[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; r>o63Q:
} D)L+7N0D~
int i1=l; DGS$Ukz&T
int i2=mid+1; \WxukYH
for(int cur=l;cur<=r;cur++){ 6}d.5^7lr
if(i1==mid+1) o,_?^'@
data[cur]=temp[i2++]; n*2UnKaJ
else if(i2>r) JpXlBEio%
data[cur]=temp[i1++]; hDF@'G8F
else if(temp[i1] data[cur]=temp[i1++]; MF5[lK9e
else wB.&}p9p
data[cur]=temp[i2++]; 0yD9SJn
} k?+?v?I =
} .yz}ROmN^
E=nIRG|g
} vSEuk}pk
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改进后的归并排序: As'=tIro
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package org.rut.util.algorithm.support; <0Xf9a8>
;lE%M
import org.rut.util.algorithm.SortUtil; ?8'*,bK
~"nxE
/** .+$Q<L
* @author treeroot 'Gj3:-xqL
* @since 2006-2-2 9Z4nAc
* @version 1.0 M/b Sud?@%
*/ a<^v(r
public class ImprovedMergeSort implements SortUtil.Sort { ~E17L]ete
6 (]Dh;gC
private static final int THRESHOLD = 10; _852H$H\
p{T*k'
/* y3@H/U{
* (non-Javadoc) s~^5kgPA
* ;r<^a6B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F1*>y
*/ ItNz}4o|d
public void sort(int[] data) { d3\qKL!~
int[] temp=new int[data.length]; pM4 :#%V
mergeSort(data,temp,0,data.length-1); Mk"^?%PxT
} H?yK~bGQ
MTuV^0%jD
private void mergeSort(int[] data, int[] temp, int l, int r) { -|$@-fY;
int i, j, k; bCRV\myd`
int mid = (l + r) / 2; ,E S0NA
if (l == r) C5o#i*|
return; Y]'Z7<U}*E
if ((mid - l) >= THRESHOLD) Va"0>KX
mergeSort(data, temp, l, mid); <^#,_o,!
else ;U/&I3dzV
insertSort(data, l, mid - l + 1); ag [ZW
if ((r - mid) > THRESHOLD) akp-zn&je
mergeSort(data, temp, mid + 1, r); =$'6(aDH
else f6hnTbJ
insertSort(data, mid + 1, r - mid); I|qo+u)
)_HA>o_?C:
for (i = l; i <= mid; i++) { &."iFe
temp = data; -r`.#c4
} u^^[Q2LDU}
for (j = 1; j <= r - mid; j++) { 5_GYrR2
temp[r - j + 1] = data[j + mid]; M\uiq38
} +%<(E
int a = temp[l]; W+I!q:p4H
int b = temp[r]; /:m-> T
for (i = l, j = r, k = l; k <= r; k++) { em%4Ap
if (a < b) { Ni9/}bb
data[k] = temp[i++]; <? q?Mn
a = temp; *#,7d"6W5
} else { n(1l}TJy
data[k] = temp[j--]; @LF,O}[2J
b = temp[j]; R0KPZv-
} ?gA 8x
} )|ju~qbf
} P)Jgs
` Fa~
/** $*^7iT4q_t
* @param data f\|w'
* @param l V'z1
* @param i i1}:8Unxf
*/ G|bT9f$
private void insertSort(int[] data, int start, int len) { f z'@_4hg
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); LBw1g<&
} ^pp\bVh2Q]
} I ce~oz)
} ^9v4OUG
} l!D}3jD
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堆排序： zfJT,h-{
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package org.rut.util.algorithm.support; Z@4Arfl
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import org.rut.util.algorithm.SortUtil; 5AFJC?
k =>oO9`
/** 4>wP7`/+y
* @author treeroot R$R*'l
* @since 2006-2-2 !z\h|wU+
* @version 1.0 \1k79c
*/ Hus)c3Ty7
public class HeapSort implements SortUtil.Sort{ '{cIAw/"n
E^B'4
/* (non-Javadoc) L^1NY3=$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R)c?`:iUB
*/ A#e%^{q$
public void sort(int[] data) { LQ@"Xe]5
MaxHeap h=new MaxHeap(); ;YaQB#GK%
h.init(data); 6fkRrD
for(int i=0;i h.remove(); 0CHH)Bku
System.arraycopy(h.queue,1,data,0,data.length); 5?f ^Rz
} Akq2 d;
NDN7[7E
private static class MaxHeap{ nGC/R&
^}RCoE
void init(int[] data){ %Hu5K>ZNYp
this.queue=new int[data.length+1]; VF+KR*
for(int i=0;i queue[++size]=data; Sj3+l7S?
fixUp(size); p?02C#p
} 2R[:]-b
} aS>u,=C
K%t*8 4j
private int size=0; Kew@&j~
j`EXlc~
private int[] queue; ))qy;Q,
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public int get() { dn&s*
return queue[1]; #NQMy:JHD)
} .j ?W>F
!Z1@}`V&;
public void remove() { 0j^Kgx
SortUtil.swap(queue,1,size--); B`EJb71^Xy
fixDown(1); l5~os>
} d9k0F OR1
file://fixdown zrvF]|1UP
private void fixDown(int k) { )~X2 &^orW
int j; "fb[23g%@k
while ((j = k << 1) <= size) { Q-(zwAaE
if (j < size %26amp;%26amp; queue[j] j++; ~]sc^[
if (queue[k]>queue[j]) file://不用交换 irZ])a
break; 49eD1h3'X[
SortUtil.swap(queue,j,k); |44Ploz2b
k = j; M$wC=b
} R7%#U`Q^A
} +V2F#fI/
private void fixUp(int k) { \UA[
while (k > 1) { (|2t#'m
int j = k >> 1; ."g`3tVK
if (queue[j]>queue[k]) B.=FSow
break; .7J#_*NV
SortUtil.swap(queue,j,k); RTYvS5G
k = j; <3nMx^
} )Om*@;r(
} ~-k9%v`
jVi) Efy
} td$E/h=3
IYv`IS"
} x5pdS:
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SortUtil： 'B|JAi?
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package org.rut.util.algorithm; @@f"%2ZR[
GC-5X`Sq
import org.rut.util.algorithm.support.BubbleSort; .e#w)K
import org.rut.util.algorithm.support.HeapSort; x[p|G5
import org.rut.util.algorithm.support.ImprovedMergeSort; KR}?H#%
import org.rut.util.algorithm.support.ImprovedQuickSort; 9+|$$)
import org.rut.util.algorithm.support.InsertSort; Cp\6W[2+B
import org.rut.util.algorithm.support.MergeSort; poE0{HOU
import org.rut.util.algorithm.support.QuickSort; ~g91Pr
import org.rut.util.algorithm.support.SelectionSort; #<fRE"v:Q
import org.rut.util.algorithm.support.ShellSort; i$Ul(?
cZ,b?I"Q%
/** wLIMv3;k
* @author treeroot soxc0OlN
* @since 2006-2-2 yxPazz
* @version 1.0 2Ah#<k-gC;
*/ 9 ql~q
public class SortUtil { RHW]Z Pr<
public final static int INSERT = 1; AI2)g1m
public final static int BUBBLE = 2; <sbu;dQ`
public final static int SELECTION = 3; )$2QZ qX
public final static int SHELL = 4; hgG9m[?K
public final static int QUICK = 5; M-VX;/&FR
public final static int IMPROVED_QUICK = 6; "nynl'Ryk
public final static int MERGE = 7; 2k~l$p>CN!
public final static int IMPROVED_MERGE = 8; sI=xl
public final static int HEAP = 9; AYBns]!
[jQp~&nY
public static void sort(int[] data) { &u."A3(
sort(data, IMPROVED_QUICK); `7E;VL^Y1
} T=DbBy0-
private static String[] name={ ^dWa;m]l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jVe1b1rt~3
}; bL`TySX
LENq_@$
private static Sort[] impl=new Sort[]{ bIDj[-CDG
new InsertSort(), K-)] 1BG
new BubbleSort(), M)Z7k/=<P
new SelectionSort(), ;fTKfa
new ShellSort(), HQdxL*N%^
new QuickSort(), FjHv
new ImprovedQuickSort(), z_$%-6
new MergeSort(), BKCiIfkZ
new ImprovedMergeSort(), 5Pc;5 o0C
new HeapSort() au(D66VO
}; r8?gD&c}
8 /]S^'>
public static String toString(int algorithm){ :LQYo'@yB
return name[algorithm-1]; l'rja.\
} P= BZ+6DS
?>:g?.+
public static void sort(int[] data, int algorithm) { QE+g j8
impl[algorithm-1].sort(data); /KaZHR.
} b~P`qj[
{ 'eC`04E
public static interface Sort { +.PxzL3?
public void sort(int[] data); ) w5SUb
} g}oi!f$|
?=msH=N<l
public static void swap(int[] data, int i, int j) { /U*C\ xMm
int temp = data; J1U/.`Oy
data = data[j]; q[_VuA]&
data[j] = temp; oH?b}T=9jz
} xj)F55e?
} HyQJXw?A: