[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; ENqZ=Lyq
} V-(]L:[JQ
int i1=l; Z>g&%3j
int i2=mid+1; iTdamu`L
for(int cur=l;cur<=r;cur++){ kw z6SObQ
if(i1==mid+1) `,~'T [
data[cur]=temp[i2++]; \(Nx)F
else if(i2>r) j<!dpt
data[cur]=temp[i1++]; aTm R~k
else if(temp[i1] data[cur]=temp[i1++]; z0\ $#r^I
else tQNc+>7k+u
data[cur]=temp[i2++]; $2*_7_Qb
} O95gdxc
} aKW-(5<JW
:D3:`P>,c
} k*2khh-
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改进后的归并排序: -32P}58R
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package org.rut.util.algorithm.support; `"ks0@^U
%k?/pRv$>
import org.rut.util.algorithm.SortUtil; AfO.D?4x
T.z efoZ
/** NL|c5y<r
* @author treeroot 7P2(q
* @since 2006-2-2 p9G+la~;VM
* @version 1.0 3 []ltN_
*/ Yg5o!A
public class ImprovedMergeSort implements SortUtil.Sort { o`QH8
I*f@^(
private static final int THRESHOLD = 10; ))dqC l
'$p`3Oqi
/* 56kqG}mg&
* (non-Javadoc) iu<Tv,{8
* m#[c]v{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LrO[l0#'Q
*/ 8q]"CFpa
public void sort(int[] data) { +<@1)qZ(E
int[] temp=new int[data.length]; O\cc=7
mergeSort(data,temp,0,data.length-1); `2+TN
} C[Q4OAFG
@6~m&$R/
private void mergeSort(int[] data, int[] temp, int l, int r) { k t!@}QP
int i, j, k; bYQ@!
int mid = (l + r) / 2; X)j%v\#`U
if (l == r) )O*h79t^Q
return; y[Dgyt
if ((mid - l) >= THRESHOLD) s=:LS
mergeSort(data, temp, l, mid); OB=bRLd.IR
else pheu48/f
insertSort(data, l, mid - l + 1); 1Ci^e7|?
if ((r - mid) > THRESHOLD) ]QY-LO(
mergeSort(data, temp, mid + 1, r); 6||%T$_;}
else C[TjcHoA
insertSort(data, mid + 1, r - mid); c^H#[<6p
"* FjEA6=
for (i = l; i <= mid; i++) { ,H?e23G
temp = data; a 01s'9Be
} 89 m.,
for (j = 1; j <= r - mid; j++) { Z3wdk6%:}
temp[r - j + 1] = data[j + mid]; ^FNju/b
} 5G2ueRVb
int a = temp[l]; < <0[PJ
int b = temp[r]; >\'}&oi
for (i = l, j = r, k = l; k <= r; k++) { {%('|(57
if (a < b) { 8f~*T
data[k] = temp[i++]; !W&|kvT^
a = temp; U74L:&yLI
} else { 9_svtO]P
data[k] = temp[j--]; KU/QEeqbrp
b = temp[j]; J<"Z6 '0v
} &a\w+
} &'/PEOu&}G
} rcLF:gd]E
t vW0 W
/** \jZmu
* @param data p[|V7K'Z
* @param l >#S}J LZ
* @param i d5 ]-{+V+
*/ &l`_D?{<#
private void insertSort(int[] data, int start, int len) { :ba4E[@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); AGwdM-$iT
} 2XUIC^<@s
} lxD~l#)^ln
} _E0yzkS
} 2C"i2/NH'
c?c"|.-<p
堆排序： x)%"i)
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package org.rut.util.algorithm.support; &Nr+-$
1p/_U?H:|
import org.rut.util.algorithm.SortUtil; d"3x11|
{=!BzNMj
/** ^^uY)AL
* @author treeroot 6P(jc
* @since 2006-2-2 ) .V,zmI
* @version 1.0 X?r$o>db
*/ e&(Wn2)o
public class HeapSort implements SortUtil.Sort{ KF#qz2S
if1)AE-
/* (non-Javadoc) .hf%L1N%F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 06pY10<>X
*/ nC$c.K'
public void sort(int[] data) { =(c.8d
MaxHeap h=new MaxHeap(); D&N3LH
h.init(data); vgNrHq&2q
for(int i=0;i h.remove(); h^WMv *2
System.arraycopy(h.queue,1,data,0,data.length); C^]UK
} PK{FQ3b2{
)P+<=8@a
private static class MaxHeap{ #MMp0
1!+0]_8K
void init(int[] data){ O#8lJ%?
this.queue=new int[data.length+1]; X,8Zn06M
for(int i=0;i queue[++size]=data; WwKpZ67$R
fixUp(size); 1]8Hpd
} b'/:e#F
} JAwEu79sh
`i~J0#P
private int size=0; fgo3Gy*#
xo-}t5w6t
private int[] queue; "6%qi qt
=zp{ ^mC
public int get() { |`I9K#w3
return queue[1]; :Xx7':5
} `B3YP1
o/RGzPR
public void remove() { ^#w9!I{4.
SortUtil.swap(queue,1,size--); JV2[jo}0N
fixDown(1); PI*Z>VE?
} s9u7zqCF
file://fixdown (r<F@)J
private void fixDown(int k) { & )-fC
int j; C}o^p"M*B3
while ((j = k << 1) <= size) { b!EqYT
if (j < size %26amp;%26amp; queue[j] j++; +&1#ob"6lq
if (queue[k]>queue[j]) file://不用交换 -)ri,v{:c
break; ']X0g{%
SortUtil.swap(queue,j,k); m[N&UM#
k = j; q.ppYXJUXi
} \w$e|[~
} !83 N#Y_Mz
private void fixUp(int k) { UrS%t>6k
while (k > 1) { WL\*g] K4
int j = k >> 1; ej(w{vl
if (queue[j]>queue[k]) vL;=qkTCQ
break; z3fU|*_c
SortUtil.swap(queue,j,k); ?U*sH2F
k = j; ufA0H J)Yg
} 7Z81+I|&8
} G1,u{d-_
|;C;d"JC2
} 4J[csU
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} Qeq=4Nq
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SortUtil： FlH=Pqc
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package org.rut.util.algorithm; p|)j{nc
gF~ }
import org.rut.util.algorithm.support.BubbleSort; 0}Qd
import org.rut.util.algorithm.support.HeapSort; fAT M?
import org.rut.util.algorithm.support.ImprovedMergeSort; _oU~S$hO
import org.rut.util.algorithm.support.ImprovedQuickSort; t..@69
import org.rut.util.algorithm.support.InsertSort; HhTD/
import org.rut.util.algorithm.support.MergeSort; @Y6~;(p
import org.rut.util.algorithm.support.QuickSort; 'sjks sy.3
import org.rut.util.algorithm.support.SelectionSort; aSSw>*?Q
import org.rut.util.algorithm.support.ShellSort; Q(hAV
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/** #W L>ha v
* @author treeroot `~qVo4V6Z
* @since 2006-2-2 Q>/[*(.Wd
* @version 1.0 %BkPkQA
*/ C9`x"$
public class SortUtil { s:sk`~2<gd
public final static int INSERT = 1; =XUt?5
public final static int BUBBLE = 2; )x&>Cf<,
public final static int SELECTION = 3; YtT:\#D
public final static int SHELL = 4; S'q4va"
public final static int QUICK = 5; 04#r'UIF
public final static int IMPROVED_QUICK = 6; +]#pm9
public final static int MERGE = 7; e]l.m!,r
public final static int IMPROVED_MERGE = 8; (ZK(ODn)i
public final static int HEAP = 9; g6q67m<h
`H|#l\
public static void sort(int[] data) { [PU0!W;
sort(data, IMPROVED_QUICK); !~f!O"n)3r
} #_fL[j&
private static String[] name={ ?OWJUmQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" TSP#.QY
}; |?uUw$oh
X>rv{@KbL
private static Sort[] impl=new Sort[]{ K1fnHpK
new InsertSort(), -Wl79lE
new BubbleSort(), KrD?Z2x
new SelectionSort(), (wEaw|Zx
new ShellSort(), G~\=:d=^,`
new QuickSort(), (fnp\j3w
new ImprovedQuickSort(), f.u+({"ql
new MergeSort(), ^Hv4t
new ImprovedMergeSort(), m[?gN&%nc
new HeapSort() Vg? 1&8>
}; f!##R-A
8>V)SAI'
public static String toString(int algorithm){ ^$F1U,oi
return name[algorithm-1]; %3$EV}dp
} #j${R={
Z;GZ?NOlY
public static void sort(int[] data, int algorithm) { F%q}N,W
impl[algorithm-1].sort(data); *Q2}Qbu
} Ceak8#|4
|jyoT%SQ
public static interface Sort { =(>pv,
public void sort(int[] data); p3{ 3[fDx
} Q.L.B7'e7
z] teQaUZ
public static void swap(int[] data, int i, int j) { R9lb<`
int temp = data; Z\*jt B:
data = data[j]; c{K[bppJ*
data[j] = temp; $<s 3;>t
} %C(^v)"
} si3@R?WR6*