[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; L}U fd >*
} |FD-q.AV
int i1=l; @7B!(Q
int i2=mid+1; g~=#8nJ
for(int cur=l;cur<=r;cur++){ DadlCEZv
if(i1==mid+1) c_bIadE{
data[cur]=temp[i2++]; "^@0zy@x
else if(i2>r) =C2,?6!
data[cur]=temp[i1++]; xyTjK.N
else if(temp[i1] data[cur]=temp[i1++]; mH} 1Zy
else ul3._Q
data[cur]=temp[i2++]; xk5Z&z
} i;B)@op.#
} [2cG 7A
H<YS2Ed
} +3D3[.n
"#mr?h_
改进后的归并排序: @RF!p
qS|t7*
package org.rut.util.algorithm.support; p1L8g[\
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import org.rut.util.algorithm.SortUtil; E7qk>~Dg
NrdbXPHceN
/** 'Nv*ePz
* @author treeroot J0M7f]
* @since 2006-2-2 `PR)7}/<
* @version 1.0 @(:M?AO9S.
*/ dRXF5Ox5K}
public class ImprovedMergeSort implements SortUtil.Sort { >;.'$-
e03q9(
private static final int THRESHOLD = 10; Q}M% \v
v(/T<^{cuk
/* P'6eK?
* (non-Javadoc) EnGVp<6R
* Rj9YAW$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gzthM8A
*/ g9`z]qGWS:
public void sort(int[] data) { ^F `
int[] temp=new int[data.length]; E1'HdOh&z
mergeSort(data,temp,0,data.length-1); Eh)PZvH
} Vs)Pg\B?
*eAsA(;
private void mergeSort(int[] data, int[] temp, int l, int r) { EencMi7J
int i, j, k; Gvk)H$ni
int mid = (l + r) / 2; c_e2'K:
if (l == r) K"O+`2$
return; 90oG+T4
if ((mid - l) >= THRESHOLD) )B86
mergeSort(data, temp, l, mid); -rSpgk0wL
else J2M[aibV
insertSort(data, l, mid - l + 1); 0yhC_mI
if ((r - mid) > THRESHOLD) YQWGv,47\
mergeSort(data, temp, mid + 1, r); 3?F*|E_
else ~.?,*q7
insertSort(data, mid + 1, r - mid); J|-X?V;ZW
Nv@SpV'
for (i = l; i <= mid; i++) { r5kKNyJ
temp = data; $^F L*w
} iYi3x_A`
for (j = 1; j <= r - mid; j++) { '%.:97
temp[r - j + 1] = data[j + mid]; ]o18oY(
} PT7-_r
int a = temp[l]; y3^<rff3Gc
int b = temp[r]; a\60QlAk~
for (i = l, j = r, k = l; k <= r; k++) { /a}F;^
if (a < b) { W_:3Sj l'
data[k] = temp[i++]; a:*8SovI
a = temp; q#RUL!WF7U
} else { SJg4P4|
data[k] = temp[j--]; 0x&-/qce6W
b = temp[j]; $l05VZ
} ' U]\]Wp
} SvZ~xTit
} >yr:L{{D}G
6'YT3=
/** TR;"&'#k
* @param data S{HAFrkm7
* @param l (_h=|VjK(I
* @param i kj_MzgC'?
*/ 2a=3->D&
private void insertSort(int[] data, int start, int len) { <'n'>@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); e"7<&% Oq
} CD}::7$
} 0&M~lJ
} [{iPosQWj
} =E6ND8l@2
~ _ ogeD
堆排序： 63'Rw'g^|2
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package org.rut.util.algorithm.support; %rE:5)
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import org.rut.util.algorithm.SortUtil; O52B
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/** JRti2Mu
* @author treeroot >:o$h2
* @since 2006-2-2 s2Z'_rT
* @version 1.0 `O+}$wP
*/ k^VL{z:EWB
public class HeapSort implements SortUtil.Sort{ ]>vC.iYp
{ef9ov Xk
/* (non-Javadoc) ~F [V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ={'3j
*/ qLjLfJJ2
public void sort(int[] data) { YR'dl_
MaxHeap h=new MaxHeap(); 0r_3:#Nn
h.init(data); 53X i)
for(int i=0;i h.remove(); Lm-f0\(
System.arraycopy(h.queue,1,data,0,data.length); Y0z)5),[U:
} /Fr*k5I
!n`9V^`
private static class MaxHeap{ ltWEA
?4`f@=}'K
void init(int[] data){ 2v$\mL
this.queue=new int[data.length+1]; 9q/k,g
for(int i=0;i queue[++size]=data; dDg[ry
fixUp(size); \sn wR
} Yt!o Hn
} uVth&4dh9
iFOa9!_0n
private int size=0; >b7Yk)[%
BT^Im=A
private int[] queue; >rhqhmh;W"
w#d7
public int get() { v)j3YhY
return queue[1]; FfRvi8
} h wi!C}
Cl8S_Bz
public void remove() { &W8fEQwa
SortUtil.swap(queue,1,size--); [-0=ZKH?
fixDown(1); 5_\1f|,
} ~v@.YJoZ4Z
file://fixdown cd&sAK"
private void fixDown(int k) { 0 wjL=]X1e
int j; \zJb}NbnT
while ((j = k << 1) <= size) { z8dBfA<z
if (j < size %26amp;%26amp; queue[j] j++; 03n+kh
if (queue[k]>queue[j]) file://不用交换 kmg/hNtN
break; I]z4}#+cX
SortUtil.swap(queue,j,k); _<6E>"*m
k = j; Yc:>Yzj(z
} (GoxiX l
} e>UU/Ks
private void fixUp(int k) { ]pWn%aGv*Y
while (k > 1) { N^{}Qvrr
int j = k >> 1; {(IHHA>
if (queue[j]>queue[k]) ^v&"{2
break; % kaV?j
SortUtil.swap(queue,j,k); g;7W%v5wqk
k = j; ^KJi|'B
} Y%!k'\n[2
} pwvmb\
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} x9o(q`N
n0FzDQt26
} ?jU 3%"
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SortUtil： mLV0J '
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package org.rut.util.algorithm; w0O(>
q>6RO2,
import org.rut.util.algorithm.support.BubbleSort; y\n#`*5k
import org.rut.util.algorithm.support.HeapSort; sVH w\_F$
import org.rut.util.algorithm.support.ImprovedMergeSort; 5S ) N&%
import org.rut.util.algorithm.support.ImprovedQuickSort; q#F+^)DD [
import org.rut.util.algorithm.support.InsertSort; !ZM*)6^
import org.rut.util.algorithm.support.MergeSort; wkY$J\J
import org.rut.util.algorithm.support.QuickSort; ltv~Kh
import org.rut.util.algorithm.support.SelectionSort; ,uD}1 G<u
import org.rut.util.algorithm.support.ShellSort; N"7BV
vCn~-Q
/** bduHYs+rq
* @author treeroot L=5Y^f'aU
* @since 2006-2-2 RSx{Gbd4X
* @version 1.0 {5 3#Xd
*/ zj$Ve
public class SortUtil { B}@CtVWFz
public final static int INSERT = 1; 39x 4(
public final static int BUBBLE = 2; !FQS9SoO9
public final static int SELECTION = 3; %r@:7/
public final static int SHELL = 4; z`YAOhD*h4
public final static int QUICK = 5; #dFE}!"#`
public final static int IMPROVED_QUICK = 6; (rQ)0g@
public final static int MERGE = 7; mj ,Oy
public final static int IMPROVED_MERGE = 8; aNgJm~K0P
public final static int HEAP = 9; [7l5p(=
aN';_tGvK
public static void sort(int[] data) { gu1n0N`b
sort(data, IMPROVED_QUICK); /S9n!H:MT
} 0xV[C4E[6
private static String[] name={ =kw6<!R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" n>YgL}YZ?
}; zomg$@j
]_hXg*?
private static Sort[] impl=new Sort[]{ w!RJ8
new InsertSort(), 0C717
new BubbleSort(), 7H. HiyppW
new SelectionSort(), 85](,YYz
new ShellSort(), _<jccQ
new QuickSort(), zTze%
new ImprovedQuickSort(), D[(T--LLT
new MergeSort(), % %QAC4
new ImprovedMergeSort(), *B+YG^Yu^
new HeapSort() r]%.,i7~8
}; [jF\"#A
{ZgycMS
public static String toString(int algorithm){ 6K5KkEp
return name[algorithm-1]; e{,[\7nF
} _aOsFFB1KF
@"`{Sh`Y$
public static void sort(int[] data, int algorithm) { \JGRd8S[
impl[algorithm-1].sort(data); nHB`<B
} dYhLk2
nb|"dK|
public static interface Sort { D"n 3If%
public void sort(int[] data); +,}CuF
} G$ Ii
,DbT4Ul c
public static void swap(int[] data, int i, int j) { s}":lXkrw
int temp = data; 1H,hw
data = data[j]; ,6a }l;lv
data[j] = temp; Q"H1(kG|
} w5}2$r
} As*59jkB