[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; {X=gjQ9
} qOyg&]7
int i1=l; P= e3f(M2
int i2=mid+1; =Q % F~
for(int cur=l;cur<=r;cur++){ IF<?TYy=3B
if(i1==mid+1) D[.;-4"_
data[cur]=temp[i2++]; {Z>OAR#
else if(i2>r) +V"t't7
data[cur]=temp[i1++]; 8vhg{L..
else if(temp[i1] data[cur]=temp[i1++]; ail%#E8
else &dqC =oK]
data[cur]=temp[i2++]; 82w='~y
} 99'e)[\
} 3y}0J @
#d+bld\
} N# Ru`;
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改进后的归并排序: k79"xyXX
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package org.rut.util.algorithm.support; <NV[8B#k]
9{gY|2R_
import org.rut.util.algorithm.SortUtil; 6}aIb.j
xWY%-CWY.
/** 95.m^~5
* @author treeroot CJ*8x7-t
* @since 2006-2-2 Z J:h]
* @version 1.0 D49yV`
*/ O|t@p=]
public class ImprovedMergeSort implements SortUtil.Sort { j@jaFsX|
S>W_p~@
private static final int THRESHOLD = 10; nf,R+oX
CzP?J36W^
/* icq!^5BzL
* (non-Javadoc) nLn3kMl4
* b' 1%g}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y{>d&M|
*/ 5iE-$,7#L
public void sort(int[] data) { &|;XLRHP}
int[] temp=new int[data.length]; VdrqbZ
mergeSort(data,temp,0,data.length-1); OK{_WTCe>
} !d@qT.
]>E)0<t
private void mergeSort(int[] data, int[] temp, int l, int r) { ?0%yDq1_
int i, j, k; s?=v@|vz)
int mid = (l + r) / 2; #0K122oY
if (l == r) oyQp"'|N
return; jf_xm=n
if ((mid - l) >= THRESHOLD) .;ptgX
mergeSort(data, temp, l, mid); 0PiD<*EA
else +!dWQ=W
insertSort(data, l, mid - l + 1); Qh4@Nl#Ncf
if ((r - mid) > THRESHOLD) ~x:\xQti
mergeSort(data, temp, mid + 1, r); Ks|qJ3;
else DnbT<oEL
insertSort(data, mid + 1, r - mid); [If%+mHdU
-;5WMX6
for (i = l; i <= mid; i++) { AE1EZ#
temp = data; (*{Y#XD{
} I9xQ1WJc`
for (j = 1; j <= r - mid; j++) { 'CE3 |x\%K
temp[r - j + 1] = data[j + mid]; EbEQ@6t
} rkdf htpI
int a = temp[l]; 1P(5+9"s
int b = temp[r]; aS ]bTYJ'
for (i = l, j = r, k = l; k <= r; k++) { z8HOig?
if (a < b) { 2g>4fZ
data[k] = temp[i++]; a[Pyxx_K
a = temp; E-P;3lS~
} else { .M3]\I u
data[k] = temp[j--]; n< npJ*
b = temp[j]; I[mlQmwsL.
} }m!L2iK4qk
} q)Qd+:a7{
} &e2|]C4
+n]z'pijb
/** nE_g^
* @param data u4 ##*m
* @param l U^ bF}4m
* @param i %Vf3r9 z
*/ -4 ~(*
private void insertSort(int[] data, int start, int len) { TvV_Tz4e
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yV;_]_EO
} 60 D0z
} -0Ws3
} a: Ch"la
} 8SV.giG;
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堆排序： a?_!
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package org.rut.util.algorithm.support; xa7~{ E,
y5"b(nb
import org.rut.util.algorithm.SortUtil; dD%Sbb
j2@19YXe@
/** /Y NV
* @author treeroot @|3PV
* @since 2006-2-2 woQ UrO(
* @version 1.0 1N8:,bpsT
*/ dvPK5+0W?
public class HeapSort implements SortUtil.Sort{ 2n/cqK
3aD\J_
/* (non-Javadoc) 0l.\KF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qfRsp rRI"
*/ `7.(dn>WL0
public void sort(int[] data) { BZ2frG\0&I
MaxHeap h=new MaxHeap(); 0rnne L
h.init(data); Z/Vb_
for(int i=0;i h.remove(); Me*woCos'
System.arraycopy(h.queue,1,data,0,data.length); ~"eQPTd
} XsOz {?G
d7g3VF<j
private static class MaxHeap{ GJpQcse%
uT")j,tz
void init(int[] data){ }f/xMp-Y
this.queue=new int[data.length+1]; FLWQY,
for(int i=0;i queue[++size]=data; w.AF7.X`1
fixUp(size); w6b\l1Z
} #*J+4aw3
} w$E8R[J~P
`$kKTc:f
private int size=0; @51!vQwqR
#Cj$;q{!
private int[] queue; P4h^_*d
%jS#DVxBR
public int get() { S,I|8 YE
return queue[1]; #YABbwH
} u~JCMM$
hxt,%al
public void remove() { g}uVuK;<
SortUtil.swap(queue,1,size--); WTlR>|Zdn
fixDown(1); **RW 9FU
} bcVzl]9
file://fixdown 71g\fGG\
private void fixDown(int k) { -#TF&-
int j; -XbO[_Wf
while ((j = k << 1) <= size) { {pzu1*
if (j < size %26amp;%26amp; queue[j] j++; h'QEwW
if (queue[k]>queue[j]) file://不用交换 y<r@zb9
break; ")gd)_FOS
SortUtil.swap(queue,j,k); GjHV|)^
k = j; Qp]-:b
} -W6r.E$mC
} EWU(Al T
private void fixUp(int k) { oU\Q|mN(
while (k > 1) { y2_^lW%
int j = k >> 1; :)~idVlV
if (queue[j]>queue[k]) ,_G((oS40
break; QTy xx
SortUtil.swap(queue,j,k); /o/0 9K
k = j; ">-mZ'$#L
} <B3v4f
} ?PpGBm2f*
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} 7 3 Oo;
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} 1u%e7
TB oN8cB}
SortUtil： ~|FKl%
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package org.rut.util.algorithm; *5Mg^}ZC5
J)148/
import org.rut.util.algorithm.support.BubbleSort; JGLjx"Y
import org.rut.util.algorithm.support.HeapSort; JA")L0a_
import org.rut.util.algorithm.support.ImprovedMergeSort; #z(JYw,
import org.rut.util.algorithm.support.ImprovedQuickSort; x)^/3
import org.rut.util.algorithm.support.InsertSort; uU|fCwQt
import org.rut.util.algorithm.support.MergeSort; Z'u:Em
import org.rut.util.algorithm.support.QuickSort; &efwfnG<
import org.rut.util.algorithm.support.SelectionSort; J2vaKl
import org.rut.util.algorithm.support.ShellSort; ]j^V5y"
r+#!]wNPe
/** y*f5_
* @author treeroot Q?1' JF!G
* @since 2006-2-2 S4'\=w#
* @version 1.0 8J5{}4s\f
*/ @2Spfj_e
public class SortUtil { +WxZB
public final static int INSERT = 1; =7*k>]o
public final static int BUBBLE = 2; z 8w&;Ls
public final static int SELECTION = 3; MO1t0Myc
public final static int SHELL = 4; ulqh}Uv'
public final static int QUICK = 5; SK>*tKY
public final static int IMPROVED_QUICK = 6; Y[\ZN
public final static int MERGE = 7; {I]X-+D|_
public final static int IMPROVED_MERGE = 8; #]vy`rv
public final static int HEAP = 9; !)nA4l=S#
:(^,WOf
public static void sort(int[] data) { Sz"rp9x+
sort(data, IMPROVED_QUICK); f0<'IgN
} x|TLMu=3=
private static String[] name={ qh40nqS;9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L_k'r\L
}; =Nc}XFq
G#|`Bjv"aP
private static Sort[] impl=new Sort[]{ 3lZ5N@z69
new InsertSort(), ]O\m(of R
new BubbleSort(), ;:^^Qfp
new SelectionSort(), 1=9M@r~ ^
new ShellSort(), CP%?,\
new QuickSort(), bPe|/wp
new ImprovedQuickSort(), jRhOo%p
new MergeSort(), cyQ&w>'
new ImprovedMergeSort(), 52zD!(
new HeapSort() nw)yK%`;M
}; U}=o3u
M^e;WY@ D
public static String toString(int algorithm){ +H'{!:e5
return name[algorithm-1]; EWr8=@iU
} pyf/%9R:d
}uCC~ <^
public static void sort(int[] data, int algorithm) { &idPO{G
impl[algorithm-1].sort(data); j9bn|p$DA
} ,rC$~ &
BS6UXAf{|Z
public static interface Sort { IpRdGT02
public void sort(int[] data); ]P5|V4FXo
} ]csfK${
*yDsK+[_
public static void swap(int[] data, int i, int j) { H J8rb
int temp = data; {dbPMx
data = data[j]; d/m.VnW
data[j] = temp; IwR/4LYI
} #y?iUv
} 'JjW5