[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; kkXe=f%
} w4l]rH
int i1=l; 4|DN^F~iut
int i2=mid+1; JY3!jtv
for(int cur=l;cur<=r;cur++){ f,ql8q(|J
if(i1==mid+1) nI8zT0o
data[cur]=temp[i2++]; 1D%E})B6
else if(i2>r) 8tzL.P^
data[cur]=temp[i1++]; a>k9& w
else if(temp[i1] data[cur]=temp[i1++]; yGH')TsjD
else +P.JiH`\=
data[cur]=temp[i2++]; Is9.A_0h
} 38%"#T3#
} 7?\r9bD
B)rBM
} ovaX_d)cU
7H4kj7UK
改进后的归并排序: \jAI~|3
D!i|KI/
package org.rut.util.algorithm.support; ,q$2D,dz
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import org.rut.util.algorithm.SortUtil; (Z8wMy&:
ed#>q;jX
/** ?<^^.Si
* @author treeroot n;y[%H!g
* @since 2006-2-2 #z}0]GJKj
* @version 1.0 m/`L3@7Tt
*/ EF;B)y=
public class ImprovedMergeSort implements SortUtil.Sort { .ZM0cwF
&"Fz)}
private static final int THRESHOLD = 10; &LQfs4}a,
,2P/[ :
/* LN9.Q'@r?
* (non-Javadoc) m;PTO$--
* ^BP4l_rO9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1+Vei<H$
*/ S5~(3I )v
public void sort(int[] data) { GqgJ]m
int[] temp=new int[data.length]; D3y4e8+Z'
mergeSort(data,temp,0,data.length-1); MI~QXy,
} eQIS`T
m~F ~9&
private void mergeSort(int[] data, int[] temp, int l, int r) { jn oX%3d-
int i, j, k; ac8su0
int mid = (l + r) / 2; )4H0Bz2G
if (l == r) ,? Q1JZPy@
return; 7r pTk&`
if ((mid - l) >= THRESHOLD) sR| /s3;
mergeSort(data, temp, l, mid); biVsbxYurq
else Gi&/`vm
insertSort(data, l, mid - l + 1); 6L2Wv5C
if ((r - mid) > THRESHOLD) E&Sr+D aPD
mergeSort(data, temp, mid + 1, r); @== "$uRw
else z]j_,3Hff
insertSort(data, mid + 1, r - mid); UN:cRH{?*
HN<e)E38
for (i = l; i <= mid; i++) { ?yA 2N;
temp = data; N<QLvZh
} WrR8TYq9D]
for (j = 1; j <= r - mid; j++) { {(h!JeQ
temp[r - j + 1] = data[j + mid]; 7*4i0{]
} 5,R<9FjW
int a = temp[l]; ~u r}6T
int b = temp[r]; x_= 3!)
for (i = l, j = r, k = l; k <= r; k++) { A64c,Uv
if (a < b) { |xpOU*k
data[k] = temp[i++]; " pL5j
a = temp; uC2 5pH"
} else { +\J+?jOC4S
data[k] = temp[j--]; 0- u,AD
b = temp[j]; CC]q\%y-_
} !@>:k3DC&
} ,Uy~O(Ft
} Po.izE!C
zhU^~4F
/** g5 y*-t
* @param data ^;@!\Rc
* @param l vQ[ TcV
* @param i E%$[*jZ
*/ e{.P2rnh
private void insertSort(int[] data, int start, int len) { xP 3>8Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); SnoEi~Da
} ,;yaYF6|/
} UiZ1$d*
} ?y^ ix+M
} IOl0=+p
y <P1VES
堆排序： `Vh&XH\S
v&`n}lS
package org.rut.util.algorithm.support; ^{-Z3Yxd
s$/Z+"f(
import org.rut.util.algorithm.SortUtil; 4rD&Lg'
+^a@U^V
/** MU1T="N^+
* @author treeroot ShOB"J-
* @since 2006-2-2 QtOT'<2t]
* @version 1.0 RG-,<G`
*/ ST\d-x
public class HeapSort implements SortUtil.Sort{ T"E%;'(cp)
3.%jet1
/* (non-Javadoc) PH!rWR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C0L(ti;
*/ yI's=Iu`
public void sort(int[] data) { l+?sR<e?!
MaxHeap h=new MaxHeap(); sA+( |cEh
h.init(data); kFi=^#J{
for(int i=0;i h.remove(); d^`n/"Ice
System.arraycopy(h.queue,1,data,0,data.length); 3UJSK+d\
} pwV{@h!
D+*_iM6[-
private static class MaxHeap{ K Z0%J5
>n>gX/S<C
void init(int[] data){ 6!RKZj)
this.queue=new int[data.length+1]; 8HdjZ!
for(int i=0;i queue[++size]=data; ,m)YL>k
fixUp(size); ~uJO6C6A
} i\\,Z L
} MUp{2_RA
Y>K3.*.
private int size=0; ;*e$k7}F
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private int[] queue; 8FBXdk?A
wQX%*GbL2
public int get() { 0f,Ii_k bT
return queue[1]; <:~'s]`zf
} d'p@[1/
nAyyjd3!S
public void remove() { lUHpGr|U%
SortUtil.swap(queue,1,size--); E\~!E20^
fixDown(1); -[7S.
} h>n<5{zqM
file://fixdown xQ8?"K;iX
private void fixDown(int k) { \eS-wO7%
int j; _({K6adb
while ((j = k << 1) <= size) { 0EUC8Ni
if (j < size %26amp;%26amp; queue[j] j++; '>UQsAvm
if (queue[k]>queue[j]) file://不用交换 AkBEE
break; m# I
SortUtil.swap(queue,j,k); G88g@Exk
k = j; -}Gk@=$G
} ;5=5HYx%
} tR-rW)0K3Q
private void fixUp(int k) { =bb)B(
while (k > 1) { Qs\!Kk@
int j = k >> 1; [\)irCDv
if (queue[j]>queue[k]) gOn^}%4.I
break; (%|L23
SortUtil.swap(queue,j,k); 8MCSU'uQ
k = j; OyTp^W`&
} <{A|Xs
} UC?i>HsJrX
(k>I!Z/&2
} M!]g36h[
U("m}^
} |?<r
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SortUtil： = k>ygD_
o%?~9rf]]
package org.rut.util.algorithm; M\bea
8f-B-e?k
import org.rut.util.algorithm.support.BubbleSort; RQd5Q.
import org.rut.util.algorithm.support.HeapSort; ~@EBW3>~5
import org.rut.util.algorithm.support.ImprovedMergeSort; Rs1JCP=d8
import org.rut.util.algorithm.support.ImprovedQuickSort; "\x\P)j0>
import org.rut.util.algorithm.support.InsertSort; ?1/wl;=fm
import org.rut.util.algorithm.support.MergeSort; PD@@4@^
import org.rut.util.algorithm.support.QuickSort; SR&'38UCe
import org.rut.util.algorithm.support.SelectionSort; *qL"&h5W
import org.rut.util.algorithm.support.ShellSort; w_^g-P[o-
Ck^jgB.7
/** n ,CMGe^:
* @author treeroot v/}hy$7
* @since 2006-2-2 C-L["O0[
* @version 1.0 M9dUo7
*/ sBWLgJz?C
public class SortUtil { N^By#Z
public final static int INSERT = 1; YDo,9
public final static int BUBBLE = 2; EyPF'|Qtn
public final static int SELECTION = 3; Z<6Fq*I
public final static int SHELL = 4; e(sV4Z~
public final static int QUICK = 5; ;PG,0R`Z;
public final static int IMPROVED_QUICK = 6; ~0XV[$`L
public final static int MERGE = 7; j?9fb
public final static int IMPROVED_MERGE = 8; 4Nz]LK%@
public final static int HEAP = 9; \J3n[6;
K@+(6\6I
public static void sort(int[] data) { rJ_fg$.<
sort(data, IMPROVED_QUICK); '5m`[S-IU
} &&{_T4
private static String[] name={ [[9XqD]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" mRC6m K>
}; Z\P&i#
tz"zQC$
private static Sort[] impl=new Sort[]{ b>"=kN/
new InsertSort(), B3iU#
new BubbleSort(), 9W@Tf
new SelectionSort(), 1r;.r|
new ShellSort(), b0"R |d[i
new QuickSort(), LzJNQd'
new ImprovedQuickSort(), !)TO2?,^
new MergeSort(), :p,DAt}
new ImprovedMergeSort(), Zp*0%x!e
new HeapSort() F B7.b
}; 7Yd]#K{$
{pW(@4U
public static String toString(int algorithm){ / qo`vk A
return name[algorithm-1]; \hT=U*dMR
} # ~T KC|G
k->cqtG
public static void sort(int[] data, int algorithm) { 4mJ[Wr\y
impl[algorithm-1].sort(data); p(]o#$ 6[
} )rFcfS+/
;NeN2|I]
public static interface Sort { 74q|FQ
public void sort(int[] data); 7ZRLSq'S
} {QRrAi
I4"U/iL51
public static void swap(int[] data, int i, int j) { QnNddCiu=
int temp = data; p6e9mSs
data = data[j]; U:o(%dk
data[j] = temp; L=."<,\
} $*[-kIy
} 4P\?vz"