[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; k1Thjt
} g|PRk9
int i1=l; a C<
int i2=mid+1; =P\Tk)(`
for(int cur=l;cur<=r;cur++){ kMY1Xb
if(i1==mid+1) [_wenlkm
data[cur]=temp[i2++]; "`8~qZ7k
else if(i2>r) ju{\7X5
data[cur]=temp[i1++]; "Zq)y_1
else if(temp[i1] data[cur]=temp[i1++]; c6Z\ecH9
else m(?ZNtBQt
data[cur]=temp[i2++]; 55]E<2't
} %_%/ym
} UCF'%R
RYem(%jq
} i*-L_!cc:
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改进后的归并排序: >lIQM3
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package org.rut.util.algorithm.support; F1UTj"<e
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import org.rut.util.algorithm.SortUtil; -cW'g
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/** n%1I}?$fO
* @author treeroot i%eq!q
* @since 2006-2-2 `U[s d*C"
* @version 1.0 VQ((c:+!
*/ 6e.?L
public class ImprovedMergeSort implements SortUtil.Sort { BmGY#D,
P]b *hC
private static final int THRESHOLD = 10; 8*t8F\U#
FqpUw<]6s
/* SBynu
* (non-Javadoc) +X&b
* Zr U9oy&!C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?*h2:a$
*/ &mJ +#vT
public void sort(int[] data) { h8me.=S&
int[] temp=new int[data.length]; g(Dr/D
mergeSort(data,temp,0,data.length-1); S LSbEm
} }HC6m{vH(
\vQjTM-7
private void mergeSort(int[] data, int[] temp, int l, int r) { v;m}<3@'
int i, j, k; tjIT4
int mid = (l + r) / 2; ="*:H)
if (l == r) ;)nV
return; ~xSAR;8
if ((mid - l) >= THRESHOLD) ollk {N
mergeSort(data, temp, l, mid); sq~9 l|F
else A:-r2;xB
insertSort(data, l, mid - l + 1); q!+&|F
if ((r - mid) > THRESHOLD) d5O_~xf&
mergeSort(data, temp, mid + 1, r); IxQ(g#sj_k
else gZLzE*NZ
insertSort(data, mid + 1, r - mid); 5o&noRIIr
gN("{j1Q
for (i = l; i <= mid; i++) { @ZUrr_|
temp = data; 6*]g~)7`Q~
} 50l!f7
for (j = 1; j <= r - mid; j++) { ,-GkP>8f(
temp[r - j + 1] = data[j + mid]; Ja@zeD)f"
} wQV[ZfU^h
int a = temp[l]; CMI V"-
int b = temp[r]; ~7}aW#
for (i = l, j = r, k = l; k <= r; k++) { bXw!fYm&
if (a < b) { [~[)C]-=
data[k] = temp[i++]; RZg8y+jM
a = temp; 5!pof\/a
} else { NEb M>1>^
data[k] = temp[j--]; ZFNn(n
b = temp[j]; ^UEExjf
} c'8pTP%[
} c4'k-\JvT
} jLZ^EM-
{r,MRZaa
/** !lk -MN.
* @param data :4V8Iz 71
* @param l ".Q``d&X
* @param i bI_T\Eft
*/ +KzbaBK
private void insertSort(int[] data, int start, int len) { qP}187Q1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ev}ugRxt|k
} (WISf}[l;
} z9B""ws
} x&kM /z?/
} ?{Rv/np=F
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堆排序： CC8)yO
-xXz}2S4
package org.rut.util.algorithm.support; :47bf<w|Y
5@kNvi
import org.rut.util.algorithm.SortUtil; <V~B8C!)
~7$4w# of0
/** _,?<r&>v6
* @author treeroot KT>eE
* @since 2006-2-2 oN\IQ7oI
* @version 1.0 \pVmSac,
*/ Ww[Xqmg
public class HeapSort implements SortUtil.Sort{ q|}%6ztv-
Q^H8gsv
/* (non-Javadoc) (1pR=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m'b9 f6
*/ Sl!#!FGI
public void sort(int[] data) { ,Y\`n7Ww
MaxHeap h=new MaxHeap(); !d)Vr5x
h.init(data); w I7iE4\vz
for(int i=0;i h.remove(); 26&$vgO~:
System.arraycopy(h.queue,1,data,0,data.length); oE H""Bd
} 9[5qN!P;y
[@&0@/s*t'
private static class MaxHeap{ U_8 Z&
fVXZfq6
void init(int[] data){ 6` 8H k;
this.queue=new int[data.length+1]; bl8EzO
for(int i=0;i queue[++size]=data; FkH HTO
fixUp(size); =,])xzG%
} Biva{'[m
} RI[=N:C^
#aeKK7[
private int size=0; `Nnaw+<]
=1vl-*uYh
private int[] queue; Nf!g1D"U
EDA%qNd]j
public int get() { S#{jyU9 ]
return queue[1]; KmYSYNr@,
} v/m} {&K
R_7[7/a
public void remove() { wigs1
SortUtil.swap(queue,1,size--); jGSY$nt9
fixDown(1); S <RbC
} n?[JPG2X
file://fixdown i0TbsoKh:
private void fixDown(int k) { (\8~W*ej"
int j; RXD*;B$v
while ((j = k << 1) <= size) { X>la!}sV
if (j < size %26amp;%26amp; queue[j] j++; UD!-.I]
if (queue[k]>queue[j]) file://不用交换 dKk#j@[n"
break; H:k?#7D(
SortUtil.swap(queue,j,k); yZ:AJNb
k = j; i!a.6Gq
} )/y7Fh
} 3OlXi9>3
private void fixUp(int k) { z]%c6ty
while (k > 1) { 0aRHXc2<
int j = k >> 1; 'nMj<:0wlD
if (queue[j]>queue[k]) &}y?Lt
break; #hZ`r5GvTj
SortUtil.swap(queue,j,k); q^w@l
k = j; P2!+ZJ&
} 28! ke
} "M!]t,?S
f'oO/0lx
} sOyL
^cnTZzT#Q
} V"Sa9P{y"
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SortUtil： euyd(y$'k
j6:jN-z
package org.rut.util.algorithm; =`KA@~XH4
;xl0J*r
import org.rut.util.algorithm.support.BubbleSort; \V_Tc`
import org.rut.util.algorithm.support.HeapSort; hjgB[ &U>
import org.rut.util.algorithm.support.ImprovedMergeSort; W<@9ndvH
import org.rut.util.algorithm.support.ImprovedQuickSort; +Zg@X.z
import org.rut.util.algorithm.support.InsertSort; DP8%/CV!*
import org.rut.util.algorithm.support.MergeSort; lS96Z3k"SB
import org.rut.util.algorithm.support.QuickSort; Due@'
import org.rut.util.algorithm.support.SelectionSort; }1#prQ0F
import org.rut.util.algorithm.support.ShellSort; YZk.{#^c
XkhGU?={
/** =G9I7Y@
* @author treeroot rk-GQ#SKU
* @since 2006-2-2 fpa~~E-
* @version 1.0 :OFs"bC
*/ PWBcK_4i%
public class SortUtil { KDS}"/
public final static int INSERT = 1; KjNA PfL
public final static int BUBBLE = 2; /os,s[w
public final static int SELECTION = 3; }3}H}
public final static int SHELL = 4; aJ"m`5]=%
public final static int QUICK = 5; *N&~Uq^
public final static int IMPROVED_QUICK = 6; % aqP{mOO
public final static int MERGE = 7; &"?S0S>r!
public final static int IMPROVED_MERGE = 8; bgYUsc*uR
public final static int HEAP = 9; NXCvS0/h
='t}d>l
public static void sort(int[] data) { %XBMi~
sort(data, IMPROVED_QUICK); Nl'@Y^8N
} Lb,wn{
private static String[] name={ d.0K~M
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z0[d;m*
}; ]Zz.n5c
ueyQ&+6r
private static Sort[] impl=new Sort[]{ 2}n7f7[/b
new InsertSort(), )~0TGy|
new BubbleSort(), mKBO<l{S
new SelectionSort(), X`fb\}~R(
new ShellSort(), cN-$;Ent
new QuickSort(), jVPX]8
new ImprovedQuickSort(), c`@";+|r
new MergeSort(), PbnAY{J
new ImprovedMergeSort(), rS!M0Hq>t
new HeapSort() a*&(cn
}; q5G`q&O5
{e5DQ21.
public static String toString(int algorithm){ iax0V
return name[algorithm-1]; bd\%K`JQ{
} s1]m^,
G}Ko*:fWS
public static void sort(int[] data, int algorithm) { ?C`r3
impl[algorithm-1].sort(data); *XOLuPL>6)
} X;1yQ|su
Ms#rvn!J
public static interface Sort { p,.6sk
public void sort(int[] data); aJQzM
} ?<` ;lu/eL
9:*[Q"v
public static void swap(int[] data, int i, int j) { 6>]w1 H
int temp = data; ;0U*N& f
data = data[j]; %P7qA
data[j] = temp; |\W53,n9
} |R2p^!m
} pm=m~