[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; +,_c/(P
} `&g:d E(j
int i1=l; #s+Q{2s
int i2=mid+1; zM59UQU;
for(int cur=l;cur<=r;cur++){ `K?1L{p'4
if(i1==mid+1) Yx1 D)
data[cur]=temp[i2++]; Efr&12YSS
else if(i2>r) )w"0w(
data[cur]=temp[i1++]; ZvH{wt
else if(temp[i1] data[cur]=temp[i1++]; ']?=[`#NL
else =Ahw%`/&}]
data[cur]=temp[i2++]; 8p=>?wG
} B>|5xpZM12
} cU+>|'f&
[hU=mS8=^
} }1>atgq]w
\_ -DyD#3
改进后的归并排序: V2<i/6~
~zyQ('
package org.rut.util.algorithm.support; cht
,!>fmU`E4
import org.rut.util.algorithm.SortUtil; 0QoLS|voA/
kF-TG3
/** ./.=Rw
* @author treeroot 0j$OE
* @since 2006-2-2 =pp:j`B9(
* @version 1.0 `Bu9Nq
*/ AgsR-"uh
public class ImprovedMergeSort implements SortUtil.Sort { p7UTqKi
JZ K7uB,X
private static final int THRESHOLD = 10; v3^t/[e~:
%6]\^
/* *Sb2w*c>
* (non-Javadoc) Nza; O[
* qLRE}$P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *<k&#D"m
*/ }ecsGw
public void sort(int[] data) { {^wdJZ~QLK
int[] temp=new int[data.length]; .,mM%w,^O
mergeSort(data,temp,0,data.length-1); ]) n0MF)p
} IMaYEO[
UTX](:TC
private void mergeSort(int[] data, int[] temp, int l, int r) { UE7'B?
int i, j, k; sVoR?peQ
int mid = (l + r) / 2; g)cY\`&W8
if (l == r) CB({Rn
return; ohplj`X[21
if ((mid - l) >= THRESHOLD) W.$6pzB(
mergeSort(data, temp, l, mid); fq(5Lfe}
else G>0)I
insertSort(data, l, mid - l + 1); NL-_#N$
if ((r - mid) > THRESHOLD) %~\
mergeSort(data, temp, mid + 1, r); WRM$DA
else ?cxr%`E
insertSort(data, mid + 1, r - mid); B^m!t7/,
$_bZA;EMQ
for (i = l; i <= mid; i++) { fz8h]PZ
temp = data; h--45`cE
} nNs .,J)
for (j = 1; j <= r - mid; j++) { l $w/Fz
temp[r - j + 1] = data[j + mid]; cz>mhD
} cD8Ea(
int a = temp[l]; w&C1=v -h
int b = temp[r]; hiIyaWU
for (i = l, j = r, k = l; k <= r; k++) { Y"oDFo,
if (a < b) { B~rU1Y)
data[k] = temp[i++]; N"~ qoJO
a = temp; E[*0Bo]
} else { U1kh-8 :
data[k] = temp[j--]; ^k;mn-0
b = temp[j]; WP!il(Gr
} feN!_-
} oX*b<d{\N
} OF-WUa4t
nqeVV&b!
/** b?>VPuyBb
* @param data ]*GnmG:D*
* @param l \H[Yyp4
* @param i AbG&9=Ks
*/ RY9.n
private void insertSort(int[] data, int start, int len) { My],6va^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g+3Hwtl
} J7Sx!PQ
} [!Ao,rt?Vg
} =tHD 4I
} UtPwWB_YV
I<KCt2:X
堆排序： ;xI0\a7
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package org.rut.util.algorithm.support; G4O3h Y.`
}Wqtip:L
import org.rut.util.algorithm.SortUtil; s*eyTm
G-ZhGbAI7
/** xjE7DCmA
* @author treeroot 9LHa&""
* @since 2006-2-2 y%FYXwR{
* @version 1.0 `}Eh[EOHJ
*/ ys/vI/e\
public class HeapSort implements SortUtil.Sort{ @H6%G>K,
!L/tLHk+
/* (non-Javadoc) >I|<^$/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >ks3WMm
*/ b70AJe=
public void sort(int[] data) { n}f3Vrl
MaxHeap h=new MaxHeap(); 8'n#O>V@
h.init(data); d;<.;Od$`
for(int i=0;i h.remove(); ps"9;4P
System.arraycopy(h.queue,1,data,0,data.length); yZ?$8r
} +hZ] B<$
"7:u0p!
private static class MaxHeap{ x~%\y
3eJ\aVI>pE
void init(int[] data){ fG3wc l~
this.queue=new int[data.length+1]; /8:gVXZi
for(int i=0;i queue[++size]=data; \_?yzgf
fixUp(size); =#jTo|~u4o
} b#e]1Q
} aE}=^%D
4^0\dq
private int size=0; `..EQBM
wQ@Zwbx
private int[] queue; *Gf&q
]!q }|bP
public int get() { n&(3o6i'
return queue[1]; makaI0M
} 87R%ke
coW)_~U|
public void remove() { Hi$#!OU
SortUtil.swap(queue,1,size--); ^kc>m$HY
fixDown(1); JATS6-Lz`
} D\@e{.$MZ|
file://fixdown !,I7 ?O
private void fixDown(int k) { c]S+70!n
int j; Fka1]|j9
while ((j = k << 1) <= size) { jQO*oq}
if (j < size %26amp;%26amp; queue[j] j++; b$PT_!d
if (queue[k]>queue[j]) file://不用交换 q/A/3/
break; N`J:^,H
SortUtil.swap(queue,j,k); V|+ `L-
k = j; 6\%r6_.d
} !."Izz/
} ?f(pQy@V
private void fixUp(int k) { h<+PP]l=
while (k > 1) { tq2-.]Y@U
int j = k >> 1; dl7Riw-J
if (queue[j]>queue[k]) #8P#^v]H
break; SJso'6 g
SortUtil.swap(queue,j,k); 'm
k = j; 4x=V|"
} EI[e+@J
} Y:DNu9
Gw{Gt]liq
} >lUBt5gU
6 ,7/8
} aeN}hG
p~,a=
SortUtil： `V?x xq\
vo:52tCk}m
package org.rut.util.algorithm; ls8olLM>
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import org.rut.util.algorithm.support.BubbleSort; 2+c>O%L
import org.rut.util.algorithm.support.HeapSort; *+_fP|cv
import org.rut.util.algorithm.support.ImprovedMergeSort; $O;N/N:m
import org.rut.util.algorithm.support.ImprovedQuickSort; !=8L.^5c
import org.rut.util.algorithm.support.InsertSort; /\IAr,w[
import org.rut.util.algorithm.support.MergeSort; L8,H9T#e
import org.rut.util.algorithm.support.QuickSort; S!`4Bl
import org.rut.util.algorithm.support.SelectionSort; xiOv$.@q
import org.rut.util.algorithm.support.ShellSort; gb!@OZ c
l8hvq(,{
/** m'G?0^Ft
* @author treeroot y9l#;<b
* @since 2006-2-2 P#vv+]/
* @version 1.0 rf1wS*uU+
*/ l<0[ K(
public class SortUtil { Thht_3_C,f
public final static int INSERT = 1; lx A<iQia
public final static int BUBBLE = 2; ~pX(w!^
public final static int SELECTION = 3; N\CEocU
public final static int SHELL = 4; Lz#$_Am'H
public final static int QUICK = 5; <3],C)Zwc
public final static int IMPROVED_QUICK = 6; }`+^|1
public final static int MERGE = 7; } K+Q9<~u
public final static int IMPROVED_MERGE = 8; :FKYYH\
public final static int HEAP = 9; dy8In%
.g(\B
public static void sort(int[] data) { Mc#O+'](f
sort(data, IMPROVED_QUICK); n]6}yJJo
} q>(I*=7
private static String[] name={ &kXGWp
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E,ZB;
}; ^2Fs)19R
3[|:sa8?s
private static Sort[] impl=new Sort[]{ :?&WKW
new InsertSort(), }v'PY/d.
new BubbleSort(), ZH`K%h0
new SelectionSort(), ?hry=I(7r
new ShellSort(), AK*mcTr
new QuickSort(), +hyWo]nW0
new ImprovedQuickSort(), dEAAm=K,<
new MergeSort(), 0T{c:m~QXe
new ImprovedMergeSort(), `DWi4y7
new HeapSort() ]U^d1&k
}; -!bLMLIg
#<WyId(
public static String toString(int algorithm){ {g:/BFLr#
return name[algorithm-1]; |Ad6~E+aL-
} *k@0:a(>
&)"7am(S`
public static void sort(int[] data, int algorithm) { ;f ;*Q>!
impl[algorithm-1].sort(data); bHWvKv+
} kj<D4)
u_[4n
public static interface Sort { ^*?B)D=,
public void sort(int[] data); hklO:,`
} 3<UDVt@0
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public static void swap(int[] data, int i, int j) { ZimMjZ%4
int temp = data; VATXsD
data = data[j]; &"H<+>`
data[j] = temp; yOn2}Z
} >gOI]*!5
} hiK[!9r