[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; ZE(RvPW
} Sl<-)a:
int i1=l; NCM{OAjS5U
int i2=mid+1; N8(x),
for(int cur=l;cur<=r;cur++){ .Zt/e>K&
if(i1==mid+1) 0JRBNh
data[cur]=temp[i2++]; WT {Cjn
else if(i2>r) Vq7 kA "
data[cur]=temp[i1++]; "yq;{AGOGl
else if(temp[i1] data[cur]=temp[i1++]; BMj&*p8R
else ]<_!@J6k
data[cur]=temp[i2++]; %C][E^9
} _ktSTzH0
} ?d#(ian
?'#;Y"RT
} U)%u`C0
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改进后的归并排序: Ay6rUN1ef
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package org.rut.util.algorithm.support; `V_/Cz_}D
9a Ps_|C
import org.rut.util.algorithm.SortUtil; !skWe~/
]~M{@h!<
/** 257;@;
* @author treeroot iR5soIR
* @since 2006-2-2 E|uXi)!.x
* @version 1.0 v;qL?_:=c
*/ vHe.+XY
public class ImprovedMergeSort implements SortUtil.Sort { F"#*8P
O xaua
private static final int THRESHOLD = 10; 4wD^?S!p
Q)X\VQcgj
/* k+G4<qw
* (non-Javadoc) vlyNQ7"%
* CKt~#$ I%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *7V{yK$O|
*/ {Om3fSk:
public void sort(int[] data) { G8-d%O p
int[] temp=new int[data.length]; %LlKi5u]
mergeSort(data,temp,0,data.length-1); E :gArQ
} A"ph!* i{
\mit&EUh}
private void mergeSort(int[] data, int[] temp, int l, int r) { kV%y%l(6
int i, j, k; %a^!~qV
int mid = (l + r) / 2; P3FpU<OBwp
if (l == r) 2m}]z.w#
return; 2xBGs9_Y
if ((mid - l) >= THRESHOLD) JJOs L!@
mergeSort(data, temp, l, mid); 2-2LmxLG
else 3lgyX/?o
insertSort(data, l, mid - l + 1); h4xdE0
if ((r - mid) > THRESHOLD) 62'0)Cy^
mergeSort(data, temp, mid + 1, r); XxQ2g&USk
else =,Um;hU3r
insertSort(data, mid + 1, r - mid); a#**96Av
#^w 1!xXD
for (i = l; i <= mid; i++) { +mPB?5
temp = data; }slEkpk?]
} >'g60R[
for (j = 1; j <= r - mid; j++) { ATewdq[C
temp[r - j + 1] = data[j + mid]; m{Xf_rQ w
} 5d;K.O
int a = temp[l]; 4[j) $!l`
int b = temp[r]; w8Vzx8
for (i = l, j = r, k = l; k <= r; k++) { cwU6}*_zn
if (a < b) { p)]^>-L
data[k] = temp[i++]; 0d)n}fm
a = temp; @d9*<>@:
} else { -/*{^[
data[k] = temp[j--]; fkG"72 95A
b = temp[j]; kQcQi}e
} |EU08b]P29
} wC@U/?
} aa3YtNpP
F&Z>B};
/** qo![#s
* @param data }z@hx@N/
* @param l TJa%zi
* @param i z$,hdZ]
*/ (VRnv
private void insertSort(int[] data, int start, int len) { a[#BlH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); tjL#?j
} "lMWSCas
} #jR?C9&!(
} 9$t@Gmn
} wIPDeC4
VJPPHJ[-
堆排序： UcIR0BYa
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package org.rut.util.algorithm.support; DvKMb-*S
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import org.rut.util.algorithm.SortUtil; 7k3\_BHyb\
";%1sK
/** $x<-PN
* @author treeroot {GY$J<5=
* @since 2006-2-2 RAa1KOxZX
* @version 1.0 ;!Mg,jlQ
*/ ttxOP
public class HeapSort implements SortUtil.Sort{ hTqJDP"&F
+%^xz 1m
/* (non-Javadoc) EkPSG&6RZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R``qQ;cc
*/ wjs7K|PK
public void sort(int[] data) { }\*|b@)]
MaxHeap h=new MaxHeap(); B!lw>rUMQ
h.init(data); .4-S|]/d,
for(int i=0;i h.remove(); 4cL=f
System.arraycopy(h.queue,1,data,0,data.length); JaTW/~ TU
} S|i //I%_
JD.z}2+
private static class MaxHeap{ kSrzIq<xre
7hQl,v< 5
void init(int[] data){ awtzt?VtLh
this.queue=new int[data.length+1]; "^7Uk#! 7
for(int i=0;i queue[++size]=data; qz):YHxT]n
fixUp(size); b ;b1V
} /_HL&|N_5
} F.6SX (x
Z7/lFS'~N
private int size=0; f+RDvgkKU
?J AzN
private int[] queue; 9w|q':<
3H2'HO
public int get() { GQQ6 t
return queue[1]; /vU31_eZt
} A1@a:P=
C.Yz<?;S
public void remove() { 0 $r{h}[^c
SortUtil.swap(queue,1,size--); 5VS<I\o}
fixDown(1); R8]bi|e)
} xC]/i(+bA
file://fixdown aeIR}'H|
private void fixDown(int k) { x3 <Lx^;
int j; G#>nOB
while ((j = k << 1) <= size) { ME"/%59r
if (j < size %26amp;%26amp; queue[j] j++; F ry5v?22
if (queue[k]>queue[j]) file://不用交换 KA7nncg;,
break; w;O '6"
SortUtil.swap(queue,j,k); a'r\e2/e?H
k = j; 2TO1i0
} b(F`$N@7C
} Smo'&x
private void fixUp(int k) { tVwN92*J
while (k > 1) { K,Vl.-4?
int j = k >> 1; p_D)=Ef|&
if (queue[j]>queue[k]) 0&|-wduR=
break; sTONkd
SortUtil.swap(queue,j,k); hi%>&i*
k = j; {WChD&v
} ~V5jjx*
} ;F-kE4w
%$U+?lk}
} {$JIR}4S
8dNJZoV
} TOs|f8ay
G}g+2`
SortUtil： C\Rd]P8\
78kk"9h'
package org.rut.util.algorithm; X|:O`b$G
C.|MA(7
import org.rut.util.algorithm.support.BubbleSort; L!5HE])<)
import org.rut.util.algorithm.support.HeapSort; :\Dm=Q\
import org.rut.util.algorithm.support.ImprovedMergeSort; Zv_<*uzKZ
import org.rut.util.algorithm.support.ImprovedQuickSort; x$t=6@<]
import org.rut.util.algorithm.support.InsertSort; 8w4.|h5FP
import org.rut.util.algorithm.support.MergeSort; 9(Z)c
import org.rut.util.algorithm.support.QuickSort; & |r)pl0$
import org.rut.util.algorithm.support.SelectionSort; ;NEHbLH#F
import org.rut.util.algorithm.support.ShellSort; <_}u5E)7(
_XN sDW4|
/** E;SFf
* @author treeroot ;C3](
* @since 2006-2-2 [Fe5a
* @version 1.0 vKxwv YDe
*/ >dO^pDSs
public class SortUtil { Ag-*DH0
public final static int INSERT = 1; BQ(`MM@
public final static int BUBBLE = 2; v "07H
public final static int SELECTION = 3; #F kdcY
public final static int SHELL = 4; y}8j_r
public final static int QUICK = 5; >A6lX)
public final static int IMPROVED_QUICK = 6; tO#y4<
public final static int MERGE = 7; #Uo 9BM
public final static int IMPROVED_MERGE = 8; e |!i1e!
public final static int HEAP = 9; 8Vp"}(Q
Ngr7E
public static void sort(int[] data) { D<:9pLD(
sort(data, IMPROVED_QUICK); >:.Bn8-
} |1EM )zh6
private static String[] name={ 5_PD?lg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KpWQ;3D2
}; g]S.u8K8m
DY%E&Vd:h
private static Sort[] impl=new Sort[]{ }Q*8QV
new InsertSort(), :%{8lanO
new BubbleSort(), ;G?_^ 0
new SelectionSort(), Z^b1i`v
new ShellSort(), R lv|DED$
new QuickSort(), S;= D/)[mr
new ImprovedQuickSort(), D`+'#%%x
new MergeSort(), 8"? t6Z;5
new ImprovedMergeSort(), 7@:uVowQ
new HeapSort() +%0+
}; 8ARpjYZP
Q~`n%uYg\{
public static String toString(int algorithm){ Oo,<zS=ICk
return name[algorithm-1]; Pp?J5HW
} $WDa}~j~^
Pm-@ZZ~
public static void sort(int[] data, int algorithm) { Gg_i:4F
impl[algorithm-1].sort(data); TB9ukLG^<<
} NVQIRQ.
r__uPyIMG/
public static interface Sort { ?>e-6*.
public void sort(int[] data); lUDzfJ}3
} 0h* AtZv_
<~]s+"oVc
public static void swap(int[] data, int i, int j) { 3]T2Zp&;
int temp = data; SOd(& >
data = data[j]; hD"Tjd` P
data[j] = temp; 1 #_R`(C{
} y'{0|Xj
} 6j0!$q^