[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; x<\5Jrqt
} Df.eb|[{
int i1=l; OZ6:u^OS]
int i2=mid+1; xt1Ug~5
for(int cur=l;cur<=r;cur++){ .njk^,N
if(i1==mid+1) FG)(,?q
data[cur]=temp[i2++]; |}isSCt
else if(i2>r) 0N`N
data[cur]=temp[i1++]; }}u16x}*n
else if(temp[i1] data[cur]=temp[i1++]; k\KI#.>
else T$*#q('1"}
data[cur]=temp[i2++]; A&D<}y/%
} Czb:nyRj
} ^"] ]rZ)
#&K?N
} Ox9M![fC
UOn:@Qn
改进后的归并排序: e3,@prr
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package org.rut.util.algorithm.support; mKuY=#RP
<ZjT4><
import org.rut.util.algorithm.SortUtil; dheobD
IZ<Et/3H
/** *>E_lWW.
* @author treeroot aW_Pv~
* @since 2006-2-2 z>z9xG'
* @version 1.0 xq&r|el
*/ [,sm]/Xlc
public class ImprovedMergeSort implements SortUtil.Sort { jr/IU=u*v
"P yG;N!W
private static final int THRESHOLD = 10; wWQt
1xjWD30
/* z-_$P)[c
* (non-Javadoc) zx7A}rs3oX
* PwU<RKAE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X8y :=k,E
*/ m2[]`Ir^@
public void sort(int[] data) { qyzH*#d=Cf
int[] temp=new int[data.length]; PFjh]/=
mergeSort(data,temp,0,data.length-1); sq{=TB{
} WOi+y
lP*p7Y '
private void mergeSort(int[] data, int[] temp, int l, int r) { &Gs/#2XQ
int i, j, k; ~rlPS#]o
int mid = (l + r) / 2; wizLA0W
if (l == r) S/dj])g
return; yM('!iG*/
if ((mid - l) >= THRESHOLD) lJdrrR)wg
mergeSort(data, temp, l, mid); ai"N;1/1O|
else 8Y [4JXUK
insertSort(data, l, mid - l + 1); v^aI+p6
if ((r - mid) > THRESHOLD) 9XmbHS[0V
mergeSort(data, temp, mid + 1, r); '&/~Sh$%
else |_OoD9,M
insertSort(data, mid + 1, r - mid); %LBf'iA
}kSP p
for (i = l; i <= mid; i++) { UJ><B"
temp = data; o:`^1
} `=%G&_3_<
for (j = 1; j <= r - mid; j++) { PLq]\y
temp[r - j + 1] = data[j + mid]; {01^xn.
} M[P1hFuna
int a = temp[l]; .rQcg.8/B
int b = temp[r]; N?IdaVLj
for (i = l, j = r, k = l; k <= r; k++) { }Z)YK}_1
if (a < b) { Q w)U
data[k] = temp[i++]; w5=<}1`St
a = temp; 1dOB|
} else { !X`cNd)0Xo
data[k] = temp[j--]; mc4|@p*
b = temp[j]; 39A|6>-?
} lib}dk
} ET(/h/r
} cZ3A~dTOR
A3|2;4t
/** ; W$.>*O
* @param data .E;}.X
* @param l Ld 0j!II(
* @param i `4wy *!]
*/ 0-p %.}GE
private void insertSort(int[] data, int start, int len) { 5t|$Yt[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); LI>Bl
} <?%49
} 5b->pc
} -@Z9h)G|
} {4*5Z[
udPLWrPF\
堆排序： {LT2^gy=
f#-\*
package org.rut.util.algorithm.support; B<ZCuVWH:
{vk%&{D0)
import org.rut.util.algorithm.SortUtil; %~P3t=r
&%tW
/** pZ]&M@Ijp
* @author treeroot <) -]'@*c
* @since 2006-2-2 5=V29
* @version 1.0 SNf~%B?`L
*/ &yI>A1
public class HeapSort implements SortUtil.Sort{ Oj8D+sC{
+_jM$?:F}
/* (non-Javadoc) 3Xy~ap>Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5sSAH
*/ O&sUPv
public void sort(int[] data) { ^!$=(jh.
MaxHeap h=new MaxHeap(); n`!6EaD
h.init(data); 8mt#S
for(int i=0;i h.remove(); %S^:5#9
System.arraycopy(h.queue,1,data,0,data.length); AC!yc(^<
} _#we1m
-s\R2_(
private static class MaxHeap{ uQKo2B0
QcX&q%*0
void init(int[] data){ wbI1~/
this.queue=new int[data.length+1]; AmJdZs|/
for(int i=0;i queue[++size]=data; J+wnrGoK
fixUp(size); `l %,4qR
} {REGoe=W%
} >h.HW
rr>6;
private int size=0; K5z<n0X ~
OTNI@jQ)
private int[] queue; @'y8* _
=CO'LyG
public int get() { j%}9tM6[
return queue[1]; M"-.D;sa1
} f1XM_
OGO\u#
public void remove() { 3QF[@8EH{
SortUtil.swap(queue,1,size--); +G+1B6S
fixDown(1); 2*] [M,L0c
} m -0EcA/
file://fixdown G-,0mo
private void fixDown(int k) { wk'&n^_br
int j; d. ZfK
while ((j = k << 1) <= size) { L-zU%`1{M
if (j < size %26amp;%26amp; queue[j] j++; 7Sh1QDYZ
if (queue[k]>queue[j]) file://不用交换 tKds|0,j|
break; CWJN{
SortUtil.swap(queue,j,k); dp4vybJ
k = j; ~_IQ:]k
} '8FHn~F
} .v-2A);I
private void fixUp(int k) { ?y__ Vrw
while (k > 1) { tI5*0
int j = k >> 1; Mb45UG#2
if (queue[j]>queue[k]) LBmXy8'T`
break; {s8g;yU5
SortUtil.swap(queue,j,k); SLp nVD:'1
k = j; D(WV k
} 3{$>-d
} NiQ Y3Nj
[ $"
} #K iqV6E
L+eK)Q
} @ZrNV*&<
Hs{x Z:
SortUtil： tu/4
o/[Ks;l
package org.rut.util.algorithm; +}Mm5^6*
*SpE XO
import org.rut.util.algorithm.support.BubbleSort; B\qy:nr j
import org.rut.util.algorithm.support.HeapSort; >/NegJh'F}
import org.rut.util.algorithm.support.ImprovedMergeSort; .~TI%&#
import org.rut.util.algorithm.support.ImprovedQuickSort; KC%&or
import org.rut.util.algorithm.support.InsertSort; CrG!8}
import org.rut.util.algorithm.support.MergeSort; J25/Iy*byG
import org.rut.util.algorithm.support.QuickSort; *pABdP+
import org.rut.util.algorithm.support.SelectionSort; Z`|\%D%
import org.rut.util.algorithm.support.ShellSort; InRcIQT
^(@]5$^Z
/** s6#e?5J
* @author treeroot px(~ZZB"
* @since 2006-2-2 Lr(JnS
* @version 1.0 ="PFCxi
*/ XqwP<5Z
public class SortUtil { .F[5{XV
public final static int INSERT = 1; t:v>W8N53
public final static int BUBBLE = 2; 2izBB,# "
public final static int SELECTION = 3; M@p<L VP
public final static int SHELL = 4; ?6L8#"=
public final static int QUICK = 5; 9e}%2,
public final static int IMPROVED_QUICK = 6; 7|"$YV'DM
public final static int MERGE = 7; JbMp /
public final static int IMPROVED_MERGE = 8; 8Qj1%Ri:U
public final static int HEAP = 9; 9[DlJ@T}
Dtyw]|L\H
public static void sort(int[] data) { 8i<]$
sort(data, IMPROVED_QUICK); c?aOX/C'
} 3JqGLR`z3
private static String[] name={ &PFq(4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zAev@+.ld
}; f zL5C2d
= C/F26=|
private static Sort[] impl=new Sort[]{ jl>wvY||
new InsertSort(), /b/ 6*&
new BubbleSort(), Og?GYe^_
new SelectionSort(), NRspi_&4J
new ShellSort(), Y{Lxo])e
new QuickSort(), !f}D*8\f
new ImprovedQuickSort(), KTAQ6k
new MergeSort(), 2 zG;91^
new ImprovedMergeSort(), =WEDQ\ c
new HeapSort() `.]oH1\
}; c0w1 N]+Ne
ps:E(\
public static String toString(int algorithm){ dxH.
return name[algorithm-1]; y(E<MRd8V
} Z|)1ftcC
{~G~=sC$
public static void sort(int[] data, int algorithm) { LlVbY=EX7
impl[algorithm-1].sort(data); _'^_9u G
} g_?Q3
)n[=)"rf
public static interface Sort { DbtkWq%
public void sort(int[] data); Vn\jUEC
} j0w@ \gO<
8:0,jnS
public static void swap(int[] data, int i, int j) { Der'45]*^
int temp = data; mX?t|:[b
data = data[j]; 7) af
data[j] = temp; JxEz1~WK &
} !DHfw-1K
} P^U.VXY}