[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; IUco 8
} l4+!H\2
int i1=l; NET?Ep
int i2=mid+1; Mq-QWx"P
for(int cur=l;cur<=r;cur++){ ZhqrN]x
if(i1==mid+1) rzJNHf=FVY
data[cur]=temp[i2++]; QUL^]6$
else if(i2>r) @OOnO+g
data[cur]=temp[i1++]; 7n*,L5%?]4
else if(temp[i1] data[cur]=temp[i1++]; =[8EQdR
else `Tt}:9/3
data[cur]=temp[i2++]; VeO$n*O
} iOpMU
} ?bc-?<Xk
)X{x\ /N
} Fy|tKMhnc
T9r"vw
改进后的归并排序: -"qw5Y_oF?
7;dTQ.%n
package org.rut.util.algorithm.support; Fj\}&H*+
%,$Ms?,n`
import org.rut.util.algorithm.SortUtil; t3ua5xw
|;2Y|>=
/** $mvcqn;
* @author treeroot -<kl d+
* @since 2006-2-2 2Y_ `&
* @version 1.0 VuqN)CE^Uq
*/ OU;R;=/]
public class ImprovedMergeSort implements SortUtil.Sort { >$,A [|R
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private static final int THRESHOLD = 10; .'o<.\R8
&V5[Zj|]
/* x\t)uM%
* (non-Javadoc) r\7F}ZW/
* T"1H%65`V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <ijf':X=*
*/ 8Xpf|?.
public void sort(int[] data) { K8NoY6
int[] temp=new int[data.length]; u"IYAyzL
mergeSort(data,temp,0,data.length-1); 7Iu^l4=2
} hS]g^S==2h
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private void mergeSort(int[] data, int[] temp, int l, int r) { (9:MIP
int i, j, k; ' uvTOgP,
int mid = (l + r) / 2; Rd6? ,
if (l == r) 3R(GO.n=]
return; 8hWBTUN
if ((mid - l) >= THRESHOLD) DQ7+
mergeSort(data, temp, l, mid); USz|Rh
else Gt4| ]
insertSort(data, l, mid - l + 1); {~.~ b+v
if ((r - mid) > THRESHOLD) "&jA CI
mergeSort(data, temp, mid + 1, r); j-wSsjLk
else *yJCnoF
insertSort(data, mid + 1, r - mid); oTOr,Mn0\6
?>b>LDpx?
for (i = l; i <= mid; i++) { L><# I
temp = data; WP,Ll\K)7
} {awv=s
for (j = 1; j <= r - mid; j++) { .`Ey'T_
temp[r - j + 1] = data[j + mid]; ?sQOz[ig;
} ;,T3C:S?
int a = temp[l]; %H=d_Nm{
int b = temp[r]; C?@vBM}
for (i = l, j = r, k = l; k <= r; k++) { n_;qB7,,
if (a < b) { N3?hyR<T
data[k] = temp[i++]; _t<&#D~
a = temp; +2%ih!
} else { lSv?!2
data[k] = temp[j--]; P" +!mSe^~
b = temp[j]; 61|uvTX
} Kx.'^y
} ]h4^3
} 5WN^8`{'3
yZup4#>8
/** ZH8O%>!
* @param data V<~.:G$3H
* @param l <<#-IsT
* @param i _'9("m V
*/ [fF0Qa-
private void insertSort(int[] data, int start, int len) { =O= 0 D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :s8^nEK
} K)z{R n
} 6"@+Jz
} 0* Ox>O>
} .!uXhF'
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堆排序： O;RsYs9
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package org.rut.util.algorithm.support; hdky:2^3
nulCk33x'=
import org.rut.util.algorithm.SortUtil; t)|*-=
wQR>S>p
/** l ;"v&?
* @author treeroot !u@XEN>/
* @since 2006-2-2 KU,KEtf
* @version 1.0 v{%x,K56
*/ I9S=VFhZ`
public class HeapSort implements SortUtil.Sort{ \Eq,4-q
^0A}iJL
/* (non-Javadoc) 9Q{-4yF9k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yV=Ku
*/ p=F!)TnJN
public void sort(int[] data) { BJGL &N
MaxHeap h=new MaxHeap(); 5,/rh,?
h.init(data); 3m RP.<=
for(int i=0;i h.remove(); Dep.Qfv{-
System.arraycopy(h.queue,1,data,0,data.length); tHF-OarUO
} ~>C@n'\lv
hY$gzls4
private static class MaxHeap{ L?~>eT
12 y=Eh
void init(int[] data){ Dq=&K,5;
this.queue=new int[data.length+1]; Y,1ZvUOB
for(int i=0;i queue[++size]=data; Y+il>.Z
fixUp(size); Cjh0 .{
} a!UQ]prT
} )8`7i{F
y|r+<
private int size=0; q18IqY*Lo
W?y7mw_S
private int[] queue; wOW#A}m'vj
`SDpOqfIrP
public int get() { Ze `=n
return queue[1]; bf1Tky=/
} ODvlix
U^qQ((ek
public void remove() { p mv6m
SortUtil.swap(queue,1,size--); 0,1x- yD
fixDown(1); W5C8$Bqm
} {wUbr^
file://fixdown !O;su~7
private void fixDown(int k) { Q;9-aZ.H
int j; C\%T|ZDE
while ((j = k << 1) <= size) { #G</RYM~m
if (j < size %26amp;%26amp; queue[j] j++; xBba&A]=
if (queue[k]>queue[j]) file://不用交换 [k1N-';;;
break; @VdkmqXz
SortUtil.swap(queue,j,k); m9yi:zT%
k = j; ?'RB)M=Og7
} E?\&OeAkO
} n7Em t$Hi>
private void fixUp(int k) { GnAG'.t-Z
while (k > 1) { D~~"wos
int j = k >> 1; I,[njlO:
if (queue[j]>queue[k]) Jo%`N#jG
break; g.L~Z1-
SortUtil.swap(queue,j,k); N, `q1B
k = j; @zu IR0Gr)
} TcW-pY<N
} 91I6-7# Xt
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} pe}mA}9U
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} fU/&e^, 's
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SortUtil： b/#SkxW#S
/-J
package org.rut.util.algorithm; 4OX2GH=W
hc"l^a!7ic
import org.rut.util.algorithm.support.BubbleSort; AN193o
import org.rut.util.algorithm.support.HeapSort; kSW=DE|#}
import org.rut.util.algorithm.support.ImprovedMergeSort; L{pz)')I
import org.rut.util.algorithm.support.ImprovedQuickSort; x*`S>_j27=
import org.rut.util.algorithm.support.InsertSort; }~I(e
import org.rut.util.algorithm.support.MergeSort; |uUGvIsXn
import org.rut.util.algorithm.support.QuickSort; #%Hk-a=>)#
import org.rut.util.algorithm.support.SelectionSort; =g.R?H8cj5
import org.rut.util.algorithm.support.ShellSort; o7gYj\
w\V1pu^6@
/** h#hx(5"6
* @author treeroot T]er_n
* @since 2006-2-2 /Pbytu);ds
* @version 1.0 tLH:'"{zx
*/ @euH[<
public class SortUtil { %fbV\@jDCX
public final static int INSERT = 1; <K g=?wb
public final static int BUBBLE = 2; <v=$A]K
public final static int SELECTION = 3; vl`Qz"Xy
public final static int SHELL = 4; 9f(0 qa
public final static int QUICK = 5; ;C^!T
public final static int IMPROVED_QUICK = 6; .j et0w
public final static int MERGE = 7; $ol]G`+
public final static int IMPROVED_MERGE = 8; _+sb~
public final static int HEAP = 9; %wFz4:
/"+CH\) E
public static void sort(int[] data) { 8ln{!,j;
sort(data, IMPROVED_QUICK); UC e{V]T
} QJ i5H
private static String[] name={ (6}[y\a+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" enC/@){~
}; -1_WE/Ps
hqXp>.W
private static Sort[] impl=new Sort[]{ g2LY~
new InsertSort(), 2Kkm-#p7
new BubbleSort(), -gQtw% `x
new SelectionSort(), T}}T`Ce
new ShellSort(), kk`K)PESi
new QuickSort(), pD@:]VP
new ImprovedQuickSort(), |2Vhj<6
new MergeSort(), ]KQv]'
new ImprovedMergeSort(), 9T\uOaC"
new HeapSort() @$Xl*WT7
}; VGYx(
k~0#Iy_{M
public static String toString(int algorithm){ r*q
return name[algorithm-1]; cv{icz,%w
} R7o'V* d
/3`yaYkSh
public static void sort(int[] data, int algorithm) { +Rj8"p$K
impl[algorithm-1].sort(data); ; Sd== *
} @~z4GTF9i
+P &S0/
public static interface Sort { c$.Zg=
public void sort(int[] data); N&uRL_X.
} 3 <A?
`K7UWtp
public static void swap(int[] data, int i, int j) { uIy$|N
int temp = data; ~GLWhe-
data = data[j]; LULRi#n
data[j] = temp; }ed{8"bj
} .9u0WP95
} 2M+}o"g