[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; ;`',M6g
} F7lhLly
int i1=l; SYd4 3PA
int i2=mid+1; "s[wLclfG
for(int cur=l;cur<=r;cur++){ 8)HUo?/3
if(i1==mid+1) UZ7Zzc#g
data[cur]=temp[i2++]; L#mf[a@pCn
else if(i2>r) HZC^Q7]hy
data[cur]=temp[i1++]; ~``oKiPg@
else if(temp[i1] data[cur]=temp[i1++]; +U{8Mj
else ;"46H'>!
data[cur]=temp[i2++]; "/[xak!g
} low 0@+Q
} >Lj0B%^EvM
=i[_C>U
} Xc~yr\%]
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改进后的归并排序: U Hh
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package org.rut.util.algorithm.support; ,Z*&QR
UngDXD )
import org.rut.util.algorithm.SortUtil; a)w *
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/** cB#5LXbCE
* @author treeroot *P2_l Q=
* @since 2006-2-2 3gtQS3$4s
* @version 1.0 Kab"r_'
*/ 6D3hX>K4
public class ImprovedMergeSort implements SortUtil.Sort { @=JOAo
ieuq9ah#
private static final int THRESHOLD = 10; :bt;DJ@
Em8q1P$tm>
/* BUB$k7{z
* (non-Javadoc) #4UKkd
* mU@pRjq=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UW%zR5q
*/ Nki08qZ[
public void sort(int[] data) { tNP>6F/
int[] temp=new int[data.length]; +l'l*<
mergeSort(data,temp,0,data.length-1); ]S!:p>R
} M ,!Dhuas
VRden>vKN
private void mergeSort(int[] data, int[] temp, int l, int r) { %L(;}sJ.
int i, j, k; Kz>bfq7
int mid = (l + r) / 2; mQ(6ahD U
if (l == r) ,F}\njL
return; $>^DkrOd
if ((mid - l) >= THRESHOLD) %S*<2F9
mergeSort(data, temp, l, mid); UF37|+"E
else b7-M'-Km0_
insertSort(data, l, mid - l + 1); ;;>hWAS
if ((r - mid) > THRESHOLD) rywui10x*
mergeSort(data, temp, mid + 1, r); pUbf]3 t
else L_4c~4
insertSort(data, mid + 1, r - mid); ; '6`hZ
,', S
for (i = l; i <= mid; i++) { )B"k;dLm
temp = data; W^dk:
} })#VO-J
for (j = 1; j <= r - mid; j++) { T($d3Nn1
temp[r - j + 1] = data[j + mid]; xib?XzxGo
} !@>_5p>q*
int a = temp[l]; Vx'82CIC
int b = temp[r]; :\hcl&W:
for (i = l, j = r, k = l; k <= r; k++) { j'L/eps?S
if (a < b) { ]k+XL*]'A
data[k] = temp[i++]; S+wy^x@@
a = temp; YkWv*l
} else { \vg(@)$q
data[k] = temp[j--]; ;IV
b = temp[j]; H(|n,c
} v9*ugu[K9
} o,qq*}=
} P}"=67$
hSAdD!
/** oVZI([O
* @param data RBOb/.$
* @param l pg<m0g@W*;
* @param i #3VOC#.
*/ ht>C6y
private void insertSort(int[] data, int start, int len) { |:7 ^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {"v~1W)
} _PPZ!r(
} da[=d*I.
} &,DZ0xA
} dw*PjIB9x
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堆排序： Tumv0=q4wd
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package org.rut.util.algorithm.support; ) |t;nK,
y<9' 3\
import org.rut.util.algorithm.SortUtil; pVm]<jO
q\DN8IJ
/** YL?2gBT
* @author treeroot 5& 2([
* @since 2006-2-2 7Gh+EJJ3I
* @version 1.0 KUD.hK.
*/ _BFDsQ
public class HeapSort implements SortUtil.Sort{ ?T1vc
qg2fTe
/* (non-Javadoc) og[cwa_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) % _.kd"
*/ *;ehSg9
public void sort(int[] data) { xF8U )j!
MaxHeap h=new MaxHeap(); d/&W[jJ
h.init(data); gPE`mE
for(int i=0;i h.remove(); uqotVil,
System.arraycopy(h.queue,1,data,0,data.length); nsA}A~(E
} H^3f!\MC;o
AT6o~u!WU
private static class MaxHeap{ \k4em{K
.#q]{j@Ot
void init(int[] data){ ~:JoKm`vU
this.queue=new int[data.length+1]; ?<;9=l\Q
for(int i=0;i queue[++size]=data; QjlQsN!
fixUp(size); #"qP4S2
} N%f% U
} n 9>**&5L
C^IPddw>
private int size=0; W5*Kq^6Pd
b)+;=o%
private int[] queue; w!%"b03q
4j1$1C{
public int get() { Wa5B;X~
return queue[1]; eS: 8Pn
} +dG3/vV
Hk8lHja+\
public void remove() { JW},7Ox
SortUtil.swap(queue,1,size--); _j\GA6
fixDown(1); XN^l*Q?3n
} \Ota~A
file://fixdown sRI0;
private void fixDown(int k) { ^7Rc\
int j; 3<x1s2U
while ((j = k << 1) <= size) { $2E&~W %
if (j < size %26amp;%26amp; queue[j] j++; 41v#|%\w
if (queue[k]>queue[j]) file://不用交换 1j*E/L
break; bu8AOtY9E-
SortUtil.swap(queue,j,k); Z35(f0b
k = j; yE#.Q<4
} EJW}&e/
} 4{QD: D(D
private void fixUp(int k) { >Jk]=_%
while (k > 1) { ^O3i)GO
int j = k >> 1; gy`WBg(7x
if (queue[j]>queue[k]) |yinVfZ0C
break; j.ZXLe~
SortUtil.swap(queue,j,k); \ z3>kvk
k = j; ^~1Z"kAnT
} ^)E# c
} HfPu~P
^]NFr*'!
} Bwc_N.w?3
_Rb>py
} Xqy9D ZIn
LO;?#e7
SortUtil： ElA(1o|9I
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package org.rut.util.algorithm; g)1`A24
sj3[ny;b
import org.rut.util.algorithm.support.BubbleSort; yBRYEqS+
import org.rut.util.algorithm.support.HeapSort; h0&Oy52
import org.rut.util.algorithm.support.ImprovedMergeSort; ._q}lWT
import org.rut.util.algorithm.support.ImprovedQuickSort; h e[2,
import org.rut.util.algorithm.support.InsertSort; 4;2
import org.rut.util.algorithm.support.MergeSort; _+9o'<#u(
import org.rut.util.algorithm.support.QuickSort; >}E
import org.rut.util.algorithm.support.SelectionSort; G3o`\4p
import org.rut.util.algorithm.support.ShellSort; }60/5HNr
3UX6Y]E3
/** FN/siw(?3
* @author treeroot CjGQ
* @since 2006-2-2 u[HamGxx$u
* @version 1.0 LP'wL6#
*/ F!<!)_8Q
public class SortUtil { g3 opN>W
public final static int INSERT = 1; xpp>5d !
public final static int BUBBLE = 2; VfFbZds8f
public final static int SELECTION = 3; $H`{wJ?2(
public final static int SHELL = 4; v~A*?WU;n
public final static int QUICK = 5; &^7(?C'u
public final static int IMPROVED_QUICK = 6; Qd/x{a8
public final static int MERGE = 7; 4"pU\g
public final static int IMPROVED_MERGE = 8; u}.mJDL
public final static int HEAP = 9; >QdT7gB
!;UoZ~
public static void sort(int[] data) { nT%ko7~-
sort(data, IMPROVED_QUICK); >qVSepK3
} (<}BlL
private static String[] name={ qP$)V3l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _fccZf(yC.
}; @R Jr ~y0
r=/$}l4
private static Sort[] impl=new Sort[]{ iS< ^MD
new InsertSort(), F1t+D)KA>
new BubbleSort(), )O2IEwPd.
new SelectionSort(), #||D,[ _=+
new ShellSort(), Jflm-Hhsf
new QuickSort(), J|w%n5Y
new ImprovedQuickSort(), 8O_yZ ~Z4
new MergeSort(), Us.k,
new ImprovedMergeSort(), Ae%AG@L
new HeapSort() 26;Gt8
}; {rwT4]4
F!fsW9
public static String toString(int algorithm){ BV6B:=E0
return name[algorithm-1]; $*:g~#bh
} N@Q_5t0bk
a2[rY
public static void sort(int[] data, int algorithm) { >Q=Q%~
impl[algorithm-1].sort(data); !4T!@"#
} m8V}E&6
Q_Wg4n5
public static interface Sort { `2/V.REX$h
public void sort(int[] data); yJ="dEn>i"
} dZox;_b
{:|b,ep T
public static void swap(int[] data, int i, int j) { tXuf!
int temp = data; .Q^V,[on1T
data = data[j]; fRT4>So
data[j] = temp; mL-6+pJ@
} oQA,57B
} Q/q>mN"#1