[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; 5."5IjZu
} U8 Z~Y}29
int i1=l; ' oBo|
int i2=mid+1; l'|E,N>X
for(int cur=l;cur<=r;cur++){ Q{H17]W
if(i1==mid+1) T&?w"T2y
data[cur]=temp[i2++]; $-m@KB
else if(i2>r) 9uuta4&uI
data[cur]=temp[i1++]; i?ZA x4D
else if(temp[i1] data[cur]=temp[i1++]; %l Q[dXp
else J$1j-\KS
data[cur]=temp[i2++]; N YCj; ,V
} 5){tBK|
} TcR=GR*cJ
X7e>Z)l
} +2- qlU
C>AcK#-x,{
改进后的归并排序: Z+Kv+GmqH
K|`+C1!
package org.rut.util.algorithm.support; VMaS;)0f@
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import org.rut.util.algorithm.SortUtil; 6_W<hevI
smQ4CLJ
/** >NJjS8f5
* @author treeroot 7raSf&{&6b
* @since 2006-2-2 YkSuwx@5_q
* @version 1.0 AnRlH
*/ qpoquWZ
public class ImprovedMergeSort implements SortUtil.Sort { - o4@#p>>
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private static final int THRESHOLD = 10; 7 n\mj\
$2Kau 1
/* ~q*i;*
* (non-Javadoc) PoJmW^:}
* -UJ?L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3voW
*/ aD+0\I[x
public void sort(int[] data) { z9^c]U U)E
int[] temp=new int[data.length]; ~D*b3K8X
mergeSort(data,temp,0,data.length-1); <'W=]IAV
} ldK>HxM%Z
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private void mergeSort(int[] data, int[] temp, int l, int r) { FX7M4t#<
int i, j, k; >J.Qm0TY(
int mid = (l + r) / 2; /CH(!\bQ
if (l == r) "<qEXX
return; b9`iZ
if ((mid - l) >= THRESHOLD) Jth=.9mrM
mergeSort(data, temp, l, mid); hBjVe?{
else ooY\t +
insertSort(data, l, mid - l + 1); =PV/`I_h
if ((r - mid) > THRESHOLD) wcwQjHwd
mergeSort(data, temp, mid + 1, r); ~eHRlXL'
else 2@sr:,\1
insertSort(data, mid + 1, r - mid); yE}BfU {.
9WOu8Ia
for (i = l; i <= mid; i++) { :"VujvFX
temp = data; D@#0dDT
} XjxPIdX_H
for (j = 1; j <= r - mid; j++) { uWh|C9Y!A
temp[r - j + 1] = data[j + mid]; )9MrdVNv
} F%Kp9I*
int a = temp[l]; NaF(\j
int b = temp[r]; h!v/s=8c
for (i = l, j = r, k = l; k <= r; k++) { #Gd7M3
if (a < b) { TiQ^}5~M
data[k] = temp[i++]; -/zp&*0gcx
a = temp; ]dq5hkjpU
} else { O"\nR:\
data[k] = temp[j--]; \2j|=S6
b = temp[j]; %Z7%jma
} xkM] J)C
} T(JuL<PB
} $6# lTYN~
Rnr#$C%
/** +ZclGchw
* @param data *!Y-!
* @param l b_|u<
* @param i F;pQ\Y
*/ zFywC-my@
private void insertSort(int[] data, int start, int len) { !9DX=?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jQ?LHUE
} #sZIDn J#
} ]IS;\~
} iX%n0i
} 3 z=\.R
2d8=h6
堆排序： Oc~aW3*A(
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package org.rut.util.algorithm.support; 7}%H2$Do
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import org.rut.util.algorithm.SortUtil; ?mU\ N0o
TF\sP8>V
/** VoM6
* @author treeroot B.*"Xfr8
* @since 2006-2-2 Y@%`ZPJ
* @version 1.0 c+2sT3).D
*/ $P nLG]X
public class HeapSort implements SortUtil.Sort{ #tDW!Xv?
Kam]Mn'
/* (non-Javadoc) =|,A%ZGF$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PS@*qTin
*/ :Q7mV%%
public void sort(int[] data) { `WnQ
MaxHeap h=new MaxHeap(); 'zxoRc-b@N
h.init(data); b\giJ1NJB
for(int i=0;i h.remove(); J +q|$K6
System.arraycopy(h.queue,1,data,0,data.length); 8TPN#"
} >1ZJ{se
6Dst;:
private static class MaxHeap{ ,{KCY[}|
h1f8ktF
void init(int[] data){ !` 26\@1
this.queue=new int[data.length+1]; y@;%Uv&
for(int i=0;i queue[++size]=data; O('Nn]wo~9
fixUp(size); 10O$'`
} p3yU:q#A
} 9$RIH\*
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private int size=0; !h: Q
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private int[] queue; <n^3uXzD
d#>y}H9
public int get() { &z@~B&O
return queue[1]; nIBFk?)6
} >qh?L#Fk
F8=nhn
public void remove() { c!wtf,F
SortUtil.swap(queue,1,size--); cj g.lzYH
fixDown(1); .Dw,"VHP
} ~xDw*AC-
file://fixdown x_!ZycEa
private void fixDown(int k) { CS@&^SEj
int j; &=Y e6 f[
while ((j = k << 1) <= size) { .:9s}%Zr
if (j < size %26amp;%26amp; queue[j] j++; o~1 Kp!U
if (queue[k]>queue[j]) file://不用交换 j@| `f((4
break; Eju~}:Lo
SortUtil.swap(queue,j,k); WG5W0T_
k = j; fdv`7u+}a
} BsLG^f
} W^3;F1
private void fixUp(int k) { 1@_T m
while (k > 1) { #/ "+
int j = k >> 1; ; Lql_1
if (queue[j]>queue[k]) *e/K:k
break; T3pdx~66
SortUtil.swap(queue,j,k); XsL#;a C
k = j; xs!p|
} ~uj;qq
} ln<]-)&C
VKW|kU7Cs$
} }}T,W.#%u
T):SGW
} Uyx&E?SlEq
zp4W'8
SortUtil： '\~^TFi
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package org.rut.util.algorithm; Zyye%Ly
9[Qd)%MO
import org.rut.util.algorithm.support.BubbleSort; O#_b7i
import org.rut.util.algorithm.support.HeapSort; SEd5)0X^
import org.rut.util.algorithm.support.ImprovedMergeSort; Q6'nSBi:A_
import org.rut.util.algorithm.support.ImprovedQuickSort; lA;a
import org.rut.util.algorithm.support.InsertSort; uaw<
import org.rut.util.algorithm.support.MergeSort; @i%YNI5*
import org.rut.util.algorithm.support.QuickSort; $nPAm6mH
import org.rut.util.algorithm.support.SelectionSort; Qe$k3!
import org.rut.util.algorithm.support.ShellSort; %b}gDWs
)=^w3y
/** nII^mg~
* @author treeroot sl|_=oXT
* @since 2006-2-2 B0Xl+JIR#
* @version 1.0 I021p5h|
*/ #A<P6zJXR
public class SortUtil { 0q6I;$H
public final static int INSERT = 1; @pza>^wk
public final static int BUBBLE = 2; JPx7EEkZR4
public final static int SELECTION = 3; ;#k-)m%
public final static int SHELL = 4; q/gB<p9
public final static int QUICK = 5; G/?~\ }:s
public final static int IMPROVED_QUICK = 6; ?mYYt]R
public final static int MERGE = 7; K :LL_,
public final static int IMPROVED_MERGE = 8; J5yidymrpW
public final static int HEAP = 9; E4[}lX}
}!d;(/)rb
public static void sort(int[] data) { *}!MOqP
sort(data, IMPROVED_QUICK); '0t-]NAc
} [aqu}Su
private static String[] name={ ,/,9j{|"j
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :Vuf6,
}; & >JDPB?5
b~0N^p[&%
private static Sort[] impl=new Sort[]{ r)T[(D'Tm-
new InsertSort(), zO=%J)-=
new BubbleSort(), 'vIx#k4D1
new SelectionSort(), `a]44es9q
new ShellSort(), }5 9U}@xC
new QuickSort(), , c;eN
new ImprovedQuickSort(), \nvAa_,
new MergeSort(), {]}s#vvy
new ImprovedMergeSort(), @QEqB_W
new HeapSort() 0pgY1i7
}; 0b|zk <
>G"X J<IO
public static String toString(int algorithm){ Y}STF
return name[algorithm-1]; cO#oH2}
} *r,b=8|
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public static void sort(int[] data, int algorithm) { 8cxai8
impl[algorithm-1].sort(data); >cR)?P/o
} 3OqX/z,
XvGA|Ekf<
public static interface Sort { ]!{y a8
public void sort(int[] data); K k[`dR;
} @y|_d
-X1X)0v$
public static void swap(int[] data, int i, int j) { n!ok?=(kQ
int temp = data; SZ!=`a]
data = data[j]; [`_io>*g
data[j] = temp; cma*Dc
} -$a>f4]
} 0@=MOGQb