[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; 33Jd!orXU
} JVtQ,oZ
int i1=l; =#qZ3 Qz_
int i2=mid+1; &FSmqE;@^
for(int cur=l;cur<=r;cur++){ "~F3*lk#E
if(i1==mid+1) pkJ/oT
data[cur]=temp[i2++]; 57wFf-P
else if(i2>r) <aJ$lseG
data[cur]=temp[i1++]; ,`k_|//}=
else if(temp[i1] data[cur]=temp[i1++]; K]c4"JJ
else lbQQtpEKO
data[cur]=temp[i2++]; >M]6uf
} :\XI0E
} '+j<n[JLC
_AFQ>j
} 62)d22
WJ|:kuF
改进后的归并排序: f`jc#f5+'
eG5Y+iL-V
package org.rut.util.algorithm.support; Z(j{F<\jS
S}(8f!9<
import org.rut.util.algorithm.SortUtil; 6i.gyD
Mp~y0e
/** kH'p\9=
* @author treeroot y<pnp?x4
* @since 2006-2-2 c.AYxI"
* @version 1.0 Q_]d5pl
*/ 7p.>\YtoR}
public class ImprovedMergeSort implements SortUtil.Sort { "13"`!m
}pVTTs`
private static final int THRESHOLD = 10; F/p,j0S
!gF9k8\Yr$
/* ndink$
* (non-Javadoc) 5;\gJf
* #`(WUn0H?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {o0qUX>[
*/ ^Dg<Ki
public void sort(int[] data) { Y4E/?37j
int[] temp=new int[data.length]; $<nCXVqL,
mergeSort(data,temp,0,data.length-1); %@Oma
} Rx7X_A}
Kv37s0|g
private void mergeSort(int[] data, int[] temp, int l, int r) { g:7,~}_}^
int i, j, k; aZ Xmlq
int mid = (l + r) / 2; G,f-.
if (l == r) }lP;U$
return; ljC(L/I
if ((mid - l) >= THRESHOLD) RBwO+J53y
mergeSort(data, temp, l, mid); ]}Z4P-"t
else Ej=3/RBsV
insertSort(data, l, mid - l + 1); Tlq-m2]
if ((r - mid) > THRESHOLD) 'm3t|:nMU
mergeSort(data, temp, mid + 1, r); !ErH~<f%K
else 6KHN&P
insertSort(data, mid + 1, r - mid); !8 -oR6/$%
4jNG^@O
for (i = l; i <= mid; i++) { T f4tj!t-
temp = data; <q (z>*-e
} p =(@3%k
for (j = 1; j <= r - mid; j++) { a(IY\q[Wh
temp[r - j + 1] = data[j + mid]; *T`-|H*6@
} J-xS:Ha'l
int a = temp[l]; yF13Of^l./
int b = temp[r]; 7a4o1;l
for (i = l, j = r, k = l; k <= r; k++) { <IJu7t>
if (a < b) { 7y^%7U \
data[k] = temp[i++]; 0Yl4eB-
a = temp; lDc-W =X=
} else { fB1TFtAh
data[k] = temp[j--]; :s={[KBP
b = temp[j]; 1PH:\0}
} g7\,{Bw#E
} gU&%J4O
} 5%zXAQD=<
Pq9|WV#F5/
/** \f:z+F!6R
* @param data 7ZxaPkIu&%
* @param l m<rhIq
* @param i m2~&#c\
*/ Wy .IcWK
private void insertSort(int[] data, int start, int len) { &;i "P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); WWKvh
} ,Lpixnm]
} 0AK,&nbF
} 0 B@n{PvR0
} 80b;I|-T,
\1"'E@+
堆排序： 6%,C_7j
~y HU^5D
package org.rut.util.algorithm.support; DdQ;Q5|
^y!;xc$(Qs
import org.rut.util.algorithm.SortUtil; 8:=n*
+Hvc_Av''
/** P{OAV+cG
* @author treeroot T9W`?A
* @since 2006-2-2 ]z/Zq
* @version 1.0 fKH7xu!V4+
*/ v+7kU=
public class HeapSort implements SortUtil.Sort{ #:jb*d?
>Fio;cn?
/* (non-Javadoc) 54lu2gD'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XfPFo6
*/ 7?j;7.i s(
public void sort(int[] data) { d^03"t0O]
MaxHeap h=new MaxHeap(); N`@NiJ(O;
h.init(data); N;Dp~(1 J1
for(int i=0;i h.remove(); Jn:ZYqc
System.arraycopy(h.queue,1,data,0,data.length); dZ#&YG)?e
} {S/yL[S.
KWAb-yB
private static class MaxHeap{ 7ELMd{CD
{]_uMg#!
void init(int[] data){ !oPq?lW9
this.queue=new int[data.length+1]; N`iwC!
for(int i=0;i queue[++size]=data; PZxAH9 S?
fixUp(size); <+MyZM(z>
} ]i(-I <`
} L`f^y;Y.
U,#yqER'r
private int size=0; > fnh+M
x:-.+C%
private int[] queue; |-sPLU&s%
Zl 9aDg
public int get() { _Zk{!
return queue[1]; NBl+_/2'w
} )?+$x[f!*
1b=lpw1}
public void remove() { oSiMpQu08
SortUtil.swap(queue,1,size--); |4$M]Mf0
fixDown(1); E_Z{6&r
} C~fjWz' V
file://fixdown O~j> ?
private void fixDown(int k) { ojYbR<jn9
int j; JB!:JML
while ((j = k << 1) <= size) { sn7AR88M;
if (j < size %26amp;%26amp; queue[j] j++; |*Z$E$k:
if (queue[k]>queue[j]) file://不用交换 Lg8nj< TF
break; *I}`dC[
SortUtil.swap(queue,j,k); 'iLpE7
k = j; db'/`JeK b
} 4XVCHs(
} X%yO5c\l2
private void fixUp(int k) { ]7-&V-Ct*
while (k > 1) { F, U*yj
int j = k >> 1; @SCI"H%[
if (queue[j]>queue[k]) J>fQNW!{
break; UOQEk22
SortUtil.swap(queue,j,k); c/c$D;T
k = j; }Zl&]e
} 21k5I #U
} r0p w_j
YK|bXSA[
} [MuEoWrq(}
),%6V5a+E
} wFG3KzEq ~
*s@Qtgu
SortUtil： U qG .:@T
Kw#so; e
package org.rut.util.algorithm; P[s8JDqu
+P.+_7+:
import org.rut.util.algorithm.support.BubbleSort; ^C2\`jLMY
import org.rut.util.algorithm.support.HeapSort; gV&z2S~"
import org.rut.util.algorithm.support.ImprovedMergeSort; +`?Y?L^ J
import org.rut.util.algorithm.support.ImprovedQuickSort; WJI[9@^I~
import org.rut.util.algorithm.support.InsertSort; ECv)v
import org.rut.util.algorithm.support.MergeSort; !i=nSqW
import org.rut.util.algorithm.support.QuickSort; 9UvXC)R1
import org.rut.util.algorithm.support.SelectionSort; J2uZmEt
import org.rut.util.algorithm.support.ShellSort; N0#JOu}~
[+qCs7'
/** v[Kxja;
* @author treeroot g{5A4|_7
* @since 2006-2-2 C8F7bG8c
* @version 1.0 sz9L8f2
*/ CI3XzH\IX*
public class SortUtil { Z7 E
public final static int INSERT = 1; bWOS `5
public final static int BUBBLE = 2; qzb<J=FAU
public final static int SELECTION = 3; DTWD|M
public final static int SHELL = 4; _X@v/sAy
public final static int QUICK = 5; cQ9q;r`%
public final static int IMPROVED_QUICK = 6; {Zp\^/
public final static int MERGE = 7; asJ)4ema
public final static int IMPROVED_MERGE = 8; V!)O6?l
public final static int HEAP = 9; T#bu V
ZvcJK4hi
public static void sort(int[] data) { g-Pwp[!qkf
sort(data, IMPROVED_QUICK); b!M"VDjQ
} OyqNLR
private static String[] name={ .*elggM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^ns@O+Fk
}; mrX^2SR
EbqcV\Kb
private static Sort[] impl=new Sort[]{ aL\nT XakX
new InsertSort(), L~s3b
new BubbleSort(), !UFfsNiXZ
new SelectionSort(), .^b;osAU
new ShellSort(), :O5og[;b
new QuickSort(), WJ*n29^N^h
new ImprovedQuickSort(), 5xii(\lC
new MergeSort(), y\&>ZyOY
new ImprovedMergeSort(), np~~mdmRK
new HeapSort() V2N_8)s9W
}; PfkrOsV/m
LzYO$Ir:g
public static String toString(int algorithm){ >0l"P"]
return name[algorithm-1]; \W%UZs
} id$Ul?z8
?&Pg2]g<
public static void sort(int[] data, int algorithm) { `9 {mr<
impl[algorithm-1].sort(data); [e1S^pI
} u[{tb
LdB($4,
public static interface Sort { %Q!`NCe+[
public void sort(int[] data); x\QY@9
} 2.d|G`
|{,KRO0P
public static void swap(int[] data, int i, int j) { =|=.>?t6Z0
int temp = data; Hk|0HL
data = data[j]; $-On~u0g
data[j] = temp; F]9nB3:W
} x"~~l
} 0q&'(-{s1