[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; 4+)Zk$E
} S*;#'j)4+
int i1=l; ERk kSTp
int i2=mid+1; J=b*
for(int cur=l;cur<=r;cur++){ rU],J!LF
if(i1==mid+1) ZQ@3P7T
data[cur]=temp[i2++]; 7TP$
else if(i2>r) #g,H("Qy({
data[cur]=temp[i1++]; [`q.A`Fd
else if(temp[i1] data[cur]=temp[i1++]; bSQ_"
else X)I/%{
data[cur]=temp[i2++]; 3QH(4N
} _\p`4-.V
} wyp{KIV
STv(kQs
} \{kHSV%z
EH(tUwY%{
改进后的归并排序: b7Yq_%+
%cS#+aK6M'
package org.rut.util.algorithm.support; ,KT<4
6tX.(/+L
import org.rut.util.algorithm.SortUtil; QI.t&sCh5
C:Vv!u
/** yj>){NcX
* @author treeroot P1$f}K}
* @since 2006-2-2 }Bd_:#.mw
* @version 1.0 xOhRTxic
*/ V!mWn|lf
public class ImprovedMergeSort implements SortUtil.Sort { "@(58nk
OO$|9`a
private static final int THRESHOLD = 10; OthG7+eF
61G|?Aax
/* -P2 @mx%
* (non-Javadoc) {d8^@UL
* k@7kNMl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) anLbl#UV
*/ u]R$]&<
public void sort(int[] data) { {798=pC<.
int[] temp=new int[data.length]; t`uc3ta"9
mergeSort(data,temp,0,data.length-1); (yfXMp,x
} r9<V%PHv
[ ynuj3G V
private void mergeSort(int[] data, int[] temp, int l, int r) { av)?>J~;
int i, j, k; Sq<3Rw
int mid = (l + r) / 2; {Wh BoD
if (l == r) (Bsw/wv
return; STw oYn
if ((mid - l) >= THRESHOLD) bea|?lK
mergeSort(data, temp, l, mid); t~q?lT
else )TM!ms+K
insertSort(data, l, mid - l + 1); %U-Qsy8|D)
if ((r - mid) > THRESHOLD) $]Jf0_
mergeSort(data, temp, mid + 1, r); 6I"C~&dt
else A^8x1ydZ
insertSort(data, mid + 1, r - mid); Mg+4huT
-gB{:UYi3
for (i = l; i <= mid; i++) { !1("(Eb
temp = data; _$!`VA%
} pVY4q0@
for (j = 1; j <= r - mid; j++) { D]jkR} t
temp[r - j + 1] = data[j + mid]; gbJG`zC>U
} &u("|O)w$
int a = temp[l]; sLNNcj(Cy>
int b = temp[r]; Y4`QK+~fH
for (i = l, j = r, k = l; k <= r; k++) { V>AS%lXj
if (a < b) { JfSdUWxT
data[k] = temp[i++]; {b[tA, >
a = temp; hw*1gm
} else { C[R`Ml
data[k] = temp[j--]; +eC3?B8rN
b = temp[j]; uC)Zs, _5
} zqY)dk
} 8+&gp$a$
} 2!BsEvB(
6oYIQ'hc
/** pG~'shD~Dn
* @param data .ByU
* @param l b22LT52
* @param i pcNSL'u+
*/ kwOeHdV^
private void insertSort(int[] data, int start, int len) { y^SyhG,V[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;c$@@l
} 7r['
} 1EQvcw#
} 1c/ X
} K|Om5 p
tR5tPPw
堆排序： K\~v&
zs0hXxTY:
package org.rut.util.algorithm.support; G8noQ_-
2Sjt=LOc="
import org.rut.util.algorithm.SortUtil; ">cqt>2 A
V\"1wV~E
/** .8:+MW/
* @author treeroot M.S s:ttj
* @since 2006-2-2 svqvG7
* @version 1.0 Vli3>K&
*/ -( (Z@T1k
public class HeapSort implements SortUtil.Sort{ O<>#>[
@"w2R$o
/* (non-Javadoc) v[smQO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VE*j*U j
*/ _!%M%
public void sort(int[] data) { *Er? C;
MaxHeap h=new MaxHeap(); qv$!\T
h.init(data); H}B2A"
for(int i=0;i h.remove(); Jl_~_Z
System.arraycopy(h.queue,1,data,0,data.length); r,Ds[s)B
} v~f'K3fLp
<&6u]uKrW
private static class MaxHeap{ D,E$_0
4QO/ff[ o
void init(int[] data){ $e*B:}x}
this.queue=new int[data.length+1]; l^ Rm0t_
for(int i=0;i queue[++size]=data; JCNk\@0i*
fixUp(size); l1|~
} }I]W'<jY
} /h7.oD8CU
P2t_T'R}
private int size=0; ydB$4ZB3[
)d:K:YXt
private int[] queue; g#|oif9o
5a6VMqQ6
public int get() { @UV{:]f~e
return queue[1]; BKX9SL]
} xG8`'SNY
0U%Xm[:
public void remove() { |/*pT1(&
SortUtil.swap(queue,1,size--); /LF3O~Go
fixDown(1); C 0>=x{,v
} ,z G(u 1
file://fixdown %<AS?Ry
private void fixDown(int k) { W_%W%i|
int j; ^4 8\>-Q\
while ((j = k << 1) <= size) { e"~)Utk
if (j < size %26amp;%26amp; queue[j] j++; gJk[Ja
if (queue[k]>queue[j]) file://不用交换 q1w|'V
break; ,z[(k"
SortUtil.swap(queue,j,k); 3}j1RYtz
k = j; Za0gs @$
} St2Q7K5s{
} VKNp,Lf
private void fixUp(int k) { `R0Y+#$8h
while (k > 1) { vtZ?X';wh
int j = k >> 1; >D~w}z/fk
if (queue[j]>queue[k]) 1AT'S;`
break; pqH4w(;
SortUtil.swap(queue,j,k); FQ!Oxlq,Q
k = j; c|Y!c!9F
} {-h, ZdH^
} fnWsm4
Z\'wm'
} PtqGX=u
8 URj1 W
} :!']p2B
:~D];m
SortUtil： U!0E_J
hbfsHT
package org.rut.util.algorithm; ;_N"Fdl
[;FofuZ
import org.rut.util.algorithm.support.BubbleSort; ?@DNsVwb
import org.rut.util.algorithm.support.HeapSort; nj
import org.rut.util.algorithm.support.ImprovedMergeSort; E(;i>
import org.rut.util.algorithm.support.ImprovedQuickSort; x2m]Us@LIU
import org.rut.util.algorithm.support.InsertSort; LipxAE?O
import org.rut.util.algorithm.support.MergeSort; &[~[~m|
import org.rut.util.algorithm.support.QuickSort; `.8UKSH+
import org.rut.util.algorithm.support.SelectionSort; V^2-_V]8
import org.rut.util.algorithm.support.ShellSort; \K}aQKB/j
8YKQItK
/** o:9$UV[
* @author treeroot B2(,~^39
* @since 2006-2-2 b2s~%}T
* @version 1.0 cix36MR_
*/ f?maa5S
public class SortUtil { ^j=bObaX
public final static int INSERT = 1; ${>DhfF
public final static int BUBBLE = 2; JGgxAd{L
public final static int SELECTION = 3; B9^R8|V
public final static int SHELL = 4; jA<T p}$!
public final static int QUICK = 5; n_9x"m$
public final static int IMPROVED_QUICK = 6; lhxdx
public final static int MERGE = 7; s!de2z
public final static int IMPROVED_MERGE = 8; 8lb-}=
public final static int HEAP = 9; <xqba4O
{ 8p\Y
public static void sort(int[] data) { SK-W%t
sort(data, IMPROVED_QUICK); v)+@XU2wZ
} "Yby
private static String[] name={ !+KhFC&Py
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" eT-9
}; {(Fe7,.S3
t!~S9c
private static Sort[] impl=new Sort[]{ + Kk@Q
new InsertSort(), u|OtKq
new BubbleSort(), :1MMa6
new SelectionSort(), .`J:xL%Z
new ShellSort(), GO~k '
new QuickSort(), gl "_:atW
new ImprovedQuickSort(), " '[hr$h3
new MergeSort(), }dKLMNqPA
new ImprovedMergeSort(), xqv[? ?
new HeapSort() .Q[yD<)Ubs
}; qd8pF!u|#
)5GQJiY
public static String toString(int algorithm){ 1.0J2nZpt
return name[algorithm-1]; {i;6vRr
} 7"K^H]6u30
z6cYC,
public static void sort(int[] data, int algorithm) { mp:m`sh*i
impl[algorithm-1].sort(data); ]nc2/S%
} d1bhJK
w+=Q6]FxJ
public static interface Sort { p:tN642
public void sort(int[] data); km4g}~N</
} 9I kUZW
jCQho-1QN
public static void swap(int[] data, int i, int j) { K(3&27sGN
int temp = data; Y|RdzCM
data = data[j]; |X3">U +-
data[j] = temp; On%,l
} )E-E0Hl>7
} YxyG\J\|,