[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; 7Vuf4Z5
} gs&F .n
int i1=l; nrR2U`
int i2=mid+1; K >Q6
for(int cur=l;cur<=r;cur++){ OAaLCpRp
if(i1==mid+1) Dq-[b+bm
data[cur]=temp[i2++]; aeDhC#h
else if(i2>r) .{-X1tJ7
data[cur]=temp[i1++]; ?2q0[T?e
else if(temp[i1] data[cur]=temp[i1++]; V\AY=u
else ZiPz~G0[^
data[cur]=temp[i2++]; \Vpv78QF;
} $Gcjm~
} *z};&UsF{
I|wC`VgB
} s>)?MB*vb
h; 6G~D
改进后的归并排序: fw5+eTQ^
PQUJUs
package org.rut.util.algorithm.support; #jsN
5uV_Pkb?8
import org.rut.util.algorithm.SortUtil; #pyFIUr=w
RL[F 9g
/** xo4lM
* @author treeroot v\E6N2.S
* @since 2006-2-2 Zs8]A0$
* @version 1.0 <7! "8e
*/ ,w f6gmh8
public class ImprovedMergeSort implements SortUtil.Sort { V.ETuS;
Et y?/
private static final int THRESHOLD = 10; Ezev ^O]
?*.:*A
/* !ST7@D
* (non-Javadoc) {9* l
* T-h[$fxR_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +F.@n_}p-I
*/ SLNq%7apx
public void sort(int[] data) { YP[8d,
int[] temp=new int[data.length]; UXh%DOq
mergeSort(data,temp,0,data.length-1); B6@q`Bmw.
} VK!HuO9l
P 5.@LN
private void mergeSort(int[] data, int[] temp, int l, int r) { qMoo#UX
int i, j, k; -3 Sb%V\
int mid = (l + r) / 2; ]$#9B-uB
if (l == r) SAdo9m'
return; -q8l"i>h=
if ((mid - l) >= THRESHOLD) ^j2ve's:
mergeSort(data, temp, l, mid); L c )i
else >cpv4Pgm
insertSort(data, l, mid - l + 1); Vl3-cW@p
if ((r - mid) > THRESHOLD) .IM]B4m
mergeSort(data, temp, mid + 1, r); 9GsG*$-I
else f^KN8N
insertSort(data, mid + 1, r - mid); X(BX+)YR
M!i*DU+SE
for (i = l; i <= mid; i++) { *sau['Ha
temp = data; fg lN_
} ox_DEg7l
for (j = 1; j <= r - mid; j++) { R"l6|9tmP
temp[r - j + 1] = data[j + mid]; B_D0yhh
} zeq")A
int a = temp[l]; {{B'65Wu
int b = temp[r]; zhbSiw
for (i = l, j = r, k = l; k <= r; k++) { S}cR+d1}h
if (a < b) { ~2nt33"
data[k] = temp[i++]; SurreD<x
a = temp; ?:&2iW7z
} else { @^DVA}*b)
data[k] = temp[j--]; e"*1l>g
b = temp[j]; $:# :"
} w~&#:F?
} 6(x53y__
} m#R"~ >
Qv g_|~n
/** |ICn/r~
* @param data >&ZlCE
* @param l `7'^y
* @param i ^>>9?
*/ ,F*HZBNFZ
private void insertSort(int[] data, int start, int len) { A,xPA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5%4yUd#b
} ,CN(;z)
} >ts}\.(]
} R]o0V*n
} Z9MR"!0
O}(sn
堆排序： {p$@)b
2(x| %
package org.rut.util.algorithm.support; X @pm!c#
ExN$J
import org.rut.util.algorithm.SortUtil; t: oQHhO?
gz~ug35
/** Jt#HbAY
* @author treeroot KhP_U{)D
* @since 2006-2-2 U&{w:P
* @version 1.0 8aC=k@YE
*/ _n!>*A!
public class HeapSort implements SortUtil.Sort{ Kv9FqrDj
kM[!UOnC!<
/* (non-Javadoc) )q.ZzijG/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8 R7w$3pp\
*/ , s otZT
public void sort(int[] data) { 7h0u7N
MaxHeap h=new MaxHeap(); q@~{g[
h.init(data); p~Cz6n
for(int i=0;i h.remove(); 7+}WU4
System.arraycopy(h.queue,1,data,0,data.length); R'6(eA[K
} |z"$^|@d?
[b&V^41W
private static class MaxHeap{ 4mKH |\g
SSTn|
void init(int[] data){ *M*WjEOA
this.queue=new int[data.length+1]; xWqV~NnE
for(int i=0;i queue[++size]=data; `p1B58deC
fixUp(size); k Jw Pd;%
} Aqz $WTHW+
} tIV{uVM[|D
2y|n!p T
private int size=0; $Ff6nc=
T31F8K3x
private int[] queue; a7uL{*ZR
jIwN,H1$-
public int get() { ){z#Y#]dP
return queue[1]; tw=A] a*
} k.2GIc:5
9;uH}j8sE
public void remove() { u8<[Q]5
SortUtil.swap(queue,1,size--); 8~yP?#p
fixDown(1); UjLq[,_!
} BOR$R}q
file://fixdown g kV`ZT9
private void fixDown(int k) { [s\8@5?E
int j; c0HPS9N\
while ((j = k << 1) <= size) { tCoE4Ed
if (j < size %26amp;%26amp; queue[j] j++; p&u\gSo
if (queue[k]>queue[j]) file://不用交换 =cb!2%?}
break; Y2'HP)tfIw
SortUtil.swap(queue,j,k); rBU)@IpDG
k = j; .qKfhHJ
} o8H\l\(
} 98| v.d
private void fixUp(int k) { FGie*t
while (k > 1) { >R_m@$`
int j = k >> 1; \ykA7Y%
if (queue[j]>queue[k]) 6d6Dk>(V
break; Q4*{+$A
SortUtil.swap(queue,j,k); &/2+'wCp5
k = j; "L`BuAB
} {O).!
} 2L[!~h2
2<h~: L
} gR gB= C{
D5({&.X[-
} 8z7eL>)
PhV/WjCZ
SortUtil： X8}\m%gCU
*GY8#Az
package org.rut.util.algorithm; =Ti@Y
z_'!?K{
import org.rut.util.algorithm.support.BubbleSort; t^>P,%$
import org.rut.util.algorithm.support.HeapSort; V2AsZc0U(
import org.rut.util.algorithm.support.ImprovedMergeSort; =8TBkxG
import org.rut.util.algorithm.support.ImprovedQuickSort; ;I80<SZ
import org.rut.util.algorithm.support.InsertSort; :f%kkatO
import org.rut.util.algorithm.support.MergeSort; 2~7*jA+Ab
import org.rut.util.algorithm.support.QuickSort; @$L|
import org.rut.util.algorithm.support.SelectionSort; ePl+ M
import org.rut.util.algorithm.support.ShellSort; [\ Sd*-
e-UWbn'~
/** )*6
* @author treeroot #H4<8B
* @since 2006-2-2 a5O$he
* @version 1.0 0H.bRk/P+
*/ f%1\1_^g
public class SortUtil { 7fzH(H
public final static int INSERT = 1; M #0v# {o
public final static int BUBBLE = 2; PX0N7L
public final static int SELECTION = 3; fF>hca>
public final static int SHELL = 4; N?#L{Yt
public final static int QUICK = 5; Zn40NKYc
public final static int IMPROVED_QUICK = 6; t2.jg?`k
public final static int MERGE = 7; E BoC,{R#
public final static int IMPROVED_MERGE = 8; mA%}ijR6y
public final static int HEAP = 9; ,'t&L]
d8R|0RZ
public static void sort(int[] data) { #*lDKn[vO
sort(data, IMPROVED_QUICK); q[W@.[2y)
} uHbbPtk
private static String[] name={ VPuo!H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" p\#;(pf}s
}; 'rFLG+W
[+CFQf>
private static Sort[] impl=new Sort[]{ ]\>MDH
new InsertSort(), ubsv\[:C
new BubbleSort(), UHTxNK@}
new SelectionSort(), b"}ya/
new ShellSort(), O'^AbO=,
new QuickSort(), s!yD%zO
new ImprovedQuickSort(), /NR*<,c%
new MergeSort(), QhAYCw2
new ImprovedMergeSort(), uh#E^~5S
new HeapSort() a #s Nd
}; <;>k[P'
$Jn.rX0}$
public static String toString(int algorithm){ OEzSItAI/[
return name[algorithm-1]; xO%yjG=
} >b#CR/^z
X}h}3+V
public static void sort(int[] data, int algorithm) { fpjFO&ML
impl[algorithm-1].sort(data); .wWf#bB
} 8@rF~^-_
.#a7?LUH
public static interface Sort { |a /cw"
public void sort(int[] data); %iYro8g!,
} +!`$(
Ln+ k_
public static void swap(int[] data, int i, int j) { *!Gb_!98
int temp = data; ;[g~h |{6
data = data[j]; A,4} $-7
data[j] = temp; =z<sx2#*
} `'mRGz7t
} [xGL0Z%)t