[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; pLl(iNf]
} jY&k
int i1=l; "H2EL}3/]
int i2=mid+1; .7^c@i[
for(int cur=l;cur<=r;cur++){ \h+AXs<j
if(i1==mid+1) 87=&^.~`
data[cur]=temp[i2++]; H!c@klD
else if(i2>r) _qU4Fadgm
data[cur]=temp[i1++]; Qo>b*Ku;
else if(temp[i1] data[cur]=temp[i1++]; pD(j'[
else bkRLC_/d
data[cur]=temp[i2++]; 6=kEyJT'
} PoNi"Pv
} Ii6<b6-
65L6:}#
} eFipIn)b
MlcR"gl*
改进后的归并排序: Nv$R\'3
y+Ra4G#/}
package org.rut.util.algorithm.support; T=<@]$?
@efh{
import org.rut.util.algorithm.SortUtil; =pr`'
`K*Q5n
/** w}L]X1#sF
* @author treeroot y>:N{|
* @since 2006-2-2 "Hya6k>j
* @version 1.0 }q`ts=dlGt
*/ :1^LsLr5
public class ImprovedMergeSort implements SortUtil.Sort { ]E7F/O/.
s:?SF.
private static final int THRESHOLD = 10; FO+Zue.RS
9FoHD
/* LuNc,n%
* (non-Javadoc) i3dkYevs?
* ]"r&]qx7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y?rPlA_
*/ u6?Q3 bvI
public void sort(int[] data) { 'g6\CZw(#
int[] temp=new int[data.length]; :uP,f<=)K
mergeSort(data,temp,0,data.length-1); i=ea ?eT`
} YA''2Ii
t\?ik6
private void mergeSort(int[] data, int[] temp, int l, int r) { # Nk;4:[
int i, j, k; z[LNf.)}
int mid = (l + r) / 2; ? 8)'oMD
if (l == r) Ld\R:{M"
return; B%" d~5Y
if ((mid - l) >= THRESHOLD) ` w=>I
mergeSort(data, temp, l, mid); 1G"z<v B
else pqk?|BvpK_
insertSort(data, l, mid - l + 1); //*fSF
if ((r - mid) > THRESHOLD) C`K?7v3$m
mergeSort(data, temp, mid + 1, r); w&X<5'GM
else b $'FvZbk
insertSort(data, mid + 1, r - mid); 7OC#8,
pN!}UqfI-
for (i = l; i <= mid; i++) { #~#R-
temp = data; Diy8gt
} V\t.3vT
for (j = 1; j <= r - mid; j++) { 6{x(.=
temp[r - j + 1] = data[j + mid]; qT,Te
} kEJj=wx
int a = temp[l]; f) znTJL
int b = temp[r]; 'GB.UKlR
for (i = l, j = r, k = l; k <= r; k++) { 7_%"BVb"
if (a < b) { 0x'#_G65y
data[k] = temp[i++]; Mc=$/ o
a = temp; 5)FJ:1-
} else { ,3?Q(=j
data[k] = temp[j--]; -!q:p&c
b = temp[j]; mIurA?&7!
} Z?}dq-Vh&
} MTsM]o
} 9G9fDG#F\I
4\y/'`xm)6
/** wr5AG<%(
* @param data t=|evOz]
* @param l LwrUQ)
* @param i !HrKXy0{
*/ YX=a#%vrl
private void insertSort(int[] data, int start, int len) { C3*gn}[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |L-]fjBbF
} 1|RANy
} Gnf~u[T6
} UADFnwR[R
} j2ve^F:Q
>{N9kWY
堆排序： s1=X>'q
NYE`Kin-
package org.rut.util.algorithm.support; pv*,gSS
w,w{/T+B
import org.rut.util.algorithm.SortUtil; 1>*#%R?W
DSC$i|
/** 8JM&(Q%#
* @author treeroot K#EvFs`s;
* @since 2006-2-2 M\sN@+
* @version 1.0 D&/kCi=R
*/ s8-<m,*
public class HeapSort implements SortUtil.Sort{ V"*O=h
kgnmGuka
/* (non-Javadoc) o}W%I/s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d\p,2
*/ H$@`,{M629
public void sort(int[] data) { >SML"+>
MaxHeap h=new MaxHeap(); N"8_S0=pw
h.init(data); 9F4Dm*_<
for(int i=0;i h.remove(); }R1< 0~g
System.arraycopy(h.queue,1,data,0,data.length); 9^,Lc1"M>
} z8QAo\_I(
Qy.w=80kf
private static class MaxHeap{ %<E$,w>
/e7O$L)
void init(int[] data){ #bMuvaP~
this.queue=new int[data.length+1]; /4c\K-Z;
for(int i=0;i queue[++size]=data; ;u;#g
fixUp(size); >H'4{|
} &0NFb^8+
} 8S%52W|
fJ/e(t
private int size=0; ])L A42|
Kz>3 ic$I
private int[] queue; oX0D
E0u~i59Z
public int get() { D$bIo"
return queue[1]; @c<3b2
} RnhL< Ywu
+)j$|x~(A
public void remove() { Rn{iaM2Y<
SortUtil.swap(queue,1,size--); T'4z=Z]w
fixDown(1); aCQ?fq
} ?\$#L^;b}
file://fixdown {.QEc0-
private void fixDown(int k) { /G5d|P
int j; kB'Fkqwm
while ((j = k << 1) <= size) { uM_#
if (j < size %26amp;%26amp; queue[j] j++; Z7_m)@%;kk
if (queue[k]>queue[j]) file://不用交换 e '2F#
break; 2'_:S@
SortUtil.swap(queue,j,k); VwOW=4`6
k = j; dZi(&s
} F'B8v3
} pcT:]d[1)
private void fixUp(int k) { m9"n4a|:
while (k > 1) { L5#P[cHzz
int j = k >> 1; tZ^Ou89:rG
if (queue[j]>queue[k]) ~v]!+`_J
break; /C>wd
SortUtil.swap(queue,j,k); dHK`eS$sb
k = j; Md0sK
} *d"DA[(
} %n hm
\>CYC|
} Xlb0/T<g!
,Fi>p0bz
} N5i+3&
M@?xa/E64
SortUtil： w9,iq@
Gm(b/qDDe
package org.rut.util.algorithm; b@S Cn9
Yc,7tUz#
import org.rut.util.algorithm.support.BubbleSort; #|*F1K
import org.rut.util.algorithm.support.HeapSort; 'B@e8S)y
import org.rut.util.algorithm.support.ImprovedMergeSort; c05%iv
import org.rut.util.algorithm.support.ImprovedQuickSort; Q8DQlqHm
import org.rut.util.algorithm.support.InsertSort; rMUT_^
import org.rut.util.algorithm.support.MergeSort; U7I qST
import org.rut.util.algorithm.support.QuickSort; |7X:TfJ
import org.rut.util.algorithm.support.SelectionSort; {%IExPJ
import org.rut.util.algorithm.support.ShellSort; L+'Fs
7oq[38zB
/** ]R=,5kK3
* @author treeroot zOGU8Wg
* @since 2006-2-2 # g_Bx
* @version 1.0 jcI&w#re
*/ cIp D~0\
public class SortUtil { :%sXO
public final static int INSERT = 1; i:u1s"3~
public final static int BUBBLE = 2; WHlYo5?
public final static int SELECTION = 3; (ZY@$''
public final static int SHELL = 4; vq!_^F<
public final static int QUICK = 5; Zc!@0
public final static int IMPROVED_QUICK = 6; ' 4ER00
public final static int MERGE = 7; ^|TG$`M(w
public final static int IMPROVED_MERGE = 8; h;-yU.(w
public final static int HEAP = 9; $2u 'N:o
=IUUeFv +r
public static void sort(int[] data) { Le*.*\
sort(data, IMPROVED_QUICK); %s&ChM?8F
} C#H:-Q&
private static String[] name={ me'd6!O9-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &[At`Nw71
}; La@ +>
.58qL-iC
private static Sort[] impl=new Sort[]{ 5*0y7K/D
new InsertSort(), %/>Y/!;
new BubbleSort(), P|HKn,ar
new SelectionSort(), QjC22lW-
new ShellSort(), 3LfC{ER
new QuickSort(), o,xxh
new ImprovedQuickSort(), ^mb[j`CCt
new MergeSort(), o}<4*qlI
new ImprovedMergeSort(), ~u.T-0F
new HeapSort() ki{3IEOr}
}; ;r6jx"i
D)@YI.T
public static String toString(int algorithm){ doB
return name[algorithm-1]; -_<}$9lz
} HXoX
YOrrkbJ(
public static void sort(int[] data, int algorithm) { N |1>ooU[
impl[algorithm-1].sort(data); YhRWz=l
} W;1|+6x
XTd3|Pm
public static interface Sort { k2xHH$+{#=
public void sort(int[] data); w ~dk#=
} JMCW}bA
XK"-'
public static void swap(int[] data, int i, int j) { ?X-)J=XG
int temp = data; 5'Q|EIL
data = data[j]; \V>?Do7
data[j] = temp; &h~Xq^
} Pub0IIs
} @w>zF/