[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; q bZ,K@0
} ?(/j<,m^
int i1=l; mDF"&.(j
int i2=mid+1; mk%"G=w
for(int cur=l;cur<=r;cur++){ r3H}*Wpf
if(i1==mid+1) *M&VqG4P9w
data[cur]=temp[i2++]; 3_\{[_W
else if(i2>r) 2@3.xG
data[cur]=temp[i1++]; }x?H ~QQT
else if(temp[i1] data[cur]=temp[i1++]; 1KYbL8c
else 8S1P&+iKs
data[cur]=temp[i2++]; RHx+HBZ
} )0U3w#,JQ
} !<=%;+
RJRq` T|m
} ?#*
v=*Bb3dt
改进后的归并排序: /}nrF4S
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package org.rut.util.algorithm.support; 88#qu.
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import org.rut.util.algorithm.SortUtil; ?H[5O+P[
8{G?92 {rN
/** Q\27\2
* @author treeroot C^/ -lc
* @since 2006-2-2 X$-boe?
* @version 1.0 %]chL.s
*/ 2fzKdkJhe
public class ImprovedMergeSort implements SortUtil.Sort { %R5Com
," C[Qg(
private static final int THRESHOLD = 10; y^X\^Kq
XJmFJafQD
/* lHcZi
* (non-Javadoc) WXLe,7y
* {}g %"mi#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z(Eke
*/ \7,MZt
public void sort(int[] data) { $AA~]'O>6:
int[] temp=new int[data.length]; my\o P(e\
mergeSort(data,temp,0,data.length-1); `y^zM/Ib
} _oJ2]f6KX
a IpPL8a
private void mergeSort(int[] data, int[] temp, int l, int r) { KbwTj*k[
int i, j, k; kUn2RZ6$#
int mid = (l + r) / 2; 2#AeN6\@
if (l == r) 7`blGzP_
return; }iua] 4|
if ((mid - l) >= THRESHOLD) :F7k{~
mergeSort(data, temp, l, mid); NV}RRs
else =de<WoKnu2
insertSort(data, l, mid - l + 1); +z:CZ(fb
if ((r - mid) > THRESHOLD) b|sc'eP#?
mergeSort(data, temp, mid + 1, r); O->_/_
else (ve+,H6w\
insertSort(data, mid + 1, r - mid); ]~ !XiCqu
*?_qE
for (i = l; i <= mid; i++) { `E} p77
temp = data; <$jKy3@
} r"{Is?yKe
for (j = 1; j <= r - mid; j++) { 6kt]`H`cfJ
temp[r - j + 1] = data[j + mid]; \}$*}gW[}
} RDs,sj/Y9?
int a = temp[l]; Jo{zy
int b = temp[r]; mb0n}I_AC
for (i = l, j = r, k = l; k <= r; k++) { Ky[bX
if (a < b) { kqVg2#<@M
data[k] = temp[i++]; 8^/+wa+G
a = temp; [8F \;
} else { LkJ$aW/
data[k] = temp[j--]; T&1-eq>l
b = temp[j]; {q&@nm40
} 2#z=zd
} Qm.z@DwFM{
} AH&9Nye8
>j50 ;</
/** ==]Z \jk
* @param data wVgi+P
* @param l ?. zu2
* @param i bK3B3r#$
*/ { EA2
private void insertSort(int[] data, int start, int len) { Y 3o^Euou
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +w "XNl
} =m`l%V[
} EfKM*;A
} [O=W>l
} "A%MVym."
;"1/#CY773
堆排序： &&X$d!V
bt;lq!g
package org.rut.util.algorithm.support; EVR! @6@
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import org.rut.util.algorithm.SortUtil; /^w"' '
Ns'FH(:
/** VR"u*
* @author treeroot hIR@^\?
* @since 2006-2-2 qh%i5Mu
* @version 1.0 oG!6}5
*/ "?$L'!bM@
public class HeapSort implements SortUtil.Sort{ !q!"UMiG
,# ]+HS^B
/* (non-Javadoc) $zdd=.!KiK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mv{<'
*/ $h,d? .u6w
public void sort(int[] data) { iwUv`>l&
MaxHeap h=new MaxHeap(); PmHd9^C
h.init(data); ]de\i=?|
for(int i=0;i h.remove(); Ujf,6=M
System.arraycopy(h.queue,1,data,0,data.length); W:WQaF`2x
} cI5N"U@yN
T-^0:@5o9
private static class MaxHeap{ sr\cVv")
UanEzx%
void init(int[] data){ W/sY#"
this.queue=new int[data.length+1]; RF:04d
for(int i=0;i queue[++size]=data; @9aGz6k+
fixUp(size); h{I`7X
} gt'*B5F(
} a_Jb>}
nh<Z1tMU
private int size=0; GSP?X$E
YNI;h%w
private int[] queue; SgiDh dE
C#0brCQq3
public int get() { sa G8g
return queue[1]; }"hW b(
} ] @ufV
> V8sm/M
public void remove() { M;qBDT~)
SortUtil.swap(queue,1,size--); wZQ)jo7*g
fixDown(1); WVOoHH
} P7Xg{L&@.
file://fixdown sdrWOq
private void fixDown(int k) { rS4%$p"
int j; (Ux[[
while ((j = k << 1) <= size) { [,rn3CA
if (j < size %26amp;%26amp; queue[j] j++; (Izf L1
if (queue[k]>queue[j]) file://不用交换 %yfE7UPS]
break; iUTU*El>
SortUtil.swap(queue,j,k); Hte[TRbM
k = j; Bhe{L?}0
} fH[Wkif
} )9B:Y;>)
private void fixUp(int k) { FNC[59
while (k > 1) { 1eHe~p ,
int j = k >> 1; i3P9sdTD
if (queue[j]>queue[k]) Hs$'0:
break; ~q 7;8<U
SortUtil.swap(queue,j,k); H'Nq#K
k = j; -G-3q6A
} tF^g<)S;t
} ->h5T%sn
\%TyrY+`K
} ya.n'X14
xz8G}Ku
} FIS "Z(
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SortUtil： Lc|{aN
P6.!3%y
package org.rut.util.algorithm; TcJ$[
tb,9a!?
import org.rut.util.algorithm.support.BubbleSort; P\AqpQv
import org.rut.util.algorithm.support.HeapSort; t+O e)Ns
import org.rut.util.algorithm.support.ImprovedMergeSort; ,:UX<6l R
import org.rut.util.algorithm.support.ImprovedQuickSort; q_sEw~~@!
import org.rut.util.algorithm.support.InsertSort; i$C-)d]
import org.rut.util.algorithm.support.MergeSort; lI6W$V\,
import org.rut.util.algorithm.support.QuickSort; &n>7Ir
import org.rut.util.algorithm.support.SelectionSort; L=]p_2+
import org.rut.util.algorithm.support.ShellSort; xzr<k Sp
[pL*@9Sa&
/** t"|DWC*
* @author treeroot -uj3'g(;w
* @since 2006-2-2 oQ\&}@(V
* @version 1.0 G>K@AW#
*/ RYy,wVh}
public class SortUtil { bq NP#C
public final static int INSERT = 1; ,EI:gLH
public final static int BUBBLE = 2; #K4*6LI
public final static int SELECTION = 3; [Gtb+'8
public final static int SHELL = 4; O,'#C\
public final static int QUICK = 5; E7`qmn
public final static int IMPROVED_QUICK = 6; 64umul
public final static int MERGE = 7; +rc SL8C
public final static int IMPROVED_MERGE = 8; C6]OAUXy:F
public final static int HEAP = 9; $gvr -~
?:uNN
public static void sort(int[] data) { VD[pZ2;4
sort(data, IMPROVED_QUICK); "VTF}#Uo
} z)w-N
private static String[] name={ :G=FiC
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t7*#[x)a
}; ^~1<f1(
wd+K`I/v7h
private static Sort[] impl=new Sort[]{ Ryv_1gR!
new InsertSort(), 0` 5e
new BubbleSort(), I2[]A,f,
new SelectionSort(), '3Q3lM'lh
new ShellSort(), R\O.e
new QuickSort(), snC/H G7
new ImprovedQuickSort(), prrT:Y
new MergeSort(), nB] Ia?
new ImprovedMergeSort(), wxdyF&U n
new HeapSort() :kG)sw7
}; x-;`-Uo%
t)a;/scT
public static String toString(int algorithm){ HdNnUDb$B
return name[algorithm-1]; !0"nx{7.
} N'?u1P4G
bK*~ol
public static void sort(int[] data, int algorithm) { H M:r0_
impl[algorithm-1].sort(data); T1bd:mC}n
} kO_5|6
Ll}yJ#3,
public static interface Sort { K 1W].(-@4
public void sort(int[] data); !20XsO
} 76@qHTh}
H=~9CJ+tc
public static void swap(int[] data, int i, int j) { (MLhaux-
int temp = data; +@:L|uFU
data = data[j]; OfZN|S+~W
data[j] = temp; -6C +LbV
} *9D!A
} N`$!p9r