[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; e^3D`GA
} ('Qq"cn#
int i1=l; ok0ZI>=,
int i2=mid+1; |m6rF7Q
for(int cur=l;cur<=r;cur++){ a/J Mg
if(i1==mid+1) 0nL #-`S
data[cur]=temp[i2++]; Yj*T'<e
else if(i2>r) 71Za!3+
data[cur]=temp[i1++]; pgiZA?r*<
else if(temp[i1] data[cur]=temp[i1++]; 2O*At%CzW
else LTo5v
data[cur]=temp[i2++]; F8dr-"G
} n|6G\99l+M
} Du65>O
8h }a:/
} qg=`=]j
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改进后的归并排序: U;4i&=.!
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package org.rut.util.algorithm.support; sve} ent
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import org.rut.util.algorithm.SortUtil; +])<}S!M
A&p@iE*/
/** U5TkgHN{y
* @author treeroot tpEy-"D&
* @since 2006-2-2 Hg<aU*o;
* @version 1.0 7)5G 1
*/ _h5d~
public class ImprovedMergeSort implements SortUtil.Sort { S{N4[U?V>
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private static final int THRESHOLD = 10; C?>d$G8
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/* cu foP&
* (non-Javadoc) Knqv|jJVx1
* JVkuSIR>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *?d\Zcj85[
*/ q~ ZUtF
public void sort(int[] data) { >r7PK45.K
int[] temp=new int[data.length]; ?d%{-
mergeSort(data,temp,0,data.length-1); =X^a
} E;{CoL
r7g@(K
private void mergeSort(int[] data, int[] temp, int l, int r) { gaz",kK<
int i, j, k; hnB`+!
int mid = (l + r) / 2; xvl{o
if (l == r) {<@ud0A:\
return; .\T!oSb4[
if ((mid - l) >= THRESHOLD) W_E^+Wl@
mergeSort(data, temp, l, mid); l0`bseN<
else 0m]QQGvJ{
insertSort(data, l, mid - l + 1); F~fBr
if ((r - mid) > THRESHOLD) T9&{s-3*
mergeSort(data, temp, mid + 1, r); }T(=tfv@
else ~!~i_L\V
insertSort(data, mid + 1, r - mid); u&uFXOc'
&g&,~Y/z;
for (i = l; i <= mid; i++) { KJ32L
temp = data; Q"D
} j0~am,yZ
for (j = 1; j <= r - mid; j++) { jT$J~MpHh
temp[r - j + 1] = data[j + mid]; } % Ie
} 89^g$ ac
int a = temp[l]; YW6a?f^!
int b = temp[r]; @ Do.Wgt
for (i = l, j = r, k = l; k <= r; k++) { O50<h O]l
if (a < b) { _b&26!gl
data[k] = temp[i++]; qpjZ-[UC
a = temp; f3G:J<cL
} else { {[tmz;C
data[k] = temp[j--]; yP# Y:s
b = temp[j]; .U=x2txb
} zps=~|
} /7\q#qIm:
} ]r0j
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/** YcX"Z~O6j=
* @param data TMY. z
* @param l X"d"a={]
* @param i y3b"'-%
*/ m4oj1h_4
private void insertSort(int[] data, int start, int len) { tmq?h%O>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }:c~5whN
} 4V4S5V
} B-w`mcqp$
} u9KT_` )
} '_4apyq|
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堆排序： /huh}&NNu
M^Z=~512g
package org.rut.util.algorithm.support; !KOa'Ic$V
e,p*R?Y{[
import org.rut.util.algorithm.SortUtil; z"yW):X
mOh?cjOi
/** aWJ BYw6{L
* @author treeroot !ITM:%
* @since 2006-2-2 c}n66qJF5
* @version 1.0 OYt_i'Q
*/ 4hxP`!<
public class HeapSort implements SortUtil.Sort{ S-o)d
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/* (non-Javadoc) qx1Js3%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j>;1jzr2}
*/ -ak.wwx\
public void sort(int[] data) { FWW@t1)
MaxHeap h=new MaxHeap(); /iM1
h.init(data); G\MeJSt*
for(int i=0;i h.remove(); K;"oK
System.arraycopy(h.queue,1,data,0,data.length); 0LL65[
} HP_h!pvx
%La7);SeY
private static class MaxHeap{ 7glf?oE
^`lrKk
void init(int[] data){ }JST(d&
this.queue=new int[data.length+1]; TA/hj>rV
for(int i=0;i queue[++size]=data; b3[[ Ah-
fixUp(size); [Z2[Iy
} j0+D99{R
} e#k rr
1)h<)
private int size=0; KJOb1MM
f/8&-L
private int[] queue; @]#[TbNo
0aY\(@
public int get() { cq?,v?m
return queue[1]; IFew3!{\
} qF$y p>|#
QOUyD;0IW
public void remove() { !2HF|x$
SortUtil.swap(queue,1,size--); M0lJyzJ
fixDown(1); BC_<1 c
} R\3v=PR[
file://fixdown ;}f {o^]'
private void fixDown(int k) { |-{e!&
int j; bws}'#-*
while ((j = k << 1) <= size) { t^KQv~
if (j < size %26amp;%26amp; queue[j] j++; iR9duP+
if (queue[k]>queue[j]) file://不用交换 xg, 9~f[
break; ob/<;SrU<
SortUtil.swap(queue,j,k); @.a59kP8X
k = j; J`0dF<<{[y
} ZDzG8E0Sq
} ]?T^tJ
private void fixUp(int k) { Hpz1Iy@
while (k > 1) { ZG1TRF "
int j = k >> 1; 6l2O>V
if (queue[j]>queue[k]) QQN6\(;-
break; Wd!Z`,R
SortUtil.swap(queue,j,k); +ug2p;<B
k = j; k=kkF"
} =s*c(>
} )K]p^lO
J5jI/P
} 6p&2A
(z)#}TC
} &F#eYEuy
p|nPu*R-\
SortUtil： "{E%Y*
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package org.rut.util.algorithm; f ]_ki
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import org.rut.util.algorithm.support.BubbleSort; U&
import org.rut.util.algorithm.support.HeapSort; ._j?1Fw`
import org.rut.util.algorithm.support.ImprovedMergeSort; |P& \C8h
import org.rut.util.algorithm.support.ImprovedQuickSort; DAf@-~c
import org.rut.util.algorithm.support.InsertSort; Q.jThP`p
import org.rut.util.algorithm.support.MergeSort; -wx~*
import org.rut.util.algorithm.support.QuickSort; :%AEwRZ
import org.rut.util.algorithm.support.SelectionSort; C:sgT6
import org.rut.util.algorithm.support.ShellSort; %wru)
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/** tMP"9JE,
* @author treeroot Oh10X.)i
* @since 2006-2-2 -&1P2m/46
* @version 1.0 YR/I<m`]}
*/ QX}JQ<8
public class SortUtil { (U$;0`
public final static int INSERT = 1; /%7&De6Xg
public final static int BUBBLE = 2; 7D>_<)%d=
public final static int SELECTION = 3; s{7bu|0
public final static int SHELL = 4; P"}"q ![
public final static int QUICK = 5; V>obMr^5
public final static int IMPROVED_QUICK = 6; u' kG(<0Y
public final static int MERGE = 7; B0Z>di:
public final static int IMPROVED_MERGE = 8; AFBWiuwI3
public final static int HEAP = 9; fD\Fq'29{
J[uH@3v
public static void sort(int[] data) { N}#"o
sort(data, IMPROVED_QUICK); icIWv
} +3XaAk
private static String[] name={ ^yl}/OD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /%jX=S.5h<
}; ;K>'Gl
H{i|?a)
private static Sort[] impl=new Sort[]{ U}Puq5[ ?
new InsertSort(), pZ*%zt]-a
new BubbleSort(), h:G>w`X
new SelectionSort(), >L "+8N6
new ShellSort(), nTtEv~a_n
new QuickSort(), :EYUBtTj
new ImprovedQuickSort(), n!SHExBp
new MergeSort(), '`<Fys&:
new ImprovedMergeSort(), #1*7eANfr
new HeapSort() O<|pw
}; 5wAKA`p"z
! N!pvK;
public static String toString(int algorithm){ r: >RH,
return name[algorithm-1]; mqsAYzG
} ^[bFGKE
='+I dn#5
public static void sort(int[] data, int algorithm) { !"RRw&0M
impl[algorithm-1].sort(data); [742s]j
} Nr*X1lJ6
w?8\9\ ;?
public static interface Sort { 2v@B7r4}
public void sort(int[] data); ] `q]n
} kMLJa=]$
tEo-Mj5:
public static void swap(int[] data, int i, int j) { NMhpKno
int temp = data; rx9y^E5T`;
data = data[j]; 2T?Y
data[j] = temp; T fIOS]
} [Pjitw/?
} v#s*I/kw