[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; )mm0PJF~q
} -fA=&$V
int i1=l; ({t^/b*8
int i2=mid+1; +=E\sEe
for(int cur=l;cur<=r;cur++){ vK)'3%
if(i1==mid+1) Zo&i0%S\E
data[cur]=temp[i2++]; i-v: %
else if(i2>r) n<8WjrK
data[cur]=temp[i1++]; =|E "
else if(temp[i1] data[cur]=temp[i1++]; &wK:R,~x6
else {UP[iw$~
data[cur]=temp[i2++]; r 1r@TG\
} h^=;\ng1l
} hE(R[hc
g}<jn'@{
} C`;igg$t_
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改进后的归并排序: CHKhJ v3+4
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package org.rut.util.algorithm.support; .ifz9jM'
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import org.rut.util.algorithm.SortUtil; ,1mL=|na
-z`%x@F<&L
/** qF~9:`
* @author treeroot Mn ,hmIz
* @since 2006-2-2 >1!u]R<3
* @version 1.0 G%bv<_R
*/ J "I,]
public class ImprovedMergeSort implements SortUtil.Sort { p}!i_P
ASbIc"S6
private static final int THRESHOLD = 10; DW7E ]o
doL-G?8B
/* 5wVJ.B~s
* (non-Javadoc) sF!#*Y
* pL{oVk#,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iRrUIWx
*/ vGv<WEE
public void sort(int[] data) { ]4H)GWHKg
int[] temp=new int[data.length]; _|M8xI
mergeSort(data,temp,0,data.length-1); \o[][R#D
} c_vGr55
rlKR <4H
private void mergeSort(int[] data, int[] temp, int l, int r) { Y ]()v
int i, j, k; [M[#f&=Z
int mid = (l + r) / 2; jOfG}:>e\
if (l == r) 6ncwa<q5
return; e& `"}^X;I
if ((mid - l) >= THRESHOLD) _:9}RT?
mergeSort(data, temp, l, mid); es6YxMg
else v>`Fo[c
insertSort(data, l, mid - l + 1); 4O-LLH
if ((r - mid) > THRESHOLD) [Kc?<3W
mergeSort(data, temp, mid + 1, r); j<kW+Iio
else Am*IC?@tq
insertSort(data, mid + 1, r - mid); UnK7&Uo
a4ViVy
for (i = l; i <= mid; i++) { ;iiCay37F
temp = data; h_4*?w
} p48enH8CO
for (j = 1; j <= r - mid; j++) { q3#[6!
temp[r - j + 1] = data[j + mid]; nvndgeSy
} %mmV#vwp
int a = temp[l]; .hx(9
int b = temp[r]; E\/[hT
for (i = l, j = r, k = l; k <= r; k++) { #[jS&rr(
if (a < b) { 4x)vy-y
data[k] = temp[i++]; PI*@.kqR-
a = temp; MuD ? KK
} else { phH@{mI
data[k] = temp[j--]; sA?8i:]O:
b = temp[j]; iKo2bC:.&
} iz-z?)%
} q~9-A+n
} kV1L.Xg
5vLXMdN
/** ;'{7wr|9
* @param data Zm0VaOT$I
* @param l 23r(4
* @param i k( 0;>)<i
*/ B{Vc-qJ
private void insertSort(int[] data, int start, int len) { |^Y"*Y4*h
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )$TN%hV!
} \Vx^u}3O
} FQO=}0Hl
} Sa<(F[p`
} =.8n K y
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堆排序： ;j1 SSHZ
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package org.rut.util.algorithm.support; Dc0=gq0
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import org.rut.util.algorithm.SortUtil; }=EJM7sM|k
`\VtTS
/** q!Ek EW\n
* @author treeroot 01o<eZ,
* @since 2006-2-2 yP3I^>AZ3
* @version 1.0 Ua \f]y
*/ $CMye; yL
public class HeapSort implements SortUtil.Sort{ #3*cA!V.<
Ct-eD-X{
/* (non-Javadoc) \Ki3ls
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fCUx93,>z
*/ 15jQ87)
public void sort(int[] data) { S'HA]
MaxHeap h=new MaxHeap(); 4k^P1
h.init(data); [w<_Wj
for(int i=0;i h.remove(); %"r9;^bj&<
System.arraycopy(h.queue,1,data,0,data.length); H 0+-$s;f
} A<|9</9z
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private static class MaxHeap{ \r:*`Z*y
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void init(int[] data){ !$l<'K$
this.queue=new int[data.length+1]; Brxnl,%\
for(int i=0;i queue[++size]=data; 7u;N/@
fixUp(size); k9*UBx
} /#vt\I<x
} nmiJ2edx
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private int size=0; H_f8/H
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private int[] queue; z$^wCd:
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public int get() { Nsh/
return queue[1]; *e [*
} Y$v d@Q
XdA]);,
public void remove() { I<RARB-j
SortUtil.swap(queue,1,size--); NB<8M!X/
fixDown(1); ?<4pYEP
} b * \ oQ
file://fixdown U<&=pv
private void fixDown(int k) { 2fkyz
int j; 4RDY_HgF6
while ((j = k << 1) <= size) { *-=/"m
if (j < size %26amp;%26amp; queue[j] j++; S8AbLl9G@>
if (queue[k]>queue[j]) file://不用交换 AQ$)JPs
break; ZgEV-.>P
SortUtil.swap(queue,j,k); =LLpJ+
k = j; V/xXW=
} fUf1G{4
} %iNgHoH
private void fixUp(int k) { F-ZTy"z
while (k > 1) { 5)Z=FUupA~
int j = k >> 1; EoutB Vm
if (queue[j]>queue[k]) EXeV@kg
break; yg8=G vO
SortUtil.swap(queue,j,k); }JtcAuQt
k = j; Z{vc6oj
} O-7)"
} TI8\qIW
Ju#j%!
} lS Y "
HgW!Q(*
} j7E;\AZ^
vKW!;U9~P
SortUtil： k(Xs&f `
^|oI^"IQ=
package org.rut.util.algorithm; Y.I~.66s
rr,A Vw
import org.rut.util.algorithm.support.BubbleSort; .s4vJKK0
import org.rut.util.algorithm.support.HeapSort; ;/V])4=
import org.rut.util.algorithm.support.ImprovedMergeSort; 6, j60`f)
import org.rut.util.algorithm.support.ImprovedQuickSort; kVZs:
import org.rut.util.algorithm.support.InsertSort; 3c#^@Bj(-e
import org.rut.util.algorithm.support.MergeSort; H.iCYD_=
import org.rut.util.algorithm.support.QuickSort; -flcB|I`
import org.rut.util.algorithm.support.SelectionSort; 6@lZVM)E
import org.rut.util.algorithm.support.ShellSort; |8{ k,!P'K
HABUf^~-
/** LsI@_,XW<
* @author treeroot + R6X
* @since 2006-2-2 CB9:53zK9
* @version 1.0 =#4>c8MM
*/ %x,HQNRDU
public class SortUtil { /Bgqf,N |
public final static int INSERT = 1; ?IQDk|<%
public final static int BUBBLE = 2; v B~VJKD
public final static int SELECTION = 3; !oi {8X@
public final static int SHELL = 4; 0?t;3z$n
public final static int QUICK = 5; ye(av&Hn
public final static int IMPROVED_QUICK = 6; %VB4/~ "
public final static int MERGE = 7; sa<\nH$_X
public final static int IMPROVED_MERGE = 8; ;~r-P$kCY
public final static int HEAP = 9; 4sSw7`
_l] 0V g`
public static void sort(int[] data) { ?/T=Gk
sort(data, IMPROVED_QUICK); a{e 2*V
} fzVN;h
private static String[] name={ o3Yb2Nw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" eu)""l
}; ;Q&9t
:''Swi<H
private static Sort[] impl=new Sort[]{ -4Dz98du
new InsertSort(), s\~j,$Mm2
new BubbleSort(), .KG9YGL#
new SelectionSort(), D&K9!z"]
new ShellSort(), 2s,cyCw&
new QuickSort(), e/x 9@1s#
new ImprovedQuickSort(), #F3'<(j
new MergeSort(), <i]-.>&J
new ImprovedMergeSort(), s^6,"C
new HeapSort() !|V_DsP
}; ODKh/u_
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public static String toString(int algorithm){ };}N1[D
return name[algorithm-1]; R-W.$-rF
} r/':^Ex
,hJx3g5#n
public static void sort(int[] data, int algorithm) { WoNJF6=?
impl[algorithm-1].sort(data); JXww_e[
} %@ >^JTkY8
3&E@#I^],
public static interface Sort { IDF0nx]
public void sort(int[] data); E0HE@pqr
} LZG(T$dI
+B8oW3v# )
public static void swap(int[] data, int i, int j) { bUy!hS;s
int temp = data; dtV*CX.D.7
data = data[j]; f6SXXkO+
data[j] = temp; gkTwGI+w
} -;6uN\gq
} [V8^}s}tF