[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; &T~X`{V]`
} @OkoT:
int i1=l; EK Vcz'w
int i2=mid+1; 0%dOi ko
for(int cur=l;cur<=r;cur++){ Kk6=61}A
if(i1==mid+1) bd~m'cob>
data[cur]=temp[i2++]; kS8?N`2}LV
else if(i2>r) b^Re947{g
data[cur]=temp[i1++]; gXJBb+P
else if(temp[i1] data[cur]=temp[i1++]; QA*<$v
else [ 'lu;1-,
data[cur]=temp[i2++]; vg1JN"S[
} hlB\Xt
} (+[%^96
WFh.oe8
} (D) KU9B>
$`55 E(
改进后的归并排序: _p*8ke
6{Q-]LOc[.
package org.rut.util.algorithm.support; G(TFv\`vH
b&mA1w[W]
import org.rut.util.algorithm.SortUtil; #Pp:H/b
3ie k>'T
/** RYjK4xT?Y/
* @author treeroot h]s~w
* @since 2006-2-2 eNK[P=-
* @version 1.0 OtmDZ.t;`
*/ M{{kO@P"9
public class ImprovedMergeSort implements SortUtil.Sort { Z)M "`2Ur
_eOC,J<-~
private static final int THRESHOLD = 10; ,1#? 0q
LwK]fFtu
/* o_BTo5]
* (non-Javadoc) jD6HCIjd'
* ]i$y;]f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :sJ7Wok6~
*/ C| ~A]wc=
public void sort(int[] data) { 2cH RiRT
int[] temp=new int[data.length]; gTXpaB<
mergeSort(data,temp,0,data.length-1); rB$~,q&.V
} ,MNv}w@
E|"SMA,
private void mergeSort(int[] data, int[] temp, int l, int r) { m^}|LB:5
int i, j, k; YHQ]]#'
int mid = (l + r) / 2; 3HpqMz
if (l == r) M7cD!s@'I
return; r)pt(*KHo
if ((mid - l) >= THRESHOLD) Sb/?<$>
mergeSort(data, temp, l, mid); ,"(G
else )>:~XA|?
insertSort(data, l, mid - l + 1); A}(]J!rc
if ((r - mid) > THRESHOLD) pE)NSZ
mergeSort(data, temp, mid + 1, r); Ee2P]4_d
else "u!gfG?oH
insertSort(data, mid + 1, r - mid); dX cbS<
?J2A1iuq3
for (i = l; i <= mid; i++) { -je} PwT
temp = data; z7bJV/f
} `}l%61n0
for (j = 1; j <= r - mid; j++) { tr[}F7n9
temp[r - j + 1] = data[j + mid]; X$we\t
} #dUKG8-HJ
int a = temp[l]; <-`.u`
int b = temp[r]; ,%*UF6B M
for (i = l, j = r, k = l; k <= r; k++) { BX0lk
if (a < b) { $h{m")]
data[k] = temp[i++]; :^3)[.m
a = temp; ;rT'~?q
} else { Y:ly x-lj
data[k] = temp[j--]; I"88O4\@
b = temp[j]; Hyy b0c^=
} QIGUi,R
} eyDV911
} C6;2Dd]"N
w~b:9_reY
/** $:F+Nf 8
* @param data n9+33^ PT
* @param l ?l/6DT>e
* @param i pD%(Y^h?
*/ O D}RnKL
private void insertSort(int[] data, int start, int len) { ~~OFymQ%?q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CvY+b^;
} g%f5hy
} *#XZ*Ga
} '6dVe2V
} \Mg_Q$
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堆排序： e.n(NW
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package org.rut.util.algorithm.support; 1P!)4W
[P`e@$
import org.rut.util.algorithm.SortUtil; #uhUZq
2e1KF=N+
/** 6WY/[TC-
* @author treeroot @=Q!a (g
* @since 2006-2-2 XGx[Ny_A2
* @version 1.0 o%t4WQ|bj
*/ 5CFNBb%Xy
public class HeapSort implements SortUtil.Sort{ Qu61$!
VV$t*9w
/* (non-Javadoc) ,/{e%J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {JgY-#R?{(
*/ gm-[x5O"
public void sort(int[] data) { ZZT #V%Q=u
MaxHeap h=new MaxHeap(); ,0W^"f.g{m
h.init(data); 5g7@Dj,.
for(int i=0;i h.remove(); e?]5q ez
System.arraycopy(h.queue,1,data,0,data.length); EnM
} .HS6DOQ
oFWb.t9<
private static class MaxHeap{ t5-O-AI[b{
B}iEhWO6
void init(int[] data){ k8w\d+!v
this.queue=new int[data.length+1]; 8z#Qp(he
for(int i=0;i queue[++size]=data; F^u12R)
fixUp(size); >NKJ@4Y
} xs{pGQ6Q
} f jx`|MJ
nqyD>>
private int size=0; _? gCOr
xqG<R5k>>
private int[] queue; bE_8NA"2
qiNVaV\wr|
public int get() { g_Z tDxz
return queue[1]; L.HeBeO
} Al-`}g+^
:>1nkm&Eg
public void remove() { ==dKC;
SortUtil.swap(queue,1,size--); YaC%69C'
fixDown(1); FH~:&;
} !T`oHs
file://fixdown Xqf,_I=V
private void fixDown(int k) { |THpkfW
int j; :o'x?]
while ((j = k << 1) <= size) { o!M8V ^vW
if (j < size %26amp;%26amp; queue[j] j++; 4Z)s8sDKW
if (queue[k]>queue[j]) file://不用交换 ~bLx2=-"
break; \R#SoOd
SortUtil.swap(queue,j,k); +=3=%%?C
k = j; 6X \g7bg
} W;vNmg}mn
} tk"+ u_uw
private void fixUp(int k) { nuce(R
while (k > 1) { X94a
int j = k >> 1; mJSfn"b}K
if (queue[j]>queue[k]) c#n 2!
break; }s~c(sL?;
SortUtil.swap(queue,j,k); %fj5;}E.
k = j; 6cH8Jr _
} ORExI.<`W
} }t H$:Z
0pZvW
} VXeO}>2S
EgjJywNhd2
} \2\{c1df
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SortUtil： -> cL)
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package org.rut.util.algorithm; k#].nQG
QZzamT)"
import org.rut.util.algorithm.support.BubbleSort; :X0L6y)u
import org.rut.util.algorithm.support.HeapSort; p`"k=tZ{
import org.rut.util.algorithm.support.ImprovedMergeSort; aB,-E>+
import org.rut.util.algorithm.support.ImprovedQuickSort; 5'zXCHt
import org.rut.util.algorithm.support.InsertSort; '2(m%X\6
import org.rut.util.algorithm.support.MergeSort; HlGSt$woX
import org.rut.util.algorithm.support.QuickSort; -o ).<&#
import org.rut.util.algorithm.support.SelectionSort; UqP{Cyy{
import org.rut.util.algorithm.support.ShellSort; ]\(8d[4
WXQ@kQD
/** X6HaC+P
* @author treeroot 02-ql F@i
* @since 2006-2-2 MEDh
* @version 1.0 kK? SG3
*/ PYkhY;*
public class SortUtil { M+/G>U
public final static int INSERT = 1; Vj*-E
public final static int BUBBLE = 2; ^CkMk 1
public final static int SELECTION = 3; H1bR+2s
public final static int SHELL = 4; >e;-$$e
public final static int QUICK = 5; qRt!kWW
public final static int IMPROVED_QUICK = 6; +?_!8N8
public final static int MERGE = 7; >US*7m }
public final static int IMPROVED_MERGE = 8; $L/`nd
public final static int HEAP = 9; :{7+[LcH7
/R#zu_i
public static void sort(int[] data) { ">H*InF
sort(data, IMPROVED_QUICK); {9x_E {
} ATs_d_Sz
private static String[] name={ Z vysLHj
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^m>4<~/
}; 4V+bE$Wu
1h,iWHC
private static Sort[] impl=new Sort[]{ Itl8#LpLM
new InsertSort(), l1+l@r\
new BubbleSort(), f"MID6
new SelectionSort(), +:MSY p
new ShellSort(), @Cj!MZ=T
new QuickSort(), $RD~,<oEm
new ImprovedQuickSort(), ?cV,lak
new MergeSort(), NoI|Dz
new ImprovedMergeSort(), o4Q?K.9c
new HeapSort() QYH-"-)
}; \nl(tU#j
SI7rTJ]/
public static String toString(int algorithm){ 3c<aI=$^
return name[algorithm-1]; LF dvz0
} z0 "DbZ;d
>*-%:ub
public static void sort(int[] data, int algorithm) { GP};~
impl[algorithm-1].sort(data); c./\sN@
} VvhfD2*T
1Bh"'9-!JT
public static interface Sort { T ,lM(2S[
public void sort(int[] data); }3Es&p$9
} Z\!,f.>g
D!j/a!MaKk
public static void swap(int[] data, int i, int j) { xl}rdnf}
int temp = data; S=@+qcI
data = data[j]; }k^uup*{
data[j] = temp; .;? Bni
} {U5sRM|I
} pBsb>wvej