[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,].88H
} 2u_=i$xW
int i1=l; gYbvCs8O!
int i2=mid+1; _5n2'\] H`
for(int cur=l;cur<=r;cur++){ FEhBhv|m
if(i1==mid+1) l2W+VBn6
data[cur]=temp[i2++]; }` `oojz
else if(i2>r) PT,*KYF_O"
data[cur]=temp[i1++]; zx"EAF{
else if(temp[i1] data[cur]=temp[i1++]; Bi fI.2|
else D_<B^3w)
data[cur]=temp[i2++]; < q(i(%
} yD3vq}U!
} }mp`!7?>O
l]DRJ
} oIOeX1$V
B> i^w1
改进后的归并排序: J%ws-A?6rN
Hh](n<Bs
package org.rut.util.algorithm.support; kKbbsB
H4v%$R;K
import org.rut.util.algorithm.SortUtil; o+OX^F0
*tZ3?X[b
/** |U1u:=[
* @author treeroot BSy4 d>
* @since 2006-2-2 4V@0L
* @version 1.0 GPAC0K^p
*/ vr47PM2al
public class ImprovedMergeSort implements SortUtil.Sort { (.oDxs()I
FLPN#1
private static final int THRESHOLD = 10; myXGMN$i
*URY8a`bO
/* eWYet2!Q
* (non-Javadoc) Brg0:5H
* wAR:GO'n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .wm<l:
*/ ZPM7R3%V)z
public void sort(int[] data) { T5pc%%q
int[] temp=new int[data.length]; <5]_u:
mergeSort(data,temp,0,data.length-1); 4mBM5Tv
} (ce)A,;
&C,]c#-+
private void mergeSort(int[] data, int[] temp, int l, int r) { z}5'TV=^
int i, j, k; ZKI` ;
int mid = (l + r) / 2; Ca"i<[8
if (l == r) !Y^$rF-+
return; &e[Lb:Uk)
if ((mid - l) >= THRESHOLD) .*EP$pc
mergeSort(data, temp, l, mid); (#je0ES
else .q]K:}9!\
insertSort(data, l, mid - l + 1); FGwgSrXL7
if ((r - mid) > THRESHOLD) ,V4pFQzL
mergeSort(data, temp, mid + 1, r); t?uw^nV3E
else &U.y):
insertSort(data, mid + 1, r - mid); H-5f!>)
Rx%kAt2X
for (i = l; i <= mid; i++) { &#q%#M:
temp = data; ~|KMxY(:
} bg4VHT7?>)
for (j = 1; j <= r - mid; j++) { jAt65a
temp[r - j + 1] = data[j + mid]; `b@"GOr
} `~=Is.V[
int a = temp[l]; ^kB9 I8u
int b = temp[r]; 0Z%<H\Z
for (i = l, j = r, k = l; k <= r; k++) { S!}pL8OE
if (a < b) { T?__
data[k] = temp[i++]; . 55aY~We
a = temp; Yic'p0< ?V
} else { -IV-"-6(
data[k] = temp[j--]; AQ.q?'vE)
b = temp[j]; 0XIrEwm@%
} gAi}"};
} r:^`005
} lgAE`Os
W\DJXM]b
/** )^^}!U#|e
* @param data )./'RE+(k
* @param l A,ao2)
* @param i Q([g1?F9*
*/ QPF[D7\
private void insertSort(int[] data, int start, int len) { |4Q><6"G
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ',RR*{I
} 8J9o$Se
} {24Pv#ZG#^
} 'Uo:b<
} P#Ikj&l
s3T6"%S`
堆排序： \@n/L{}(@
U`'w{~"D%
package org.rut.util.algorithm.support; w@f_TG"Vt
zjJyc?
import org.rut.util.algorithm.SortUtil; }W%}_UT
U(qM( E
/** z<P#djx
* @author treeroot xhMdn3~U
* @since 2006-2-2 2I39fZa
* @version 1.0 ?Z7C0u#wd
*/ 8c$IsvJg
public class HeapSort implements SortUtil.Sort{ *JOv
q`;URkjk
/* (non-Javadoc) 4]8PF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1$2Rs-J
*/ CUw 9aH
public void sort(int[] data) { 1r w>gR
MaxHeap h=new MaxHeap(); qOa-@MN
h.init(data); oq<#
for(int i=0;i h.remove(); Bp6Evi
System.arraycopy(h.queue,1,data,0,data.length); -XY]WWlq
} (/Y gcT
&q` =xF
private static class MaxHeap{ QnOa?0HL/
p|bpE F=U
void init(int[] data){ ]g+(#x_.?
this.queue=new int[data.length+1]; IweQB}d
for(int i=0;i queue[++size]=data; qx? lCz a"
fixUp(size); en~(XE1
} eZJOI1wNp
} O "h+i>|l
#QDV_ziE5
private int size=0; XJ NKM~
CC87<>V
private int[] queue; nocH~bAf2
!kKKJ~,;
public int get() { )DLK<10
return queue[1]; y! 1NS
} rC*nZ*
(c*Dvpo1
public void remove() { YvHn~gNPhs
SortUtil.swap(queue,1,size--); )*JTxMQ
fixDown(1); ;~q)^.K3
} O@Kr}8^,
file://fixdown -jw=Iyv
private void fixDown(int k) { f!Ie
int j; ,^,J[F
while ((j = k << 1) <= size) { 5Q'R5]?h
if (j < size %26amp;%26amp; queue[j] j++; =UP)b9*h
if (queue[k]>queue[j]) file://不用交换 4* hmeS"
break; 3a S>U #
SortUtil.swap(queue,j,k); ffhD+-gTU
k = j; Zj^H3h
} e O}mZN
} MU^Z*r
private void fixUp(int k) { wIiT :o
while (k > 1) { V)Xcn'h
int j = k >> 1; pV+;/y_
if (queue[j]>queue[k]) Kj>_XaFCg!
break; 8ksDXf`.
SortUtil.swap(queue,j,k); d16PY_
k = j; \d;Ow8%d/
} }R'oAE}$
} yI;Qb7|^
0nd<6S+fs
} MLb\:Ihy
TP^0`L
} {gn[ &\
jHZ<Gc
SortUtil： E0PBdiD6hs
$7*Ml)H!9
package org.rut.util.algorithm; vtT:c.~d
m1hf[cg
import org.rut.util.algorithm.support.BubbleSort; *\>2DUu\`
import org.rut.util.algorithm.support.HeapSort; , $=V
import org.rut.util.algorithm.support.ImprovedMergeSort; ,5*4%*n\
import org.rut.util.algorithm.support.ImprovedQuickSort; tpctz~ .
import org.rut.util.algorithm.support.InsertSort; &_6:TqJ
import org.rut.util.algorithm.support.MergeSort; ] ge-b\
import org.rut.util.algorithm.support.QuickSort; N!3f1d7RQ
import org.rut.util.algorithm.support.SelectionSort; \3/9lE|gh
import org.rut.util.algorithm.support.ShellSort; Pg36'aTe%j
/P%:u0fX,
/** >JMKEHl.q
* @author treeroot S'e2~-p0F
* @since 2006-2-2 I|:j~EY
* @version 1.0 aU!UY(
*/ G~Sfpf
public class SortUtil { re*/JkDq3K
public final static int INSERT = 1; ;D7jE+
public final static int BUBBLE = 2; A!~o?ej
public final static int SELECTION = 3; ^pP 14y*go
public final static int SHELL = 4; @wPmx*SF
public final static int QUICK = 5; zkOgL9 (_8
public final static int IMPROVED_QUICK = 6; =EJ"edw]%0
public final static int MERGE = 7; \4[Ta,;t
public final static int IMPROVED_MERGE = 8; G!IQ<FuY
public final static int HEAP = 9; U8mu<)
pf_ /jR
public static void sort(int[] data) { 2^aTW`>L
sort(data, IMPROVED_QUICK); A0ToX) |C
} !ZZAI_N
private static String[] name={ SOL=3hfb^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~83P09\T%
}; 1DP)6{x
@6SSk=9_S
private static Sort[] impl=new Sort[]{ ik*_,51Zj
new InsertSort(), @n(In$
new BubbleSort(), ^q`*!B9@
new SelectionSort(), Vmc)or*#
new ShellSort(), $%-?S]6)
new QuickSort(), Ymu=G3-
new ImprovedQuickSort(), 11sW$@xs 9
new MergeSort(), u/f&Wq/
new ImprovedMergeSort(), =.c"&,c?L
new HeapSort() ~e<<aTwN
}; ||=Duk
Ln|${c
public static String toString(int algorithm){ "q.uiz+1:
return name[algorithm-1]; di5_5_$`o
} %U7B0-
hz%IxI9
public static void sort(int[] data, int algorithm) { ap~Iz
impl[algorithm-1].sort(data); _1'Pb/1
} ;GSJnV
*&]l
public static interface Sort { \t@`]QzG:
public void sort(int[] data); UJ[a&b
} $EIkk= z
i`$rzXcS
public static void swap(int[] data, int i, int j) { /(aX>_7jg
int temp = data; A2d2V**Z
data = data[j]; gOM`I+CwT
data[j] = temp; pS;dvZ
} ise}> A!t
} ,0bM*qob