[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; `':$PUz,g
} s]0x^"#B
int i1=l; 0mL#8\'"
int i2=mid+1; }Tn]cL{]C
for(int cur=l;cur<=r;cur++){ "2(4?P
if(i1==mid+1) {U4BPKof
data[cur]=temp[i2++]; %"@KuqV
else if(i2>r) N. 3 x[%:
data[cur]=temp[i1++]; DGdSu6s$
else if(temp[i1] data[cur]=temp[i1++]; xtN%v0ZZ
else lKEdpF<
data[cur]=temp[i2++]; 3.B|uN
} `p9h$d
} OUn,URI
GEy^*, d
} X:+;d8rCy
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改进后的归并排序: #)_4$<P*'
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package org.rut.util.algorithm.support; ;id0|x
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import org.rut.util.algorithm.SortUtil; ZeF PwW
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/** sCSrwsbhv
* @author treeroot SfQ,uD6
* @since 2006-2-2 $d%m%SZxv
* @version 1.0 #/!a=0
*/ '>_'gR0O
public class ImprovedMergeSort implements SortUtil.Sort { W1M<6T.{7
CHv~H.kh'
private static final int THRESHOLD = 10; XJDp%B
*^ncb,1+i
/* rgdDkWLXC
* (non-Javadoc) phwk0J]2
* |/[?]`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5`*S'W}\>
*/ 2ksX6M3kY
public void sort(int[] data) { i[H`u,%+(
int[] temp=new int[data.length]; ,95Nj h
mergeSort(data,temp,0,data.length-1); ,ClGa2O
} ZJ'#XZpr
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private void mergeSort(int[] data, int[] temp, int l, int r) { l_FttN
int i, j, k; /=A^@&:_#
int mid = (l + r) / 2; +rfw)c'
if (l == r) 'J#u;KJ
return; J,%v`A~N
if ((mid - l) >= THRESHOLD) %fnL
mergeSort(data, temp, l, mid); u.x>::i&
else .&=nP?ZPC6
insertSort(data, l, mid - l + 1); <5rp$AzT
if ((r - mid) > THRESHOLD) lX/s Q
mergeSort(data, temp, mid + 1, r); xCz(qR
else 9'faH
insertSort(data, mid + 1, r - mid); vzM8U>M
[U.3rcT"N
for (i = l; i <= mid; i++) { t J N;WK.6
temp = data; 4UT%z}[!
} cm@q{(r
for (j = 1; j <= r - mid; j++) { x;dyF_*;
temp[r - j + 1] = data[j + mid]; IWERn v!
} '`&gSL.1a@
int a = temp[l]; 0eUK'
int b = temp[r]; G?)NDRM
for (i = l, j = r, k = l; k <= r; k++) { $!%/Kk4M
if (a < b) { yaza
data[k] = temp[i++]; 6^y*A!xY
a = temp; uOUgU$%zqH
} else { w$8Su:g=
data[k] = temp[j--]; :6~Nq/hZB
b = temp[j]; e=&,jg?K
} E j`
} :_V9Jwu
} 4v9jGwnzt
kKL'rT6z
/** X)^eaw]Q0
* @param data ea[vzD]
* @param l 7.mY@
* @param i Ro3C(aRx
*/ F3+ ;2GG2
private void insertSort(int[] data, int start, int len) { dZ}gf}.v
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nX%b@cOXj
} U|SF;T .
} p_%dH
} VZuluV
} Nc;cb
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堆排序： *g7BR`Bt]z
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package org.rut.util.algorithm.support; &?X0;,5)
ov;1=M~RF
import org.rut.util.algorithm.SortUtil; "[h9hoN
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/** ;IyA"C(i
* @author treeroot ]M3V]m
* @since 2006-2-2 iWu
* @version 1.0 c_"=G#^9@i
*/ F(h jP
public class HeapSort implements SortUtil.Sort{ w{F{7X$^
\jA#RF.W
/* (non-Javadoc) zm>^!j !
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IQZ/8UwB
*/ hK]mnA[Y
public void sort(int[] data) { /3Y\s&y
MaxHeap h=new MaxHeap(); YMSZcI
h.init(data); i?{)o]i
for(int i=0;i h.remove(); B^;"<2b*
System.arraycopy(h.queue,1,data,0,data.length); wWkMvs
} KC+jHk
L2\<iJA}c
private static class MaxHeap{ '[WVP=M<XV
<n1panS
void init(int[] data){ Q DVk7ks
this.queue=new int[data.length+1]; j+"w2
for(int i=0;i queue[++size]=data; 52,[dP,g
fixUp(size); Wn%b}{9Fb
} UaCfXTG
} Q{[l1:
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private int size=0; /7N&4FrG
?lca#@f(
private int[] queue; -DuI 6K
P,J+'.@
public int get() { kqkTz_r|H
return queue[1]; d/Sw.=vq
} +'|nsIx,
b#nI#!p'
public void remove() { <k?pnBI_
SortUtil.swap(queue,1,size--); oGRd ;hsF
fixDown(1); F|a'^:Qs
} (kTu6t*
file://fixdown `r'$l<(4WV
private void fixDown(int k) { r;^%D(
int j; h+R26lI1x
while ((j = k << 1) <= size) { eo*l^7
if (j < size %26amp;%26amp; queue[j] j++; ZsNZ3;d@u(
if (queue[k]>queue[j]) file://不用交换 ds2%i
break; q|{z9V<
SortUtil.swap(queue,j,k); Zg%tN#6y
k = j; GT7&>}FJ)
} ck< `kJ`b
} esiU._:u
private void fixUp(int k) { < 1%}8t"
while (k > 1) { 7gcR/HNeF
int j = k >> 1; ;f~fGsH}e'
if (queue[j]>queue[k]) fGd1
break; ypgM&"eR
SortUtil.swap(queue,j,k); -2[#1S*
k = j; ur.krsU
} -{}h6r
} bg!(B<!X
"O'c.v?{x
} @j!(at4B
$q*a}d[Q
} A=0{}B#
;\v&4+3S
SortUtil： HC=ZcK'W
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package org.rut.util.algorithm; @ta:9wZ
,]@K,|pC)
import org.rut.util.algorithm.support.BubbleSort; DS;\24>H
import org.rut.util.algorithm.support.HeapSort; 0hhxTOp
import org.rut.util.algorithm.support.ImprovedMergeSort; Zs]n0iwM'@
import org.rut.util.algorithm.support.ImprovedQuickSort; n"`V| UTHP
import org.rut.util.algorithm.support.InsertSort; z#Fel/L`O
import org.rut.util.algorithm.support.MergeSort; gs3c1Qa3b
import org.rut.util.algorithm.support.QuickSort; ZH|q#<{l
import org.rut.util.algorithm.support.SelectionSort; EjFn\|VK
import org.rut.util.algorithm.support.ShellSort; c9G%;U)
S]ayH$w\Q
/** t=X=",)f
* @author treeroot ]tXIe?>9
* @since 2006-2-2 R:+'"dBge
* @version 1.0 X4]miUmh
*/ er5!ne
public class SortUtil { %.hJDX\j
public final static int INSERT = 1; 5'NNwc\
public final static int BUBBLE = 2; KJV8y"^=Q
public final static int SELECTION = 3; 5+11J[~{
public final static int SHELL = 4; `kJ)E;v;3
public final static int QUICK = 5; P JATRJ1.
public final static int IMPROVED_QUICK = 6; Q 8Hl7__^
public final static int MERGE = 7; A yr,
public final static int IMPROVED_MERGE = 8; M 9-Q
public final static int HEAP = 9; &9^4-5]
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public static void sort(int[] data) { /='0W3+o*L
sort(data, IMPROVED_QUICK); zt: !hM/Vt
} xhbN=L
private static String[] name={ v@|<.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hcj]T?
}; NuPlrCy;
qF4tjza;k
private static Sort[] impl=new Sort[]{ cz,QP'g
new InsertSort(), ,|d9lK`"P
new BubbleSort(), 4VZI]3K,
new SelectionSort(), ;YR/7
new ShellSort(), 4/|x^Ky>G
new QuickSort(), Dc@O Mr
new ImprovedQuickSort(), gy%.+!4>v`
new MergeSort(), u&#>)h
new ImprovedMergeSort(), jQ;/=9
new HeapSort() &muBSQ-
}; `v!. ,Yr
(ne[a2%>
public static String toString(int algorithm){ w.w{L=p:<"
return name[algorithm-1]; 7H)$NG<U$
} S?d<P
TdgK.g 4
public static void sort(int[] data, int algorithm) { UP^8Yhdo
impl[algorithm-1].sort(data); TL2E|@k1]
} jcJ 4?
8j;Un]
public static interface Sort { @KK6JyOTQ
public void sort(int[] data); -DdHl8
} .p! DVQ"a
O3@DU#N&s
public static void swap(int[] data, int i, int j) { EjLq&QR.
int temp = data; [(@K;6o
data = data[j]; It[51NMal
data[j] = temp; /IWAU)A0
} i"}z9Ae~.
} 7.<jdp