[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; /> 4"~q)
} p<:!)kt
int i1=l; ;j2vHU#q-
int i2=mid+1; 'fPdpnJ<
for(int cur=l;cur<=r;cur++){ M`S0u~#tI
if(i1==mid+1) MTUn3;c/
data[cur]=temp[i2++]; \(%Y%?dy
else if(i2>r) 2<}NB?f`N
data[cur]=temp[i1++]; )aX,%yK
else if(temp[i1] data[cur]=temp[i1++]; "le>_Ze_>|
else 9Vf1Xz
data[cur]=temp[i2++]; cp o-.
} A2|Ud_
} 2=_gf
i E CrI3s
} <vwkjCA`
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改进后的归并排序: (64yg
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package org.rut.util.algorithm.support; 'e6WDC1Am(
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import org.rut.util.algorithm.SortUtil; Q~T$N
l<N}!lG|
/** 4rrSb*
* @author treeroot 0tU.(
* @since 2006-2-2 \<g*8?yFs
* @version 1.0 []D@Q+1
*/ 9:M` j
public class ImprovedMergeSort implements SortUtil.Sort { Q1+dCCY#F
7nuU^wc
private static final int THRESHOLD = 10; AF%@VLf
Qubp9C#r
/* w4gg@aO
* (non-Javadoc) C9t4#"
* Hhh0T>gi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uS^Ipxe\
*/ /3{b%0Aa
public void sort(int[] data) { Gn&4V}F
int[] temp=new int[data.length]; mWvl38
mergeSort(data,temp,0,data.length-1); B $mX3B+a
} F|!){=
\P6$mh\T
private void mergeSort(int[] data, int[] temp, int l, int r) { ?5{>;#0Z
int i, j, k; @/31IOIV]`
int mid = (l + r) / 2; aca=yDs2
if (l == r) 4H/fP]u
return; gdQvp=v]
if ((mid - l) >= THRESHOLD) UNBH
mergeSort(data, temp, l, mid); ojri~erJE?
else ,U}8(D~:
insertSort(data, l, mid - l + 1); ~WSC6Bh@9
if ((r - mid) > THRESHOLD) al/~
mergeSort(data, temp, mid + 1, r); szHUHW~;J
else x& S>Mr
insertSort(data, mid + 1, r - mid); jk@]d5
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for (i = l; i <= mid; i++) { dq2v[?*R
temp = data; e]QkZg2?Yn
} aH_&=/-Tz
for (j = 1; j <= r - mid; j++) { ?jbam!A
temp[r - j + 1] = data[j + mid]; F+GQl
} C;` fOCz^
int a = temp[l]; )8;'fE[p}
int b = temp[r]; N@}U;x}
for (i = l, j = r, k = l; k <= r; k++) { @,]v'l!u
if (a < b) { j^gF~Wz^
data[k] = temp[i++]; ; OsN^
a = temp; LPC7Bdjz
} else { u8*0r{kOH
data[k] = temp[j--]; =LRUasF
b = temp[j]; zv41Yv!x}
} vd~O:=)4
} IX}l)t[:(
} deNU[
rTH@PDk>)
/** x;+,lP
* @param data f5N~K>
* @param l m5S/T\,X
* @param i 3]'3{@{}H
*/ |l9AgwDg
private void insertSort(int[] data, int start, int len) { =xgW$c/yB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {1o=/&
} IAfYlS#<yD
} @:Ns`+ W*
} JOMZ&c^
} _Qv4;a
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堆排序： *q^'%'
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package org.rut.util.algorithm.support; vjHbg#0%
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import org.rut.util.algorithm.SortUtil; M?,;TJ7Gd
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/** (nBsf1l
* @author treeroot eA!aUu
* @since 2006-2-2 (k[<>$hL*
* @version 1.0 cJt#8P
*/ U9JqZ!
public class HeapSort implements SortUtil.Sort{ pRC#DHcHh
LE7o[<>
/* (non-Javadoc) lU\|F5O@#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a(m#GES
*/ I} j! !
public void sort(int[] data) { 4-m}W;igu
MaxHeap h=new MaxHeap(); lY6U$*9c
h.init(data); UPbG_ #"wZ
for(int i=0;i h.remove(); )&*&ZL0
System.arraycopy(h.queue,1,data,0,data.length); V482V#BP
} aUd633
l!`m}$
private static class MaxHeap{ @.%ll n
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void init(int[] data){ U7{, *
this.queue=new int[data.length+1]; /ZAEvdO*P
for(int i=0;i queue[++size]=data; #KiRH* giU
fixUp(size); b6#V0bDXHD
} `AYHCn
} 9D&ocV3QV
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private int size=0; (Y-7B
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private int[] queue; :g][99
(;!&RZ
public int get() { T@X!vCjf6
return queue[1]; H=B8'N
} ).xQ~A\.
<x,$ODso
public void remove() { 1;SWfKU?.
SortUtil.swap(queue,1,size--); !)ee{CwNc
fixDown(1); e5MX5 T^
} >i=mw5`D]
file://fixdown )bqO}_B
private void fixDown(int k) { xaejG/'iK
int j; z~Gi/Ln
while ((j = k << 1) <= size) { ,LG6py&aT
if (j < size %26amp;%26amp; queue[j] j++; K o,O!T.
if (queue[k]>queue[j]) file://不用交换 IEHAPt'
break; k|1/gd5
SortUtil.swap(queue,j,k); *V5R[
k = j; q0$}MB6
} wQDKv'zU1
} s-Bpd#G>/
private void fixUp(int k) { |R DPx6!V
while (k > 1) { ;ZB[g78%R%
int j = k >> 1; 2B5Z0<
if (queue[j]>queue[k]) =fEn h'KE
break; Kh}#At^C8e
SortUtil.swap(queue,j,k); ~gmj/PQ0
k = j; a//<S?d$:
} j$siCsF
} dFK/
?(4=:o
} Fep#Pw1
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} z\{y[3-
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SortUtil： pq*W;6(-
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package org.rut.util.algorithm; V`m'r+ Y
".Luc7
import org.rut.util.algorithm.support.BubbleSort; { owK~
import org.rut.util.algorithm.support.HeapSort; s,)Z8H
import org.rut.util.algorithm.support.ImprovedMergeSort; qlNK }
import org.rut.util.algorithm.support.ImprovedQuickSort; xp.~i*!`
import org.rut.util.algorithm.support.InsertSort; k|'{$/n
import org.rut.util.algorithm.support.MergeSort; 6=0"3%jn@
import org.rut.util.algorithm.support.QuickSort; <!EdND=
import org.rut.util.algorithm.support.SelectionSort; _?]bd-E
import org.rut.util.algorithm.support.ShellSort; j|c
Ko|nF-r_
/** Bq3"l%hI
* @author treeroot O4dJ> O
* @since 2006-2-2 _o`+c wc
* @version 1.0 SvLI%>B=9
*/ #?DwOUw
public class SortUtil { 2+m%f"
public final static int INSERT = 1; $aDAD4mmm
public final static int BUBBLE = 2; L3/m}AH,
public final static int SELECTION = 3; dZK/v
public final static int SHELL = 4; ?S9? ?y/
public final static int QUICK = 5; wc`UcGO
public final static int IMPROVED_QUICK = 6; eg!s[1[_
public final static int MERGE = 7; ?Dm={S6
public final static int IMPROVED_MERGE = 8; P|*c7+q
public final static int HEAP = 9; 7uQiP&v
uj;tmK>;
public static void sort(int[] data) { ^h\& l{e
sort(data, IMPROVED_QUICK); d5jZ?
} =z#6mSx|W
private static String[] name={ &y_Ya%Z3*e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /6",#B}%b
}; >%LZ|*U
@ >_v/U'
private static Sort[] impl=new Sort[]{ !1(*D*31
new InsertSort(), a8nqzuI
new BubbleSort(), j.or:nF
new SelectionSort(), v_^>*Vm*
new ShellSort(), ~j3O0s<gK
new QuickSort(), uIh68UM
new ImprovedQuickSort(), ,Y9bXC8+dU
new MergeSort(), mk.1jx?l
new ImprovedMergeSort(), orBB5JJ
new HeapSort() FJ-X~^
}; TP3KT)
F^4mO|
public static String toString(int algorithm){ gi {rqM
return name[algorithm-1]; 1?I_fA}
} 0MpZdJ
*{y({J
public static void sort(int[] data, int algorithm) { O1+OE!w
impl[algorithm-1].sort(data); N$ oQK(
} !%X~`&9
eYtP396C|
public static interface Sort { ^5E:hW[*
public void sort(int[] data); l(A)Gd5>
} KpX1GrIn3
pYN.tD FO
public static void swap(int[] data, int i, int j) { *RYok{w
int temp = data; VEsIhjQ
data = data[j]; c,j[ix
data[j] = temp; m+|yk.md
} PPAcEXsIu
} <#nt?Xn