[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; uO1^nK
} </R@)_'
int i1=l; *:`fgaIDa
int i2=mid+1; Nnoj6+b
for(int cur=l;cur<=r;cur++){ Dw y|mxlFn
if(i1==mid+1) E )2/Vn2
data[cur]=temp[i2++]; '{cFr
else if(i2>r) 6rO^ p
data[cur]=temp[i1++]; u`Kc\BSn
else if(temp[i1] data[cur]=temp[i1++]; ft0tRv(s:
else 12Fnv/[n'K
data[cur]=temp[i2++]; 5r dt
} I*/:rb
} 1[-`*Ph
@g*[}`8]y
} q;_?e_
++ObsWZ
改进后的归并排序: @X=sfygk
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package org.rut.util.algorithm.support; Ak$9\Sl
/UaQ2h\
import org.rut.util.algorithm.SortUtil; 3K/]{ dkD
vG=Pi'4XXo
/** gADqIPu]
* @author treeroot fgHsg@33N
* @since 2006-2-2 Cv p#=x0
* @version 1.0 =FdFLrx~l
*/ 17w{hK4o8O
public class ImprovedMergeSort implements SortUtil.Sort { /nEK|.j
UWdqcOr
private static final int THRESHOLD = 10; UF@.
jaMpi^C
/* m~&>+q ^7
* (non-Javadoc) $#wi2Ve=6b
* O"_QDl<ya
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |:u5R%
*/ G=C2l# Ae!
public void sort(int[] data) { R@`xS<`L/
int[] temp=new int[data.length]; % 3fpIzm
mergeSort(data,temp,0,data.length-1); c;=St1eoz
} 0 t/mLw&
@Y+kg
private void mergeSort(int[] data, int[] temp, int l, int r) { K)h<#F
int i, j, k; #W8c)gkG9
int mid = (l + r) / 2; YF%]%^n
if (l == r) f/Z-dM\e
return; vq@"y%C4
if ((mid - l) >= THRESHOLD) "u{ymJ]t
mergeSort(data, temp, l, mid); E;"VI2F
else Oo ^AE
insertSort(data, l, mid - l + 1); !A14\
if ((r - mid) > THRESHOLD) - 8jlh
mergeSort(data, temp, mid + 1, r); VRHS 4
else B =DV!oUg
insertSort(data, mid + 1, r - mid); .dvs&+I
R/6 v#9m7
for (i = l; i <= mid; i++) { A}3E)Qo=G
temp = data; r\y\]AmF
} ZY;g)`E1
for (j = 1; j <= r - mid; j++) { y;O 6q206
temp[r - j + 1] = data[j + mid]; KCqz]
} 'uwq^b_
int a = temp[l]; Oe^9pH,1t
int b = temp[r]; -vt6n1A&b
for (i = l, j = r, k = l; k <= r; k++) { '|M} 3sL
if (a < b) { :73T9/
data[k] = temp[i++]; R80|q#h,]
a = temp; QqXaXx;
} else { PC%_^BDW
data[k] = temp[j--]; B E#pHg
b = temp[j]; "#{b)!EH
} 3;!a'[W&p
} /N@NT/.M<
} mmMiA@0
=sS=
/** MJKPpQ(,
* @param data .&K?@T4l
* @param l XD[9wd5w8
* @param i 37V$Qb_
*/ c3\p@}
private void insertSort(int[] data, int start, int len) { $A(3-n5=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &((04<@e
} +^$;oG
} HS1{4/
} Q"qJ0f)
} jank<Q&w
j\.e6&5%SS
堆排序： ^Je*k)COn
:rvBx"
package org.rut.util.algorithm.support; -{yG+1
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import org.rut.util.algorithm.SortUtil; 0+A#k7c6p
ZV07;`I
/** za8+=?
* @author treeroot S:c lyx
* @since 2006-2-2 vTp,j-^
* @version 1.0 q"LT8nD\
*/ 6-nf+!#G
public class HeapSort implements SortUtil.Sort{ uYd_5 nw
g~OG~g@
/* (non-Javadoc) uLN.b339
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4XeO^#
*/ 4U[X-AIY&
public void sort(int[] data) { nH[>Sff$
MaxHeap h=new MaxHeap(); %<h2^H\O
h.init(data); WkoYkkuzj
for(int i=0;i h.remove(); J!'IkC$>
System.arraycopy(h.queue,1,data,0,data.length); >Q)S-4iR
} g G|4+' t
4&~*;an7
private static class MaxHeap{ I*(7(>zgyv
>EgMtZ88.<
void init(int[] data){ W7IAW7w8U
this.queue=new int[data.length+1]; rE\&FVx
for(int i=0;i queue[++size]=data; *`tQX$F
fixUp(size); U.|0y=
} t9_&n.z
} CY)[{r
EhN@;D+
private int size=0; L_IvR 4:j~
>lugHF$G
private int[] queue; 3LVL5y7|
&2W`dEv]?
public int get() { }BCxAwD4
return queue[1]; n$"BF\eM
} !,*Uvs@b
_Aw-{HE'
public void remove() { j9=)^?
SortUtil.swap(queue,1,size--); v)'Uoe"R%
fixDown(1); ay28%[Q b4
} y$L&N0z
file://fixdown jgw+c3^R_
private void fixDown(int k) { QO|jdlg
int j; ^ =H 10A
while ((j = k << 1) <= size) { C7Hgzc|U
if (j < size %26amp;%26amp; queue[j] j++; "l6Ob
if (queue[k]>queue[j]) file://不用交换 COSQ
break; Z0Qh7xWve
SortUtil.swap(queue,j,k); q4u-mM7#7
k = j; c*)PS`]t
} &Fch{%S>
} =Flr05}m
private void fixUp(int k) { m=]}Tn
while (k > 1) { ]T>YYz
int j = k >> 1; .O9Pn,:
if (queue[j]>queue[k]) JWQ.Efe
break; A2B]E,JMp
SortUtil.swap(queue,j,k); +#g4Crb
k = j; PMiG:bM
} sAPYQ
} Ak2Vf0Eb
?&.Eg^a"
} "o<&3c4
&s&Ha{(!w
} SS-7y:6y>
iP?=5j=4
SortUtil： 1ka58_^
et6@);F
package org.rut.util.algorithm; it=ir9
/6p7k
import org.rut.util.algorithm.support.BubbleSort; )"^ )Nk
import org.rut.util.algorithm.support.HeapSort; Y-*]6:{E
import org.rut.util.algorithm.support.ImprovedMergeSort; ;3sJ7%`v
import org.rut.util.algorithm.support.ImprovedQuickSort; BctU`.
import org.rut.util.algorithm.support.InsertSort; zMAlZ[DN
import org.rut.util.algorithm.support.MergeSort; |JCn=v@
import org.rut.util.algorithm.support.QuickSort; U6_GEBz~y
import org.rut.util.algorithm.support.SelectionSort; kn6X I*
import org.rut.util.algorithm.support.ShellSort; <t. w(?
RSf*[2
/** l' a<k"
* @author treeroot n UD;y}}n
* @since 2006-2-2 w;T?m,"
* @version 1.0 ~ponYc.Y
*/ .BZ3>]F3<
public class SortUtil { Uj~ :|?Wz
public final static int INSERT = 1; 1?T^jcny:M
public final static int BUBBLE = 2; 6XGqZ!2
public final static int SELECTION = 3; h)yAge
public final static int SHELL = 4; j}$Q`7-wB1
public final static int QUICK = 5; &0euNHH;sL
public final static int IMPROVED_QUICK = 6; i>@"&
public final static int MERGE = 7; @!Q\| <
public final static int IMPROVED_MERGE = 8; ZN(@M@}
public final static int HEAP = 9; I~7eu&QZ
B_|jDH#RyJ
public static void sort(int[] data) { x^6sjfAW
sort(data, IMPROVED_QUICK); \jByJCN
} dn=g!=
private static String[] name={ QgW4jIbx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" iYzm<3n?
}; ^2!l/(?
l":Z. J
private static Sort[] impl=new Sort[]{ ;S^7Q5-
new InsertSort(), pkEqd"G
new BubbleSort(), OYNPZRu
new SelectionSort(), 0p ZX_L'
new ShellSort(), o2NU~Ub
new QuickSort(), E3o J;E
new ImprovedQuickSort(), /'>#1J|TlK
new MergeSort(), rfc;
new ImprovedMergeSort(), KN zm)O
new HeapSort() iY4FOt7\
}; NxQ+z^o\
pL)o@-k#%
public static String toString(int algorithm){ qi-!iT(fe
return name[algorithm-1]; h8tKYm
} C<\O;-nHH
9WsGoZPn
public static void sort(int[] data, int algorithm) { %$I@7Es>
impl[algorithm-1].sort(data); {afR?3GK
} Qxh 1I?h
=lqGt.x
public static interface Sort { bZ*J]1y(.
public void sort(int[] data); L;k9}HWpP
} 06S-3bis
N6_<[`
public static void swap(int[] data, int i, int j) { A!j6JY.w
int temp = data; *%xmCPJ
data = data[j]; X3;|h93.a
data[j] = temp; gsp|?)]x
} )mMHwLDwH
} Upkw.`D`