[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; :"ZH
} u>;#.N/
int i1=l; dfB#+wh
int i2=mid+1; T:0X-U
for(int cur=l;cur<=r;cur++){ 2G"mm(
if(i1==mid+1) gnbs^K w
data[cur]=temp[i2++]; .vRLK
else if(i2>r) &J|3uY,'j
data[cur]=temp[i1++]; 3j.Ft*SV
else if(temp[i1] data[cur]=temp[i1++]; 9GS<d.#Nvc
else dN>XZv
data[cur]=temp[i2++]; %8H*}@n
} qF6YH
} +3e(psdg
kr7f<;rmJ
} = PldXw0
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改进后的归并排序: [|UW_Bz
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package org.rut.util.algorithm.support; sm}q&m]ad
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import org.rut.util.algorithm.SortUtil; Df;FOTTi%
HzB&+c?Z
/** 76[aOC2Ad
* @author treeroot U{D ?1tF
* @since 2006-2-2 dQ^>,(
* @version 1.0 Uq)|]a&e
*/ 3+m#v8h1
public class ImprovedMergeSort implements SortUtil.Sort { q`09
)8oI s
private static final int THRESHOLD = 10; wgSA6mQZ
,_`\c7@
/* ~Dr/+h:^\
* (non-Javadoc) gcr,?rE<
* zQxZR}'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AO;`k]0e
*/ ZZTPAmIr
public void sort(int[] data) { _,b%t1v
int[] temp=new int[data.length]; 7dX1.}M<(
mergeSort(data,temp,0,data.length-1); _jef{j
} zsI0Q47\
9A\J*OU
private void mergeSort(int[] data, int[] temp, int l, int r) { HKP\`KBCj
int i, j, k; WX 79V
int mid = (l + r) / 2; -$;H_B+.
if (l == r) E?&dZR
return; ,KkENp_
if ((mid - l) >= THRESHOLD) c[<lr
mergeSort(data, temp, l, mid); G5zZf~r
else D>c%5h
insertSort(data, l, mid - l + 1); RrLQM!~
if ((r - mid) > THRESHOLD) @okC":Fw,
mergeSort(data, temp, mid + 1, r); }K;@$B6,@
else xN2M|E]
insertSort(data, mid + 1, r - mid); %xLziF
AO;+XP=
for (i = l; i <= mid; i++) { *%ZfE,bu8<
temp = data; 9`.b
} ?C.C?h6F5B
for (j = 1; j <= r - mid; j++) { "eI-Y`O,
temp[r - j + 1] = data[j + mid]; 9R>A,x(
} ]*juF[r(
int a = temp[l]; S=[K/Kf-
int b = temp[r]; 3w{4G<I
for (i = l, j = r, k = l; k <= r; k++) { D.qbzJz
if (a < b) { t>&$_CSWK
data[k] = temp[i++]; <3HW!7Ad1
a = temp; AyNl,Xyc4
} else { [$.oyjd
data[k] = temp[j--]; FO3!tJ\L
b = temp[j]; g_>)Q
} +ls *04
} BEPDyy
} zfi{SO l
R9S7p)B
/** L4.yrA-]C%
* @param data Yl8tjq}iC
* @param l }E8 Y,;fTD
* @param i I$qL=
*/ a<!g*UVL0M
private void insertSort(int[] data, int start, int len) { F8b*Mt}p
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `mw@"
} Gpe h#Q4x
} QHMXQyr(
} ~DqNA%Mb
} o1zc`Ibd
K* [cJcY+
堆排序： 6gakopZO
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package org.rut.util.algorithm.support; HW.S~eLw*
qK|r+}g|&
import org.rut.util.algorithm.SortUtil; A!iH g__/t
gADt%K2#Z
/** $6fHY\i#R
* @author treeroot _z,/!>J
* @since 2006-2-2 Y0|~]J(B
* @version 1.0 p4{?Rhb6
*/ Z`b,0[rG[
public class HeapSort implements SortUtil.Sort{ (jY.S|%
+ 6r@HK`,t
/* (non-Javadoc) (O&~*7D*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XFK$p^qu
*/ \iowAo$
public void sort(int[] data) { woR((K] #G
MaxHeap h=new MaxHeap(); .s7/bF
h.init(data); 3w{i5gGn
for(int i=0;i h.remove(); ( Y/ DMQ
System.arraycopy(h.queue,1,data,0,data.length); ,iSs2&$m
} >Cd%tIie*
q;kMeE*
private static class MaxHeap{ u#J5M&#
*WMcE$w/D
void init(int[] data){ ?0'bf y]
this.queue=new int[data.length+1]; |C>Yd*E,C
for(int i=0;i queue[++size]=data; H7qda'%>
fixUp(size); VJ_E]}H
} 9Eg'=YJ
} \8Blq5n-O*
9=3V}]^M
private int size=0; "]MF =-v
;=h^"et
private int[] queue; HLk}E*.mC
&rw|fF|]
public int get() { C:4h
return queue[1]; Zls4@/\Q
} ?r'b Z~
fVf.u'.8
public void remove() { lZn <v'y
SortUtil.swap(queue,1,size--); jgEiemh&
fixDown(1); [FyE{NfiJ%
} w`#lLl B
file://fixdown >-)i_C2
private void fixDown(int k) { z)|56 F7'
int j; r T*:1
while ((j = k << 1) <= size) { []LNNO],X
if (j < size %26amp;%26amp; queue[j] j++; *"9b?`E
if (queue[k]>queue[j]) file://不用交换 m?<C\&)6x
break; |dX#4Mq^,
SortUtil.swap(queue,j,k); FpW{=4yk
k = j; L]HY*e
} @*%.V.
} h+Dg"j<[
private void fixUp(int k) { II~D66 bF
while (k > 1) { >DbG$V<v'
int j = k >> 1; ;Rwr5
if (queue[j]>queue[k]) Z71"d"
break; 3j.f3~"
SortUtil.swap(queue,j,k); h ?p^DPo
k = j; l'3NiIX
} 2@e<II2ha8
} eKStt|M'
5vP*oD
} cp.)K!$
<'GI<Hc
} u:m]-'
+8BH%f}X
SortUtil： ?'h@!F%R'
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package org.rut.util.algorithm; U8<GD|
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import org.rut.util.algorithm.support.BubbleSort; @.CPZT
import org.rut.util.algorithm.support.HeapSort; `86 9XE
import org.rut.util.algorithm.support.ImprovedMergeSort; O 6A:0yM4
import org.rut.util.algorithm.support.ImprovedQuickSort; 7Bmt^J5i&t
import org.rut.util.algorithm.support.InsertSort; C'5i>;
import org.rut.util.algorithm.support.MergeSort; :Z=A,G
import org.rut.util.algorithm.support.QuickSort; vhhsOga
import org.rut.util.algorithm.support.SelectionSort; uOW9FAW
import org.rut.util.algorithm.support.ShellSort; umls=iz
_/MKU!\l
/** `7N[rs9|S
* @author treeroot C@Wm+E~;8
* @since 2006-2-2 ~Dkje
* @version 1.0 \".3x PkE
*/ a_x|PbD
public class SortUtil { RqcX_x(p
public final static int INSERT = 1; gCwg ;c-
public final static int BUBBLE = 2; :5CwRg
public final static int SELECTION = 3; *AxKV5[H
public final static int SHELL = 4; \:"s*-
public final static int QUICK = 5; Sf*VkH
public final static int IMPROVED_QUICK = 6; ,VHvQU
public final static int MERGE = 7; 5RlJybN"o
public final static int IMPROVED_MERGE = 8; c]xpp;%]
public final static int HEAP = 9; KgKV(q=
o'D6lkf0
public static void sort(int[] data) { 0V`/oaW;
sort(data, IMPROVED_QUICK); TH6g:YP`7
} KUuwScb\
private static String[] name={ k ( R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -M[5K/[
}; k`TEA?RfQ
# <&=ZLN
private static Sort[] impl=new Sort[]{ \=83#*KK
new InsertSort(), =2`s Uw}
new BubbleSort(), ~'T]B{.+J
new SelectionSort(), C(?lp
new ShellSort(), `9$?g|rB
new QuickSort(), K<|eZhp~
new ImprovedQuickSort(), *M KVm)Iv
new MergeSort(), {d7KJmN
new ImprovedMergeSort(), 0HG*KW
new HeapSort() e@X~F6nP
}; O'5(L9,
B VPf8!-
public static String toString(int algorithm){ KQr=;O\T
return name[algorithm-1]; 5(U.<
} \6@}HFH
<cWo]T`X!
public static void sort(int[] data, int algorithm) { '5[L []A
impl[algorithm-1].sort(data); ^s24f?3
} Iem* 'r
N 4,w
public static interface Sort { u2U@Qrs2
public void sort(int[] data); fT'A{&h|U
} 9$d (`-&9p
AY *
public static void swap(int[] data, int i, int j) { QR^pu.k@
int temp = data; -G*u2i_*
data = data[j]; =@ON>SmPs
data[j] = temp; )ns;S
} qLPI^g,
} Uvz9x"0[u