[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; '1s0D]
} :Fvrs( x
int i1=l; u:_,GQ )\
int i2=mid+1; ;;N9>M?b
for(int cur=l;cur<=r;cur++){ OpYY{f
if(i1==mid+1) AkQ~k0i}b
data[cur]=temp[i2++]; !d0kV,F:
else if(i2>r) %OOl'o"V{s
data[cur]=temp[i1++]; `RL"AH:+
else if(temp[i1] data[cur]=temp[i1++]; j#q-^h3H
else Z>5b;8
data[cur]=temp[i2++]; pg)WKbV
} *CI#+P
} 5]Y?m'
}S<2A7)el
} kL"2=7m;
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改进后的归并排序: ,1o FPa{?
OYTkV}tG
package org.rut.util.algorithm.support; 5C5sgR C
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import org.rut.util.algorithm.SortUtil; JrRH\+4K
j HJ`,#
/** L0WN\|D
* @author treeroot 'AS|ZRr/
* @since 2006-2-2 b2&0Hx
* @version 1.0 vnZC,J `
*/ U|Ta4W`k\
public class ImprovedMergeSort implements SortUtil.Sort { [:SWi1cK2
<lE<f+
private static final int THRESHOLD = 10; ]|PiF+
_^%,x
/* n]o<S+z
* (non-Javadoc) vT,AMja
* q6V>zi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QX'qyojxN
*/ n[Y~]
public void sort(int[] data) { 5uj?#)N
int[] temp=new int[data.length]; CN8Y\<Ar
mergeSort(data,temp,0,data.length-1); *mvlb (' &
} H*'IK'O
%2V?,zY@
private void mergeSort(int[] data, int[] temp, int l, int r) { ;,:`1UI
int i, j, k; +*/Zu`kzX
int mid = (l + r) / 2; z/@slT
if (l == r) 9Y_HyOZ*GX
return; fSvM(3Y<Qh
if ((mid - l) >= THRESHOLD) _5Ct]vy
mergeSort(data, temp, l, mid); R)s:rJQ=p
else ,S]7 'UP
insertSort(data, l, mid - l + 1); jLHkOk5{:
if ((r - mid) > THRESHOLD) Sk\K4
mergeSort(data, temp, mid + 1, r); :emiQ
else Sw,+p
insertSort(data, mid + 1, r - mid); Ig0VW)@
_H7x9 y=
for (i = l; i <= mid; i++) { #( 146
temp = data; N)\. [v
} <FkFs{(t
for (j = 1; j <= r - mid; j++) { O)n~](sC\
temp[r - j + 1] = data[j + mid]; 9gK`E
} M\Ye<Tk
int a = temp[l]; HJ[cM6$2
int b = temp[r]; uo%)1NS!
for (i = l, j = r, k = l; k <= r; k++) { rlSeu5X6
if (a < b) { ~ =2PU$u
data[k] = temp[i++]; x@;m8z0
a = temp; SP_75BJ
} else { R=2FNP
data[k] = temp[j--]; !@*7e:l
b = temp[j]; `%"\@<
} #r~# I}U
} YWO)HsjP
} bI9~jWgGp
~H<6gN<j(.
/** yg=q;Z>[~
* @param data ~[nSXnPO
* @param l H;k~oIsk
* @param i 3<f}nfB%r?
*/ u(F_oZ~
private void insertSort(int[] data, int start, int len) { 9ZsVy
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w4{<n/"
} paE[rS\
} 3J|F?M"N7
} }?_?V&K|
} 4-y:/8
By",rD- r
堆排序： :v&$o'Sak
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package org.rut.util.algorithm.support; u$Jz~:=,
6@F9G4<Z
import org.rut.util.algorithm.SortUtil; sW'AjI
17"uf.G
/** NgGp
* @author treeroot `w7v*h|P
* @since 2006-2-2 W ]?G}Q;
* @version 1.0 X Dm[Gc>(~
*/ }Gm>`cw-
public class HeapSort implements SortUtil.Sort{ li'YDtMKCY
yT"Eq"7/Y#
/* (non-Javadoc) c&?m>2^6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qJa H,
*/ *-=(Q`3
public void sort(int[] data) { RSyUaA
MaxHeap h=new MaxHeap(); PI:4m%[
h.init(data); (pCrmyB
for(int i=0;i h.remove(); ):68%,
System.arraycopy(h.queue,1,data,0,data.length); rv^@,8vq
} z2_*%S@
*ebSq)
private static class MaxHeap{ i$:*Pb3mV
%G_B^p4
void init(int[] data){ ]7F=u!/`<C
this.queue=new int[data.length+1]; vrhT<+q
for(int i=0;i queue[++size]=data; ^w@%cVh
fixUp(size); ]}-7_n#cC
} rq/yD,I,
} kHghPn?8]
0w\zLU
private int size=0; %S@ZXf~:
\K{0L
private int[] queue; 9N%We|L,c
n.`($yR_
public int get() { 6xe*E[#k\
return queue[1]; p$NQyS5C"S
} QT< }] 0
1R{!]uh
public void remove() { Q_Q''j(r6b
SortUtil.swap(queue,1,size--); ['X]R:3h
fixDown(1); F3v!AvA|
} x=hiQ>BIO0
file://fixdown -aPg#ub
private void fixDown(int k) { ?Wr+Q
int j; b9KP( _
while ((j = k << 1) <= size) { M=.n7RY-
if (j < size %26amp;%26amp; queue[j] j++; <CYd+! (
if (queue[k]>queue[j]) file://不用交换 j^j1
break; \:# L)
SortUtil.swap(queue,j,k); av}k)ZT_
k = j; < Mn ;
} SO|NaqWa
} QuF:p
private void fixUp(int k) { hLd^ agX
while (k > 1) { TluW-S
int j = k >> 1; L3u&/Tn2
if (queue[j]>queue[k]) LEbB(x;@
break; BOb">6C
SortUtil.swap(queue,j,k); JgKO|VO
k = j; xjuN-
} ?*G|XnM&
} ]_mb7X>
lk^Ol&6
} ~:rl=o}
k$z_:X
} (Y.k8";)`
G\/zkrxmv
SortUtil： Zw 26
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package org.rut.util.algorithm; ~rE|%o
LvH4{B
import org.rut.util.algorithm.support.BubbleSort; =\&;Fi]
import org.rut.util.algorithm.support.HeapSort; #l\=}#\1Wb
import org.rut.util.algorithm.support.ImprovedMergeSort; =t#llgi~
import org.rut.util.algorithm.support.ImprovedQuickSort; ~9a<0Mc?
import org.rut.util.algorithm.support.InsertSort; j\[dx^\=
import org.rut.util.algorithm.support.MergeSort; )0.kv2o.
import org.rut.util.algorithm.support.QuickSort; }>pknc?
import org.rut.util.algorithm.support.SelectionSort; 'Vzp2
import org.rut.util.algorithm.support.ShellSort; EA@.,7F
i^X]j
/** xBThq?N?
* @author treeroot zsEc(
* @since 2006-2-2 9|^2",V
* @version 1.0 >a!/QMh
*/ )#0O>F~
public class SortUtil { >Eyt17_H"n
public final static int INSERT = 1; ^b4 9
public final static int BUBBLE = 2; .LPV#&
public final static int SELECTION = 3; :)-Sk$
public final static int SHELL = 4; 1E[J%Rh\l
public final static int QUICK = 5; ,uSMQS-O'4
public final static int IMPROVED_QUICK = 6; oA7tEu
public final static int MERGE = 7; [`#CXq'
public final static int IMPROVED_MERGE = 8; @wGPqg
public final static int HEAP = 9; SB;&GHq"n
.9/hHCp
public static void sort(int[] data) { R$h<<v)%
sort(data, IMPROVED_QUICK); 7X`g,b!
} 0#7>o^2
private static String[] name={ n*R])=F@c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !P2ro~0/
}; : Xda1S
CmP9Q2
private static Sort[] impl=new Sort[]{ gDQ^)1k
new InsertSort(), G)AqbY
new BubbleSort(), MD}w Y><C
new SelectionSort(), f&NgS+<K$
new ShellSort(), =J]&c?I
new QuickSort(), 9@SC}AF.
new ImprovedQuickSort(), R~TTL
new MergeSort(), bWjc'P6rx
new ImprovedMergeSort(), ]g#:KAqz
new HeapSort() fbyd"(V8r
}; a(m2n.0'>
e[{0)y>=
public static String toString(int algorithm){ fF!Yp iI"
return name[algorithm-1]; h/QXPdV
} qJf?o.Pv
poc`q5i+
public static void sort(int[] data, int algorithm) { q\9JgD)
impl[algorithm-1].sort(data); F#3Q_G^/
} j"8ZM{aO
SpIv#?
public static interface Sort { [$ubNk;!z
public void sort(int[] data); lB8-Z ow
} :tc@2/>!O
BwN0!lsF3
public static void swap(int[] data, int i, int j) { E'f{i:O"~
int temp = data; juP7P[d$qW
data = data[j]; =eq[:K<6
data[j] = temp; :p1u(hflS
} 7zl5yKN
} PF0_8,@U