[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; ;B(;2.<"J
} j_hjCQ
int i1=l; 2 e)
int i2=mid+1; gZ=)qT]Pj
for(int cur=l;cur<=r;cur++){ ;wfH^2HxE)
if(i1==mid+1) 3$;J0{&[i
data[cur]=temp[i2++]; ud5x$`
else if(i2>r) r*xq(\v
data[cur]=temp[i1++]; 9 4 "f
else if(temp[i1] data[cur]=temp[i1++]; l8eT{!4
else zC[i <'h!T
data[cur]=temp[i2++]; sY&rbJ(P
} Idt@Hk5<&
} 9.^-us1
U. NeK{
} CdE2w?1
nvw NjN
改进后的归并排序: dV'6m@C
TZ)(ZKX*R
package org.rut.util.algorithm.support; l@(t^68OD
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import org.rut.util.algorithm.SortUtil; _ak.G=
PsacXZNs\N
/** \t[ hg
* @author treeroot }kpfJLjY
* @since 2006-2-2 }x>}:"P;W
* @version 1.0 !x+MVJ]
*/ `W6:=H
public class ImprovedMergeSort implements SortUtil.Sort { <#:Ebofsn
_Jt_2o%G
private static final int THRESHOLD = 10; ]KfghRUH
"87O4 #$
/* a>#d=.
* (non-Javadoc) =lw4 H_
* 9_I[o.q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Tey,N^=ek
*/ Q5T(;u6
public void sort(int[] data) { Nu>sp,|A
int[] temp=new int[data.length]; +F#=`+V
mergeSort(data,temp,0,data.length-1); 2X qPZ]2g
} 17?NR\Q
N4[B:n
private void mergeSort(int[] data, int[] temp, int l, int r) { yL^M~lws
int i, j, k; >^2ZM
int mid = (l + r) / 2; AycA:<
if (l == r) Y0R\u\b
return; v)X[gt tf
if ((mid - l) >= THRESHOLD) k 2 mkOb
mergeSort(data, temp, l, mid); '` BjRg57]
else +Y_Q?/M@8
insertSort(data, l, mid - l + 1); y$+!%y*
if ((r - mid) > THRESHOLD) )m$1al
mergeSort(data, temp, mid + 1, r); /1s9;'I
else 3Y.d&Nz
insertSort(data, mid + 1, r - mid); "H/2r]?GT
[M,27
for (i = l; i <= mid; i++) { w yuJSB
temp = data; Iqe=#hUFe!
} 0jl:Yzo&\
for (j = 1; j <= r - mid; j++) { RBMMXJj
temp[r - j + 1] = data[j + mid]; N?Z+zN&P
} U~JG1#z6
int a = temp[l]; >n@>h$]
int b = temp[r]; 3M`hn4)K
for (i = l, j = r, k = l; k <= r; k++) { 7N-CtQnv
if (a < b) { *)}Ap4[
data[k] = temp[i++]; dT*f-W
a = temp; 8 RzF].)
} else { k}+MvGq
data[k] = temp[j--]; |TNiKy
b = temp[j]; &Nj:XX;X
} Gx~"iM
} N7Z(lI|a;
} .j+2x[`l
^Y*`D_-G
/** f6(9wz$Trt
* @param data O4'kS @
* @param l ?[*@T2Ck
* @param i m,kvEQ3
*/ 8xeun~e"vS
private void insertSort(int[] data, int start, int len) { *R9mgv[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); X7imUy'.
} .lNnY8<
} umHs"d
} GT1 X
} !<['iM
||"":K
堆排序： gn4g 43
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package org.rut.util.algorithm.support; pXh^M{.
nFf\tf%8
import org.rut.util.algorithm.SortUtil; p0:&7,+a,
4u{E D(
/** eF gb6dSh
* @author treeroot 0YsN82IDD
* @since 2006-2-2 Xoa<r9
* @version 1.0 qNuv?.7
*/ 2C 8L\
public class HeapSort implements SortUtil.Sort{ eL]w' }\
=":V WHf
/* (non-Javadoc) =."WvBKg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iu:p&h
*/ iA{chQBr
public void sort(int[] data) { p1`'1`.3
MaxHeap h=new MaxHeap(); gen3"\Og{
h.init(data); 7p"~:1hU
for(int i=0;i h.remove(); 6m;wO r
System.arraycopy(h.queue,1,data,0,data.length); m%[2x#
} +-KRp1qq
<}x|@u
private static class MaxHeap{ MIMPJXT#.
)MX1776kU
void init(int[] data){ ?-6x]l=]
this.queue=new int[data.length+1]; O}\"$n>
for(int i=0;i queue[++size]=data; X G@>1/
fixUp(size); pN^G[
} aGzdur
} VHXR)}
Z({`9+/>u
private int size=0; m= beB\=
_QtQPK\+
private int[] queue; A?{aUQB~|
t9-\x
public int get() { Fy+7{=?^F
return queue[1]; 3!L<=X
} E)Zd{9A5)
Aaw:B?4)
public void remove() { fU){]YP
SortUtil.swap(queue,1,size--); {u[K ^G
fixDown(1); _R!!4Hp<Q
} .AQ3zpy5B
file://fixdown y[7xK}`_
private void fixDown(int k) { `'k's]Y
int j; 5F_:[H =
while ((j = k << 1) <= size) { kod_ 1LD
if (j < size %26amp;%26amp; queue[j] j++; t BXsWY{
if (queue[k]>queue[j]) file://不用交换 YaE['a
break; @SMy0:c:
SortUtil.swap(queue,j,k); J Wyoh|
k = j; ] !*
} Zv7$epDUz
} gV.Pg[[1
private void fixUp(int k) { 4>ce,*B1
while (k > 1) { b<8J;u<
int j = k >> 1; KX`nHu;
if (queue[j]>queue[k]) 7!QXh;u
break; ~>-;(YU"t
SortUtil.swap(queue,j,k); 0R!}}*Ee>q
k = j; gu%'M:Xe
} /n3&e
} 0o'ML""j
Jtk.v49Ad>
} J$ih|nP
+`vZg^_c`
} 0Ukl#6
b+#~N>|
SortUtil： @^4M~F%
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package org.rut.util.algorithm; M&\?)yG
8J(zWV7 r
import org.rut.util.algorithm.support.BubbleSort; #di_V"
import org.rut.util.algorithm.support.HeapSort; ?~y(--.t;T
import org.rut.util.algorithm.support.ImprovedMergeSort; Cot\i\]jv
import org.rut.util.algorithm.support.ImprovedQuickSort; g1!L. On
import org.rut.util.algorithm.support.InsertSort; ke6cZV5w
import org.rut.util.algorithm.support.MergeSort; hy`)]>9z~
import org.rut.util.algorithm.support.QuickSort; (9q{J(44
import org.rut.util.algorithm.support.SelectionSort; N %/DN
import org.rut.util.algorithm.support.ShellSort; YGO7lar
r#w_=h)
/** )aA9z(x
* @author treeroot !5 :[XvI#
* @since 2006-2-2 EF^=3
* @version 1.0 #3[b|cL
*/ o)D+qiA3U
public class SortUtil { dGW7,B~
public final static int INSERT = 1; u4^"E+y^S
public final static int BUBBLE = 2; 8}E(UsTa
public final static int SELECTION = 3; U4I` xw'
public final static int SHELL = 4; R3!vS+5rR
public final static int QUICK = 5; X|B;>q
public final static int IMPROVED_QUICK = 6; < 3+&DV-<N
public final static int MERGE = 7; Gbm_xEPC
public final static int IMPROVED_MERGE = 8; M[N.H9
public final static int HEAP = 9; z7pXpy \
Z!l!3(<G.f
public static void sort(int[] data) { 2}C>{*}yQ
sort(data, IMPROVED_QUICK); '9Odw@tp
} .`#R%4Xl
private static String[] name={ `-YSFQ~O,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DN{G$$or
}; x{o5Ha{
[jn;| 3
private static Sort[] impl=new Sort[]{ BiCa "
new InsertSort(), Sg~A'dG
new BubbleSort(), zi[M{bm
new SelectionSort(), M{RZ-)IC
new ShellSort(), ? Z fhz
new QuickSort(), /%w[q:..h
new ImprovedQuickSort(), +((31l
new MergeSort(), IGV.0l
new ImprovedMergeSort(), D ;I;,Z
new HeapSort() ~"0X,APR5
}; _%%"Y}
z(68^-V=:
public static String toString(int algorithm){ Ui;s.f
return name[algorithm-1]; 5&Kn #
} ho$%7mc
(uc)^lfX
public static void sort(int[] data, int algorithm) { F@K;A%us)
impl[algorithm-1].sort(data); ;@s~t:u
} fR;_6?p*B
TN_$E&69I
public static interface Sort { C}EDl2
public void sort(int[] data); GlD'?Mk1
} X_@@v|UF
zm"g,\.d
public static void swap(int[] data, int i, int j) { }@6 %yR
int temp = data; LbknSy C
data = data[j]; 2/N*Uk 0
data[j] = temp; F;@&uXYgc
} l;kZS
} U {!{5l: