[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; i,V,0{$
} `;j@v8n$*
int i1=l; HQkK8'\LP
int i2=mid+1; 7l(GBr
for(int cur=l;cur<=r;cur++){ jw5ldC>U
if(i1==mid+1) 'G>$W+lT^
data[cur]=temp[i2++]; )kMF~S|H
else if(i2>r) 0RZ[]:(
data[cur]=temp[i1++]; Wn%b}{9Fb
else if(temp[i1] data[cur]=temp[i1++]; Cer&VMrQK
else = Ed0vw
data[cur]=temp[i2++]; mNA=<O;i)'
} ;yu#Bs
} J7;8 S
<uG6!P
} 5Z@0XI
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改进后的归并排序: ;kDUQw
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package org.rut.util.algorithm.support; rP{Jep!
v<3KxP'a
import org.rut.util.algorithm.SortUtil; =h\unQ1T
'MgYSP<
/** c/DK31K
* @author treeroot Fy 1- >~
* @since 2006-2-2 &+5ij;AD
* @version 1.0 QYg V[\&
*/ b#nI#!p'
public class ImprovedMergeSort implements SortUtil.Sort { xyD2<?dGUb
$c{fPFe-
private static final int THRESHOLD = 10; ~&<Ls
g@2KnzD
/* $GR rTC!
* (non-Javadoc) 9?iA~r|+
* 5szJ.!(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0%<OwA2d
*/ 6H1;Hl f
public void sort(int[] data) { F|jl=i
int[] temp=new int[data.length]; l*.u rG
mergeSort(data,temp,0,data.length-1); KCIya[$*
} Y&<]:)
jiejs*
private void mergeSort(int[] data, int[] temp, int l, int r) { S6g_$Q7
int i, j, k; ?$K.*])e
int mid = (l + r) / 2; 9:E:3%%
if (l == r) xtBu]I)%
return; ?W>`skQ
if ((mid - l) >= THRESHOLD) }K^v Ujl
mergeSort(data, temp, l, mid); IeZ9 "o h
else A$M8w9
insertSort(data, l, mid - l + 1); %*NED zy
if ((r - mid) > THRESHOLD) -7KoR}Ck!
mergeSort(data, temp, mid + 1, r); .?vHoNvo
else 8y']kVg
insertSort(data, mid + 1, r - mid); G?v!Uv8O
.07"I7
for (i = l; i <= mid; i++) { Aydpr_lp
temp = data; ;f~fGsH}e'
} %VGW]!QR
for (j = 1; j <= r - mid; j++) { *_Vv(H&
temp[r - j + 1] = data[j + mid]; C*}PL
} W#+f2 RR
int a = temp[l]; -2[#1S*
int b = temp[r]; eEBo:Rc9
for (i = l, j = r, k = l; k <= r; k++) { ?[uHRBR'
if (a < b) { C :An
data[k] = temp[i++]; mW$Oi++'d
a = temp; :R`e<g~4
} else { 5 JlgnxRq
data[k] = temp[j--]; mlxtey6H3
b = temp[j]; Y&1N*@YP
} 3G[|4v?[<_
} $q*a}d[Q
} F$-fj "jC
t.+)g-X
/** #mU<]O
* @param data &b`'RZe
* @param l gnGh )
* @param i wfv\xHG
*/ jEE!H/
private void insertSort(int[] data, int start, int len) { k'_f?_PBu
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h% KEg667
} aAbA)'G
} ,]@K,|pC)
} t7xJ$^p[|K
} c`/VYgcTqB
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堆排序： 2i0;b|-=
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package org.rut.util.algorithm.support; Qd~z<U l
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import org.rut.util.algorithm.SortUtil; S6}_N/;6~
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/** x|yJCs>
* @author treeroot EjFn\|VK
* @since 2006-2-2 ",&QO7_
* @version 1.0 F b?^+V]9
*/ (3K3)0fy
public class HeapSort implements SortUtil.Sort{ &l0K~7)b
_|4R^*/4
/* (non-Javadoc) HE35QH@/`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nw\C+1F
*/ /7])]vZ_
public void sort(int[] data) { Ka6u*:/
MaxHeap h=new MaxHeap(); I`(53LCqo
h.init(data); 8{=|<
for(int i=0;i h.remove(); OPzudO
System.arraycopy(h.queue,1,data,0,data.length); 4D2U,Ds
} OX'V
Y6&v&dA;
private static class MaxHeap{ 'YB[4Q /0
?Wz2J3A.2t
void init(int[] data){ 2GORGS%
this.queue=new int[data.length+1]; (c)=Do=
for(int i=0;i queue[++size]=data; 8HFCmY#
fixUp(size); ?_FL 'G
} h]h"-3
} g5y`XFY
Wlxmp['Bh
private int size=0; 5q*s_acQ
Ea&NJ]& g
private int[] queue; JRi:MWR<r
Pc*lHoVL
public int get() { YHO}z}f[!
return queue[1]; Zj!,3{jX^
} p@kRo#~l
$cIaLq
public void remove() { A"ATtid
SortUtil.swap(queue,1,size--); =y-yHRC7
fixDown(1); .SjJG67OyA
} F \ls]luN
file://fixdown ]:#=[CH
private void fixDown(int k) { J/jkb3
int j; \?]U*)B.r
while ((j = k << 1) <= size) { )2RRa^=&
if (j < size %26amp;%26amp; queue[j] j++; cz,QP'g
if (queue[k]>queue[j]) file://不用交换 ]7Du/)$
break; Cyd/HTNh<
SortUtil.swap(queue,j,k); ]}PXN1(
k = j; pHmqwB~|
} ;YR/7
} Gn=b_!
private void fixUp(int k) { 4P[MkMoC
while (k > 1) { kBhjqI*
int j = k >> 1; e2v`
if (queue[j]>queue[k]) {daX?N|V
break; #%Bt!#
SortUtil.swap(queue,j,k); ?[d4HKs
k = j; >({qgzV`
} eJTU'aX*
} z`IW[N7Z
:Bmn<2[Y;
} [:{ FR2*x
8 7(t<3V&
} {7jim
A!Cby!,
SortUtil： !Pw*p*z
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package org.rut.util.algorithm; aSvv(iV
!Ztqh Xr
import org.rut.util.algorithm.support.BubbleSort; 5PO_qr=Hx
import org.rut.util.algorithm.support.HeapSort; JyZuj>` 6
import org.rut.util.algorithm.support.ImprovedMergeSort; o *J*}y
import org.rut.util.algorithm.support.ImprovedQuickSort; #Z1-+X8P
import org.rut.util.algorithm.support.InsertSort; mA{?E9W
import org.rut.util.algorithm.support.MergeSort; udqrHR5
import org.rut.util.algorithm.support.QuickSort; TG}owG]]
import org.rut.util.algorithm.support.SelectionSort; y62f{ks_/
import org.rut.util.algorithm.support.ShellSort; ?)|}gr
<4LJ#Fx
/** z )'9[t
* @author treeroot h40;Q<D
* @since 2006-2-2 I8?
* @version 1.0 Q__CW5&'u
*/ {ogBoDS
public class SortUtil { uVUU1@
public final static int INSERT = 1; x6`mv8~9Db
public final static int BUBBLE = 2; HP.=6bJWi
public final static int SELECTION = 3; R>O_2`c
public final static int SHELL = 4; H[u9C:}9b
public final static int QUICK = 5; >O?WRCB
public final static int IMPROVED_QUICK = 6; `Y:]&w
public final static int MERGE = 7; PP$sdmo
public final static int IMPROVED_MERGE = 8; (M$0'BV0
public final static int HEAP = 9; s{@R|5
G<e+sDQ2
public static void sort(int[] data) { q13fmK(n-5
sort(data, IMPROVED_QUICK); 6?F88;L
} &N^~=y^`C'
private static String[] name={ 3_)I&RM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" oj djy#:
}; A,.X
m"9f(
private static Sort[] impl=new Sort[]{ `f;w
new InsertSort(), (U.Go/A#wE
new BubbleSort(), ;|WUbc6&g
new SelectionSort(), OM[MRZEh G
new ShellSort(), D{N8q^Cs9
new QuickSort(), GK}52,NM
new ImprovedQuickSort(), M!J7Vj?Ps
new MergeSort(), + f67y
new ImprovedMergeSort(), p[C"K0>:_F
new HeapSort() G1 "QX
}; k`m7j[A]l
+r3)\L{U
public static String toString(int algorithm){ oIE 1j?
return name[algorithm-1]; {!|4JquE_
} 3[[oAp
DzGUKJh6
public static void sort(int[] data, int algorithm) { }_'5Vb_
impl[algorithm-1].sort(data); `[sFh%:
} *)Qv;'U=rn
Z6zV 9hn
public static interface Sort { @3?>[R
public void sort(int[] data); XLn9NBT4K
} ==[=Da~
mLuNl^)3
public static void swap(int[] data, int i, int j) { =sYILe[
int temp = data; U*[E+Uq}:N
data = data[j]; l1 Kv`v\
data[j] = temp; 0$)Q@#
} PyQ.B*JJ
} `3F#k[IR