[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; c'|](vOd]
} ~fnu;'fN
int i1=l; N 2XL5<
int i2=mid+1; 4og/y0n,l"
for(int cur=l;cur<=r;cur++){ JjMa
if(i1==mid+1) i}Q"'?
data[cur]=temp[i2++]; W6c]a/
else if(i2>r) >U\1*F,Om,
data[cur]=temp[i1++]; ]`eP"U{
else if(temp[i1] data[cur]=temp[i1++]; 33},lNS|
else 216=7O2F
data[cur]=temp[i2++]; Wn%b}{9Fb
} Cer&VMrQK
} = Ed0vw
X 0vcBHh
} g1kYL$o4
%T6 sm
改进后的归并排序: ,A%p9
OLS/3c z
package org.rut.util.algorithm.support; X aE;i57$l
m?O~(6k@C
import org.rut.util.algorithm.SortUtil; J?C#'2/
n58yR -"
/** 3N[Rrxe2
* @author treeroot Ce/l[v
* @since 2006-2-2 8bJj3vr
* @version 1.0 %* k`z#b
*/ H\fsyxM7
public class ImprovedMergeSort implements SortUtil.Sort { +'|nsIx,
Sx8RH),k
private static final int THRESHOLD = 10; i 558&:
pC~M5(F_
/* 5>6:#.f%!e
* (non-Javadoc) :X}n[K
* 9Iu"DOxX%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .H@b zm
*/ Cs4ks`Z18
public void sort(int[] data) { ~^TH5n
int[] temp=new int[data.length]; R53^3"q~
mergeSort(data,temp,0,data.length-1); Xp+lpVcJ
} r;^%D(
s*Nb=v.e9
private void mergeSort(int[] data, int[] temp, int l, int r) { bj6;>Ezp3(
int i, j, k; d&* c3F
int mid = (l + r) / 2; 2@N9Zk{{J
if (l == r) ZsNZ3;d@u(
return; s0O]vDTR,H
if ((mid - l) >= THRESHOLD) ZkJLq[:cM
mergeSort(data, temp, l, mid); I&U.5wf
else M5a&eO
insertSort(data, l, mid - l + 1); jM}(?^@
if ((r - mid) > THRESHOLD) n)0M1o#
mergeSort(data, temp, mid + 1, r); fK^W6)uuV
else s:k?-u@
insertSort(data, mid + 1, r - mid); Lb?WhjqZ
;}Ei #T,D
for (i = l; i <= mid; i++) { ",xTgB3?V
temp = data; f(G1xw]]@Y
} c@2a)S8Y]
for (j = 1; j <= r - mid; j++) { G@KDRv
temp[r - j + 1] = data[j + mid]; TSD7R
} 8@[S,[
int a = temp[l]; )@ofczl6
int b = temp[r]; jddhX]>I
for (i = l, j = r, k = l; k <= r; k++) { q3vv^~
if (a < b) { ]$uC~b
data[k] = temp[i++]; + ZKU2N*
a = temp; jOU99X\0
} else { ;X^#$*=Q
data[k] = temp[j--]; OxPl0-]t
b = temp[j]; &) 64:l&
} &:&~[4>%a
} ,5V6=pr$
} %AN,cE*
L+S)hgUH
/** #*q]^Is"
* @param data nG";?TT
* @param l ;\v&4+3S
* @param i TQu.jC
*/ =w* 8
private void insertSort(int[] data, int start, int len) { =;4K5l{c
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1c{m rsB
} }N}Js*
} 2-DG6\QX|
} U)xebU.!S
} }hsNsQ
DZ @B9<Zz{
堆排序： $KQ q~|
YKz#,
package org.rut.util.algorithm.support; 9%Tqk"x?
Zs]n0iwM'@
import org.rut.util.algorithm.SortUtil; s=]NKJaQH
b*Q3j}cZ
/** $/lM %yXe
* @author treeroot D;s%cL`
* @since 2006-2-2 `#'j3,\6
* @version 1.0 pSbtm74
*/ fgs@oaoZ
public class HeapSort implements SortUtil.Sort{ c:e3hJ
PZQAlO,
/* (non-Javadoc) ^.R!sQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eKy!Pai
*/ w\MWr+4
public void sort(int[] data) { 4/%fpU2
MaxHeap h=new MaxHeap(); h=S7Z:IaM
h.init(data); W+GC3W
for(int i=0;i h.remove(); Vz$xV!
System.arraycopy(h.queue,1,data,0,data.length); ,p3]`MG
} X4]miUmh
eAo+w*D(
private static class MaxHeap{ m94PFD@N
Q=8YAiCu
void init(int[] data){ bf@g*~h@
this.queue=new int[data.length+1]; 78{9@\e"0
for(int i=0;i queue[++size]=data; 'YB[4Q /0
fixUp(size); PJ;WNo8
} 5+11J[~{
} Lu{/"&)
G^tazAEfo
private int size=0; :'B(DzUR
SzIzQR93&
private int[] queue; :Fm*WqZu
>SLQW
public int get() { _}Qtx/Cg
return queue[1]; >O<a9wz
} l;KrFJ6
umWs8-'Uw
public void remove() { ">.tPn
SortUtil.swap(queue,1,size--); mW4Cc1*
fixDown(1); YnuY/zDF
} ,@c1X:
file://fixdown *1Bq>h:
private void fixDown(int k) { tVO}{[U}
int j; z &Xl
while ((j = k << 1) <= size) { $1"gFg
if (j < size %26amp;%26amp; queue[j] j++; HA8A}d~
if (queue[k]>queue[j]) file://不用交换 J}&U[ds p
break; CV\^gTPmx
SortUtil.swap(queue,j,k); EYn?YiVFU
k = j; w$/lq~zU
} h$kz3r;b,"
} r&m49N,d
private void fixUp(int k) { I]`RvT
while (k > 1) { |YsR;=6wT
int j = k >> 1; l99Lxgx=
if (queue[j]>queue[k]) >zqaV@T
break; 4/|x^Ky>G
SortUtil.swap(queue,j,k); _,!0_\+i
k = j; ]y6{um8"
} gy%.+!4>v`
} Fy"M 4;7
Et!J*{s
} &n;*'M
W,NqevXo:
} `X5!s
>U,&V%y
SortUtil： ttUK~%wSx
t*9 gusmG
package org.rut.util.algorithm; I)V=$r{
g%l ,a3"
import org.rut.util.algorithm.support.BubbleSort; 'o6}g p)
import org.rut.util.algorithm.support.HeapSort; ",3v%$>
import org.rut.util.algorithm.support.ImprovedMergeSort; I{OizBom
import org.rut.util.algorithm.support.ImprovedQuickSort; pe vXixl
import org.rut.util.algorithm.support.InsertSort; {o5|(^l
import org.rut.util.algorithm.support.MergeSort; k7Bh[ ..!
import org.rut.util.algorithm.support.QuickSort; )`rD]0ua;
import org.rut.util.algorithm.support.SelectionSort; I4G0!"T+
import org.rut.util.algorithm.support.ShellSort; LWv<mtuYf
b'\Q/;oz>
/** #0r~/gW
* @author treeroot RbL?(
* @since 2006-2-2 ,Q56A#Y\
* @version 1.0 @KK6JyOTQ
*/ {/]2~!
public class SortUtil { =}#yi<Lt
public final static int INSERT = 1; JY2<ECO
public final static int BUBBLE = 2; `jGeS[FhR
public final static int SELECTION = 3; xcr2|
public final static int SHELL = 4; GMJ4v S
public final static int QUICK = 5; EjLq&QR.
public final static int IMPROVED_QUICK = 6; $KYGQP
public final static int MERGE = 7; WVRIq'
public final static int IMPROVED_MERGE = 8; `s)4F~aVo
public final static int HEAP = 9; V?j,$LixY
)vS0Au^C~
public static void sort(int[] data) { RFL* qd4
sort(data, IMPROVED_QUICK); e&;e<6l&{
} (DO'iCxlNh
private static String[] name={ UsyNn39
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ob/)f)!!
}; y017 B<Ou
6?F88;L
private static Sort[] impl=new Sort[]{ &N^~=y^`C'
new InsertSort(), _ l|%~
new BubbleSort(), ~D9Cu>d9
new SelectionSort(), &^"Ru?MK
new ShellSort(), @v%Kwe1Q
new QuickSort(), YbU8 xq
new ImprovedQuickSort(), 9!jPZn
new MergeSort(), OF7hp5
new ImprovedMergeSort(), j**[[
new HeapSort() FE\E%_K'n7
}; =$J(]KPv!?
4CF;>b f~
public static String toString(int algorithm){ Ncz4LKzt
return name[algorithm-1]; #@B"E2F
} \:4*h
^[7Mp
public static void sort(int[] data, int algorithm) { +a!3*G@N+
impl[algorithm-1].sort(data); H ni^S
} ML_VD*t9
euB1}M
public static interface Sort { fB3Jp~$
public void sort(int[] data); pq{`WgA^
} @!P2f
W^[FWFUTY
public static void swap(int[] data, int i, int j) { Y/5M)AyJt
int temp = data; 6Cj7 =|L7
data = data[j]; 2'?'dfj
data[j] = temp; 23):OB>S`
} !G3AD3
} ,GH`tK_