[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; HZm i?
} X2`>@GR/>
int i1=l; g@2.A;N0
int i2=mid+1; 2tv40(M:<
for(int cur=l;cur<=r;cur++){ `#f=&S?k
if(i1==mid+1) [1*/lt|+p
data[cur]=temp[i2++]; -1:Z^&e/
else if(i2>r) mQs$7t[>t
data[cur]=temp[i1++]; [z~Nw#
else if(temp[i1] data[cur]=temp[i1++]; K[[k,W]qb
else OeYLL4H
data[cur]=temp[i2++]; @NIypi$T
} T]W -g
} uI2'jEjO
f*],j
} (HI%C@e9
gp HwiFc
改进后的归并排序: 9qDGxW '1
Dkb&/k:)
package org.rut.util.algorithm.support; 2FzS_\":I
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import org.rut.util.algorithm.SortUtil; zl\#n:|
d]3sC
/** H1nQ.P]_
* @author treeroot 0vp I#q
* @since 2006-2-2 &w0=/G/T=~
* @version 1.0 ak>NKK8P
*/ kKM%
public class ImprovedMergeSort implements SortUtil.Sort { b..$5
Z-|C{1}A
private static final int THRESHOLD = 10; pG @iR*?
qfu2}qUX~%
/* 6W=:`14
* (non-Javadoc) "^z=r]<5
* A232"p_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E5 oD|'=WA
*/ Y2-bU 7mo
public void sort(int[] data) { >n~p1:$
int[] temp=new int[data.length]; HIm, "iYk
mergeSort(data,temp,0,data.length-1); S=p u
} 7Ca\ (82
rbPs~C-[
private void mergeSort(int[] data, int[] temp, int l, int r) { H4NEB1TO>
int i, j, k; }yw;L(3
int mid = (l + r) / 2; 9/Dt:R3QU
if (l == r) #&83;uys
return; .,Qnn}:l
if ((mid - l) >= THRESHOLD) F5+_p@!i
mergeSort(data, temp, l, mid); gi'agB^
else A#S:_d
insertSort(data, l, mid - l + 1); <UJJ],)^1A
if ((r - mid) > THRESHOLD) 7[BL 1HI*
mergeSort(data, temp, mid + 1, r); |nN/x<v
else io7U[#
insertSort(data, mid + 1, r - mid); C-u/{CP
kA!(}wRL
for (i = l; i <= mid; i++) { K<6x4ha
temp = data; ':D&c
} 1:zu$|%7
for (j = 1; j <= r - mid; j++) { g@i>R>
temp[r - j + 1] = data[j + mid]; 4D$sFR|?t
} Pki4wDCTW
int a = temp[l]; "GI&S%F
int b = temp[r]; Ok~{@\
for (i = l, j = r, k = l; k <= r; k++) { `?^w
if (a < b) { &hN&nH"PC
data[k] = temp[i++]; Tki/d\!+
a = temp; ~88 Tz+
} else { %8CT -mQ
data[k] = temp[j--]; ,'CWt]OS'
b = temp[j]; 7&V^BW
} h#>L:Wf5E
} VhFRh,J(T
} =veOVv[Q&/
N5s|a5
/** /Jf`x>eiH
* @param data i `QK'=h[
* @param l C2rj]t
* @param i /lB0>Us
*/ F[D0x26^
private void insertSort(int[] data, int start, int len) { XYHCggy
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); M |?p3%
} ?w37vsN
} V/}>>4
} qzt2j\v
} I"32[?0 (;
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堆排序： nP\V1pgA
DJYXC,r
package org.rut.util.algorithm.support; !Vr45l
=j+oKGkoCa
import org.rut.util.algorithm.SortUtil; Ge:-|*F
6~h1iY_~
/** M1]6lg[si
* @author treeroot YD46Z~$
* @since 2006-2-2 "Dl9<EZ
* @version 1.0 ?ey&Un"
*/ MAe<.DHY
public class HeapSort implements SortUtil.Sort{ `x$}~rP&)!
'CX.qxF1;p
/* (non-Javadoc) n22hVw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +yb$[E*
*/ f'6qJk%J
public void sort(int[] data) { Uk*;C
MaxHeap h=new MaxHeap(); iCnUnR{
h.init(data); TdP{{&'9
for(int i=0;i h.remove(); 3H'nRK},
System.arraycopy(h.queue,1,data,0,data.length); FK@ f'
} AIl$qPKj&
pO/SV6N
private static class MaxHeap{ vbA7I<;
A2|o=mOH
void init(int[] data){ ))IgB).3M
this.queue=new int[data.length+1]; 7t-*L}~WA
for(int i=0;i queue[++size]=data; `@$"L/AJ
fixUp(size); B}q
} X}j'L&{F@
} AZy~Q9Kc
-':"6\W
private int size=0; noaN@K[GO
Xh0wWU*
private int[] queue; c[h'`KXJf-
g/l0}%
public int get() { &=z1$ih>2\
return queue[1]; o7Cnyy#:
} lv00sa2z
F8S~wW=\w
public void remove() { ,dZ#,<
SortUtil.swap(queue,1,size--); fmnRUN=
fixDown(1); ,"N3k(g
} W"-EC`nP
file://fixdown (I7&8$Zl
private void fixDown(int k) { DO1 JPeIi
int j; xMSNrOc
while ((j = k << 1) <= size) { yL;o{ G
if (j < size %26amp;%26amp; queue[j] j++; V5yxQb
if (queue[k]>queue[j]) file://不用交换 7~kpRa@\P
break; xxLgC;>[
SortUtil.swap(queue,j,k); h/1nm U]
k = j; v?YdLR
} hi {2h04
} kMl@v`
private void fixUp(int k) { 'YZI>V*
while (k > 1) { lPRdwg-
int j = k >> 1; ^_*jp[!`b$
if (queue[j]>queue[k]) FVsu8z u
break; 5W[3_P+
SortUtil.swap(queue,j,k); ?AV&@EX2C
k = j; hl6,#2$
} z-KrQx2
} ^MW\t4pZ
9UeVvH
} "pSH!0Ap\
HA^jk%53
} U^M@um M
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SortUtil： !j!Z%]7
e9~cBG|
package org.rut.util.algorithm; ~K5Cr
r{K\(UT]!
import org.rut.util.algorithm.support.BubbleSort; Bs+c2R
import org.rut.util.algorithm.support.HeapSort; v>#Cg\
import org.rut.util.algorithm.support.ImprovedMergeSort; n!0${QVnS
import org.rut.util.algorithm.support.ImprovedQuickSort; 2Vz'n@g=
import org.rut.util.algorithm.support.InsertSort; Sni&?tcY
import org.rut.util.algorithm.support.MergeSort; :DZLjC
import org.rut.util.algorithm.support.QuickSort; ,}9f(`
import org.rut.util.algorithm.support.SelectionSort; js:C mnI
import org.rut.util.algorithm.support.ShellSort; do:QH.q8)
CS~=Z>6EjA
/** *.kj]BoO
* @author treeroot >DDQ'W!
* @since 2006-2-2 !lR0w|
* @version 1.0 E$]a?uA:
*/ m>]>$=%
public class SortUtil { eaV3)uP
public final static int INSERT = 1; cT/3yf
public final static int BUBBLE = 2; `fQM
public final static int SELECTION = 3; `t{D7I7
public final static int SHELL = 4; {E!$ xY8
public final static int QUICK = 5; _:wZmZU}
public final static int IMPROVED_QUICK = 6; p>k]C:h
public final static int MERGE = 7; zc6Ho
public final static int IMPROVED_MERGE = 8; !"g=&Uy&
public final static int HEAP = 9; VDB$"T9#
a`7%A H)
public static void sort(int[] data) { OOCQsoN
sort(data, IMPROVED_QUICK); E^b pckP
} {iA^rv|
private static String[] name={ q<-%L1kc1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" d32@M~vD
}; >$2E1HW.
|'ZN!2u
private static Sort[] impl=new Sort[]{ X3P&"}a
new InsertSort(), IYuyj(/!
new BubbleSort(), &g*klt'B
new SelectionSort(), j.k@6[R>?
new ShellSort(), jmkRP"ZnA
new QuickSort(), 0(wf{5
new ImprovedQuickSort(), uVN.=
new MergeSort(), >HE,'
new ImprovedMergeSort(), 4Z*|Dsw
new HeapSort() riID,aut
}; hZ!oRWIU%G
e&d3SQ%
public static String toString(int algorithm){ y&7YJx
return name[algorithm-1]; .j:i&j(
} joe9.{
2*+3RrJ
public static void sort(int[] data, int algorithm) { JYPxd~T/-
impl[algorithm-1].sort(data); 2bWUa~%B
} -r!42`S
7nm}fT z7
public static interface Sort { &kb\,mQ
public void sort(int[] data); Q`N18I3
} v#zPH5xo
d{W}p~UbH
public static void swap(int[] data, int i, int j) { TW>?h=.z
int temp = data; .\$Wy$ d
data = data[j]; d&hD[v
data[j] = temp; L*P_vCC
} [d}qG#N
} ,aI,2U91