[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; GRcPzneiz
} &N^j }^ Z
int i1=l; 2>o[
int i2=mid+1; Tz1^"tx9
for(int cur=l;cur<=r;cur++){ v]k-xn|$j
if(i1==mid+1) 3RaduN]
data[cur]=temp[i2++]; ,ua1sTgQ
else if(i2>r) hU$aZ
data[cur]=temp[i1++]; O,r;-t4vYU
else if(temp[i1] data[cur]=temp[i1++]; D40 vCax^J
else gH//@`6
data[cur]=temp[i2++]; 81Z;hO"~
} R,3cJ Y_%
} t\,Y<9{w
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改进后的归并排序: # 55>?
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package org.rut.util.algorithm.support; >eTbg"\
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import org.rut.util.algorithm.SortUtil; IAO5li3
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/** AlQhKL}|s
* @author treeroot fOi Rstci
* @since 2006-2-2 SA<\n+>q^
* @version 1.0 }#^Cj;
*/ Jj=qC{]
public class ImprovedMergeSort implements SortUtil.Sort { x17:~[c']
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private static final int THRESHOLD = 10; H_?rbz}o
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/* Kg6J:HD49
* (non-Javadoc) k-ZO/yPo
* w-Ph-L/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :Q`Of}#
*/ PaKa bPY
public void sort(int[] data) { Pxl,"
int[] temp=new int[data.length]; 7Yg1z%%U
mergeSort(data,temp,0,data.length-1); > 'R{,1# U
} c4AJ`f.5
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private void mergeSort(int[] data, int[] temp, int l, int r) { "lt<$.
int i, j, k; v-#,@&Uwq
int mid = (l + r) / 2; Sqa9+' [
if (l == r) `"=Hk@E
return; MnD}i&k[
if ((mid - l) >= THRESHOLD) H8YwMhE7
mergeSort(data, temp, l, mid); 20}HTV{v
else |Z>-<]p9g
insertSort(data, l, mid - l + 1); 0h1u W26^
if ((r - mid) > THRESHOLD) ovp/DM
mergeSort(data, temp, mid + 1, r); {z>!Fw
else 2q[pOT'k
insertSort(data, mid + 1, r - mid); qiet<F
@K <Onh`
for (i = l; i <= mid; i++) { 43k'96[2d
temp = data; )Ra:s>
} |pHlBzHj
for (j = 1; j <= r - mid; j++) { >12jUm)
temp[r - j + 1] = data[j + mid]; e[iv"|+
} Lyc6nP;F
int a = temp[l]; FF#Aq
int b = temp[r]; -;gQy[U
for (i = l, j = r, k = l; k <= r; k++) { hj1;f<' U
if (a < b) { |-ZML~2S=h
data[k] = temp[i++]; Ct'tUF<K5
a = temp; w!"A$+~
} else { lZAGoR;0Ra
data[k] = temp[j--]; (EcP'F*;;y
b = temp[j]; _=0Ja S>M.
} -,/7u3
} N&G'i.w/
} /}1|'?P
{-I+
/** uNI&U7_"
* @param data {*;8`+R&
* @param l P?q HzNGi7
* @param i sq=EL+=j
*/ "iEnsP@'Wg
private void insertSort(int[] data, int start, int len) { xp1/@Pw?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [NE!
} q5r7KYH{
} Yp(0XP5o
} 2@bOy~$A
} ;uAh)|;S#
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堆排序： 8\;, d
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package org.rut.util.algorithm.support; {$EX :ID
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import org.rut.util.algorithm.SortUtil; lO\HchGzB
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/** Otu?J_d3
* @author treeroot J8\l'}?&
* @since 2006-2-2 V(kK2az
* @version 1.0 #NyO'
*/ Z?S?O#FED
public class HeapSort implements SortUtil.Sort{ qy?$t:*pp
~I N g9|
/* (non-Javadoc) :C^{Lc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ri-&3%%z<
*/ *b~8`Opa`
public void sort(int[] data) { pGU.+[|(
MaxHeap h=new MaxHeap(); i5(qJ/u
h.init(data); Ruq;:5u
for(int i=0;i h.remove(); i<m) s$u
System.arraycopy(h.queue,1,data,0,data.length); (ID%U
} \<9aS Y'U
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private static class MaxHeap{ >4bw4 Z1
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void init(int[] data){ u0)O Fz
this.queue=new int[data.length+1]; gjD|f2*x
for(int i=0;i queue[++size]=data; WyV,(~y
fixUp(size); tMdSdJ8
} P;(@"gD8z5
} uN?Lz1W\;
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private int size=0; DNDzK iMk
ga KZ4#
private int[] queue; e`a4Gr
((AK7hb
public int get() { g#fn(A
return queue[1]; [e\IHakj
} ,c&t#mu*0
*eD[[HbKX
public void remove() { m{>"
SortUtil.swap(queue,1,size--); <% mD#S
fixDown(1); oFyB-vpYQV
} ^Rl?)_)1HE
file://fixdown {B#w9>'b
private void fixDown(int k) { F~fN7<9R
int j; bCTN^
while ((j = k << 1) <= size) { lO9Ixhf~iu
if (j < size %26amp;%26amp; queue[j] j++; NG\'Ii:-J
if (queue[k]>queue[j]) file://不用交换 Z;u3G4XlF
break; _"H\,7E
SortUtil.swap(queue,j,k); 3J8>r|u;1'
k = j; xIc||o$
} EBWM8~Nm#
} sJQ~:p0e
private void fixUp(int k) { 4uE)*1
while (k > 1) { Y1AZ%{^0a
int j = k >> 1; Nz"K`C>/
if (queue[j]>queue[k]) B<myt79F_[
break; P1L+Vnfu
SortUtil.swap(queue,j,k); rkh%[o9"/
k = j; G{|"WaKW
} S+Ia2O)BA
} O,+9r_Gh
zZY1E@~
} 9%R"(X)
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} LH`$<p2''r
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SortUtil： :%28*fl
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package org.rut.util.algorithm; iBWEZw)
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import org.rut.util.algorithm.support.BubbleSort; $6ucz'
import org.rut.util.algorithm.support.HeapSort; ^K8XY@{&
import org.rut.util.algorithm.support.ImprovedMergeSort; ]m&Ss
import org.rut.util.algorithm.support.ImprovedQuickSort; rHybP6C<
import org.rut.util.algorithm.support.InsertSort; l ~xXy<
import org.rut.util.algorithm.support.MergeSort; -)&lsFF
import org.rut.util.algorithm.support.QuickSort; >#;_Ebl@
import org.rut.util.algorithm.support.SelectionSort; xIb{*)BUwc
import org.rut.util.algorithm.support.ShellSort; ]A\qI>,
S,,Wb&A$
/** ?J+*i d
* @author treeroot { /8s`m
* @since 2006-2-2 SN7_^F
* @version 1.0 pvWj)4e
*/ P uQ
public class SortUtil { -nD}k
public final static int INSERT = 1; KB^GC5L>
public final static int BUBBLE = 2; #K`[XA
public final static int SELECTION = 3; o5+7Lt]
public final static int SHELL = 4; 6/'X$}X
public final static int QUICK = 5; <)J@7@!P
public final static int IMPROVED_QUICK = 6; D4@(_6^
public final static int MERGE = 7; R+U*]5~R
public final static int IMPROVED_MERGE = 8; "}[ ]R
public final static int HEAP = 9; P $r!u%W
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public static void sort(int[] data) { Q2m 5&yy@s
sort(data, IMPROVED_QUICK); gId :IR
} u2':~h?l
private static String[] name={ C.}ho.} r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" iP9Dr<P
}; uc=u4@.>
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private static Sort[] impl=new Sort[]{ 6@d/k.3p
new InsertSort(), R&'Mze fb
new BubbleSort(), ^Y8G}Z|
new SelectionSort(), SM<qb0
new ShellSort(), K)\D,5X^
new QuickSort(), >;s2V_d
new ImprovedQuickSort(), pUgas?e&
new MergeSort(), D [v225
new ImprovedMergeSort(), }$@K
new HeapSort() 5a&gdqg]
}; ?]}=4
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public static String toString(int algorithm){ %2?"x*A
return name[algorithm-1]; \ov]Rn
} LG?b]'#
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public static void sort(int[] data, int algorithm) { ?.MlP,/K
impl[algorithm-1].sort(data); j{m{hVa
} K=P LOC5
V* ,u;*
public static interface Sort { On@p5YRwW
public void sort(int[] data); fKs3H?|
} \J6e/ G
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public static void swap(int[] data, int i, int j) { $K1)2WG
int temp = data; D6P/39}W
data = data[j]; Yp$@i20
data[j] = temp; 6U]"i
} 8PGuZw<
} 2bpFQ8q