[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; D6FG$SV
} kN vNV(4
int i1=l; v[m1R'
int i2=mid+1; *b1NVN$
for(int cur=l;cur<=r;cur++){ B8V85R
if(i1==mid+1) 6y@o[=m
data[cur]=temp[i2++]; DsiyN:o'+
else if(i2>r) @d[)i,d:G
data[cur]=temp[i1++]; X=JAyxY
else if(temp[i1] data[cur]=temp[i1++]; KH[Oqd
else J8`vk#5
data[cur]=temp[i2++]; f%STkL)
} IS!]!s'EI
} &gvX<X4e
mgEZiAV?
} =Ajw(I[56
n]wZ7z
改进后的归并排序: .-p?skm=a
j 2Jew
package org.rut.util.algorithm.support; ^F/H?V/PX
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import org.rut.util.algorithm.SortUtil; (Z>vbi%
!z?:Y#P3
/** ZpU4"x>
* @author treeroot MXY!N/
* @since 2006-2-2 'p'nAB''!
* @version 1.0 S3/Z]?o
*/ EPeV1$
public class ImprovedMergeSort implements SortUtil.Sort { }Ot2; T
54&&=NVs|
private static final int THRESHOLD = 10; RYX=;n
<$'FTv
/* 0OVxx>p/x
* (non-Javadoc) 7:S)J~s*O
* _d3/="=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SL%lY
*/ I[v~nY~l`
public void sort(int[] data) { l8!n!sC[,
int[] temp=new int[data.length]; =ThacZHb8
mergeSort(data,temp,0,data.length-1); zeHs5P8}r
} XE*#5u8t
sMb+4{W&6
private void mergeSort(int[] data, int[] temp, int l, int r) { Y3f2RdGl
int i, j, k; >K;C?gHo
int mid = (l + r) / 2; ljj}XJQ
if (l == r) <F5x}i~(C
return; qr7_3
if ((mid - l) >= THRESHOLD) q%}54E80
mergeSort(data, temp, l, mid); +p)kemJ~
else @X0$X+]E*8
insertSort(data, l, mid - l + 1); H52] Zm
if ((r - mid) > THRESHOLD) 3sBu`R*hk
mergeSort(data, temp, mid + 1, r); s$OnQc2/
else \Ot,&Z k2
insertSort(data, mid + 1, r - mid); p< jM%fbZk
ais"xm<V
for (i = l; i <= mid; i++) { [,p[%Dza
temp = data; sBu- \P#
} A!!W\Jt
for (j = 1; j <= r - mid; j++) { p\/;^c`7
temp[r - j + 1] = data[j + mid]; k7Xa|&fQP<
} 5?4jD]Z
int a = temp[l]; rM(2RI4O`0
int b = temp[r]; -*C+z!?BP
for (i = l, j = r, k = l; k <= r; k++) { i!EN/Bd
if (a < b) { x AR9* <-
data[k] = temp[i++]; '|l1-yD_
a = temp; 4P}<86xk
} else { #+Cu&l
data[k] = temp[j--]; ,Tc598D
b = temp[j]; dJd(m&.|N
} wloQk(T<W
} xD<:'-ri>
} +}0/ %5 =1
D[ (A`!)
/** +&hd3
* @param data bIahjxd:
* @param l g)#neEA J
* @param i q~:k[@`.
*/ ]l4#KI@
private void insertSort(int[] data, int start, int len) { P_ x9:3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ey>V^Fj
} r@Tq-o
} 0SLS;s.GX
} }*I:0"WH
} 0 lsX~d'W
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堆排序： \"@BZ.y
v9s/!<j
package org.rut.util.algorithm.support; 7ClN-/4
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import org.rut.util.algorithm.SortUtil; @'{m-?*
q}mQm'
/** U(cV#@Y
* @author treeroot A~Ov(
* @since 2006-2-2 Ov=^}T4zl
* @version 1.0 "]C$"JR
*/ !4B($]t
public class HeapSort implements SortUtil.Sort{ !B &%!06
B'Ll\<mq@
/* (non-Javadoc) + \AiUY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z tLP {q#
*/ 4=E9$.3a
public void sort(int[] data) { SiyZq"
MaxHeap h=new MaxHeap(); 'XHKhpm<
h.init(data); L^zF@n^5A
for(int i=0;i h.remove(); w(KB=lA2
System.arraycopy(h.queue,1,data,0,data.length); WS?"OTH.^\
} Hjm
MxO0#
private static class MaxHeap{ yBwgLn
Td !7Rx _
void init(int[] data){ VMZ"i1rP
this.queue=new int[data.length+1]; as?~N/}
for(int i=0;i queue[++size]=data; Z;bg;@r|
fixUp(size); 5g3D}F>OJ
} 3;6Criq}
} 2#bpWk9
gE>_:s
private int size=0; 3"Y |RSy
N>S_Vgk}
private int[] queue; nDvj*lZF
El$yM.M"
public int get() { #sK:q&/G`
return queue[1]; l|c#
} M/X&zr
*uq;O*s
public void remove() { O%.c%)4Xo
SortUtil.swap(queue,1,size--); pLvvv#Y
fixDown(1); D/1f>sl
} nmn 8Y V1
file://fixdown IOx9".
private void fixDown(int k) { `$*cW1
int j; h`0'27\C
while ((j = k << 1) <= size) { ySLa4DQf
if (j < size %26amp;%26amp; queue[j] j++; :eIu<_,}
if (queue[k]>queue[j]) file://不用交换 `is."]%f
break; !z7j.u`Y
SortUtil.swap(queue,j,k); e==}qQ
k = j; '<.@a"DnJ
} D.hj9
} al9L+ruR
private void fixUp(int k) { B1GBQH$Ms
while (k > 1) { GoK[tjb
int j = k >> 1; ]YP J.[n
if (queue[j]>queue[k]) O|opNr
break; M7|k"izv
SortUtil.swap(queue,j,k); i1"4ztZ
k = j; Vu3;U
} M~Tx4_t
} t<Iy`r71
F|t3%dpj
} 2aef[TY
Ov$_Phm:
} lC8DhRd0_
6^M!p4$hF
SortUtil： 2cy: l03
s%K9;(RWI
package org.rut.util.algorithm; }i7Gv K<[:
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import org.rut.util.algorithm.support.BubbleSort; "Cz8nG
import org.rut.util.algorithm.support.HeapSort; ~@=*JzP?
import org.rut.util.algorithm.support.ImprovedMergeSort; G(2(-x"+
import org.rut.util.algorithm.support.ImprovedQuickSort; vKv!{>,v9Z
import org.rut.util.algorithm.support.InsertSort; DM3W99PWA
import org.rut.util.algorithm.support.MergeSort; <g SZt\
import org.rut.util.algorithm.support.QuickSort; 6PF7Wl7.
import org.rut.util.algorithm.support.SelectionSort; 66G$5
import org.rut.util.algorithm.support.ShellSort; =BN_Kvza^6
UE2!,Z,
/** ^gY^I`"e6
* @author treeroot \J>a*
* @since 2006-2-2 dX4"o?KD>
* @version 1.0 2E Ufd\
*/ 8Z{e/wnVF
public class SortUtil { gr?[KDl~
public final static int INSERT = 1; +9MoKn=h
public final static int BUBBLE = 2; Cpm&w?6
public final static int SELECTION = 3; r~&[Gaw
public final static int SHELL = 4; Q Q3a&
public final static int QUICK = 5; g]sc)4
public final static int IMPROVED_QUICK = 6; 8J}gj7^8
public final static int MERGE = 7; >l & N
public final static int IMPROVED_MERGE = 8; ?U\@?@
public final static int HEAP = 9; AATiI+\S
Ifghyh<d
public static void sort(int[] data) { s bl>i
sort(data, IMPROVED_QUICK); zGfF.q}
} j06q3N"
private static String[] name={ R!mFMw"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y7TW_[_u
}; 3ZZ"mlk*
'jr\F2
private static Sort[] impl=new Sort[]{ jea{BhdUr
new InsertSort(), ~C|. .Z
new BubbleSort(), u@V|13p<
new SelectionSort(), )5NfOvmNB
new ShellSort(), EDMuQu/D8
new QuickSort(), O#j&8hQ>
new ImprovedQuickSort(), CK<Wba
new MergeSort(), sop*?0
new ImprovedMergeSort(), ?<YQ %qaW7
new HeapSort() z}'-gv\,
}; {h<V^r
R^DZ@[\iV
public static String toString(int algorithm){ )=KD
return name[algorithm-1]; Hs}3c R}
} k[{h$
h!k[]bt5
public static void sort(int[] data, int algorithm) { tZW2TUM]
impl[algorithm-1].sort(data); f6\`eLGi1
} k/6Qwb#
Bu[sSoA
public static interface Sort { }XJA#@
public void sort(int[] data); M0+xl+c+
} `x{*P.]N!<
|ia#Elavo
public static void swap(int[] data, int i, int j) { nY]5pOF:
int temp = data; `7v"(
data = data[j]; ""0 cw
data[j] = temp; `\}Ck1o
} JDp"!x{O
} zEHX:-f8