[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; %_L~"E 2e
} O'~>AC5{
int i1=l; INRP@Cp1
int i2=mid+1; PiVp(; rtQ
for(int cur=l;cur<=r;cur++){ KKRj#m(:!
if(i1==mid+1) 7%sx["%@
data[cur]=temp[i2++]; )F\^-laMuK
else if(i2>r) oB8LJZ;
data[cur]=temp[i1++]; ml1My1
else if(temp[i1] data[cur]=temp[i1++]; mD_sf_2>
else ?X'l&k>
data[cur]=temp[i2++]; NtDxwzj
} dsG:DS`q
} hcT5>w[
"+Kp8n6
} 6 9s%
XE`u
改进后的归并排序: <Em|0hth
}08Sv=XM
package org.rut.util.algorithm.support; 68()2v4X
G2s2i2&6E
import org.rut.util.algorithm.SortUtil; 6[3>[ej:x
j\\uW)ibG
/** Vwpy/5Hmp
* @author treeroot n48%Uwa,
* @since 2006-2-2 ):st-I!o
* @version 1.0 WxJV zHtR
*/ El^V[s'3
public class ImprovedMergeSort implements SortUtil.Sort { EG J/r
>*1YL)DBT\
private static final int THRESHOLD = 10; QD;:!$Du
k0IztFyj:R
/* dk_! ~Z
* (non-Javadoc) wl0i3)e:
* r<1.'F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /y3Lc.-
*/ }PX8#C_P
public void sort(int[] data) { M6lNdK
int[] temp=new int[data.length]; @^t1SPp
mergeSort(data,temp,0,data.length-1); bE%*ZB
} 1UN$eb7
>l=;6QL
private void mergeSort(int[] data, int[] temp, int l, int r) { | E\u
int i, j, k; vxk~(3]<)
int mid = (l + r) / 2; C[[:/X(c
if (l == r) 3a?dNwM@
return; .|/VD'xV"
if ((mid - l) >= THRESHOLD) [u;>b?[{
mergeSort(data, temp, l, mid); o(@^V!}V
else 2SXy)m !
insertSort(data, l, mid - l + 1); t $u.
if ((r - mid) > THRESHOLD) Io4Ss1="
mergeSort(data, temp, mid + 1, r); uC5W1LyI
else p&lT! 5P!A
insertSort(data, mid + 1, r - mid); PcEE@W9
jP )VTk_
for (i = l; i <= mid; i++) { \os"j
temp = data; **~1`_7~*
} P] Xl
for (j = 1; j <= r - mid; j++) { o>y@1%aU
temp[r - j + 1] = data[j + mid]; dG%{&W9
} )dF`L
int a = temp[l]; FJIo]p
int b = temp[r]; MmW]U24s
for (i = l, j = r, k = l; k <= r; k++) { Eikt,
if (a < b) { Jzj>=jWX@
data[k] = temp[i++]; c{\x<AwO
a = temp; ;*>':-4
} else { 7D=gAMPvJ
data[k] = temp[j--]; im@c||
b = temp[j]; >]/aG!
} c#T0n !}
} S*(ns<L
} uE&2M>2
F>"B7:P1:Q
/** nT%<!/}!
* @param data s%@HchZ 1
* @param l AxiCpAS;J
* @param i tybM3VA
*/ RO8]R2A
private void insertSort(int[] data, int start, int len) { ;s w3MRJ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'ExTnv ~
} pTE.,~-J^j
} B0ZLGB
} vf h*`G$
} ]3~X!(O
1*]@1DJt
堆排序： F5YHc$3^
=f=,YcRn+
package org.rut.util.algorithm.support; 3NlG,e'T2
'9Xw_1B
import org.rut.util.algorithm.SortUtil; OYY_@'D
QUi=ZD1
/** jHM}({)-
* @author treeroot 1w|u ^[~u\
* @since 2006-2-2 W4rh7e4
* @version 1.0 NqZR*/BOz
*/ oU)HxV
public class HeapSort implements SortUtil.Sort{ XO"BEj<x
ziG]BZ
/* (non-Javadoc) ~MZ.988:<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y[`%j\=
*/ m^Rf6O^
public void sort(int[] data) { k4BiH5\hA
MaxHeap h=new MaxHeap(); \++#adN:K
h.init(data); KL+,[M@ F
for(int i=0;i h.remove(); i`vgD<}
System.arraycopy(h.queue,1,data,0,data.length); nCSXvd/
} R\>=}7
.6y(ox|LL
private static class MaxHeap{ x#TWZ;
m|k:wuzqK
void init(int[] data){ :t6.J
this.queue=new int[data.length+1]; /rmm@
for(int i=0;i queue[++size]=data; !_LRuqQ?"
fixUp(size); D(^ |'1
} ~e R6[;
} 5wGc"JHm
bcE%EQ
private int size=0; \&1Di\eL
q@&.)sLPgO
private int[] queue; UZ3oc[#D=]
=]hPX
public int get() { =U<6TP]{
return queue[1]; m/>z}d05h
} A]mXV4RmI
jBnvu@K"
public void remove() { x#&%lJT
SortUtil.swap(queue,1,size--); 7Jvb6V<R
fixDown(1); PU{7s
} ]QK@zb}x
file://fixdown 9lCZi?
private void fixDown(int k) { 1 Ll<^P
int j; {;Ispx0m
while ((j = k << 1) <= size) { h?2:'Vu]
if (j < size %26amp;%26amp; queue[j] j++; K)8N8Js(
if (queue[k]>queue[j]) file://不用交换 F` gQ[
break; nLv"ON~
SortUtil.swap(queue,j,k); yct^AN|%
k = j; /Jw65 e
} 4e55
} H:&|q+K=#
private void fixUp(int k) { >XiTl;UU
while (k > 1) { ~pj/_@S@x
int j = k >> 1; lhLE)B2a2
if (queue[j]>queue[k]) K/+w6d
break; %b(non*
SortUtil.swap(queue,j,k); 9t^Q_[hG
k = j; p?+*R@O
} 97n@HL1
} iPoDesp
^GN|}W
} 6Y(Vs>
^qD@qJ
} C!r9+z)<
@x z?^20N
SortUtil： d %Z+.O
@fwk
package org.rut.util.algorithm; !O~5<tA[#1
^@0-E@ {c
import org.rut.util.algorithm.support.BubbleSort; D/= AU
import org.rut.util.algorithm.support.HeapSort; auP6\kpMe
import org.rut.util.algorithm.support.ImprovedMergeSort; yhi6RDS
import org.rut.util.algorithm.support.ImprovedQuickSort; NiTLQ"~e
import org.rut.util.algorithm.support.InsertSort; 3d0Yq
import org.rut.util.algorithm.support.MergeSort; q[w.[]
import org.rut.util.algorithm.support.QuickSort; dJ0qg_ U&
import org.rut.util.algorithm.support.SelectionSort; ;+/[<bvd"
import org.rut.util.algorithm.support.ShellSort; E6NrBPm
NFQR
/** JZ
* @author treeroot %7*Y@k-)o
* @since 2006-2-2 ?m$7)@p
* @version 1.0 p&%M=SzN
*/ 6s"Erq5q
public class SortUtil { j4B|ktf
public final static int INSERT = 1; #n_uELE
public final static int BUBBLE = 2; 5c~OG6COx
public final static int SELECTION = 3; 1li1&
public final static int SHELL = 4; `RG_FS"v
public final static int QUICK = 5; r ]cC4%in
public final static int IMPROVED_QUICK = 6; mfNYN4Um6
public final static int MERGE = 7; )@]Y1r4U
public final static int IMPROVED_MERGE = 8; *&vySyt
public final static int HEAP = 9; {,|J?>{
nPj+mg
public static void sort(int[] data) { S}rW=hO
sort(data, IMPROVED_QUICK); !PfIe94{`
} Hlw0ia
private static String[] name={ 9x~qcH%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jR^>xp;
}; 79>8tOuo
\gE3wmSJ,
private static Sort[] impl=new Sort[]{ kS$HIOt823
new InsertSort(), MO{6B#(<F
new BubbleSort(), k-(hJ}N
new SelectionSort(), I<I?ks
new ShellSort(), Qhd~4
new QuickSort(), z.9 #AN=&[
new ImprovedQuickSort(), S:UtmS+K
new MergeSort(), 7b_Ihv
new ImprovedMergeSort(), J!@$lyH
new HeapSort() |xTf:@hgHf
}; l/BE~gdl
\@kY2,I V
public static String toString(int algorithm){ wNuS'P_(:T
return name[algorithm-1]; ?^F#}>C
} h<wF;g,
XB &-k<C
public static void sort(int[] data, int algorithm) { )p MZ5|+X
impl[algorithm-1].sort(data); VK+#!!Ha
} z^/aJ@gQ
w@Pc7$EP
public static interface Sort { 5@+8*Fdk
public void sort(int[] data); UN&b]vg
} f.gkGwNk
-4JdKO
public static void swap(int[] data, int i, int j) { 9Q".166
int temp = data; >sE5zj|V
data = data[j]; N~-N Q
data[j] = temp; %^=fjJGV{~
} Fc;)p88[
} `A\ !Gn?