA
} HZWt>f
} 6z6\xkr
NjEi.]L*fX
/** xYYa%PhIC
* @param data ?0*[ L
* @param l "P(obk
* @param i $rr@3H+
*/ m26YAcip}
private void insertSort(int[] data, int start, int len) { +>!nqp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \$Wpt#V
} '=Lpch2J
} *kqC^2t
} t? 6 et1~
} sw$uZ$$~#
L{8_6s(:
堆排序： LOfw #+]d
<Ohi+a%6
package org.rut.util.algorithm.support; r#)1/`h
$,, PF/N8c
import org.rut.util.algorithm.SortUtil; F5/,S
; xp-MK
/** >|kD(}Axf
* @author treeroot `kQosQV
* @since 2006-2-2 457{9k
* @version 1.0 81s }4
*/ YT(Eh3ID
public class HeapSort implements SortUtil.Sort{ C]5 kQ1Og
kV?fie<\)
/* (non-Javadoc) Bz-jy.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $>O~7Nfst7
*/ !R\FCAW[x
public void sort(int[] data) { lbIPtu
MaxHeap h=new MaxHeap(); XJ3sqcS
h.init(data); .|R4E
for(int i=0;i h.remove(); N\|z{vn
System.arraycopy(h.queue,1,data,0,data.length); ]T]{VB
} ^&1O:G*"
|H_WY#
private static class MaxHeap{ n^ fUKi*;
YuknZ&Q
void init(int[] data){ /R=MX>JA;
this.queue=new int[data.length+1]; ?%Nh4+3N>
for(int i=0;i queue[++size]=data; [tfB*m5
fixUp(size); OmBz'sp:
} -NN=(p!<
} (iir,Ks2C
k"&o)*d
private int size=0; TK\3mrEI
' :B;!3a0d
private int[] queue; +c<iVc|
r\ft{Z<P
public int get() { /ugyUpyg
return queue[1]; w($a'&d`0
} TMPk)N1Ka
!KK`+ 9/
public void remove() { Y 2ANt w@
SortUtil.swap(queue,1,size--); I)FFh%m<}a
fixDown(1); /^nIOAeE
} OR~ui[w
file://fixdown fy"}# 2
private void fixDown(int k) { C){Q;`M-<
int j; Sf*v#?
while ((j = k << 1) <= size) { 13#ff
if (j < size %26amp;%26amp; queue[j] j++; ;n(f?RO3X
if (queue[k]>queue[j]) file://不用交换 Fk3(( n=
break; P%e7c,
SortUtil.swap(queue,j,k); = N*Jis
k = j; * CR#D}F
} N?vb^?
} 5<ruN11G
private void fixUp(int k) { k B]`py!
while (k > 1) { L7 }nmP>aR
int j = k >> 1; ; o_0~l=-/
if (queue[j]>queue[k]) Hm'"I!jyO
break; %w65)BFQ
SortUtil.swap(queue,j,k); ye$_=KARP
k = j; kpn|C 9r
} ANu>*
} [h;I)ug[o(
\~%+)a%%
} .@OQ$D<
Pa3-0dUr
} !9/`PcNIpy
QNMZR
SortUtil： <>\|hno}
`Fr ,,Q81\
package org.rut.util.algorithm; -GPBX?
iG6]Pr|;e
import org.rut.util.algorithm.support.BubbleSort; {HEWU<5
import org.rut.util.algorithm.support.HeapSort; zT,@PIC(
import org.rut.util.algorithm.support.ImprovedMergeSort; WC~;t4
import org.rut.util.algorithm.support.ImprovedQuickSort; d0I s|Gs
import org.rut.util.algorithm.support.InsertSort; S^pb9~
import org.rut.util.algorithm.support.MergeSort; 4};@QFT*
import org.rut.util.algorithm.support.QuickSort; `X@\Zv=}
import org.rut.util.algorithm.support.SelectionSort; d|NW&PG
import org.rut.util.algorithm.support.ShellSort; 1}=D
wCLniCt
/** z U[pn)pe
* @author treeroot mgx|5Otg
* @since 2006-2-2 h76j|1gI
* @version 1.0 06.%9R{
*/ Cb{D[
public class SortUtil { qK%N{ro[{?
public final static int INSERT = 1; u9S*2'
public final static int BUBBLE = 2; }NC$Ce
public final static int SELECTION = 3; Y0,{fw<
public final static int SHELL = 4; (v/L
public final static int QUICK = 5; *J[P#y
public final static int IMPROVED_QUICK = 6; a[~[lk=7
public final static int MERGE = 7; &EV%g6
public final static int IMPROVED_MERGE = 8; s|<n7 =J
public final static int HEAP = 9; *g+ZXB
h8UhrD<:
public static void sort(int[] data) { Ro2V-6/
sort(data, IMPROVED_QUICK); -"nkC
} @QmN= X5
private static String[] name={ PdO"e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cF15Mm2
}; TzaeE
5CK\Z'c~!
private static Sort[] impl=new Sort[]{ wGLMLbj5
new InsertSort(), G>vK$W$f N
new BubbleSort(), _WWC8?6U
new SelectionSort(), 3 twA5)v
new ShellSort(), zy$jTqDH
new QuickSort(), p4z4[=-:
new ImprovedQuickSort(), 6t;;Fz
new MergeSort(), X:Z3R0
new ImprovedMergeSort(), 4Px|:7~wT8
new HeapSort() i.6b%
}; u|IS7>Sm
+C!GV.q[
public static String toString(int algorithm){ |E6_TZ#=
return name[algorithm-1]; kfas4mkc
} y$7Ys:R~
%_s)Gw&sq
public static void sort(int[] data, int algorithm) { <MG&3L.[
impl[algorithm-1].sort(data); u $-&Im<
} 2EM6k|l5
[G8EX3
public static interface Sort { M4)U [v
public void sort(int[] data); 9RlJf=Z#H
} afX|R
:|V650/
public static void swap(int[] data, int i, int j) { ?QffSSj[s
int temp = data; b(N\R_IQ~
data = data[j]; Zm*d)</>
data[j] = temp; CJN~p]\
} bh5D}w
} =|AYT6z,