[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; 8b4? O"
} XgeUS;qtta
int i1=l; 7xWJw
int i2=mid+1; )"2eN3H/
for(int cur=l;cur<=r;cur++){ ,4-],~T
if(i1==mid+1) tuY=)?
data[cur]=temp[i2++]; 9JILK9mVO
else if(i2>r) 8|L5nQ
data[cur]=temp[i1++]; *&+zI$u(
else if(temp[i1] data[cur]=temp[i1++]; W(-son~I
else e(&u3 #7Nn
data[cur]=temp[i2++]; )Q}Q -Zt
} R,OT\FQ<
} \TDn q!)?
}6{00er
} 8f%OPcr&
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改进后的归并排序: p=i6~
Xw|-v$'y
package org.rut.util.algorithm.support; _,e4?grP#
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import org.rut.util.algorithm.SortUtil; o,0 Z^"|
R'atg 9
/** fI=p^k:
* @author treeroot G$CSZrP.
* @since 2006-2-2 \-[ >bsg
* @version 1.0 !u4eI0?R?
*/ t.bM]QU!1
public class ImprovedMergeSort implements SortUtil.Sort { "W9z>ezp
^![7X'!;pt
private static final int THRESHOLD = 10; ~~t>;
VrhHcvnZ
/* "kIlxf3
* (non-Javadoc) t47;X}y f
* P^lzbWj^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Li 9$N"2
*/ zQu9LN
public void sort(int[] data) { #%#N.tB5
int[] temp=new int[data.length]; ]ZI@?H? O
mergeSort(data,temp,0,data.length-1); )g]A 'A=
} V<PH5'^$j
q,;wD1_wG
private void mergeSort(int[] data, int[] temp, int l, int r) { 3e\IRF xzb
int i, j, k; ;.R) uCd{=
int mid = (l + r) / 2; ?T|0"|\"'
if (l == r) EyBTja(4
return; /{I-gjovy
if ((mid - l) >= THRESHOLD) + kF%>F]
mergeSort(data, temp, l, mid); XV)ctF4
else DC_k0VBn
insertSort(data, l, mid - l + 1); 45jImCm
if ((r - mid) > THRESHOLD) :n%&
mergeSort(data, temp, mid + 1, r); $_\x}`c~.
else ~9;udBfwF
insertSort(data, mid + 1, r - mid); tk:G6Bkid
Bcb '4*:
for (i = l; i <= mid; i++) { qamq9F$V
temp = data; M}=>~TA@
} [l<&eI&ln
for (j = 1; j <= r - mid; j++) { A2P.5EN
temp[r - j + 1] = data[j + mid]; 1jPh0?BY
} l=$?#^^ /
int a = temp[l]; Wk!<P" nHd
int b = temp[r]; KAu>U3\/
for (i = l, j = r, k = l; k <= r; k++) { >5Y.
if (a < b) { 2nL*^hhh
data[k] = temp[i++]; lJx5scN[
a = temp; Wdj|RKw
} else { :j/sTO=
data[k] = temp[j--]; (>lH=&%zj
b = temp[j]; OcC|7s",
} u6MU @?
} (rBYE[@,
} >m%7dU
\uJ+~db=
/** 5as5{"l
* @param data 'cc{sjG
* @param l Np$ue }yr
* @param i GsiKL4|mj
*/ h1f 05
private void insertSort(int[] data, int start, int len) { j|XL$Q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -q?,
} ]4K4Nh~
} X7tBpyi
} .}(X19R
} 3hA5"G+7
#n|eq{fkK
堆排序： TWfkr
Ya!PV&"Z
package org.rut.util.algorithm.support; 'tX}6wurf
mSk";UCn
import org.rut.util.algorithm.SortUtil; WQBV~.<Yv
G%K&f1q%
/** xNLgcb@v>
* @author treeroot q:vGGK^
* @since 2006-2-2 wZKmU
* @version 1.0 .4<lw
*/ ,;<M+V3+
public class HeapSort implements SortUtil.Sort{ HJlxpX$_
_|;{{8*?
/* (non-Javadoc) z 8#{=e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7>AMzNj
*/ D^f;X.Qm
public void sort(int[] data) { ,,7hVw
MaxHeap h=new MaxHeap(); j}fSz)`i
h.init(data); rQ&XHG>Q*
for(int i=0;i h.remove(); b"OHXu
System.arraycopy(h.queue,1,data,0,data.length); ?t/\ID
} ln6=XDu
OE_V6Er
private static class MaxHeap{ Zv8_<>e
?H_>?,^
void init(int[] data){ \pP1k.~UnC
this.queue=new int[data.length+1]; 5Ux=5a
for(int i=0;i queue[++size]=data; T!^v^m@>y
fixUp(size); \+x#aN\
} 6X!jNh$oF
} 152LdZevF
10N0?K"
private int size=0; O&VA79\UO
{Wfwf
private int[] queue; - "{hP
-*kZ2grLt
public int get() { @,LU!#y(
return queue[1]; I\IDt~
} FiXqypT_(
jc,Qg2
public void remove() { -av=5hm
SortUtil.swap(queue,1,size--); n{M-t@r7
fixDown(1); K;>9K'n
} jBd=!4n
file://fixdown J2Qt!-
private void fixDown(int k) { h*3{IHAQ
int j; 5Z=GFKf|
while ((j = k << 1) <= size) { Il#ST
if (j < size %26amp;%26amp; queue[j] j++; _c(h{dn
if (queue[k]>queue[j]) file://不用交换 %:OX^^i;
break; nEbZ8M
SortUtil.swap(queue,j,k); TJZarNc$
k = j; G6xNR
} 8m[o*E.4F
} ]]y,FQ,r
private void fixUp(int k) { _G2)=yj]
while (k > 1) { u EERNo&
int j = k >> 1; bHXoZix
if (queue[j]>queue[k]) w U1[/
break; XK;Vu#E*^
SortUtil.swap(queue,j,k); r-Y7wM`TZ
k = j; +k/=L9#e
} wbg?IvY[
} K1&t>2=%
31QDN0o!~
} ",aEN=+|hV
SQ'%a-Mct
} U_Q;WPJ
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SortUtil： '+c@U~d*7
lAo4)
package org.rut.util.algorithm; {CFy %
(Bv~6tj~J
import org.rut.util.algorithm.support.BubbleSort; gtqtFrleG
import org.rut.util.algorithm.support.HeapSort; S@TfZ3Go|
import org.rut.util.algorithm.support.ImprovedMergeSort; &MB1'~Q,hq
import org.rut.util.algorithm.support.ImprovedQuickSort; 9Sl5jn
import org.rut.util.algorithm.support.InsertSort; 0r?]b*IEK
import org.rut.util.algorithm.support.MergeSort; I$XwM
import org.rut.util.algorithm.support.QuickSort; Tl+PRR6D*
import org.rut.util.algorithm.support.SelectionSort; aN!,\D
import org.rut.util.algorithm.support.ShellSort; ,kl``w|1M
*)vy%\
/** R0|4KT-i
* @author treeroot ;hh.w??
* @since 2006-2-2 AOz~@i^
* @version 1.0 IIF <Zkpb
*/ pOj8-rr
public class SortUtil { CBz=-Xr
public final static int INSERT = 1; S,a:H*Hf
public final static int BUBBLE = 2; kxmsrQ>av
public final static int SELECTION = 3; tJGK9!MH{(
public final static int SHELL = 4; {s6hi#R>
public final static int QUICK = 5; }%^3
public final static int IMPROVED_QUICK = 6; JbN,K
public final static int MERGE = 7; f'BmIFb#
public final static int IMPROVED_MERGE = 8; P0k.\8qz
public final static int HEAP = 9; Os!x<r|r
#F6M<V'
public static void sort(int[] data) { [jGE{<Je
sort(data, IMPROVED_QUICK); @4Q/J$
} F;Q'R|HQ
private static String[] name={ u(PUbxJ V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xlh<}Vtp
}; K~fWZT3]
l%qh^0
private static Sort[] impl=new Sort[]{ by$mD_sr
new InsertSort(), rqKK89fD'
new BubbleSort(), ^b^buCYw
new SelectionSort(), Z4m+GFY
new ShellSort(), =c%gV]>G
new QuickSort(), #RKd>ig%
new ImprovedQuickSort(), _<l)4A3rS
new MergeSort(), o WAy[
new ImprovedMergeSort(), FtDF}
new HeapSort() 2tQ?=V(Di
}; |D[LU[<C
Or55_E
public static String toString(int algorithm){ E5a7p.
return name[algorithm-1]; hZ')<@hNP
} pr1kYMrqri
\FnR'ne
public static void sort(int[] data, int algorithm) { nj-LG!"a
impl[algorithm-1].sort(data); 1KjzKFnb
} Q@"!uB.e
zQ(`pld
public static interface Sort { !wZIXpeL
public void sort(int[] data); Pjq()\/[Z
} UMHFq-
Pj5:=d8z(
public static void swap(int[] data, int i, int j) { IBW-[lr7
int temp = data; `trcYmR=k
data = data[j]; 6LqF*$+$`
data[j] = temp; Hr \vu`p$
} :!FGvR6
} @ *5+ZAF