[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; ]dSK wxk
} Bq@zaMv
int i1=l; /`[!_4i
int i2=mid+1; LvcuZZ`1a
for(int cur=l;cur<=r;cur++){ Z<U>A
if(i1==mid+1) dH\XO-Z7v
data[cur]=temp[i2++]; >O#grDXb
else if(i2>r) 24ux
data[cur]=temp[i1++]; 2?W7I/F
else if(temp[i1] data[cur]=temp[i1++]; .Pe9_ZH$W
else 7\ypW$Ot
data[cur]=temp[i2++]; PY`L$e
} hN3u@P^
} YuQ~AE'i
7G<t"'
} D'b#,a;V
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改进后的归并排序: & ze>X
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package org.rut.util.algorithm.support; `S3>3
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import org.rut.util.algorithm.SortUtil; i%-Ld Ka}"
Tde0~j}
/** ]E3<UR
* @author treeroot .$!{-v[
* @since 2006-2-2 eS'yGY0b
* @version 1.0 $bvJTuw
*/ ,lt8O.h-l
public class ImprovedMergeSort implements SortUtil.Sort { t9^A(Vh"-
FY'ty@|_s
private static final int THRESHOLD = 10; 2 rN ,D(
#aar9
/* AVl~{k|
* (non-Javadoc) M6rc!K
* Qd &"BEs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sbj";h=E
*/ L?5f+@0.
public void sort(int[] data) { 2&Jdf
int[] temp=new int[data.length]; }7s>B24J
mergeSort(data,temp,0,data.length-1); ^e Gue
} J~#$J&iKh
*|% ^0#$c
private void mergeSort(int[] data, int[] temp, int l, int r) { ka"337H
int i, j, k; . ]@=es
int mid = (l + r) / 2; 2HD]?:Fk7
if (l == r) WG7k(Sp]
return; pZ(Fx&fy
if ((mid - l) >= THRESHOLD) +nL+N
mergeSort(data, temp, l, mid); 71fk.16
else mee$"Y
insertSort(data, l, mid - l + 1); -%CoWcGP
if ((r - mid) > THRESHOLD) (:pq77
mergeSort(data, temp, mid + 1, r); 5fJ[}~
else 4)6xU4eBaL
insertSort(data, mid + 1, r - mid); _[K"gu
DgHaOAdU
for (i = l; i <= mid; i++) { 3;[DJ5
temp = data; A"v{~
} Q=uRKh
for (j = 1; j <= r - mid; j++) { FLZWZ;
temp[r - j + 1] = data[j + mid]; S4CbyXW
} ln!'_\{
int a = temp[l]; crcA\lJf
int b = temp[r]; ])DX%$f
for (i = l, j = r, k = l; k <= r; k++) { CO:u1?
if (a < b) { 2@=IT0[E\
data[k] = temp[i++]; j;1-p>z
a = temp; ccFn.($p?,
} else { .w?(NZ2~
data[k] = temp[j--]; 69K{+|
b = temp[j]; dXHB#
} N|g;W
} )~J>X{hy
} !7bw5H
~EzaC?fQ
/** a:,y Z
* @param data ;`YkMS`=W
* @param l <A5]]{9 +
* @param i |RkcDrB~
*/ Q/ms]Du
private void insertSort(int[] data, int start, int len) { N6OMYP1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /93l74.w
} /u%h8!"R
} &MZ$j46
} nlYR-.
} +!IQj0&'Y3
M:KbD|
堆排序： g7V8D
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package org.rut.util.algorithm.support; N==ZtKj F
/cr}N%HZB
import org.rut.util.algorithm.SortUtil; Ys+OB*8AE
}R[#?ty;]
/** $?G"GQ!.
* @author treeroot g>rp@M
* @since 2006-2-2 l%ayI
* @version 1.0 oX@ya3!Pz
*/ )tHaB,
public class HeapSort implements SortUtil.Sort{ LVJI_O{fH
7hW+T7u?
/* (non-Javadoc) b-U eIjX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =L|tp%!
*/ J_;N:7'p
public void sort(int[] data) { "xmP6=1
MaxHeap h=new MaxHeap(); M->*{D@a
h.init(data); VV4Gjc
for(int i=0;i h.remove(); 9E2j!
System.arraycopy(h.queue,1,data,0,data.length); acP+3u?r
} aprm0:Q^
PNF?;*`-{7
private static class MaxHeap{ ).` S/F
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void init(int[] data){ {rfF'@[
this.queue=new int[data.length+1]; Ji1Pz)fq
for(int i=0;i queue[++size]=data; Ho DVn/lr
fixUp(size); u] :m"LM
} }8|[;Qa`y
} /={Js*
fj7|D'c
private int size=0; -9 !.m
}G o$ \Bk
private int[] queue; vb 1@yQ
O%g$9-?F0
public int get() { 1g##sSa6
return queue[1]; b`yZ|j'ikd
} SK1!thQy
b*a2,MiM
public void remove() { |Fm6#1A@
SortUtil.swap(queue,1,size--); BqDKT
fixDown(1); dkgSvi :!
} YprHwL
file://fixdown }+o:j'jB
private void fixDown(int k) { MV_Srz
int j; dY?`f<*
while ((j = k << 1) <= size) { }bN%u3mHws
if (j < size %26amp;%26amp; queue[j] j++; c4&'D;=
if (queue[k]>queue[j]) file://不用交换 73{'kK
break; Q9}dHIe1E
SortUtil.swap(queue,j,k); f/WQ[\<!I
k = j; iGB_{F~t4}
} T=hhoGn
} v_e9}yI
private void fixUp(int k) { J"=1/,AS
while (k > 1) { ;.xoN|Per
int j = k >> 1; J q{7R
if (queue[j]>queue[k]) xtPLR/Z
break; Wg{k$T_>
SortUtil.swap(queue,j,k); Go,N>HN
k = j; WN(ymcdYB
} 26X+ }^52
} m)V/L]4
f\'{3I29
} !O\;Nua
(feTk72XX
} '$4O!YI9@
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SortUtil： DD" $1o"
0 a]/%y3V
package org.rut.util.algorithm; ??TMSH
eh1Q7~
import org.rut.util.algorithm.support.BubbleSort; o6f_l^+H
import org.rut.util.algorithm.support.HeapSort; nJPyM/p
import org.rut.util.algorithm.support.ImprovedMergeSort; {t};-q!v$j
import org.rut.util.algorithm.support.ImprovedQuickSort; qE'9QQ>:b
import org.rut.util.algorithm.support.InsertSort; dKl^jsd
import org.rut.util.algorithm.support.MergeSort; hTP:[w)
import org.rut.util.algorithm.support.QuickSort; 6wco&7
import org.rut.util.algorithm.support.SelectionSort; 988]}{w
import org.rut.util.algorithm.support.ShellSort; ]Jh+'RK\#
1ygpp0IGJ
/** 1c JF/"v
* @author treeroot PoEqurH0
* @since 2006-2-2 r=yK,d/1
* @version 1.0 AiD[SR
*/ Fnk_\d6Ma
public class SortUtil { -{^}"N
public final static int INSERT = 1; `eu9dLzH
public final static int BUBBLE = 2; .NtbL./=|
public final static int SELECTION = 3; .0R v(Y
public final static int SHELL = 4; s2j['g5
public final static int QUICK = 5; ngj,x7t
public final static int IMPROVED_QUICK = 6; @EE."T9
public final static int MERGE = 7; 8M@BG8
public final static int IMPROVED_MERGE = 8; lL]y~u
public final static int HEAP = 9; + [Hh,I7
Y(.OF Q
public static void sort(int[] data) { L 8{\r$
sort(data, IMPROVED_QUICK); g$. \
} qj cp65^
private static String[] name={ ]%Zz \Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" NEa>\K<\
}; r>bJ%M}
N'xSG`,Mg
private static Sort[] impl=new Sort[]{ (E]!Z vE
new InsertSort(), /?'; nGq
new BubbleSort(), jqr1V_3(
new SelectionSort(), bQ|V!mrN}
new ShellSort(), %e*@CbO$
new QuickSort(), Scv#zuv_
new ImprovedQuickSort(), Lg"C]
new MergeSort(), V.wqZ {G
new ImprovedMergeSort(), 64:fs?H
new HeapSort() $%VuSrZ&
}; Qp`gswvE
U-n;xX0=
public static String toString(int algorithm){ AyMd:5;
return name[algorithm-1]; *%KKNT'*
} 2w)-\/j}
> xIJE2
public static void sort(int[] data, int algorithm) { ja=F7Usb
impl[algorithm-1].sort(data); 1~$);US
} d#2$!z#
')GSAY7
public static interface Sort { .f+TZDUO
public void sort(int[] data); )E+'*e{cK
} BB|?1"neg
#p[',$cC
public static void swap(int[] data, int i, int j) { ah~YeJp
int temp = data; ,^icPQSwc
data = data[j]; 6"dD2WV/
data[j] = temp; klUQkz |<a
} eW|^tH
} %4HRW;IU