[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; TaQ "G
} \LoSUl i
int i1=l; <W=[ sWJ
int i2=mid+1; #!=>muZt
for(int cur=l;cur<=r;cur++){ :Bv&)RK
if(i1==mid+1) ;TV'PJ
data[cur]=temp[i2++]; Z!RRe]"y
else if(i2>r) `YmI'
data[cur]=temp[i1++]; Q0q)n=i}]
else if(temp[i1] data[cur]=temp[i1++]; )' x/q
else fv j5[Q
data[cur]=temp[i2++]; OZC/+"\,
} g?A5'o&Yu
} Qk~0a?#y5
$-fjrQ
} 0bPJEEd
}lC64;yo
改进后的归并排序: CdzkMVH
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package org.rut.util.algorithm.support; =JbdsYI(
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import org.rut.util.algorithm.SortUtil; Jp.3KA>
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/** .sJys SA\
* @author treeroot K.#,O+-Kg`
* @since 2006-2-2 `hK>bHj
* @version 1.0 {? K|(C
*/ mHI4wS>()+
public class ImprovedMergeSort implements SortUtil.Sort { K.V!@bPlw9
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private static final int THRESHOLD = 10; hk"9D<&i>b
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/* 6cQeL$,SQ
* (non-Javadoc) GLaZN4`
* >p]WCb'PH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wv7p,9Z[
*/ '.%iPMM
public void sort(int[] data) { >ggk>s|
int[] temp=new int[data.length]; U+9-li
mergeSort(data,temp,0,data.length-1); U!a!|s>
} vR%j#v|s
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private void mergeSort(int[] data, int[] temp, int l, int r) { e8XM=$@
int i, j, k; {FV,j.D
int mid = (l + r) / 2; &AQg'|
if (l == r) /`4v"f0V
return; #uD)0zdw
if ((mid - l) >= THRESHOLD) Vp(D|}P
mergeSort(data, temp, l, mid); koncWyW
else 0$xK
insertSort(data, l, mid - l + 1); 3r~>~ueZ
if ((r - mid) > THRESHOLD) %jbJ6c
mergeSort(data, temp, mid + 1, r); G|QUujl
else )Y&MIJ7>@
insertSort(data, mid + 1, r - mid); p|FlWR'mA
A6?qIy
for (i = l; i <= mid; i++) { w|!YoMk+o
temp = data; KAj"p9hq+k
} O3^98n2
for (j = 1; j <= r - mid; j++) { 1&X}1
temp[r - j + 1] = data[j + mid]; RL7C YB
} {f`lSu
int a = temp[l]; Qa,NGP.
int b = temp[r]; ]k[Q]:q
for (i = l, j = r, k = l; k <= r; k++) { 88Fb1!a5Z
if (a < b) { S+.21,
data[k] = temp[i++]; Pcs^@QP
a = temp; o|z+!,
} else { bn0"M+7)f
data[k] = temp[j--]; E/"YId `A
b = temp[j]; -kG3k> by_
} (w5u*hx
} EpRXjz
} :`:xP
e+NWmu{<_
/** ?60>'Xjj
* @param data _v1bTg"?
* @param l %iK%$
* @param i pY^pTWs(
*/ +90u!r^v
private void insertSort(int[] data, int start, int len) { x1|Da$2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3x04JE3!
} <'r0r/0g?
} Dl0/-=L
} sFbfFUd
} qru2h #
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堆排序： ^36M0h|R
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package org.rut.util.algorithm.support; v*&Uk'4E
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import org.rut.util.algorithm.SortUtil; uQeqnGp
JzHqNUn*M
/** zl0;84:H
* @author treeroot %GM>u2baw
* @since 2006-2-2 ^$e0t;W=
* @version 1.0 [<_"`$sm=
*/ 4O$mR
public class HeapSort implements SortUtil.Sort{ *y)4D[ z-
#0}Ok98P
/* (non-Javadoc) )J;ny!^2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6a7vlo
*/ P;j&kuW|zL
public void sort(int[] data) { :lgHL3yl
MaxHeap h=new MaxHeap(); \BLp-B1s
h.init(data); -<8B,
for(int i=0;i h.remove(); S <2}8D
System.arraycopy(h.queue,1,data,0,data.length); yPSVwe|g
} PoJmW^:}
;?0_Q3IML
private static class MaxHeap{ z9^c]U U)E
Cy`26[E$S
void init(int[] data){ F|,6N/;!W
this.queue=new int[data.length+1]; >H$;Z$o*(
for(int i=0;i queue[++size]=data; +yGY785b
fixUp(size); Ft3I>=f{
} Sc$gnUYD{
} l`DtiJ?$$0
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private int size=0; 9e]'OKL+
itw{;j
private int[] queue; p7s@%scp
;8BA~,4l
public int get() { e$HQuA~Q;
return queue[1]; Sobtz}A*
} L1rwIOgq^
6nc0=~='$
public void remove() { z9 O~W5-U
SortUtil.swap(queue,1,size--); Mxo6fn6-46
fixDown(1); U7E
} o_sQQF
file://fixdown y86))
private void fixDown(int k) { 0D<TF>M;pn
int j; V`by*s
while ((j = k << 1) <= size) { #XcU{5Qm5
if (j < size %26amp;%26amp; queue[j] j++; -/zp&*0gcx
if (queue[k]>queue[j]) file://不用交换 <>]1Y$^Y
break; 3B;}j/h2
SortUtil.swap(queue,j,k); 3I]Fdp)'
k = j; '[Xl>Z[
} 2yvVeo&3
} |gW
private void fixUp(int k) { 6%E~p0)i%
while (k > 1) { o*-9J2V=J
int j = k >> 1; mW~P!7]
if (queue[j]>queue[k]) pr$~8e=c
break; :&9TW]*g
SortUtil.swap(queue,j,k); Xk?R mU6
k = j; 9s(i`RTM
} [A]Ca$':
} JD ]OIh
Pr`s0J%m
} S.W^7Ap
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} (8G$(MK
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SortUtil： %l]Rh/VPn?
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package org.rut.util.algorithm; ]-:1se
1A^1@^{m'
import org.rut.util.algorithm.support.BubbleSort; iX%n0i
import org.rut.util.algorithm.support.HeapSort; DT\ym9
import org.rut.util.algorithm.support.ImprovedMergeSort; ' S,2
import org.rut.util.algorithm.support.ImprovedQuickSort; q$T8bh,2
import org.rut.util.algorithm.support.InsertSort; DvYwCgLR
import org.rut.util.algorithm.support.MergeSort; *T1~)z}j<
import org.rut.util.algorithm.support.QuickSort; @\jQoaLT$_
import org.rut.util.algorithm.support.SelectionSort; I+" lrU
import org.rut.util.algorithm.support.ShellSort; 5)`h0TK
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/** !y. $J<
* @author treeroot /H)Br~ l
* @since 2006-2-2 63M=,0-Qt
* @version 1.0 #tDW!Xv?
*/ QPs:RhV7
public class SortUtil { [7.agI@=
public final static int INSERT = 1; YE\K<T jH
public final static int BUBBLE = 2; :u/mTZDi
public final static int SELECTION = 3; Ri @`a
public final static int SHELL = 4; xA #H0?a]
public final static int QUICK = 5; .6m_>Y6
public final static int IMPROVED_QUICK = 6; x8\<qh*:
public final static int MERGE = 7; "SR5wr
public final static int IMPROVED_MERGE = 8; X#ZgS!Mn
public final static int HEAP = 9; L/i(KF{
6P*O&1hv
public static void sort(int[] data) { 4pPI'd&/7
sort(data, IMPROVED_QUICK); /g76Hw>H
} 7&+Ys
private static String[] name={ `R+,1"5=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" aWGon]2p
}; 1'O0`Me>#
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private static Sort[] impl=new Sort[]{ @Y-TOCadT
new InsertSort(), 0^&!6R
new BubbleSort(), Z0*%Rq
new SelectionSort(), <kbyZXV@K
new ShellSort(), c1%rV`)]
new QuickSort(), _|zBUrN
new ImprovedQuickSort(), 62\&RRB i
new MergeSort(), x_!ZycEa
new ImprovedMergeSort(), wC` R>)
new HeapSort() .:9s}%Zr
}; wa:0X)KC?
Cq\I''~8
public static String toString(int algorithm){ M_|> kp
return name[algorithm-1]; 'jjb[{g^}}
} euQ.ArF
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public static void sort(int[] data, int algorithm) { cdTsRS;E
impl[algorithm-1].sort(data); s|-FH X
} yPgmg@G@/
fn}UBzED\
public static interface Sort { T):SGW
public void sort(int[] data); !')y&7a~
} ;t(f1rPyE
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public static void swap(int[] data, int i, int j) { ~?U*6P)o
int temp = data; 50~K,Jx6B
data = data[j]; CxF-Z7 '
data[j] = temp; P Sx304
} [j9E pi(
} BfmsMW