[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; *>fr'jj1$
} /VR~E'Cy%
int i1=l; An2>]\L
int i2=mid+1; {!,K[QwcI
for(int cur=l;cur<=r;cur++){ VKa+[
if(i1==mid+1) x}G:n[B7_V
data[cur]=temp[i2++]; "t|)Kl
else if(i2>r) F^,:p.ihm<
data[cur]=temp[i1++]; g*k)ws
else if(temp[i1] data[cur]=temp[i1++]; Tigw+2
else zJQh~)
data[cur]=temp[i2++]; ZL|aB886
} Bdo{zv&A
} eORXyh\K
.?}M(mL
} y)kxR
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改进后的归并排序: $8^Hkxy
8/e-?2l
package org.rut.util.algorithm.support; :Cq73:1\B
_^ hg7&dF
import org.rut.util.algorithm.SortUtil; zB.cOMx
I}f`iBG
/** :{u`qi
* @author treeroot qS?o22
* @since 2006-2-2 >$q
* @version 1.0 7_~ A*LM
*/ pcMzLMG<
public class ImprovedMergeSort implements SortUtil.Sort { Cqd\n#d/~
D4%J!L<P
private static final int THRESHOLD = 10; %=**cvVy
\`Hp/D1
/* c^}G=Z1@
* (non-Javadoc) Ejug2q
* (p]FI#y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "vGh/sXW
*/ Q2 q~m8(
public void sort(int[] data) { !Asncc G
int[] temp=new int[data.length]; ]4aPn
mergeSort(data,temp,0,data.length-1); gL<n?FG4b
} 2A_1E\
$dfc@Fn^x
private void mergeSort(int[] data, int[] temp, int l, int r) { *p/,Z2f
int i, j, k; O_QDjxj^rZ
int mid = (l + r) / 2; o30C\
if (l == r) Q68~D.V%r
return; r1!1u7dr t
if ((mid - l) >= THRESHOLD) yr\ClIU
mergeSort(data, temp, l, mid); h<9vm[.
else =O}I{dNKZV
insertSort(data, l, mid - l + 1); ERPg TZT
if ((r - mid) > THRESHOLD) j!+jLm!l
mergeSort(data, temp, mid + 1, r); pRQ7rT',v
else KL \>-
insertSort(data, mid + 1, r - mid); ~5 6&!4
=.`\V]
for (i = l; i <= mid; i++) { Yxq!7J
temp = data; t/ \S9
} /2Izj/Q
for (j = 1; j <= r - mid; j++) { +4yre^gC
temp[r - j + 1] = data[j + mid]; v3"6'.f;bY
} il^;2`]&
int a = temp[l]; IfmQPs+f
int b = temp[r]; e!6yxL*[@[
for (i = l, j = r, k = l; k <= r; k++) { ?]><#[?'L
if (a < b) { /LFuf`bXV
data[k] = temp[i++]; X>I3N?5
a = temp; /&Q{B f
} else { ;nSF\X(;{
data[k] = temp[j--]; k4Q>J,k
b = temp[j]; B*tYp
} B:h<iU:'D
} izP)t
} I>?oVY6M@u
(zsG!v
/** mZ71_4X#
* @param data ;6/WjUDw<|
* @param l s)Y1%#
* @param i J9lZ1,22
*/ `cp\UH@
private void insertSort(int[] data, int start, int len) { !E$$FvL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5L3+KkX@
} 2E }vuw=c
} .B]l@E-u
} ||hQ*X<m>
} gqS9{K(f
"pkdZ
堆排序： TuQGF$n@
#@FA=p[%
package org.rut.util.algorithm.support; i~h@}0WR"
cWAw-E5
import org.rut.util.algorithm.SortUtil; )$]lf }
f<8Hvumw
/** ZWkRoJXNi
* @author treeroot Au,oX2$
* @since 2006-2-2 ZVgfrvZP
* @version 1.0 )- W1Wtom
*/ %u!=<yn'
public class HeapSort implements SortUtil.Sort{ G _cJI
3}nk9S:jr
/* (non-Javadoc) Ef]Hpjvp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uzdPA'u
*/ :|;@FkQ
public void sort(int[] data) { $z=%e#(!I
MaxHeap h=new MaxHeap(); G(t:s5:
h.init(data); krfXvQJwJ
for(int i=0;i h.remove(); r *K
System.arraycopy(h.queue,1,data,0,data.length); v@zi?D K
} !AwMD
%jHm9{|X
private static class MaxHeap{ `n$Ak5f
s#Dj>Fej
void init(int[] data){ r,;ca6>5H
this.queue=new int[data.length+1]; `=Ip>7T&
for(int i=0;i queue[++size]=data; IQJ"B6U)
fixUp(size); j4IVIj@$`
} {JfQQP&FV
} E`TZ:W]r,
1gHe$dzXk
private int size=0; !R8%C!=a
aEN` `
private int[] queue; :9QU\{2
qA[lL(
public int get() { ZeV@ X
return queue[1]; .\caRb[
} jZ.yt+9
ox&5}&\
public void remove() { )M0`dy{1
SortUtil.swap(queue,1,size--); [-\Y?3
fixDown(1); SXw r$)4_
} m4m-JD|v
file://fixdown SrKitSG
private void fixDown(int k) { J2qsZ
int j; _9>,9aL
while ((j = k << 1) <= size) { .,u>WIUxj
if (j < size %26amp;%26amp; queue[j] j++; eDpi0htm
if (queue[k]>queue[j]) file://不用交换 Wx0i_HFR
break; ^(JrOh'
SortUtil.swap(queue,j,k); Pk;w.)kT
k = j; c+l1l0BA
} ;VLDXvGd
} D|OGlP
private void fixUp(int k) { CmB_g?K
while (k > 1) { (}b~}X9
int j = k >> 1; !` 1h *}
if (queue[j]>queue[k]) I<2`wL=
break; 7RT{RE
SortUtil.swap(queue,j,k); ]~;*9`:
k = j; 3#t9pI4
} |!(8c>]Bo
} k1,k 9BK
_\>y[e["p
} yepRJ%mp
>n,_Aj c
} JA4Zg*7I
+nR("Il
SortUtil： [<=RsD_q~
+c_AAMe
package org.rut.util.algorithm; }tt%J[
/D"T\KNWr
import org.rut.util.algorithm.support.BubbleSort; E6GubU
import org.rut.util.algorithm.support.HeapSort; u[qy1M0
import org.rut.util.algorithm.support.ImprovedMergeSort; "22./vWV|i
import org.rut.util.algorithm.support.ImprovedQuickSort; mH,s!6j?Vp
import org.rut.util.algorithm.support.InsertSort; TzC(YWt
import org.rut.util.algorithm.support.MergeSort; .Vt|;P}
import org.rut.util.algorithm.support.QuickSort; &m5^ YN$b
import org.rut.util.algorithm.support.SelectionSort; 2M+RA}dX
import org.rut.util.algorithm.support.ShellSort; @ fMlbJq
G5qsnTxUJ
/** &3/`cl[+
* @author treeroot s>;"bzzq
* @since 2006-2-2 \zJ^XpC
* @version 1.0 ^(&2
*/ ANPG3^w
public class SortUtil { F-@yH
public final static int INSERT = 1; !}c D e12
public final static int BUBBLE = 2; 8GxT!
public final static int SELECTION = 3; ybJa:
public final static int SHELL = 4; ]}SV%*{%
public final static int QUICK = 5; yHM29fEZk
public final static int IMPROVED_QUICK = 6; hak#Iz0[C
public final static int MERGE = 7; 0(&uH0x
public final static int IMPROVED_MERGE = 8; p3fVw]N
public final static int HEAP = 9; ,dba:D=l
NZ`6iK-V_
public static void sort(int[] data) { F@/syX;bb5
sort(data, IMPROVED_QUICK); NHZMH!=4:n
} lU|ltnU
private static String[] name={ |QzJHP @
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w8o?wx*
}; N+SA$wG
.aZB?MW
private static Sort[] impl=new Sort[]{ ^ &KH|qRrO
new InsertSort(), Ypm*or
new BubbleSort(), #O^zA`D
new SelectionSort(), @W+8z#xr'
new ShellSort(), p"\-iY]
new QuickSort(), fR.raI4et
new ImprovedQuickSort(), |RpZr!3V
new MergeSort(), ?{Xp'D\z
new ImprovedMergeSort(), zh !/24p9
new HeapSort() FlS)m`
}; oi3Ix7
g'L$m|
public static String toString(int algorithm){ AF{o=@
return name[algorithm-1]; :\#]uDT2=
} w*SFQ_6YE
kGq<Zmy|
public static void sort(int[] data, int algorithm) { t[%=[pJHW
impl[algorithm-1].sort(data); YS"76FJ
} HV3wUEI3
h^9Ne/s~
public static interface Sort { 43J8PMY
public void sort(int[] data); Sdmynuv U
} ]*S_fme
XeBSHvO_
public static void swap(int[] data, int i, int j) { N_!Zn"J
int temp = data; 9]8M{L
data = data[j]; Q!%CU8!`&
data[j] = temp; E{9{%J
} cmh/a~vYaY
} 6ud<B