[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; y_EkW f
} Tlrr02>B{
int i1=l; IN=pki|.
int i2=mid+1; VH[r@Pn
for(int cur=l;cur<=r;cur++){ |T?wM/
if(i1==mid+1) sqTBlP
data[cur]=temp[i2++]; ,K9\;{C
else if(i2>r) 3D_Ky Z~M+
data[cur]=temp[i1++]; KilgeN:
else if(temp[i1] data[cur]=temp[i1++]; CvfXm
else >2h|$6iWP
data[cur]=temp[i2++]; X8~dFjhX
} +v4P9V|s
} j_N><_Jc
=OfU#i"c
} 7pMl:\
3 i<,#FaL
改进后的归并排序: r>73IpJI
#p&&w1
package org.rut.util.algorithm.support; h'VN& T,
?_mcg8A@@*
import org.rut.util.algorithm.SortUtil; 5v"r>q[ X
uD4=1g6[s
/** !`5[(lm
* @author treeroot pRI<L'
* @since 2006-2-2 @P=St\;VP
* @version 1.0 OS8 ^mC
*/ +Qy*s1fit
public class ImprovedMergeSort implements SortUtil.Sort { ~3byAL
uC\FW6K=m
private static final int THRESHOLD = 10; L%](C
u8ofgcFYE
/* ^0"^Xk*
* (non-Javadoc) Ow7NOhw
* RC7|@a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *Q2;bmIc
*/ :g)0-gN
public void sort(int[] data) { k.bzh.
int[] temp=new int[data.length]; W>C!V
mergeSort(data,temp,0,data.length-1); v*Tliw`-U
} dWHl<BUm
u I$|M
private void mergeSort(int[] data, int[] temp, int l, int r) { OLXkiesK{
int i, j, k; s_]p6M
int mid = (l + r) / 2; $=dp)
if (l == r) 2|'v[
return; a*LT<N
if ((mid - l) >= THRESHOLD) rZRcy9$y>
mergeSort(data, temp, l, mid); eXJt9olI
else 5dffFe
insertSort(data, l, mid - l + 1); ]zp5 6U|xa
if ((r - mid) > THRESHOLD) 3:Bwf)*
mergeSort(data, temp, mid + 1, r); V|=PaO
else B$~oZ'4v
insertSort(data, mid + 1, r - mid); whb|N2
DLMG<4Cd~
for (i = l; i <= mid; i++) { e$F]t*)Xa
temp = data; z;1y7W!v
} %bI(
for (j = 1; j <= r - mid; j++) { |8I #`
temp[r - j + 1] = data[j + mid]; 8r '
} .DSn H6O
int a = temp[l]; _^4\z*x
int b = temp[r]; ;\`~M
for (i = l, j = r, k = l; k <= r; k++) { Enee\!@v
if (a < b) { "zW3dKVc
data[k] = temp[i++]; #PnuR2s7.
a = temp; S,T?(lSl
} else { }.Eq_wP<
data[k] = temp[j--]; WqN=D5
b = temp[j]; \m-fLX
} ~~:w^(s9
} j,Sg?&"%=
} ~ILig}I
;9r Z{'i+|
/** Q(SVJ
* @param data 1xK'1g72
* @param l xt]Z{:.
* @param i v-6"*EP
*/ YwGc[9=n
private void insertSort(int[] data, int start, int len) { r\]yq-_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NfLvK o8
} l,uYp"F,ps
} M0!;{1
} +3.Ik,Z}zq
} N[4v6GS
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堆排序： ?]gZg[
Ke[doQ#c
package org.rut.util.algorithm.support; .(o]d{ '-}
Li ,B,
import org.rut.util.algorithm.SortUtil; E_&Hje|J_[
".L+gn}u-
/** ^q6H =Dl
* @author treeroot OJE<2:K
* @since 2006-2-2 :PtpIVAosg
* @version 1.0 Hh @q;0ni
*/ K%LDOVE8e
public class HeapSort implements SortUtil.Sort{ H e]1<tx
E/cA6*E[.<
/* (non-Javadoc) 70_T;K6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CCKg,v
*/ G%)?jg@EA
public void sort(int[] data) { >Bp%~8f
MaxHeap h=new MaxHeap(); xO'I*)
h.init(data); ~45u a
for(int i=0;i h.remove(); GZT}aMMSJ
System.arraycopy(h.queue,1,data,0,data.length); }C>Q
} 1"46OCu{
dJ\6m!Mp
private static class MaxHeap{ A9PXu\%y
q0WW^jwQ
void init(int[] data){ )gdv!
this.queue=new int[data.length+1]; =/=x"q+X
for(int i=0;i queue[++size]=data; Ab7hW(/
fixUp(size); /uI/8>p(
} oR}ir
} y8: 0VZox
o;Ijv\Em
private int size=0; 4W8rb'B!Ay
|Hn[XRsf
private int[] queue; q!W~>c!
1!8*mk_R{
public int get() { 20m6-rkI<}
return queue[1]; P Y +~,T2
} O<4i)Lx2
2>Kq)Ii
public void remove() { 1_:1cF{w
SortUtil.swap(queue,1,size--); UwtOlV:G{
fixDown(1); Ku LZg
} wo2^,Y2z+
file://fixdown g$VcT\X
private void fixDown(int k) { cJA0$)JP&
int j; x( w <U1
while ((j = k << 1) <= size) { O%9Cq}*
if (j < size %26amp;%26amp; queue[j] j++; 'R*gSqx~
if (queue[k]>queue[j]) file://不用交换 /Nq!^=
break; T(+F6d=1
SortUtil.swap(queue,j,k); V5rnI\:7
k = j; ^7q=E@[e
} !mBsDn(J
} n ! qm
private void fixUp(int k) { $N;!. 5lX3
while (k > 1) { Lhl)pP17
int j = k >> 1; a#H=dIj
if (queue[j]>queue[k]) x$CpUy{6
break; oT 8
SortUtil.swap(queue,j,k); Td[w<m+p<P
k = j; 0!=e1_
} GG"0n{>0
} o0-e,F>u
M)Rp+uQ
} ~m!>e])P?X
qq-&z6;$
} g|<)J-`Q
=khjD[muC
SortUtil： X2@mQ&n
\$;\,p p
package org.rut.util.algorithm; P@9>4}r$
,<hXNN
import org.rut.util.algorithm.support.BubbleSort; ulfpop*2
import org.rut.util.algorithm.support.HeapSort; .u7d
import org.rut.util.algorithm.support.ImprovedMergeSort; S !c/"~X+
import org.rut.util.algorithm.support.ImprovedQuickSort; d!8q+FI
import org.rut.util.algorithm.support.InsertSort; 1ISA^< M
import org.rut.util.algorithm.support.MergeSort; Qm`f5-d
import org.rut.util.algorithm.support.QuickSort; uW>AH@Pij
import org.rut.util.algorithm.support.SelectionSort; 3FPy"[[
import org.rut.util.algorithm.support.ShellSort; &Wd,l$P<O
2?t(%uf]
/** e::5|6x
* @author treeroot hPr
* @since 2006-2-2 iN<5[ztd
* @version 1.0 6?*iIA$b
*/ ]p'Qk
public class SortUtil { N["c*=x
public final static int INSERT = 1; ZfT%EPoZ:
public final static int BUBBLE = 2; -Qnnzp$]
public final static int SELECTION = 3; nWFp$tJ/R
public final static int SHELL = 4; ^'EEry
public final static int QUICK = 5; :^%soEi
public final static int IMPROVED_QUICK = 6; I-/PzL<W P
public final static int MERGE = 7; y=h2_jt
public final static int IMPROVED_MERGE = 8; vCH>Fj"7
public final static int HEAP = 9; q,nj|9z V
gEKJrAA
public static void sort(int[] data) { }/c.>U
sort(data, IMPROVED_QUICK); P05_\ t
} ?Tuh22J{Q
private static String[] name={ bDUGzezP<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" s+zb[3}
}; 7]e]Y>wZap
6/4OFvL1
private static Sort[] impl=new Sort[]{ "vLqYc4$
new InsertSort(), nOQ+oqM<
new BubbleSort(), mf}?z21vD
new SelectionSort(), :NbD^h)R
new ShellSort(), O.rk!&N
new QuickSort(), v@>hjie
new ImprovedQuickSort(), P]Gsc
new MergeSort(), *\VQ%_wg
new ImprovedMergeSort(), o\|dm."f
new HeapSort() Dj!J 4uD
}; YY7:WQS
\!cqeg*53
public static String toString(int algorithm){ 8.-PQ
return name[algorithm-1]; *<9D]
} I$f:K]|.m!
Fi5,y;]R
public static void sort(int[] data, int algorithm) { $,i:#KT`
impl[algorithm-1].sort(data); K:'pK1zy
} FC]? T
*3"C"4S
public static interface Sort { 9HTb
public void sort(int[] data); 00;=6q]TA
} uU5:,Wy+dg
&<_sXHg<x
public static void swap(int[] data, int i, int j) { iZjvO`@[
int temp = data; ][G<CO`k
data = data[j]; _"WQi}Mm
data[j] = temp; `n^jU92
} Kq{s^G
} ~S-x-cZ