[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; R}Z2rbt
} cXG$zwS\
int i1=l; Q[.HoqWK
int i2=mid+1; ?cD2EX%(
for(int cur=l;cur<=r;cur++){ >p@v'h/Cr
if(i1==mid+1) \}+b_J6-
data[cur]=temp[i2++]; zkmfu~_)
else if(i2>r) I 7s}{pG
data[cur]=temp[i1++]; t{Xf3.
else if(temp[i1] data[cur]=temp[i1++]; g~Agy
else ,)7y?*D}
data[cur]=temp[i2++]; a) 5;Od
} P`!31P#]L
} kC4}@{4i
m #}%l3$
} (SGU]@)g
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改进后的归并排序: 6F4OISy%3
VLs%;|`5D
package org.rut.util.algorithm.support; ;$$.L bb8
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import org.rut.util.algorithm.SortUtil; xRPUGGv
]J>{ZL
/** KJ;NcUq
* @author treeroot !Au9C
* @since 2006-2-2 \rY<DxtOq
* @version 1.0 K"U[OZC`
*/ @Zov&01
public class ImprovedMergeSort implements SortUtil.Sort { -iJ @K
,CA3Q.y>|
private static final int THRESHOLD = 10; ]\Q9j7}37+
<\C/;
/* }qn@8}
* (non-Javadoc) i*-L_!cc:
* H_<hZUB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >lIQM3
*/ /$,~|X;&
public void sort(int[] data) { EoD[,:*
int[] temp=new int[data.length]; >,s.!vpK
mergeSort(data,temp,0,data.length-1); ;^Hg\a
} &$+nuUA
`' "125T
private void mergeSort(int[] data, int[] temp, int l, int r) { l&LrcM
int i, j, k; UpIt"+d2&
int mid = (l + r) / 2; yCLDJ%8
if (l == r) |#_`aT"
return; Eggdj+
if ((mid - l) >= THRESHOLD) l!^+Xeg~
mergeSort(data, temp, l, mid); /!L#cUog
else v<c@bDZ>
insertSort(data, l, mid - l + 1); d0MF\yxh
if ((r - mid) > THRESHOLD) kz+OUA@~
mergeSort(data, temp, mid + 1, r); ;&v~tD7
else ri?>@i-9=
insertSort(data, mid + 1, r - mid); uy^vQ/
"ZU CYYre
for (i = l; i <= mid; i++) { p{BBqKv
temp = data; FqT2+VO~
} 2N$yn
for (j = 1; j <= r - mid; j++) { Zn]njf1x
temp[r - j + 1] = data[j + mid]; fF*{\
} 6I`Lszs
int a = temp[l]; EA+}Rf6}
int b = temp[r]; slWO\AYiO
for (i = l, j = r, k = l; k <= r; k++) { rfVHPMD0
if (a < b) { P&0o~@`cL
data[k] = temp[i++]; I"1H]@"=
a = temp; mcB8xE
} else { /9..hEq^
data[k] = temp[j--]; NiCB.a
b = temp[j]; !?u{2D
} ~gAp`Q
} ;mw$(ZKa#
} _K5R?"H0
C+=8?u<
/** S"wn0B$"
* @param data .3JLa8y
* @param l t'pY~a9F
* @param i ]&mN~$+C
*/ uO,9h0y0W
private void insertSort(int[] data, int start, int len) { E,nxv+AQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 50l!f7
} ,-GkP>8f(
} Ja@zeD)f"
} wQV[ZfU^h
} eumpNF%$
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堆排序： 1ae,s{|
&+v!mw>
package org.rut.util.algorithm.support; $V0G[!4
Bl"BmUn
import org.rut.util.algorithm.SortUtil; =KctAR;
5RysN=czA
/** <@puWm[p
* @author treeroot )* \N[zm
* @since 2006-2-2 v.Y?<=E+<d
* @version 1.0 6|-V{
*/ L~PBD?l
public class HeapSort implements SortUtil.Sort{ j~Cch%%G
<HC5YA)4
/* (non-Javadoc) >ARZ=x[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yD-L:)@"
*/ C=&rPUX{
public void sort(int[] data) { UHh7x%$n
MaxHeap h=new MaxHeap(); ipThwp9
h.init(data); ,sqxxq
for(int i=0;i h.remove(); +nj 2
System.arraycopy(h.queue,1,data,0,data.length); ]?#E5(V@x
} &Oih#I
g]V_)}
private static class MaxHeap{ >Yf)]e-
}CCTz0[D"
void init(int[] data){ 2`?58&
this.queue=new int[data.length+1]; = @EN]u
for(int i=0;i queue[++size]=data; J:!m49fF
fixUp(size); .a0]1IkatV
} ,L.*95,
} ~g|Z6-?4Jj
Pd"=&Az|
private int size=0; z3bRV{{YqN
nN]GO}
private int[] queue; 1j!LK-
w I7iE4\vz
public int get() { fy6<KEea
return queue[1]; NZTG)<
} T|%pvTIe
5(+PIKCjC
public void remove() { <U]!1
SortUtil.swap(queue,1,size--); qq,#bRe
fixDown(1); 5!b+^UR;z
} $Sx(vq6(
file://fixdown /~O>He
private void fixDown(int k) { j^Vr!y
int j; @X?7a]+;8
while ((j = k << 1) <= size) { ye-EJDZN
if (j < size %26amp;%26amp; queue[j] j++; U $2"ZyFii
if (queue[k]>queue[j]) file://不用交换 g"dq;H
break; XB.xIApmy
SortUtil.swap(queue,j,k); $\w<.)"#
k = j; <Pm!#)-g9
} b:M1P&R
} nhu;e}[>
private void fixUp(int k) { )9]DJ!]&Q"
while (k > 1) { +&*D7A>~p
int j = k >> 1; aWCZ1F
if (queue[j]>queue[k]) 2YbI."ob
break; nc2=S^Fqu
SortUtil.swap(queue,j,k); [B,w\PLub
k = j; ]VkM)< +
} 7'~Oai~r
} T)Zef
)/y7Fh
} X7g@.Oy`
IrMUw$
} AbExJ~JV\g
#hZ`r5GvTj
SortUtil： p=jpk@RX
vmj'X>Q
package org.rut.util.algorithm; li37*
[pRRBMho
import org.rut.util.algorithm.support.BubbleSort; 1`Ig A0V`"
import org.rut.util.algorithm.support.HeapSort; Ct<]('Hm(
import org.rut.util.algorithm.support.ImprovedMergeSort; 0R-J \
import org.rut.util.algorithm.support.ImprovedQuickSort; Ym8 V)
import org.rut.util.algorithm.support.InsertSort; D^Gs_z$['
import org.rut.util.algorithm.support.MergeSort; F%tV^$%
import org.rut.util.algorithm.support.QuickSort; )yt_i'D}
import org.rut.util.algorithm.support.SelectionSort; (Qcd !!
import org.rut.util.algorithm.support.ShellSort; # E{2 !Z
LsI8T uv
/** zCe[+F
* @author treeroot k6$Ft.0d1Z
* @since 2006-2-2 RD|DHio%
* @version 1.0 {44#<A<
*/ `9* |Y8:
public class SortUtil { gWu<5Y=C
public final static int INSERT = 1; DP8%/CV!*
public final static int BUBBLE = 2; lS96Z3k"SB
public final static int SELECTION = 3; Due@'
public final static int SHELL = 4; }1#prQ0F
public final static int QUICK = 5; YZk.{#^c
public final static int IMPROVED_QUICK = 6; I !J'
public final static int MERGE = 7; jf^BEz5
public final static int IMPROVED_MERGE = 8; EvKzpxCh
public final static int HEAP = 9; X=KC+1e
&~aS24c
public static void sort(int[] data) { 7C9_;81_Dt
sort(data, IMPROVED_QUICK); jcbq#
} ,(A $WT@e
private static String[] name={ ZYS]Et[Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^)UX#D3b
}; [Qqomm.[\w
AGGT] 58|
private static Sort[] impl=new Sort[]{ CUN1.i<pk8
new InsertSort(), `k6ZAOQtX
new BubbleSort(), v{X<6^g
new SelectionSort(), mIZ6[ ?
new ShellSort(), x']Fe7nv
new QuickSort(), Gsu?m
new ImprovedQuickSort(), #\8"d
new MergeSort(), Am!OLGG4
new ImprovedMergeSort(), U38~m}c
new HeapSort() :Y Ki
}; +# 3e<+!F
'.wb= C
public static String toString(int algorithm){ !(HPx@_
return name[algorithm-1]; bE;c&g
} )|=4H>?%
ek"Uq RY
public static void sort(int[] data, int algorithm) { zP&D
impl[algorithm-1].sort(data); tv_&PIu]L
} mxE<
cgi:"y F
public static interface Sort { b_X&>^4Dkl
public void sort(int[] data); ,M9e *
} bq2f?uD-}
FeZ*c~q
public static void swap(int[] data, int i, int j) { Za,myuI+
int temp = data; \ZA@r|=$
data = data[j]; \10KIAQ
data[j] = temp; .JOZ2QWm<
} 2?{'(iay
} 6>]w1 H