[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; 6ek;8dL
} |4T!&[r
int i1=l; AgFVv5
int i2=mid+1; A8pIs
for(int cur=l;cur<=r;cur++){ =|I>G?g-
if(i1==mid+1) 5m9*85Ib
data[cur]=temp[i2++]; _io+YzS
else if(i2>r) r6&54f
data[cur]=temp[i1++]; ADpmvW f?
else if(temp[i1] data[cur]=temp[i1++]; o(S{VGi,
else M@?xa/E64
data[cur]=temp[i2++]; hir4ZO%Zt
} kAu+zX>S+
} >y[oP!-|P
Iz ;G*W18
} .h9l7 nZt
91$]Qg,lB
改进后的归并排序: 'B@e8S)y
G}FIjBE
package org.rut.util.algorithm.support; (;q\}u
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import org.rut.util.algorithm.SortUtil; |fSe>uVZ
7vABq(
/** k'#(1(xj
* @author treeroot {%IExPJ
* @since 2006-2-2 ]p;FZ4-T
* @version 1.0 >2]JXLq
*/ '1$!jmY
public class ImprovedMergeSort implements SortUtil.Sort { h=(DX5:A
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private static final int THRESHOLD = 10; 4H|(c[K;
tUgEeh6
/* 55;g1o}}f
* (non-Javadoc) ]ut5S>,"
* dw TMq*e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3"G>>nC&
*/ [+OnV&
public void sort(int[] data) { 2AtLyN'.
int[] temp=new int[data.length]; qQ0cJIISb\
mergeSort(data,temp,0,data.length-1); QK+(g,)_86
} Op>%?W8/UF
bd<m%OM""
private void mergeSort(int[] data, int[] temp, int l, int r) { 04*6(L)h*
int i, j, k; (sQr X{~
int mid = (l + r) / 2; bzvh%RsW
if (l == r) {'AWZ(
return; >-O/U5<!
if ((mid - l) >= THRESHOLD) !vk|<P1
mergeSort(data, temp, l, mid); #vzEu )Ul
else 1?| flK
insertSort(data, l, mid - l + 1); P9S2?Q
if ((r - mid) > THRESHOLD) wN2QK6Oc
mergeSort(data, temp, mid + 1, r); I8QjKI (
else ;L,mBQB?0b
insertSort(data, mid + 1, r - mid); 9JWa$iBH@
MNg^]tpf
for (i = l; i <= mid; i++) { STglw-TC\
temp = data; aDehqP6vf
} zLF?P3^
for (j = 1; j <= r - mid; j++) { ^mb[j`CCt
temp[r - j + 1] = data[j + mid]; TARXx>
} XfKo A0
int a = temp[l]; 1Jj Y!
int b = temp[r]; ,:%"-`a%
for (i = l, j = r, k = l; k <= r; k++) { e#B#B
if (a < b) { D)@YI.T
data[k] = temp[i++]; B}eA\O4}I
a = temp; meCC?YAB
} else { |Xw/E)jA
data[k] = temp[j--]; '*Almv{
b = temp[j]; &EM\CjKv"
} de]zT^&C
} *A~ G_0B
} Vf`7V$sr
FVKW9"AyW
/** I"1;|`L~:
* @param data h1(j2S`:
* @param l E( h<$w8s
* @param i LPwT^zV&N
*/ gh>>Ibf
private void insertSort(int[] data, int start, int len) { ?X-)J=XG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3&x-}y~sg
} rS0DSGDq
} suH&jE$x
} .^bft P\
} .@"q$\
;r/;m\V
堆排序： 5~.ZlGd
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package org.rut.util.algorithm.support; KK,Z"){
WO6/X/#8b
import org.rut.util.algorithm.SortUtil; 4G@nZn
)XfzLF7
/** X]loJoM9
* @author treeroot DOz\n|8S
* @since 2006-2-2 {ls+dx/
* @version 1.0 p7ir*r/2
*/ Fxc)}i`
public class HeapSort implements SortUtil.Sort{ \]9.zlB
hfcIvs/!
/* (non-Javadoc) 5/QRL\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /j"sS2$U
*/ 3M0+"l(X
public void sort(int[] data) { ?%O3Oi Xz
MaxHeap h=new MaxHeap(); kGkA:g:
h.init(data); y{9~&r
for(int i=0;i h.remove(); 0GDvwy D1
System.arraycopy(h.queue,1,data,0,data.length); nJ?^?M'F%
} $hR)i
^+SkCO
private static class MaxHeap{ Og%U
Gq#~vr
void init(int[] data){ J!ntXF
this.queue=new int[data.length+1]; XI Jlc~2
for(int i=0;i queue[++size]=data; ?8,%LIQ?
fixUp(size); OOBhbpg!D
} '<iK*[NW
} nH !3(X*
QMo}W{D
private int size=0; OndhLLz
_)$PKOzbb
private int[] queue; QIB>rQCceo
hIJ)MZU|
public int get() { 7:NmCpgL!
return queue[1]; 0(8H;T
} ":Edu,6O
V2|3i}V"
public void remove() { rSP_:}
SortUtil.swap(queue,1,size--); B6}FIg)
fixDown(1); 7?"y{R>E
} 5wC* ?>/
file://fixdown s|bM%!$1
private void fixDown(int k) { W&"|}Pi/
int j; Uf*EJ1Ei
while ((j = k << 1) <= size) { nL]^$J$
if (j < size %26amp;%26amp; queue[j] j++; L3(^{W]|
if (queue[k]>queue[j]) file://不用交换 /"qcl7F
break; ?lCd{14Mkh
SortUtil.swap(queue,j,k); ! o,5h|\
k = j; C.!_]Pxs
} 2_QN&o ~h
} IxDWJ#k
private void fixUp(int k) { oCi ~P}r
while (k > 1) { > ^[z3T
int j = k >> 1; Ja^ 5?Ar|
if (queue[j]>queue[k]) g+zJ?
break; x;BbTBc>
SortUtil.swap(queue,j,k); ^%oUmwP<$
k = j; cX2^wu
} cm>E[SHr
} zjX7C~h^Q
1ywU@].6J]
} jkrx]`A{~
@u4=e4eF`
} U!q[e`B
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SortUtil： q(z7~:+qNr
#'o7x'n^
package org.rut.util.algorithm; Sg*0[a3z
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import org.rut.util.algorithm.support.BubbleSort; EH9Hpo
import org.rut.util.algorithm.support.HeapSort; %EbiMo ]3B
import org.rut.util.algorithm.support.ImprovedMergeSort; L0h G
import org.rut.util.algorithm.support.ImprovedQuickSort; W5DbFSgB
import org.rut.util.algorithm.support.InsertSort; =LH}YUmd
import org.rut.util.algorithm.support.MergeSort; q7]>i!A
import org.rut.util.algorithm.support.QuickSort; @6xGJ,s
import org.rut.util.algorithm.support.SelectionSort; \MYU<6{u
import org.rut.util.algorithm.support.ShellSort; @] .VQ<X|0
U1m\\<,
/** j64 4V|z
* @author treeroot B1T5f1;uY
* @since 2006-2-2 D,W\ gP/h%
* @version 1.0 w{7ji}
*/ M23&<}Q8
public class SortUtil { [Z}B"
public final static int INSERT = 1; .;Y x*]
public final static int BUBBLE = 2; bejGfc
public final static int SELECTION = 3; Z$2L~j"=!
public final static int SHELL = 4; LdTIR]
public final static int QUICK = 5; I"Q<n[g0'
public final static int IMPROVED_QUICK = 6; 5j[#'3TSU
public final static int MERGE = 7; Kmry=`=A
public final static int IMPROVED_MERGE = 8; QPg2Y<2
public final static int HEAP = 9; ckwF|:e7*
5d 5t9+t
public static void sort(int[] data) { ]tVl{" .{
sort(data, IMPROVED_QUICK); 1Ii| {vR
} OlcP(
private static String[] name={ %-^}45](q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x0x $ 9
}; Qb@eK$wo}
3q~Fl=|.o
private static Sort[] impl=new Sort[]{ [@.B4p
new InsertSort(), Mvof%I
new BubbleSort(), -Cj_B\
new SelectionSort(), [h", D5
new ShellSort(), v>I<|
new QuickSort(), ?M"HXu
new ImprovedQuickSort(), <9 },M
new MergeSort(), 3}4#I_<$F@
new ImprovedMergeSort(), nVTM3Cz
new HeapSort() d^SE)/j
}; ,kE=TR.|
SKxe3
public static String toString(int algorithm){ 3/tJDb5
return name[algorithm-1]; `@\^m_!}
} u%aFb*
44Qk;8*
public static void sort(int[] data, int algorithm) { RUc\u93n
impl[algorithm-1].sort(data); q]ZSjJ
} Iv1c4"
0Q3YN(
public static interface Sort { ;&`:|Hf*
public void sort(int[] data); S-P{/;c@
} ^je528%H
XW:%vJu^`
public static void swap(int[] data, int i, int j) { }z{wQ\
int temp = data; @ay|]w
data = data[j]; UC#"=Xd4
data[j] = temp; ReqE?CeV
} E@]sq A
} V Qh/