[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; _@-D/g
} pzL !42
int i1=l; ctqXzM `
int i2=mid+1; 39j "z8n
for(int cur=l;cur<=r;cur++){ I)9un|+,y
if(i1==mid+1) !+Ia#(
data[cur]=temp[i2++]; \:`'!X1*U
else if(i2>r) r&qFv)0!`
data[cur]=temp[i1++]; qhNY<
else if(temp[i1] data[cur]=temp[i1++]; r@j$$Pk`
else d`M]>EDXp
data[cur]=temp[i2++]; zzq7?]D
} \(m_3 H
} -&3WN!egq
H?ZlJ|/c
} 7F=Xn@ _
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改进后的归并排序: x^s2bb
X}!r4<;(
package org.rut.util.algorithm.support; !sbKJ+V7
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import org.rut.util.algorithm.SortUtil; HkgmZw,
X^pxu6nm-
/** ,VtrQb)Yf
* @author treeroot oSDx9%
* @since 2006-2-2 Uwd^%x*
* @version 1.0 =v(MdjwFl
*/ G|WO
public class ImprovedMergeSort implements SortUtil.Sort { v\LcZt`}
m@qM|%(0x
private static final int THRESHOLD = 10; z?a<&`W
0H|U9
/* ve#*qz Y
* (non-Javadoc) lP9XqQ(
* y1zNF$<q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W`$D*X0*o
*/ |(mr&7O
public void sort(int[] data) { !y1]S .;
int[] temp=new int[data.length]; 1r %~Rm
mergeSort(data,temp,0,data.length-1); H*SEzVb
} B5-G.Z
(6Ssk4
private void mergeSort(int[] data, int[] temp, int l, int r) { *Ey5F/N}$H
int i, j, k; >,ThIwRN
int mid = (l + r) / 2; +@:$7m(V
if (l == r) LdSBNg#3
return; .iDxq8l
if ((mid - l) >= THRESHOLD) vSu|!Xb]
mergeSort(data, temp, l, mid); pt`^4}
else %]~XbO
insertSort(data, l, mid - l + 1); K2=`.
if ((r - mid) > THRESHOLD) pI__<
mergeSort(data, temp, mid + 1, r); l?_h(Cq<
else '/Y D$*,
insertSort(data, mid + 1, r - mid); j_r?4k
_;8aiZt|u
for (i = l; i <= mid; i++) { ah82S)a`}
temp = data; =N_7DT
} $6&P 69<
for (j = 1; j <= r - mid; j++) { ,34|_
temp[r - j + 1] = data[j + mid]; 3 #fOrNU2
} QQQ3U
int a = temp[l]; I|RMxx y;
int b = temp[r]; XxN=vL&m
for (i = l, j = r, k = l; k <= r; k++) { Y}'8`.
if (a < b) { ?A!Lh,
data[k] = temp[i++]; Xp(e/QB
a = temp; ;(]O*{F7k
} else { m\3r<*q6
data[k] = temp[j--]; Bl)znJ^
b = temp[j]; Rnl 4
} zjyj,jP
} r*-e~
} mp^;8??;
@uIY+_E40g
/** lq4vX^S
* @param data Lk%u(duU^
* @param l 6$]p;}#
* @param i _h@s)"
*/ Hh/Z4`&yi
private void insertSort(int[] data, int start, int len) { ] D(laqS;"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?DN4j!/$
} e ]@Ex
} (}$~)f#s
} "E? 8.`T
} l7rGz2:?
~2R3MF.C
堆排序： %]>LnbM>4
@iC,0AK4k
package org.rut.util.algorithm.support; a@1r3az
?J;*
import org.rut.util.algorithm.SortUtil; %s]l^RZ
c=S-g 9J
/** LU#DkuIG
* @author treeroot z8#c!h<@;
* @since 2006-2-2 $6~ \xe=
* @version 1.0 5H+S=
*/ R~jV
public class HeapSort implements SortUtil.Sort{ .Yl*kG6r
a59l"b
/* (non-Javadoc) lX)RG*FlTC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c)N&}hFYC
*/ k'_p*H
public void sort(int[] data) { ,n')3r
MaxHeap h=new MaxHeap(); FZ!KZ!p
h.init(data); #MZ0Sd8]&
for(int i=0;i h.remove(); v>vU]6l
System.arraycopy(h.queue,1,data,0,data.length); Rp#9T?i``[
} Ivw+U-Mz
$gYy3y
private static class MaxHeap{ mY+.(N7m
1' #%UA
void init(int[] data){ ELF,T(
this.queue=new int[data.length+1]; &"V%n
for(int i=0;i queue[++size]=data; &FQ]`g3_@
fixUp(size); NNWbbU3wjh
} rUunf'w`e1
} qXHr[C"
$(2c0S{1
private int size=0; s+"[S%
:U5>. ):
private int[] queue; ^k&T?uU
d|,,,+fS
public int get() { jg ~;s
return queue[1]; UX-l`ygl
} 8]DN]\\o
mp_(ke
public void remove() { |"[[.Adw9"
SortUtil.swap(queue,1,size--); |51z&dG
fixDown(1); 5 =Os sAr
} Zi+>#kDV
file://fixdown ~I0I#_$'P
private void fixDown(int k) { B_u+$Odo
int j; st;.Po[h
while ((j = k << 1) <= size) { Fm\ h883\
if (j < size %26amp;%26amp; queue[j] j++; .uAOk0^z
if (queue[k]>queue[j]) file://不用交换 NN<kO#c+2
break; t7VXW{3
SortUtil.swap(queue,j,k); N=) E$h
k = j; LK8K=AA3P
} >\Qyg>Md]
} WMB~? EDhv
private void fixUp(int k) { JwzA'[tM
while (k > 1) { w%,Iy,G@
int j = k >> 1; 05".;(
if (queue[j]>queue[k]) MB<oWH[e)
break; xg~ Baun
SortUtil.swap(queue,j,k); \ H#zRSbZ
k = j; =,D3e+P'
} jWb;Xk4
} q9-=>
)Cuc]>SC
} xACAtJ'gc
~+VIELU<%
} (rcH\
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SortUtil： l?_Iu_Qp
saOXbt(&
package org.rut.util.algorithm; u1yc
@].Ko[P~
import org.rut.util.algorithm.support.BubbleSort; X*F#=.lh
import org.rut.util.algorithm.support.HeapSort; W M/pP?||
import org.rut.util.algorithm.support.ImprovedMergeSort; I;`)1
import org.rut.util.algorithm.support.ImprovedQuickSort; 2Y&QJon)
import org.rut.util.algorithm.support.InsertSort; E<>Ev_5>
import org.rut.util.algorithm.support.MergeSort; 6:i(<7
import org.rut.util.algorithm.support.QuickSort; d+KLtvB%M
import org.rut.util.algorithm.support.SelectionSort; 9C5w!_b@
import org.rut.util.algorithm.support.ShellSort; v&}mbt-
9N>Dp N
/** Y_&D W4
* @author treeroot zJWh
* @since 2006-2-2 (o_w[jv
* @version 1.0 PTe8,cD>
*/ &?(r#T
public class SortUtil { YPAMf&jEF
public final static int INSERT = 1; H"4^
public final static int BUBBLE = 2; `.+_}.m
public final static int SELECTION = 3; d$<HMs:o@
public final static int SHELL = 4; ]|[,N>
public final static int QUICK = 5; u\zRWX
public final static int IMPROVED_QUICK = 6; F9q<MTh
public final static int MERGE = 7; &1:xY.Zs_
public final static int IMPROVED_MERGE = 8; :)+|q
public final static int HEAP = 9; ^9eJ)12pK
CuPZ0
public static void sort(int[] data) { ))}w;w
sort(data, IMPROVED_QUICK); 1btQ[a6j
} I%(`2rD8G
private static String[] name={ QK-_~9V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" XGZ1a/x;s
}; q4$zsw
sHO6y0P
private static Sort[] impl=new Sort[]{ Le"$ksu>
new InsertSort(), nG&=$7x^
new BubbleSort(), ;5 cg<~t
new SelectionSort(), RE`XyS0Q
new ShellSort(), <!^wGN$f
new QuickSort(), ^-T!(P:
new ImprovedQuickSort(), IbQ3*
new MergeSort(), MWGW[V;
new ImprovedMergeSort(), Q9)/INh
new HeapSort() ,qJ/Jt$A
}; l>)0OP]
gq`gitu0
public static String toString(int algorithm){ $Jo[&,
return name[algorithm-1]; q#Az\B:
} j{EN %
uWR\#D'
public static void sort(int[] data, int algorithm) { zzi%r=%r&
impl[algorithm-1].sort(data); ]ERPWW;^
} Ia:n<sZU
$x]'6
public static interface Sort { >=c<6#:s<9
public void sort(int[] data); g7@G&Ro9J\
} Cul^b_UmP#
6=2M[T
public static void swap(int[] data, int i, int j) { wwVK15t
int temp = data; ',nGH|K.
data = data[j]; ;1}~(I#Y
data[j] = temp; qsXK4`
} jdV E/5
} !"B0z+O>