[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; |PW.CV0,
} C-L["O0[
int i1=l; M9dUo7
int i2=mid+1; sBWLgJz?C
for(int cur=l;cur<=r;cur++){ N^By#Z
if(i1==mid+1) "%{J$o
data[cur]=temp[i2++]; #wZBWTj.
else if(i2>r) uHpSE?y/
data[cur]=temp[i1++]; Ke,$3Yx
else if(temp[i1] data[cur]=temp[i1++]; rTLo6wI
else isV9nWo$
data[cur]=temp[i2++]; 1M/_:UH`
} /km'#f)/
} $eUJd Aetk
**lT 'D
} YNWAef4
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改进后的归并排序: FQ6{NMz,h
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package org.rut.util.algorithm.support; Zk75GC
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import org.rut.util.algorithm.SortUtil; <{b#nPc!,#
A;#GU`
/** $sR-J'EE!
* @author treeroot CGN:=D<
* @since 2006-2-2 Dh{sVRA
* @version 1.0 <MoKTP-<
*/ @mrGG F
public class ImprovedMergeSort implements SortUtil.Sort { t(?tPt4zp
9<S};I;
private static final int THRESHOLD = 10; :p,DAt}
%.;`0}b
/* K=X13As_
* (non-Javadoc) NKS-G2Y<P
* b py576GwA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )nJh) {4\
*/ (xhV>hsA
public void sort(int[] data) { dGBVkb4]T
int[] temp=new int[data.length]; >J No2
mergeSort(data,temp,0,data.length-1); Af_yb`W?
} q(cSHHv+
)rFcfS+/
private void mergeSort(int[] data, int[] temp, int l, int r) { dTW3mF4=
int i, j, k; q2KWSh5
int mid = (l + r) / 2; EkEU}2
if (l == r) pUXszPf
return; b(.,Ex]
if ((mid - l) >= THRESHOLD) orzy&4
mergeSort(data, temp, l, mid); o{wXq)b
else X:Z*7P/
insertSort(data, l, mid - l + 1); X[up$<
if ((r - mid) > THRESHOLD) $S _VR
mergeSort(data, temp, mid + 1, r); a4iq_F#NF
else 4P\?vz"
insertSort(data, mid + 1, r - mid); .8.LW4-ff
xnm!$ $W
for (i = l; i <= mid; i++) { G.#sX
temp = data; \@i4im@%xU
} dF/HKBJ
for (j = 1; j <= r - mid; j++) { 4Sxt<7[f
temp[r - j + 1] = data[j + mid]; =ADdfuKN
} L 2:N@TP
int a = temp[l]; RTR@p =ck
int b = temp[r]; )w3HC($g
for (i = l, j = r, k = l; k <= r; k++) { 5L8)w5
if (a < b) { zL,B?
data[k] = temp[i++]; $"G=r(MW
a = temp; EZvf\s>LT
} else { qkbxa?&X
data[k] = temp[j--]; )0W-S9e<
b = temp[j]; urK[v
} :pZWFJ34{
} @on\@~Ug
} 5*W<6ia
F ak"u'~
/** =`MU*Arcs[
* @param data v{dvB:KP5X
* @param l pl.K*9+
* @param i %+,7=Wt-
*/ &=d0'3k>
private void insertSort(int[] data, int start, int len) { 1SYBq,[])
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9L^:N)-
} >^fkHbgNQ
} a9CK4Kg
} $yA2c^QS
} !?~>f>js_l
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堆排序： ~HH6=qjU)
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package org.rut.util.algorithm.support; 4dwG6-
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import org.rut.util.algorithm.SortUtil; #I(Ho:b
J_=42aHO
/** M)1?$'Aq
* @author treeroot T8ftBIOi
* @since 2006-2-2 uqg#(ADy?R
* @version 1.0 Px<*n '~}
*/ zz1e)W/
public class HeapSort implements SortUtil.Sort{ ]VU a$$
g,N"o72)
/* (non-Javadoc) Mmu>&C\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7u9!:}Tu
*/ Y79{v nlGk
public void sort(int[] data) { X( H-U q*(
MaxHeap h=new MaxHeap(); g^dPAjPQ
h.init(data); zsZP\
for(int i=0;i h.remove(); $stBB
System.arraycopy(h.queue,1,data,0,data.length); _Bh ^<D-
} qd7 86~
yA/b7x-c
private static class MaxHeap{ 9. 7XRxR^
X-&U-S;
void init(int[] data){ *mgK^9<
this.queue=new int[data.length+1]; |rDv!m
for(int i=0;i queue[++size]=data; 0Q1sJDa.
fixUp(size); </OZ,3J=
} dfmxz7V
} 0rtP :Nj$
ZKv^q%92
private int size=0; )+nY-DB(
x*" 0dYH
private int[] queue; LS=HX~5C
P;#}@/E
public int get() { Uu9*nH_
return queue[1]; &u_s*
} UaQR0,#0y
M@n9i@UsO
public void remove() { 3 oG5E"G
SortUtil.swap(queue,1,size--); -R[ *S "
fixDown(1); (\QkXrK
} Ris5)*7
file://fixdown g`}+K U
private void fixDown(int k) { QQ5G?E
int j; ,KMt9<
while ((j = k << 1) <= size) { %S<0l@=5`l
if (j < size %26amp;%26amp; queue[j] j++; _Co*"hl>2
if (queue[k]>queue[j]) file://不用交换 +s}"&IV%
break; Q599@5aS
SortUtil.swap(queue,j,k); u5,\Kz
k = j; ?y\gjC6CNG
} `~bnshUk
} 2^}E!(<
private void fixUp(int k) { *[(}rpp M
while (k > 1) { y3 R+060\3
int j = k >> 1; L;7x2&
if (queue[j]>queue[k]) T-: @p>
break; @@,l0/
SortUtil.swap(queue,j,k); 1HF=,K+
k = j; g?'4G$M
} $LLy#h?V]
} >^8=_i !
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} jORU+g
Z>)(yi9+
} p#~Dq(Q
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SortUtil： Q.q'pJ-
ccUq!1
package org.rut.util.algorithm; ?3Ytn+Py
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import org.rut.util.algorithm.support.BubbleSort; Qz+hS\yx
import org.rut.util.algorithm.support.HeapSort; HbRDa
import org.rut.util.algorithm.support.ImprovedMergeSort; p/4\O
import org.rut.util.algorithm.support.ImprovedQuickSort; vpoeK'bi,
import org.rut.util.algorithm.support.InsertSort; cMCGaaLU
import org.rut.util.algorithm.support.MergeSort; V Q6&7@ c
import org.rut.util.algorithm.support.QuickSort; <$^76=x,8P
import org.rut.util.algorithm.support.SelectionSort; z*cC2+R}=
import org.rut.util.algorithm.support.ShellSort; XNwZSW
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/** ]*8K4n G
* @author treeroot .Y8z3O
* @since 2006-2-2 f_*Bd.@
* @version 1.0 1N#KVvK
*/ ~Bll\3-=
public class SortUtil { BcMgfa/
public final static int INSERT = 1; .e $W(}
public final static int BUBBLE = 2; akuV9S
public final static int SELECTION = 3; M(l>^N8W8
public final static int SHELL = 4; HQ8oOn
public final static int QUICK = 5; nQ/R,+6h
public final static int IMPROVED_QUICK = 6; fh0a "#L{
public final static int MERGE = 7; pq 4/>WzE
public final static int IMPROVED_MERGE = 8; $"d< F3k
public final static int HEAP = 9; 2L#$WuM~^
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public static void sort(int[] data) { hJavi>374
sort(data, IMPROVED_QUICK); < sJ
} (p2jigP7a[
private static String[] name={ XY[uyR4Z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vI<n~FHt
}; >a@c5
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private static Sort[] impl=new Sort[]{ ^Z:oCTOP
new InsertSort(), W0]W[b,:u$
new BubbleSort(), 2]Nc@wX`p
new SelectionSort(), CS;bm`8a
new ShellSort(), [ 7W@/qqv
new QuickSort(), nu1s
new ImprovedQuickSort(), tpJe1J<
new MergeSort(), YQyf:xJ
new ImprovedMergeSort(), ~kdxJP"
new HeapSort() 2|xNT9RW
}; rZ0+mS'/G
<,%qt_ !
public static String toString(int algorithm){ W}<'Y@[,
return name[algorithm-1]; lg)jc3
} (mHCK5
481SDG[b
public static void sort(int[] data, int algorithm) { `K.2&6xc
impl[algorithm-1].sort(data); 0XCtw6
} B'( /W@
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public static interface Sort { p`@7hf|hm
public void sort(int[] data); c#?JW:^|Df
} j'#Y$d1.
LTGKs^i4
public static void swap(int[] data, int i, int j) { kY8aK8M
int temp = data; /Ulv/Thl
data = data[j]; 4ZY0!'be-R
data[j] = temp; ,qF;#nB-
} g5gq{KlU
} iXp*G52