[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; }ssja,;
} 'oY#a9~Z{
int i1=l; _[E+D0A
int i2=mid+1; >W >Ei(f
for(int cur=l;cur<=r;cur++){ ORF:~5[YS`
if(i1==mid+1) +ansN~3
data[cur]=temp[i2++]; z k}AGw
else if(i2>r) j%y{d(Q4
data[cur]=temp[i1++]; p[xGL } +\
else if(temp[i1] data[cur]=temp[i1++]; |kvH`&s
else L~;(M6Jp
data[cur]=temp[i2++]; U/kQwrM
} *k8?$(
} 6@8t>"}
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} h/{1(c}
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改进后的归并排序: JttDRNZAU
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package org.rut.util.algorithm.support; y9d"sqyh
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import org.rut.util.algorithm.SortUtil; *-Yw%uR
T_D] rMl
/** =$)M-;6
* @author treeroot q!'p
* @since 2006-2-2 +e2:?d@
* @version 1.0 4P1}XYD-2
*/ KgkRs?'z
public class ImprovedMergeSort implements SortUtil.Sort { 2yg6hR
j:'g*IxM_
private static final int THRESHOLD = 10; M+VWAh#uD
[yk-<}#B
/* F{a;=h#@Q
* (non-Javadoc) v ;}s`P\"
* EZ|v,1`e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pk.\IKlG]
*/ ^5Lk}<utw
public void sort(int[] data) { n6WKk+
int[] temp=new int[data.length]; .S-)
mergeSort(data,temp,0,data.length-1); &R@([=1
} EmcLW74
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private void mergeSort(int[] data, int[] temp, int l, int r) { M:}u|
int i, j, k; b=/'cQ
int mid = (l + r) / 2; EI 35&7(
if (l == r) 'n,V*9
return; lD3nz<p
if ((mid - l) >= THRESHOLD) cXqYO|3/M
mergeSort(data, temp, l, mid); C[ mTVxd
else kq5X<'MM9N
insertSort(data, l, mid - l + 1); P* `*^r3
if ((r - mid) > THRESHOLD) 1,;X4/*
mergeSort(data, temp, mid + 1, r); p+V#86(3
else J,CwC)
insertSort(data, mid + 1, r - mid); \|{/.R
S$Zi{bU`G
for (i = l; i <= mid; i++) { f!#!
temp = data; %Rn*oV
} S=mqxIo@m
for (j = 1; j <= r - mid; j++) { lh"*$.j-
temp[r - j + 1] = data[j + mid]; c'eZ-\d{
} _;;Zz&c
int a = temp[l]; %;dj6):@
int b = temp[r]; (XVBH1p"
for (i = l, j = r, k = l; k <= r; k++) { oXnaL)Rk
if (a < b) { eyyME c!
data[k] = temp[i++]; '{jr9Vh
a = temp; f2;.He
} else { _i+@HXR &
data[k] = temp[j--]; ={ms@/e/T
b = temp[j]; {JP q.A
} %?PFe}
} /v+)#[]>
} \|S!g_30m
_/I">/ivlM
/** P$z_A8}
* @param data 1Q>nS[
* @param l |sReHt2)d
* @param i bu]"?bc
*/ Y!CUUWM
private void insertSort(int[] data, int start, int len) { DHWz,M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /!?LBtqy
} *$<W"@%^J
} }LT&BNZj
} dg24h7|]
} RTm/-6[N
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堆排序： 9VnBNuT
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package org.rut.util.algorithm.support; T[bCY 6
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import org.rut.util.algorithm.SortUtil; ?@.v*'qR
c;$4}U4
/** 3OZPy|".ax
* @author treeroot K] (*l"'U5
* @since 2006-2-2 1g{Pe`G,
* @version 1.0 C}RO'_Pq
*/ 3x0t[{l
public class HeapSort implements SortUtil.Sort{ IFp%Ta
{6zNCO
/* (non-Javadoc) g F*AS(9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /D&&7;jJ
*/ hF,|()E[
public void sort(int[] data) { 5.9<g>C
MaxHeap h=new MaxHeap(); XVN`J]XHk
h.init(data); U-I,Q+[C[^
for(int i=0;i h.remove(); ?Afe}
System.arraycopy(h.queue,1,data,0,data.length); "0An'7'm
} VLez<Id9(
-r={P_E6
private static class MaxHeap{ X/,)KTo7
}4A] x`3
void init(int[] data){ qSc-V`*
this.queue=new int[data.length+1]; vQljxRtW
for(int i=0;i queue[++size]=data; x=oV!x
fixUp(size); 0ra'H/>Ly
} gw]%: WeH
} ;miif
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private int size=0; K& #il
t*gZcw5 r
private int[] queue; .S/5kLul
o.{W_k/n
public int get() { D:1@1Jr
return queue[1]; =&bI-
} & o5x
5#K*75>
public void remove() { M^o_='\bE
SortUtil.swap(queue,1,size--); /;*_[g5*i
fixDown(1); /4&gA5BS]
} 1!<t8,W4
file://fixdown @8|*Ndx2
private void fixDown(int k) { @NLcO}
int j; ZZY#.
while ((j = k << 1) <= size) { $Nu{c;7"
if (j < size %26amp;%26amp; queue[j] j++; F8f}PV]b
if (queue[k]>queue[j]) file://不用交换 .[Sis<A]%
break; 1M]=Nv
SortUtil.swap(queue,j,k); w4U,7%V
k = j; y{%0[x*N<m
} s#9q3JV0
} 4S<M9A}
private void fixUp(int k) { v675C#l(
while (k > 1) { MCKN.f%lP
int j = k >> 1; g#J`7n
if (queue[j]>queue[k]) PI9,*rOy
break; UMoj9/-
SortUtil.swap(queue,j,k); YB38K(
k = j; TN(Vzs%
} $UR:j8C{p$
} ^_WR) F'K
hNN>Pd~;
} EeW ,-I
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} !5`MiH
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SortUtil： J9Ao*IW~
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package org.rut.util.algorithm; K*/oWYM]
D*M `qPX~
import org.rut.util.algorithm.support.BubbleSort; EoAr}fI
import org.rut.util.algorithm.support.HeapSort; J:Cr.K`
import org.rut.util.algorithm.support.ImprovedMergeSort; 4t, 2H"M
import org.rut.util.algorithm.support.ImprovedQuickSort; r9[S%Def
import org.rut.util.algorithm.support.InsertSort; Z`Y&cKsn
import org.rut.util.algorithm.support.MergeSort; ,md_eGF
import org.rut.util.algorithm.support.QuickSort; fiGTI}=P
import org.rut.util.algorithm.support.SelectionSort; K:,V>DL
import org.rut.util.algorithm.support.ShellSort; xfYKUOp/
PkvW6,lS
/** ;4nY{)bD
* @author treeroot >y3FU1w5d
* @since 2006-2-2 >q"dLZ
* @version 1.0 ingG
*/ {VcRur}&Y8
public class SortUtil { =zkN63S
public final static int INSERT = 1; n'~==2
public final static int BUBBLE = 2; 7he73
public final static int SELECTION = 3; 1m*)MZ)
public final static int SHELL = 4; EA"hie7
public final static int QUICK = 5; W$4$%r8
public final static int IMPROVED_QUICK = 6; Coi[cfg0
public final static int MERGE = 7; mY"7/dw<v
public final static int IMPROVED_MERGE = 8; .shi?aWm
public final static int HEAP = 9; {9@D zP
&6eo;8 `U
public static void sort(int[] data) { 2W,9HSu8
sort(data, IMPROVED_QUICK); vV,TT%J8D
} y]db]pP5
private static String[] name={ 4^F[Gp?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" j4~(6Imm
}; @8L5UT
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private static Sort[] impl=new Sort[]{ `"5Ub,~
new InsertSort(), ;UQGi}?CD
new BubbleSort(), %_(vSpk
new SelectionSort(), FM{f{2j
new ShellSort(), N!+=5!
new QuickSort(), )/raTD
new ImprovedQuickSort(), cl& w/OJ#
new MergeSort(), (i~UH04r>s
new ImprovedMergeSort(), \<7Bx[/D4
new HeapSort() /Hr|u
}; B2;P%B
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public static String toString(int algorithm){ 1j?P$%p
return name[algorithm-1]; Y~"tL(WfJl
} gIB3DuUo
P5Xp #pa
public static void sort(int[] data, int algorithm) { $qNF /rF
impl[algorithm-1].sort(data); IiPX`V>RC
} [\8rh^LFi
I9X\@lTf
public static interface Sort { @6;OF5VsQ
public void sort(int[] data); `<7\Zl
} $$9H1)Ny
S\GWMB!oF
public static void swap(int[] data, int i, int j) { 8E%LhA.
int temp = data; R{g= N%O
data = data[j]; v;,W ^#`
data[j] = temp; F2N"aQ&
} R@c])\^]
} )OI}IWDl