[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; +[ +4h}?
} QD<GXPu?N
int i1=l; hKZ<PwBi
int i2=mid+1; Bh'_@PHP
for(int cur=l;cur<=r;cur++){ h($XR+!#
if(i1==mid+1) 2ZZ%BV!s
data[cur]=temp[i2++]; K?M{=$N
else if(i2>r) 17-D\ +}
data[cur]=temp[i1++]; C-vFl[@a0
else if(temp[i1] data[cur]=temp[i1++]; vG`;2laY
else /7s^OkQ
data[cur]=temp[i2++]; *bi!iz5F
} *.4VO+^
} &, =Z
MLu@|Xgh
} QYm]&;EI
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改进后的归并排序: /-in:gX8
mz|#K7:
package org.rut.util.algorithm.support; M_<? <>|
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import org.rut.util.algorithm.SortUtil; ]c67zyX=%
D*!UB5<>/t
/** ^)qOILn
* @author treeroot NuL.l__W
* @since 2006-2-2 x]e&G!|
* @version 1.0 Bl\/q83(
*/ B)q 5m y
public class ImprovedMergeSort implements SortUtil.Sort { 7GY3_`
Ne 2tfiI`
private static final int THRESHOLD = 10; *B$$6'hi`
91|0{1
/* OA_WjTwDs
* (non-Javadoc) 'Gr}<B$A3
* Q+Sx5JUR~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 12D>~#J
*/ u$vA9g4
public void sort(int[] data) { J)*7JX
int[] temp=new int[data.length]; E41ay:duAl
mergeSort(data,temp,0,data.length-1); )~u<u:N
} RotWMGNK
vr:5+wew
private void mergeSort(int[] data, int[] temp, int l, int r) { +2qCH^80
int i, j, k; | Ns-l (l
int mid = (l + r) / 2; E`M, n,
if (l == r) T@Q,1^?i
return; *bOgRM[
if ((mid - l) >= THRESHOLD) <-Hw@g
mergeSort(data, temp, l, mid); PP]Z~ne0X
else h$[tEmD%
insertSort(data, l, mid - l + 1); ]J]~i[
if ((r - mid) > THRESHOLD) \dB)G<_
mergeSort(data, temp, mid + 1, r); ,V>7eQt?
else sI&|qK-(
insertSort(data, mid + 1, r - mid); <Qx]"ZP%
Hzn6H4Rc
for (i = l; i <= mid; i++) { R6xJw2;_
temp = data; !4?QR
} h;+bHrKji
for (j = 1; j <= r - mid; j++) { |qp^4vq.p
temp[r - j + 1] = data[j + mid]; SU8vz/\%y
} %o4d(C B
int a = temp[l]; w~}*MsB
int b = temp[r]; 9fj8r3 F#
for (i = l, j = r, k = l; k <= r; k++) { eeOE\
if (a < b) { 0@BhRf5
data[k] = temp[i++]; ::&hfHR*P
a = temp; lDK<gd
} else { t XbMP
data[k] = temp[j--]; rQrh(~\:
b = temp[j]; @v:p)|Ne;
} cBGR%w\t%
} ^U5g7Emf
} 8c1ma
Ig.9:v`
/** o 9?#;B$
* @param data [f8mh88r
* @param l )C1ihm!7\
* @param i GIs *;ps7w
*/ gO9\pI2
private void insertSort(int[] data, int start, int len) { K:<0!C!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *# 7 1aZ
} n0T>sE-9
} D.ajO^[
} ?gGmJl
} %]KOxaf_z
>3,t`Z:
堆排序： gf]k@-)
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package org.rut.util.algorithm.support; 4u.v7r
;d#`wSF`G
import org.rut.util.algorithm.SortUtil; i*3*)ly
+{7/+Zz
/** W["c3c
* @author treeroot vIK+18v7
* @since 2006-2-2 7)FI_uW
* @version 1.0 Y/Dah*
*/ Ln3<r&&Jz
public class HeapSort implements SortUtil.Sort{ |B` mWZ'"
:wRaB7
/* (non-Javadoc) U~nW>WJ+.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ej^pFo
*/ '|jN!y^2p
public void sort(int[] data) { ?Z{:[.
MaxHeap h=new MaxHeap(); :5 zXW;s
h.init(data); {0?]weN*
for(int i=0;i h.remove(); ;vkk$ -
System.arraycopy(h.queue,1,data,0,data.length); ]NRQM8\
} :jP4GCxU|
%s(Ri6R&
private static class MaxHeap{ D'UYHc{
;bh[TmQTJ
void init(int[] data){ \0'0)@uziQ
this.queue=new int[data.length+1]; |GqKa
for(int i=0;i queue[++size]=data; 0DR:qw
fixUp(size); g"P!KPrf1p
} /z(;1$Ld6{
} V39`J*fI
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private int size=0; F8T.}qI
4^>FN"Ve`B
private int[] queue; M<KWx'uV
!IUH 5
public int get() { >AUj4d
return queue[1]; &i8UPp%
} 08pG)_L
?A\[EI^
public void remove() { |."thTO
SortUtil.swap(queue,1,size--); u,f$cR
fixDown(1); 9-6E(D-ux
} rf[w&~R
file://fixdown Z'ZN^j{
private void fixDown(int k) { KgCQ4w9
int j; HT@/0MF{J
while ((j = k << 1) <= size) { 0)Wrfa
if (j < size %26amp;%26amp; queue[j] j++; /CT g3Q"KQ
if (queue[k]>queue[j]) file://不用交换 hOTqbd}
break; 6t0-u~
SortUtil.swap(queue,j,k); *(pmFEc
k = j; X61p xPa
} fg8"fbG`:
} =w#sCy
private void fixUp(int k) { uz8Y)b
while (k > 1) { 1|8<!Hx#-
int j = k >> 1; |mO4+:-~D+
if (queue[j]>queue[k]) >kN%R8*Sx
break; 5kju{2`GF
SortUtil.swap(queue,j,k); 99]&Xj
k = j; CKau\N7T
} k5X& |L/
} ,vE)/{:d
<T0+-]i
} !U?Z<zh
5[\LQtM
} Bl6>y/
k#Bq8d
SortUtil： }c1?:8p
D$OUy}[2`.
package org.rut.util.algorithm; 8E:d!?<^&I
{YoK63b$
import org.rut.util.algorithm.support.BubbleSort; q=+AN</
import org.rut.util.algorithm.support.HeapSort; \as^z!<
import org.rut.util.algorithm.support.ImprovedMergeSort; 'GJ'Vli
import org.rut.util.algorithm.support.ImprovedQuickSort; pk&;5|cCD
import org.rut.util.algorithm.support.InsertSort; i[\`]C{gf
import org.rut.util.algorithm.support.MergeSort; 7yDWcm_y
import org.rut.util.algorithm.support.QuickSort; G$HXc$OY
import org.rut.util.algorithm.support.SelectionSort; Y8$,So>~
import org.rut.util.algorithm.support.ShellSort; _,C>+dv)
0wlKBwf`J
/** S7fX1y[
* @author treeroot ]=EYju@
* @since 2006-2-2 @UG%B7
* @version 1.0 o[ua$+67E
*/ @|hn@!YK
public class SortUtil { f(r=S Xa*
public final static int INSERT = 1; )t#v55M
public final static int BUBBLE = 2; ja_.{Zv
public final static int SELECTION = 3; WU" Lu
public final static int SHELL = 4; ha -KfkPFE
public final static int QUICK = 5; `ywI+^b
public final static int IMPROVED_QUICK = 6; (TjY1,f!H
public final static int MERGE = 7; ztRe\(9bL
public final static int IMPROVED_MERGE = 8; ),u)#`.l G
public final static int HEAP = 9; ]@rt/ eX
}+wvZq +c
public static void sort(int[] data) { <RFT W}f!
sort(data, IMPROVED_QUICK); zZ11J0UI
} ^zs]cFN#%
private static String[] name={ u}:p@j}Zv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %0<-5&GE
}; dQkp &.
Q Jnji
private static Sort[] impl=new Sort[]{ dhAkD-Lh
new InsertSort(), c<c"n'
new BubbleSort(), HT: p'Yyi
new SelectionSort(), *sPG,6>
new ShellSort(), j0F'I*Z3
new QuickSort(), P nxxW?
new ImprovedQuickSort(), ff3HR+%M
new MergeSort(), 0:SR29(p1
new ImprovedMergeSort(), 3cH`>#c
new HeapSort() MkCq$MA
}; ER ^#J**
)PNeJf|@
public static String toString(int algorithm){ e~+VN4D&b>
return name[algorithm-1]; 8FmRD
} AzmISm
9:\YEs"
public static void sort(int[] data, int algorithm) { PU\?eA
impl[algorithm-1].sort(data); 2Kg+SLU[~
} [!k#au+#c
4-wCk=I
public static interface Sort { {}W9m)I
public void sort(int[] data); <.HDv:
} q|N/vkqPz
!jIpgs5
public static void swap(int[] data, int i, int j) { S=R}#
int temp = data; <Z -d5D>
data = data[j]; 1l(_SD;90t
data[j] = temp; #go!"HL
} l\NVnXv:>
} P0 va=H