[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; tkcs6uy
} oC49c~`8
int i1=l; znTi_S
int i2=mid+1; 1<73uR&b%
for(int cur=l;cur<=r;cur++){ >8kXa.)84
if(i1==mid+1) 8$A0q%n
data[cur]=temp[i2++]; ls:oC},p*
else if(i2>r) K_YOp1
data[cur]=temp[i1++]; nL/]Q'(5
else if(temp[i1] data[cur]=temp[i1++]; 1J/'R37lP
else 2O[sRm)
data[cur]=temp[i2++]; =hFY-~U
} $7DW-TA
} l7qW)<r
MkoK(m{7
} ;]Q6K9.d8
bV&9>fC
改进后的归并排序: (~zu4^9w
2<I=xWwFA
package org.rut.util.algorithm.support; :M6v<Kg{;
yT_W\"=8
import org.rut.util.algorithm.SortUtil; `}#rcDK
=FhP$r*
/** \8QOZjy
* @author treeroot ./k7""4
* @since 2006-2-2 _8u TK%|
* @version 1.0 I ]ZZN6"
*/ *YeQCt-l
public class ImprovedMergeSort implements SortUtil.Sort { jBYvOy*$Q
S\8v)|Pr
private static final int THRESHOLD = 10; eN,9N]K
ga%\n!S
/* 2vjkThh`I
* (non-Javadoc) ?#=xx.cF
* .waw=C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'Tjvq%ks
*/ "nu]3zcd
public void sort(int[] data) { sb{K%xi%
int[] temp=new int[data.length]; O%\cRn8m
mergeSort(data,temp,0,data.length-1); zvdut ,6<
} [m0X kvd
[5?Dov^j3
private void mergeSort(int[] data, int[] temp, int l, int r) { MVzuE}
int i, j, k; f1ANziC;i
int mid = (l + r) / 2; GT<oYrjU
if (l == r) XlU\D}zS
return; "Esl I
if ((mid - l) >= THRESHOLD) K$h\<_V
mergeSort(data, temp, l, mid); y'!OA+ob
else H)D|lt5xy
insertSort(data, l, mid - l + 1); %T]^,y$n
if ((r - mid) > THRESHOLD) K9k!P8Rd
mergeSort(data, temp, mid + 1, r); Q*>)W{H&)
else x5Lbe5/P
insertSort(data, mid + 1, r - mid); +mVAmG@
3Xu|hkK\e
for (i = l; i <= mid; i++) { ~#3{5* M
temp = data; M.mn9kw`
} ewk7:zS/?
for (j = 1; j <= r - mid; j++) { F1@Po1VTD
temp[r - j + 1] = data[j + mid]; kx;X:I(5&P
} 3?*dv14
int a = temp[l]; 2 3PRb<q
int b = temp[r]; -|m3=#
for (i = l, j = r, k = l; k <= r; k++) { JK =A=
if (a < b) { r$={_M$
data[k] = temp[i++]; JFm@jc
a = temp; c}qpmWF
} else { ZDFq=)0C
data[k] = temp[j--]; CXuD%H]tx
b = temp[j]; Yn~fnI{
} c{/R?<
} eW(pP>@k,
} 5 qfvHQ ~M
imYfRi=$
/** H<_Tn$<zH.
* @param data 3s!6rT_=)d
* @param l ^~[7])}g6
* @param i ;pW8a?
*/ M[mYG _{J
private void insertSort(int[] data, int start, int len) { |"SZpx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +QFKaS<sn
} !+PrgIp>
} ISpV={$Zd
} y5j:+2|I
} :.*Q@X}-I
a|u#w~
堆排序： ZTzec zXpQ
G7 UUx+X
package org.rut.util.algorithm.support; ['}|#3*w
ML12&E>
import org.rut.util.algorithm.SortUtil; |KYl'"5\
XZ |L D#
/** :.+w'SEn4M
* @author treeroot {:gx*4}q8
* @since 2006-2-2 HqWWWCWal
* @version 1.0 Zmyq6.1q~
*/ S!8<|WO^t
public class HeapSort implements SortUtil.Sort{ uBbQJvL
.Od:#(aq
/* (non-Javadoc) :b44LXKCP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]%6%rq%9C
*/ k={D!4kKz
public void sort(int[] data) { b\}a
MaxHeap h=new MaxHeap(); U7x
h.init(data); V|'@D#\
for(int i=0;i h.remove(); "mJo<i}
System.arraycopy(h.queue,1,data,0,data.length); lubsLI
} 7#E/Q~]'6
Z{^!z
private static class MaxHeap{ < c^'$
*LB-V%{|'
void init(int[] data){ /+92DV
this.queue=new int[data.length+1]; Cb+sE"x]
for(int i=0;i queue[++size]=data; Z3TCi7,m
fixUp(size); {A0F/#M]
} 6)^*DJy
} \XB,)XDB
swj\X,{
private int size=0; m=6?%' H}
v)du]
private int[] queue; 9Ad%~qciY
1!1JT;gG^9
public int get() { |Gz<I
return queue[1]; ([q>.[WbH]
} V4Rs
{ }/
public void remove() { j_rO_m<8
SortUtil.swap(queue,1,size--); :(~<BiqR(
fixDown(1); nN{DO:_o
} RkG?R3e
file://fixdown P}Ig6^[m\
private void fixDown(int k) { F\JS?zt2
int j; %DiQTg7V,
while ((j = k << 1) <= size) { i 7]o[
if (j < size %26amp;%26amp; queue[j] j++; AJ/Hw>>$?m
if (queue[k]>queue[j]) file://不用交换 4xW~@meNB
break; @JlT*:Dz
SortUtil.swap(queue,j,k); )isS^O$qH
k = j; M]5l-i$
} HMUx/M.j
} Vl1.]'p_
private void fixUp(int k) { VzSkqWF/"
while (k > 1) { lD$s, hp
int j = k >> 1; L8D=F7
if (queue[j]>queue[k]) C,W@C
break; c:K/0zY
SortUtil.swap(queue,j,k); WDY\Fj
k = j; k H65k (
} p_Xfj2E4c
} bnfeZR1m_
: _Y^o
} q,fp DNo
_(f@b1O~
} c(hC'Cp
"T5jz#H#/
SortUtil： qOG@MR(5
4}N+o+
package org.rut.util.algorithm; 15{^waR6
3|$?T|#B
import org.rut.util.algorithm.support.BubbleSort; RgoF4g+@
import org.rut.util.algorithm.support.HeapSort; *m"@*O'
import org.rut.util.algorithm.support.ImprovedMergeSort; DH.`
import org.rut.util.algorithm.support.ImprovedQuickSort; |E K6txRb
import org.rut.util.algorithm.support.InsertSort; RbUir185Y
import org.rut.util.algorithm.support.MergeSort; yam'LF
import org.rut.util.algorithm.support.QuickSort; Qf0P"s`
import org.rut.util.algorithm.support.SelectionSort; w31O~Ve
import org.rut.util.algorithm.support.ShellSort; ^kNVQJiZyG
=Jl\^u%H(x
/** [UkcG9
* @author treeroot ?5">50
* @since 2006-2-2 \_.'/<aQ
* @version 1.0 mL1ZSX o!
*/ 1R-0b{w[
public class SortUtil { 1W*Qc_5 v1
public final static int INSERT = 1; ]Yt3@ug_f
public final static int BUBBLE = 2; gs1
public final static int SELECTION = 3; 53uptQ{
public final static int SHELL = 4; T|\sN*}\8J
public final static int QUICK = 5; |u`YT;`!"-
public final static int IMPROVED_QUICK = 6; MDa[bQNM
public final static int MERGE = 7; n2*Ua/J-8
public final static int IMPROVED_MERGE = 8; CxaI@+
public final static int HEAP = 9; 7Z]?a
h(q4 B~
public static void sort(int[] data) { (1S9+H>g
sort(data, IMPROVED_QUICK); 0 F8xS8vK+
} kN 2mPD/
private static String[] name={ <*iFVjSI(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hlyh8=Z6o
}; LGy62 y$
0e>?!Z E
private static Sort[] impl=new Sort[]{ L~+aD2E {
new InsertSort(), >}.~Y#Ge
new BubbleSort(), ShRMzU
new SelectionSort(), OtL~NTY
new ShellSort(), 7y&=YCkc7
new QuickSort(), O^c?w8
new ImprovedQuickSort(), ;xTMOuI*
new MergeSort(), J8FzQ2
new ImprovedMergeSort(), ,%m~OB#
new HeapSort() dT1UYG}>j
}; XH0{|#hwN
d+P<ce2G
public static String toString(int algorithm){ uF%N`e^S
return name[algorithm-1]; Nc6y]eGz
} *C)m#[#:u
or ~@!
public static void sort(int[] data, int algorithm) { e+Mm!\;`
impl[algorithm-1].sort(data); SN[yC
} $hJ 4=F
.nr%c*JUp
public static interface Sort { x?6^EB|@
public void sort(int[] data); +Rd\*b
} \Q`#E'?
LCRWC`%&
public static void swap(int[] data, int i, int j) { hBZh0xy
int temp = data; :n<l0
data = data[j]; ~>]Ie~E: (
data[j] = temp; fX:G;vYn
} Lo'GfHE
} ~&0lWa