[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; @ \!KF*v
} r> Fec
int i1=l; Xy[}Gp
int i2=mid+1; Z -pyFK\
for(int cur=l;cur<=r;cur++){ Qe2m8
if(i1==mid+1) !(B_EM
data[cur]=temp[i2++]; 536^PcJlN
else if(i2>r) P7}t lHX
data[cur]=temp[i1++]; lP}o[Rd
else if(temp[i1] data[cur]=temp[i1++]; :0nK`$'
else pt=7~+r
data[cur]=temp[i2++]; ^Lsc`<xC
} ~J%R-{U9
} a;56k
C@ FxB[
} x HY+q;
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改进后的归并排序: D35m5+=I
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package org.rut.util.algorithm.support; .KFA218h*x
?O!]8k`1$
import org.rut.util.algorithm.SortUtil; $TR=3[j
:L]-'\y
/** /pO{2[
* @author treeroot :0B |<~lX
* @since 2006-2-2 40 A&#u9o
* @version 1.0 UE"7
*/ {VBR/M(q
public class ImprovedMergeSort implements SortUtil.Sort { +*n]tlk
USE [N
private static final int THRESHOLD = 10; ah 4kA LO
HpW"lYW4
/* T48BRVX-F
* (non-Javadoc) 9Kc0&?q@D
* 1W*V2`0>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h{\t*U54'
*/ D`V6&_.p
public void sort(int[] data) { Po!oN~r
int[] temp=new int[data.length]; =nLO?qoe
mergeSort(data,temp,0,data.length-1); \.5F](:
} .H ,pO#{;
GNs#oM
private void mergeSort(int[] data, int[] temp, int l, int r) { dI!8S
int i, j, k; w"q-#,37j
int mid = (l + r) / 2; +IvNyj|
if (l == r) 6@&fvf
return; n.@#rBKZ
if ((mid - l) >= THRESHOLD) aZP2R"
mergeSort(data, temp, l, mid); kl| g
else 3*G5F}7%=
insertSort(data, l, mid - l + 1); jz|VF,l
if ((r - mid) > THRESHOLD) Cm^Ylp
mergeSort(data, temp, mid + 1, r); HB%K|&!+
else 7@JjjV
insertSort(data, mid + 1, r - mid); _jW>dU^B
aXC!t
for (i = l; i <= mid; i++) { yGRR8F5>(
temp = data; M/*Bh,M`
} *K`x;r
for (j = 1; j <= r - mid; j++) { (m6EQoW^s+
temp[r - j + 1] = data[j + mid]; ^#2xQ5h
} 3be6p
int a = temp[l]; RZ*<n$#6
int b = temp[r]; #?_#!T|
for (i = l, j = r, k = l; k <= r; k++) { nQ|GqU\oA
if (a < b) { $Tfm/=e
data[k] = temp[i++]; )W#T2Z>N1
a = temp; 18jJzYawh
} else { S,XKW(5
data[k] = temp[j--]; z23#G>I&
b = temp[j]; OH>r[,z0
} l/[pEUYU
} nkTYWw
} )u<eO FI+
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/** vlvvi()
* @param data {yTpRQN~
* @param l ]{<saAmJC
* @param i :Pc(DfkS
*/ Vu=] O/ =P
private void insertSort(int[] data, int start, int len) { P`tyBe#=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UAdz-)$
} |4Qx=x>
} p:Oz<P
} -'j7SOGk
} eap8*ONl
(nq^\ZdF
堆排序： _p0)vT
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package org.rut.util.algorithm.support; ?HV}mS[t
t-x[:i
import org.rut.util.algorithm.SortUtil; zOL;"/R
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/** ;>8kPG
* @author treeroot 7 I@";d8~
* @since 2006-2-2 rmsQt
* @version 1.0 Oo1ecbY
*/ (#If1[L
public class HeapSort implements SortUtil.Sort{ UoHd-
oXdel Ju?
/* (non-Javadoc) =MxpH+spI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j|mv+O
*/ Z&-tMai;
public void sort(int[] data) { 1\y@E
MaxHeap h=new MaxHeap(); Je 31".
h.init(data); Od-Ax+Hp
for(int i=0;i h.remove(); WtVf wC_
System.arraycopy(h.queue,1,data,0,data.length); fgmSgG"b
} M1EOnq4-
#~S>K3(
private static class MaxHeap{ Q,~x#
68p R:
void init(int[] data){ F_v-}bbcFQ
this.queue=new int[data.length+1]; T{tn.sT
for(int i=0;i queue[++size]=data; *,&S',S-
fixUp(size); 9n"V\e_R
} Kr]z]4.d@
} x}|+sS,g
I>aGp|4
private int size=0; +j.qZ8
.;g}%C
private int[] queue; Lc%xc`n8B
e^8BV;+c
public int get() { y6FKg)
return queue[1]; )b9_C O}
} r8,om^N6
@D]lgq[
public void remove() { yPN+W8}f
SortUtil.swap(queue,1,size--); "Vy WT
fixDown(1); Mb.4J2F?
} H{%H^t>
file://fixdown T pD;
private void fixDown(int k) { *{|$FQnR>(
int j; $ser+Jt=
while ((j = k << 1) <= size) { ceG&,a$\
if (j < size %26amp;%26amp; queue[j] j++; A?r^V2+j
if (queue[k]>queue[j]) file://不用交换 *gDl~qNRoS
break; NH4?q!'G
SortUtil.swap(queue,j,k); SO_>c+Dw
k = j; qe%V#c
} #Kl}= 1 4
} [,b)YjO~Xd
private void fixUp(int k) { QZ~0o7
while (k > 1) { ;{gT=,KQ`
int j = k >> 1; O1'K>teF%
if (queue[j]>queue[k]) +`Pmq}ey
break; W-m"@<Z
SortUtil.swap(queue,j,k); E30Z`$cz:
k = j; iD714+N(
} #ouE r-=
} B`1kGEx .
?-,6<K1
} j^nu|
\c%g M1
} `[Sl1saZ$S
$@.jZ_G
SortUtil： i?-Y
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package org.rut.util.algorithm; H%z/v|e6
PJK9704 6
import org.rut.util.algorithm.support.BubbleSort; ;MPKJS68@
import org.rut.util.algorithm.support.HeapSort; 9go))&`PJL
import org.rut.util.algorithm.support.ImprovedMergeSort; T?rH ,$:
import org.rut.util.algorithm.support.ImprovedQuickSort; > c:Zx!
import org.rut.util.algorithm.support.InsertSort; #c:kCZt#
import org.rut.util.algorithm.support.MergeSort; m#n]Wgp'
import org.rut.util.algorithm.support.QuickSort; 8wmQ4){
import org.rut.util.algorithm.support.SelectionSort; bLlH//ZRH
import org.rut.util.algorithm.support.ShellSort; (NaK3_
"V}qf3qU
/** SiTeB)/
* @author treeroot M1{(OY(G
* @since 2006-2-2 s[X B#)H4
* @version 1.0 x.UaQ |F
*/ #xp(B5
public class SortUtil { m9t$h
public final static int INSERT = 1; g "*;nHI D
public final static int BUBBLE = 2; H=<LutnZ
public final static int SELECTION = 3; YPEnNt+
public final static int SHELL = 4; mNDuwDd$S
public final static int QUICK = 5; hB>^'6h+
public final static int IMPROVED_QUICK = 6; T1zi0fa'
public final static int MERGE = 7; ="(>>C1-
public final static int IMPROVED_MERGE = 8; MGaiTN^_<
public final static int HEAP = 9; +zp0" ,2B
.iT4-
public static void sort(int[] data) { &S-er{]]
sort(data, IMPROVED_QUICK); ;4kT?3$l
} g~)3WfC$[
private static String[] name={ NwpS)6<-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1EsqQz*$u
}; ^l(^z fsZ
^P$7A]!
private static Sort[] impl=new Sort[]{ HeozJ^u\?
new InsertSort(), r?3Aqi"
new BubbleSort(), Yqj+hC6>,
new SelectionSort(), B9#;-QO
new ShellSort(), ,g|2NjUAc
new QuickSort(), i}lRIXjdV
new ImprovedQuickSort(), >];"N{ A
new MergeSort(), S>t>6&A
new ImprovedMergeSort(), kEP<[K
new HeapSort() niWx^gKb$
}; Pm?B 9S
#>[wD#XJV
public static String toString(int algorithm){ A3q*$.[
return name[algorithm-1]; ch })ivFP[
} >nM%p4E
-nR\,+N
public static void sort(int[] data, int algorithm) { 28UVDG1?
impl[algorithm-1].sort(data); A*i_|]Q
} sE9Ckc5
*eGM7o*\X
public static interface Sort { zP nC=h|g
public void sort(int[] data); h(N=V|0
} %5Rq1$D
GOVAb'
public static void swap(int[] data, int i, int j) { ti9}*8
int temp = data; XU9'Rfp
data = data[j]; &t3Jv{
data[j] = temp; w2zp#;d
} fj+O'X
} <|H?gfM