[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; b2&0Hx
} vnZC,J `
int i1=l; U|Ta4W`k\
int i2=mid+1; [:SWi1cK2
for(int cur=l;cur<=r;cur++){ <lE<f+
if(i1==mid+1) ]|PiF+
data[cur]=temp[i2++]; _^%,x
else if(i2>r) n]o<S+z
data[cur]=temp[i1++]; vT,AMja
else if(temp[i1] data[cur]=temp[i1++]; q6V>zi
else QX'qyojxN
data[cur]=temp[i2++]; vuY~_
} 5uj?#)N
} CN8Y\<Ar
H%Q7D-
} ;u46Z
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改进后的归并排序: JO6)-U$7UG
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package org.rut.util.algorithm.support; hy"\RW
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import org.rut.util.algorithm.SortUtil; ?QdWrE_
PP33i@G
/** 57
* @author treeroot [~c|mOk
* @since 2006-2-2 a'yK~;+_9
* @version 1.0 SbrecZ
*/ )W _v:?A9
public class ImprovedMergeSort implements SortUtil.Sort { 3K0A)W/YEs
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private static final int THRESHOLD = 10; dn$!&
w-L=LWL\
/* PmEsN&YP]
* (non-Javadoc) 3kp+<$
* 6) [H?Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XrGglBIV
*/ V#gK$uv
public void sort(int[] data) { gu.}M:u
int[] temp=new int[data.length]; eiaFaYe\
mergeSort(data,temp,0,data.length-1); XW)lDiJl
} o~y;j75{.*
Vd+T$uC
private void mergeSort(int[] data, int[] temp, int l, int r) { C{xaENp
int i, j, k; ^EQ<SCh
int mid = (l + r) / 2; F8,RXlGfA[
if (l == r) ,G?WAOy,
return; h_,i&d@(
if ((mid - l) >= THRESHOLD) j@3Q;F0ba
mergeSort(data, temp, l, mid); q\4Xs$APq
else 9W1YW9rL
insertSort(data, l, mid - l + 1); LG|fq/;
if ((r - mid) > THRESHOLD) czgO ;3-C
mergeSort(data, temp, mid + 1, r); " 9wvPC ^
else yEoF4bt
insertSort(data, mid + 1, r - mid); Ww+IWW@
2*l/3VW
for (i = l; i <= mid; i++) { bUdLs.:
temp = data; Q1I6$8:7
} x}I+Iggi
for (j = 1; j <= r - mid; j++) { J$w<$5UY
temp[r - j + 1] = data[j + mid]; C]`$AqKl
} qvKG-|j
int a = temp[l]; aa/(N7
int b = temp[r]; WUXx;9>
for (i = l, j = r, k = l; k <= r; k++) { o&)8o5
if (a < b) { ?(F6#"/E
data[k] = temp[i++]; ,pQZ@I\z
a = temp; dhf!o0'1M
} else { u5b|#&-mX
data[k] = temp[j--]; Ma']?Rb`
b = temp[j]; S3*`jF>q
} h-K_Lr]
} vm7z,FfN
} lc1(t:"[
qUW! G&R
/** 4=.89T#<
* @param data m{cGK`/\
* @param l &P}_bx
* @param i G+"t/?/
*/ /1V xc 6
private void insertSort(int[] data, int start, int len) { )9'K($
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7<#U(,YEA
} ;oKZ!ND
} 6"5A%{J
} p\tm:QWD;
} qHplJ "
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堆排序： Ls$D$/:q?
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package org.rut.util.algorithm.support; %G/hD
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import org.rut.util.algorithm.SortUtil; (pCrmyB
FQ7T'G![
/** < #}5IQ5`Z
* @author treeroot ~IfJwBn-i
* @since 2006-2-2 z2_*%S@
* @version 1.0 .B]MpmpK
*/ IS{wtuA.
public class HeapSort implements SortUtil.Sort{ i$:*Pb3mV
Xq]w<$
/* (non-Javadoc) FaQe_;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b_#m}yZ6
*/ gmO!
public void sort(int[] data) { 9`A;U|~E@
MaxHeap h=new MaxHeap(); Hz1%x
h.init(data); t?x<g<PJ4
for(int i=0;i h.remove(); rq/yD,I,
System.arraycopy(h.queue,1,data,0,data.length); r6MMCJ|G
} ;4^Rx
fF$<7O)+]
private static class MaxHeap{ L_uVL#To
RXpw!
void init(int[] data){ rb2S7k0{
this.queue=new int[data.length+1]; o WrKM
for(int i=0;i queue[++size]=data; 'EEJU/"u
fixUp(size); D9CaFu
} J6s`'gFns
} qo90t{|c
'KS,'%
private int size=0; nQX:T;WL@
uD$u2
private int[] queue; hk(ZM#Bh
<EB+1GFuI
public int get() { [#<-ZC#T*
return queue[1]; @fZ,.2ar
} |mdVdD~go
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public void remove() { 3s,g*
SortUtil.swap(queue,1,size--); 7a=gH2]&
fixDown(1); */)c?)"
} DnMwUykF>0
file://fixdown av}k)ZT_
private void fixDown(int k) { < Mn ;
int j; SO|NaqWa
while ((j = k << 1) <= size) { QuF:p
if (j < size %26amp;%26amp; queue[j] j++; hLd^ agX
if (queue[k]>queue[j]) file://不用交换 TluW-S
break; zUkgG61
SortUtil.swap(queue,j,k); dUeN*Nq&(,
k = j; BOb">6C
} JgKO|VO
} @w#-aGJO
private void fixUp(int k) { q1$N>;&
while (k > 1) { p*R;hU
int j = k >> 1; }{K) 4M
if (queue[j]>queue[k]) W7R<%?
break; UN;H+gNnN
SortUtil.swap(queue,j,k); 0U(@=7V
k = j; {3>$[bT
} Ga-k
} :j9l"5"
<Dl*l{zba
} VuhGx:Xl
*KZYv=s,u
} DbBcQ%
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SortUtil： )0.kv2o.
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package org.rut.util.algorithm; 8O5s`qKMYT
]}<}lI9
import org.rut.util.algorithm.support.BubbleSort; i^X]j
import org.rut.util.algorithm.support.HeapSort; xBThq?N?
import org.rut.util.algorithm.support.ImprovedMergeSort; zsEc(
import org.rut.util.algorithm.support.ImprovedQuickSort; 9|^2",V
import org.rut.util.algorithm.support.InsertSort; {k>&?Vd!
import org.rut.util.algorithm.support.MergeSort; <$A
import org.rut.util.algorithm.support.QuickSort; q~b&
import org.rut.util.algorithm.support.SelectionSort; . oF &Ff/[
import org.rut.util.algorithm.support.ShellSort; |sJ[0z
vjbASFF0=
/** f O}pj:
* @author treeroot guq{#?}
* @since 2006-2-2 d\&U*=
* @version 1.0 /kZebNf6H
*/ }Sm(]y
public class SortUtil { KB3Htw%W[+
public final static int INSERT = 1; ?hZAxR\
public final static int BUBBLE = 2; pz!Zs."f)
public final static int SELECTION = 3; 2RVN\?s:
public final static int SHELL = 4; 7X`g,b!
public final static int QUICK = 5; m4[;(1
public final static int IMPROVED_QUICK = 6; |{z:IQLv
public final static int MERGE = 7; YquI$PV _
public final static int IMPROVED_MERGE = 8; 'Cb6Y#6
public final static int HEAP = 9; uanhr)Ys
gDQ^)1k
public static void sort(int[] data) { G)AqbY
sort(data, IMPROVED_QUICK); %^)fmu
} L\6M^r >
private static String[] name={ pxA?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A9KET$i@v
}; .Yamc#A-
m<<+
private static Sort[] impl=new Sort[]{ ?(@ 7r_j
new InsertSort(), JU4<|5H
new BubbleSort(), NlA,'`,
new SelectionSort(), oM X
new ShellSort(), 8 `v-<J
new QuickSort(), n2"a{Ofhlf
new ImprovedQuickSort(), gldAP:
new MergeSort(), Q4#.X=.d
new ImprovedMergeSort(), on!,c>nNa
new HeapSort() HDz5&7* .
}; f$o_e90mu
vz@A;t
public static String toString(int algorithm){ {UX!go^J
return name[algorithm-1]; gT6z9
} #>a\>iKQ2q
J@/kIrx
public static void sort(int[] data, int algorithm) { [7:,?$tC
impl[algorithm-1].sort(data); CQc+#nRe
} o3XvRj
@JiLgIe`
public static interface Sort { 0.Q Ujw
public void sort(int[] data); %HhBt5w
} pN,u`[
+N]J5Ve-`t
public static void swap(int[] data, int i, int j) { +WZX.D
int temp = data; k`cfG\;r
data = data[j]; ^L,K& Jd
data[j] = temp; =bAx,,D#
} ]"pVj6O
} }g@v`5