[JAVA]用Java实现的各种排序

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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; !"Q8KV
} fWBI}~e
int i1=l; qt#a_F*rV
int i2=mid+1; bof{R{3q
for(int cur=l;cur<=r;cur++){ L,F )l2
if(i1==mid+1) 1K;i/
data[cur]=temp[i2++]; 2Rp'ju~O)/
else if(i2>r) Q3vWwP;t~
data[cur]=temp[i1++]; bh8IF,@a
else if(temp[i1] data[cur]=temp[i1++]; `[+nz rLkO
else -;?5<>zZ
data[cur]=temp[i2++]; "16-K%}
} ]bq<vI%
} Q.Kr;64G
s)e; c<(/
} oR=^NEJv
E&/D%}Wl
改进后的归并排序: ,cvLvN8
xwH+Q7O&l
package org.rut.util.algorithm.support; s1!_zf_
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import org.rut.util.algorithm.SortUtil; #@m*yJg<
R;X8%'
/** <N%8"o
* @author treeroot *6)u5
* @since 2006-2-2 O/IW.t
* @version 1.0 d8b'Gjwtw
*/ =#i#IF42?
public class ImprovedMergeSort implements SortUtil.Sort { ><X!~by
W"rX$D[Le
private static final int THRESHOLD = 10; >8V;:(nt
#=f ]"uM<
/* b&g9A{t
* (non-Javadoc) F6T@YSP
* gz[Ng> D+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vpY|S2w)Bp
*/ [H#I:d-+\
public void sort(int[] data) { tIb?23K0
int[] temp=new int[data.length]; U/M(4H3>H
mergeSort(data,temp,0,data.length-1); hnM|=[wM
} UcMe("U
W|T"'M_
private void mergeSort(int[] data, int[] temp, int l, int r) { eb:mp/
int i, j, k; 2I:vie
int mid = (l + r) / 2; AQ-P3`bCb
if (l == r) %2<chq
return; Dd*T5A?
if ((mid - l) >= THRESHOLD) :&`Yz
mergeSort(data, temp, l, mid); y^zVb\"4
else [^W4%S
insertSort(data, l, mid - l + 1); 0x0.[1mB
if ((r - mid) > THRESHOLD) M6!kn~
mergeSort(data, temp, mid + 1, r); 4i[3|hv'
else <27B*C M
insertSort(data, mid + 1, r - mid); )^)VyI`O
amGQ!$] %#
for (i = l; i <= mid; i++) { "8Pxf=
temp = data; 9U58#
} +=MO6}5T
for (j = 1; j <= r - mid; j++) { 6.~(oepu
temp[r - j + 1] = data[j + mid]; &I?1(t~hT
} ]k{cPK
int a = temp[l]; f+s'.z%
int b = temp[r]; quf,ZK5
for (i = l, j = r, k = l; k <= r; k++) { -z0,IYG }
if (a < b) { YjS|Ht->
data[k] = temp[i++]; n<lU;
a = temp; iTbmD
} else { +F 6KGK[
data[k] = temp[j--]; >S{1=N@Ev=
b = temp[j]; *NDLGdQqz
} .Rc&EO
} X!,Ngmw.
} lyZof_/*
'y}A3RqN
/** yN~=3b>
* @param data *kL1r w6
* @param l Qkqn~>
* @param i `M4;aN
*/ uzZ|w+3O
private void insertSort(int[] data, int start, int len) { BD=;4SLT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :":W(O
} Z#>k:v
} HK&F'\'}
} 1 EC0wX
} |ki#MtCp
#)>>f
堆排序： pPh_p@3I
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package org.rut.util.algorithm.support; +#Ov9b
])~*)I~Y
import org.rut.util.algorithm.SortUtil; |EU}&k2
W .Hv2r3
/** ^n]tf9{I
* @author treeroot qg.[M*
* @since 2006-2-2 _E'M(.B<
* @version 1.0 oi"Bf7{
*/ do=VPqy
public class HeapSort implements SortUtil.Sort{ z^}T= $&
%7 J
/* (non-Javadoc) Fl*@@jQ8cV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kmov(V
*/ 7Zu!s]t
public void sort(int[] data) { ~~5kAY-
MaxHeap h=new MaxHeap(); 4eaC18?
h.init(data); <,rjU*"
for(int i=0;i h.remove(); L1rov
System.arraycopy(h.queue,1,data,0,data.length); b>2u>4
} /~ V"v"7E
"_#%W oo
private static class MaxHeap{ v S%+
YuPgsJ[m
void init(int[] data){ gscsB4<
this.queue=new int[data.length+1]; L9r 3jz
for(int i=0;i queue[++size]=data; 31b-r[B{%
fixUp(size); ZibHT:n
} NoYu"57\
} &Puu Xz<
lc5NC;JR
private int size=0; PCaa_ 2
jsez$m%vs
private int[] queue; 89 fT?tT
a~XNRAh
public int get() { O _1}LS!
return queue[1]; ~s5Sk#.z5
} *$l8H[
O]2h=M@q.
public void remove() { gWWy!H
SortUtil.swap(queue,1,size--); 1km=9[;w'
fixDown(1); YKM(qh2
} !J2Lp
file://fixdown s#qq% @
private void fixDown(int k) { ]e"NJkcm
int j; 7<1Y%|x`
while ((j = k << 1) <= size) { BC4u,4S
if (j < size %26amp;%26amp; queue[j] j++; E&K8hY%5
if (queue[k]>queue[j]) file://不用交换 t"BpaA^gO
break; %5z88-\
SortUtil.swap(queue,j,k); ,2kWj7H%7
k = j; )m)>k` 0
} j:sac*6m
} \h0e09& I
private void fixUp(int k) { uP*>-s'm
while (k > 1) { "= UP&=
int j = k >> 1; c|O5Vp}
if (queue[j]>queue[k]) #o^E1cI
break; Viw{<VH=
SortUtil.swap(queue,j,k); .OWIlT4K
k = j; NKI&n]EO
} {_ 1q`5o
} UHCx}LGe
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} 6"=e+V@
mV4} -
} z&t6,0q`5
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SortUtil： x208^=F\\
f'.yM*
package org.rut.util.algorithm; }3i@5ctQ
)1]C%)zn
import org.rut.util.algorithm.support.BubbleSort; ,Y5+UzE@
import org.rut.util.algorithm.support.HeapSort; v~xG*e
import org.rut.util.algorithm.support.ImprovedMergeSort; C<7J5
import org.rut.util.algorithm.support.ImprovedQuickSort; '%~zu]f'
import org.rut.util.algorithm.support.InsertSort; #IXQ;2%E
import org.rut.util.algorithm.support.MergeSort; ca`=dwe>
import org.rut.util.algorithm.support.QuickSort; :c.i Z
import org.rut.util.algorithm.support.SelectionSort; O;zW'*c+
import org.rut.util.algorithm.support.ShellSort; -0Q!:5EC
P$oa6`%l
/** ; 6zu!
* @author treeroot TfxKvol'
* @since 2006-2-2 "?il07+w%
* @version 1.0 oJR!0nQ
*/ P&SR;{:y
public class SortUtil { < xV!vN
public final static int INSERT = 1; jjbw.n+1
public final static int BUBBLE = 2; I2/wu(~>
public final static int SELECTION = 3; g 08 `=g
public final static int SHELL = 4; .9E`x>C
public final static int QUICK = 5; cCeD3CuRA%
public final static int IMPROVED_QUICK = 6; jQdfFR
public final static int MERGE = 7; }i[jJb`bY
public final static int IMPROVED_MERGE = 8; eQeNlCG
public final static int HEAP = 9; :L?zk"0C
*X>rvAd3
public static void sort(int[] data) { ^:q(ksssY
sort(data, IMPROVED_QUICK); XNl!(2x'pb
} &0lNj@/
private static String[] name={ f[v??^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~Ch`A@=5
}; LRI_s>7
rm cy-}e
private static Sort[] impl=new Sort[]{ ;L)}blN.
new InsertSort(), [|>.iH X
new BubbleSort(), n}+ DO6J
new SelectionSort(), /U`"|3
new ShellSort(), +`4|,K7'
new QuickSort(), '2vlfQ@8a~
new ImprovedQuickSort(), E=B9FIx~<
new MergeSort(), vxm`[s|QC
new ImprovedMergeSort(), &sKYO<6K}
new HeapSort() 1TVTP2&Rd
}; #eaey+~
IS!+J.2
public static String toString(int algorithm){ W,<Vr2J[
return name[algorithm-1]; 1zM`g_(#
} Jk~T.p?tF
V- vVb
public static void sort(int[] data, int algorithm) { $`Ou*
impl[algorithm-1].sort(data); }cP3i
} Gq{v)iN
1idEm*3&(
public static interface Sort { qle\c[UM5
public void sort(int[] data); Uarb [4OZ
} -8o8lz
|9Y9pked8
public static void swap(int[] data, int i, int j) { $""[( d?0
int temp = data; %d>Ktf
data = data[j]; }C'z$i( y
data[j] = temp; 15zL,yo
} saV3<zgx
} m$o|s1t