[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; 6ly`lu9
} R&]#@PW^
int i1=l; *32hIiCm
int i2=mid+1; =/MA`>
for(int cur=l;cur<=r;cur++){ jdAjCy;s!
if(i1==mid+1) BXB ZX@jVk
data[cur]=temp[i2++]; 7Nt6}${=z
else if(i2>r) [e;c)XS[
data[cur]=temp[i1++]; zM2_z
else if(temp[i1] data[cur]=temp[i1++]; Q?]-/v
else E8]kd
data[cur]=temp[i2++]; k?;B1D8-n
} j NkobJ1
} YzVhNJWpw
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} IcP\#zhEv
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改进后的归并排序: 6#(==}Sm+
V(3=j)#
package org.rut.util.algorithm.support; 'CA{>\F$F+
mL]a_S{H
import org.rut.util.algorithm.SortUtil; &Na,D7A:3I
r: M>/Z/
/** 2nkymEPu
* @author treeroot $u P'>
* @since 2006-2-2 85Red~-M
* @version 1.0 ,v$Q:n|
*/ r6gfxW5
public class ImprovedMergeSort implements SortUtil.Sort { &ws^Dm]R
fv/Nf"
private static final int THRESHOLD = 10; qvG@kuz8g5
4Be'w`Q {
/* `R6dnbH
* (non-Javadoc) R]<N";-
* jiqE^j3;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !N'HL-oT
*/ |Q?^Ba
public void sort(int[] data) { XDohfa_
int[] temp=new int[data.length]; }ej>uZVe<
mergeSort(data,temp,0,data.length-1); &hu>yH>j
} ~kFL[Asnaf
!\5w<*p8
private void mergeSort(int[] data, int[] temp, int l, int r) { Wmc@: (n
int i, j, k; #.j}:
int mid = (l + r) / 2; T:I34E[
if (l == r) 7]H<ou
return; cB=ExD.Q
if ((mid - l) >= THRESHOLD) b|oT!s
mergeSort(data, temp, l, mid); _9:r4|S
else ^xm%~
insertSort(data, l, mid - l + 1); G4](!f!Kv
if ((r - mid) > THRESHOLD) K*S3{s%UR
mergeSort(data, temp, mid + 1, r); #g=
else z}w7X6&e
insertSort(data, mid + 1, r - mid); ohna1a^
qsWy <yL+
for (i = l; i <= mid; i++) { 75^AO>gt
temp = data; <NWq03:&
} ZXl_cq2r
for (j = 1; j <= r - mid; j++) { Hg5:>?Lw@
temp[r - j + 1] = data[j + mid]; +h08uo5c
} nM|Cv
int a = temp[l]; d$hBgJe>N
int b = temp[r]; Q|xa:`3?
for (i = l, j = r, k = l; k <= r; k++) { ?kdan
if (a < b) { 5Ky(C6E$s
data[k] = temp[i++]; * o{7 a$V
a = temp; /]oQqZHv
} else { e2^TQv2(=e
data[k] = temp[j--]; %'OY
b = temp[j]; _Wqy,L;J
} ;2P
} Z\3~7Ek2m
} {$g3R@f^~
AVi&cvhs
/** nvQTJ4,,
* @param data h8dFW"cpC
* @param l 8qL.L(=\/
* @param i m~0Kos%^*b
*/ ! k 1 Ge+
private void insertSort(int[] data, int start, int len) { JED\"(d(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); < 1[K1'7h
} Q[{RNab
} 5]xSK'6W
} niqknqW<t
} $*;`$5.x^
"+E\os72|
堆排序： Y>6N2&Q
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package org.rut.util.algorithm.support; ]I_*+^?tI
aW-6$=W
import org.rut.util.algorithm.SortUtil; Wdi`ZE
0SDnMij&bf
/** 5] LfJh+"n
* @author treeroot Al=ByX@
* @since 2006-2-2 ``%yVVg}
* @version 1.0 -9::M}^2
*/ k%BU&%?1
public class HeapSort implements SortUtil.Sort{ .,20_<j%=
#q4uS~
/* (non-Javadoc) ,l Y4WO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xv3pKf-K
*/ TJ1h[
public void sort(int[] data) { Wy%FF\D.Y
MaxHeap h=new MaxHeap(); Z&O6<=bg!
h.init(data); tzthc*-<
for(int i=0;i h.remove(); /3&MUB*z&y
System.arraycopy(h.queue,1,data,0,data.length); 0` .5gxm
} L0oVXmlr
|Ve,Y
private static class MaxHeap{ VD<z]@
C]p@7"l
void init(int[] data){ /'VbV8%
this.queue=new int[data.length+1]; 0(*L)s,5
for(int i=0;i queue[++size]=data; f7y.##WG
fixUp(size); v2_` iwE
} J#t-."f6^
} 6tFi\,)E
UWidT+'Sa
private int size=0; J ZkQ/vp(
LT"H-fTgs
private int[] queue; #*:^\z_Jd
n}I?.r@e
public int get() { q k6
return queue[1]; 8CZ%-}-%$
} k/D{&(F ~
5'c#pm\Q
public void remove() { 4Y$\QZO
SortUtil.swap(queue,1,size--); 5C&*PJ~WA
fixDown(1); 4hODpIF
} SiUu**zC
file://fixdown yOt#6Vw
private void fixDown(int k) { 1[T7;i$
int j; [q_+s
while ((j = k << 1) <= size) { UKQ"sC
if (j < size %26amp;%26amp; queue[j] j++; uZZRFioX|
if (queue[k]>queue[j]) file://不用交换 I}m20|vv
break; xEk8oc
SortUtil.swap(queue,j,k); u>n"FL'e
k = j; bMxK@$G~
} |-G2pu;
} 4eY?#8
private void fixUp(int k) { !nCq8~#
while (k > 1) { xhOoZ-
int j = k >> 1; tM^4K r~o,
if (queue[j]>queue[k]) "L:4 7!8
break; &iVdqr1,
SortUtil.swap(queue,j,k); 2 U]d1
k = j; >W;NMcN~
} a5GLbanF
} # )y/aA
[ r8 ZAS
} U!`iKy-
B+snHabS6
} !TJ,:c]4{!
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SortUtil： 9&5<ZC-D
".tL+A[
package org.rut.util.algorithm; Ff%V1BH[
zD79M
import org.rut.util.algorithm.support.BubbleSort; qS2Nk.e]o
import org.rut.util.algorithm.support.HeapSort; +)iMJ]>
import org.rut.util.algorithm.support.ImprovedMergeSort; eM:J_>7t
import org.rut.util.algorithm.support.ImprovedQuickSort; Iz5NA0[=2
import org.rut.util.algorithm.support.InsertSort; ~e 1l7H;
import org.rut.util.algorithm.support.MergeSort; D**GC
import org.rut.util.algorithm.support.QuickSort; 6eB;
import org.rut.util.algorithm.support.SelectionSort; R2gV(L(!!
import org.rut.util.algorithm.support.ShellSort; ylKK!vRHT
yGf7k>K'
/** 8s@N NjV
* @author treeroot [/UchU]DT
* @since 2006-2-2 wDZ<UP=X
* @version 1.0 a/,>fv9;$
*/ 0(D^NtB7
public class SortUtil { uv27Vos
public final static int INSERT = 1; 1!~cPD'F
public final static int BUBBLE = 2; BzP,Tu{,
public final static int SELECTION = 3; NEIkG>\7q
public final static int SHELL = 4; 9)ALJd,M
public final static int QUICK = 5; >H!Mx_fDL
public final static int IMPROVED_QUICK = 6; }OL"38P
public final static int MERGE = 7; :x)H!z P
public final static int IMPROVED_MERGE = 8; KLg1(W(
public final static int HEAP = 9; /Hyz]46
CwA_jOp
public static void sort(int[] data) { ,erf{"Nh
sort(data, IMPROVED_QUICK); HUi?\4
} (Q^sK\
private static String[] name={ aa`(2%(:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jO-?t9^
}; XH"+oW
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private static Sort[] impl=new Sort[]{ l@4_D;b3o"
new InsertSort(), NQk aW)
new BubbleSort(), mll:rWC)
new SelectionSort(), O?JJE8~']
new ShellSort(), qN)y-N.LI(
new QuickSort(), IOcQI:4.`
new ImprovedQuickSort(), Z<-_Y]4j
new MergeSort(), 3@>F-N
new ImprovedMergeSort(), |h>PUt@LL
new HeapSort() h:YD$XE
}; HTJ2D@h
I,j4 BU4
public static String toString(int algorithm){ Tlsh[@Q
return name[algorithm-1]; /kW Z 8Z
} 9\?OV@
}}AIpYp,P
public static void sort(int[] data, int algorithm) { ,c p2Fac
impl[algorithm-1].sort(data); ~~tTr$
} %ou,|Dww
py*22Ua^
public static interface Sort { Dcl$?
public void sort(int[] data); 6#?T?!vZ
} SS=<\q#MS
>cu%Cs=m
public static void swap(int[] data, int i, int j) { KP&+fDa
int temp = data; ;c(a)_1
data = data[j]; |*&l?S
data[j] = temp; 9y7N}T6
} t]yxLl\
} OXEk{#Uf[3