[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; F[mL_JU
} S,,,D+4
int i1=l; uuW._$.A>
int i2=mid+1; `+cc{k
for(int cur=l;cur<=r;cur++){ 0w}OE8uq
if(i1==mid+1) ]wCg'EUB
data[cur]=temp[i2++]; f]N2(eM
else if(i2>r) l1XA9>n
data[cur]=temp[i1++]; zI77#AUM
else if(temp[i1] data[cur]=temp[i1++]; uc4#giCD
else (;-< @~2
data[cur]=temp[i2++]; $ \0)~cy
} qg6283'?
} ousvsP%'
n5h4]u
} K9h{sC
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改进后的归并排序: *^+8_%;1
qELy'\
package org.rut.util.algorithm.support; k_$:?$
}cuU5WQ?%
import org.rut.util.algorithm.SortUtil; `) s]T.-
fH[Yc>(oj
/** LRl2@&z<
* @author treeroot ikd~k>F
* @since 2006-2-2 c+P.o.k;
* @version 1.0 K1]m:Y<
*/ Obwj=_+upd
public class ImprovedMergeSort implements SortUtil.Sort { -)_"7}|u5
_GSl}\
private static final int THRESHOLD = 10; KLi&TmIB
YJi C}.4Q
/* ]/>(C76
* (non-Javadoc) H0tjBnu
* ~kM# lh7At
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uh#"4-v
*/ }: v&Nc
public void sort(int[] data) { CYD&#+o
int[] temp=new int[data.length]; 8wJfGY
mergeSort(data,temp,0,data.length-1); w+c%Y\:
} ]Q-*xho
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private void mergeSort(int[] data, int[] temp, int l, int r) { iOk^RDG+
int i, j, k; ;#a^M*e
int mid = (l + r) / 2; zyb>PEd.
if (l == r) znm3b8ns
return; v%8.o%G
if ((mid - l) >= THRESHOLD) Bg.~#H
mergeSort(data, temp, l, mid); &|cg`m
else Hg<d%7.
insertSort(data, l, mid - l + 1); VnqgN
if ((r - mid) > THRESHOLD) _Ec9g^I10
mergeSort(data, temp, mid + 1, r); 4 XSEN]F
else Y#[jDS(ip
insertSort(data, mid + 1, r - mid); Qf0]7
}',/~T6
for (i = l; i <= mid; i++) { "`;$wA
temp = data; ;VVKn=X=S=
} :5`=9_|
for (j = 1; j <= r - mid; j++) { 3sUTdCnNf
temp[r - j + 1] = data[j + mid]; 7OSk0%Q,
} -DWyKR= j"
int a = temp[l]; oT9dMhx8
int b = temp[r]; 90ZMO7_
for (i = l, j = r, k = l; k <= r; k++) { wQ!C9Gp3e
if (a < b) { 9p|;Hh:
data[k] = temp[i++]; Z{<&2*
a = temp; IpX.ube
} else { y>4r<YZQ
data[k] = temp[j--]; 1?k{jt~
b = temp[j]; AXbDCDA
} AP1Eiv<Hub
} "'Bx<FA
} (t$jb|Oa
3-^z<*
/** xLID@9Hbu
* @param data \v|nRn,`-
* @param l |]s/NNU
* @param i 9eG{"0)
*/ s.VtmAH
private void insertSort(int[] data, int start, int len) { l-?B1gd,l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); of?hP1kl[
} K9\p=H^T7
} }.+{M.[}
} $Sz@u"ig%
} -B+Pl*
~cC=DeX
堆排序： SxyXz8+e[
T >BlnA
package org.rut.util.algorithm.support; # !:u*1
|a||oyrN
import org.rut.util.algorithm.SortUtil; &~9'7 n!
e+`LtEve0
/** .x6c.Y.S
* @author treeroot #J4{W84B
* @since 2006-2-2 W|C>X=zTi
* @version 1.0 ^r4@C2#vzJ
*/ \PHbJN:BI
public class HeapSort implements SortUtil.Sort{ SQ$|s%)oB
c*fMWtPp
/* (non-Javadoc) d2cslDd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Kyn[4Bu!?
*/ F@4TD]E0^
public void sort(int[] data) { L$T23*9XY
MaxHeap h=new MaxHeap(); Tf0"9
h.init(data); H rMH
for(int i=0;i h.remove(); ^?-SMcUHB
System.arraycopy(h.queue,1,data,0,data.length); )1E[CIaXK
} \W%Aeg*c
cOhx
private static class MaxHeap{ ,drbj.0-
g4p-$WyT8>
void init(int[] data){ }02#[vg
this.queue=new int[data.length+1]; nw.,`M,N
for(int i=0;i queue[++size]=data; I%4)%
fixUp(size); nYA@t=t0
} vIMLUL0
} |->P|1 P
`Mg&s*
private int size=0; 3u&>r-V6Fn
*?l-:bc]
private int[] queue; $C&y-Hnar
H]zi>;D
public int get() { 6R`q{}.
return queue[1]; DL*/hbG
} S9cAw5E(yN
)iKV"jsC
public void remove() { -MA/:EB
SortUtil.swap(queue,1,size--); )Id.yv}_
fixDown(1); QYS 1.k
} zc1y)s0G
file://fixdown Y.7iKMp(
private void fixDown(int k) { CO%o.j=1
int j; utH/E7^8
while ((j = k << 1) <= size) { F=T};b
if (j < size %26amp;%26amp; queue[j] j++; seNJ6p=`
if (queue[k]>queue[j]) file://不用交换 v|]1x2191
break; 2cnyq$4k
SortUtil.swap(queue,j,k); j'\!p):H
k = j; f*(W%#*|
} Q/u2Q;j>
} 9Q*T'+V
private void fixUp(int k) { DK6^\k][V
while (k > 1) { xAZ-_}'tW
int j = k >> 1; q3_ceXYU
if (queue[j]>queue[k]) uT\|jv,
break; w#-J ?/m
SortUtil.swap(queue,j,k); @.D1_A
k = j; @2X{e7+D
} o+}>E31a
} o.o$dg(r!
w6Owfq'v
} >14x.c
}{oZdO
} xJNV^u
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SortUtil： i(hL6DLD
p-qt?A
package org.rut.util.algorithm; mFGiysM
DI>SW%)>
import org.rut.util.algorithm.support.BubbleSort; z\kiYQ6kA
import org.rut.util.algorithm.support.HeapSort; eH0^d5bH
import org.rut.util.algorithm.support.ImprovedMergeSort; N(7UlS,u'
import org.rut.util.algorithm.support.ImprovedQuickSort; BQOit.
import org.rut.util.algorithm.support.InsertSort; ,NA _pvH)
import org.rut.util.algorithm.support.MergeSort; Z)Zc9SVC
import org.rut.util.algorithm.support.QuickSort; K}OY!|
import org.rut.util.algorithm.support.SelectionSort; j=],n8_i
import org.rut.util.algorithm.support.ShellSort; Ra!Br6
_ Vo35kA
/** g)L?C'BG
* @author treeroot ZcQ@%XY3~
* @since 2006-2-2 *)8!~Hs
* @version 1.0 L-,C5^
*/ }Dc7'GZ
public class SortUtil { w>TlM*3D/
public final static int INSERT = 1; ]b+Nsr~
public final static int BUBBLE = 2; 3$~oQC
public final static int SELECTION = 3; 2jT2~D.U1
public final static int SHELL = 4; ab!Cu8~v
public final static int QUICK = 5; SQSPdR+
public final static int IMPROVED_QUICK = 6; VfFXH,j
public final static int MERGE = 7; flXDGoW
public final static int IMPROVED_MERGE = 8; 8*7,qX
public final static int HEAP = 9; l5/!0]/
pWm==Ds|
public static void sort(int[] data) { 141G~@-
sort(data, IMPROVED_QUICK); 8TE2q Pm
} 0Mo?9??
private static String[] name={ }2!=1|}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" JtbwY@R
}; <rbzsn"a
\'>ZU-V
private static Sort[] impl=new Sort[]{ @5,Xr`]
new InsertSort(), "NMSLqO
new BubbleSort(), [" PRxl
new SelectionSort(), YD@n8?~$$
new ShellSort(), LJ{P93aq`^
new QuickSort(), {;2Gl$\r
new ImprovedQuickSort(), D=^|6}
new MergeSort(), cvk$ I"q+
new ImprovedMergeSort(), TGSkJ 1Lx
new HeapSort() VJoobu1h
}; p*Q *}V
XD8Q2un
public static String toString(int algorithm){ sWGc1jC?.F
return name[algorithm-1]; >s;>"]
} mE)I(< %
/4M~ 6LT`
public static void sort(int[] data, int algorithm) { vxt<}h5J/!
impl[algorithm-1].sort(data); +#LD@)G
} Q|] 9
mh:eUFe
public static interface Sort { <?E~Qc t
public void sort(int[] data); Oe_*(q&
} R\MFh!6sn
gc[BP>tl\
public static void swap(int[] data, int i, int j) { =}xH6^It
int temp = data; py':UQS*q
data = data[j]; qHf8z;lc
data[j] = temp; y7@q]~%
} of<(4<T
} lWRRB&8