[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; `lezJ(Xm
} 7O{O')o!
int i1=l; 89#0vG7m
int i2=mid+1; =e8L7_;
for(int cur=l;cur<=r;cur++){ M2Fj)w2
if(i1==mid+1) M.N~fSJ
data[cur]=temp[i2++]; wKS-O%?
else if(i2>r) gam#6 s
data[cur]=temp[i1++]; &MZy;Sq
else if(temp[i1] data[cur]=temp[i1++]; lN>C#e<]
else `Uj?PcS_
data[cur]=temp[i2++]; )NmlV99q
} uE#,c\[8
} g)?g7{&?>?
TTZxkK
} F*JvpI[7n
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改进后的归并排序: !aw#',r8m
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package org.rut.util.algorithm.support; S50x0$%<W
@PoFxv
import org.rut.util.algorithm.SortUtil; fCf#zV[
K}E7|gdG
/** A:bPIXb
* @author treeroot .n& Cq+U;
* @since 2006-2-2 zB6u-4^wT
* @version 1.0 ~/jxB)t
*/ \y H3Y
public class ImprovedMergeSort implements SortUtil.Sort { /E{dM2
4[,B;7
private static final int THRESHOLD = 10; koEX4q
UcLNMn|
/* IgVo%)n
* (non-Javadoc) }pE~85h4M
* G</I%qM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vV6Lp
*/ SU%rWH
public void sort(int[] data) { K+@eH#Cv,(
int[] temp=new int[data.length]; ]8m_*I!
mergeSort(data,temp,0,data.length-1); fHe0W
} FL#g9U>
Ly)(_Tp@+
private void mergeSort(int[] data, int[] temp, int l, int r) { A` o?+2s_
int i, j, k; ;j>Vt?:Pw
int mid = (l + r) / 2; _m7U-;G
if (l == r) grCO-S|j^
return; (!VMnLlXRK
if ((mid - l) >= THRESHOLD) OVUs]uK
mergeSort(data, temp, l, mid); Xm8Z+}i
else I51oG:6fR?
insertSort(data, l, mid - l + 1); J(EaE2
if ((r - mid) > THRESHOLD) X(y
mergeSort(data, temp, mid + 1, r); YF! &*6m
else JU'WiR bcb
insertSort(data, mid + 1, r - mid); d]7|v r]
6/mkJj+"
for (i = l; i <= mid; i++) { |ON&._`LH
temp = data; -4?xwz9o$7
} G=C5T(
for (j = 1; j <= r - mid; j++) { ^0Q=#p
temp[r - j + 1] = data[j + mid]; Q\27\2
} C^/ -lc
int a = temp[l]; lbB.*oQ
int b = temp[r]; %]chL.s
for (i = l, j = r, k = l; k <= r; k++) { m+Q5vkW
if (a < b) { Cv>yAt.3
data[k] = temp[i++]; 3_L1Wm
a = temp; xz"Z3B
} else { ^)OZ`u8
data[k] = temp[j--]; r}oURy,5
b = temp[j]; `&u<aLA
} MjQ[^%lfL
} QOT)x4!)
} Z#4JA/c!
r*6"'W>c6
/** ;V(H7 ZM
* @param data ){+[$@9
* @param l a IpPL8a
* @param i KbwTj*k[
*/ kUn2RZ6$#
private void insertSort(int[] data, int start, int len) { 2#AeN6\@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7`blGzP_
} }iua] 4|
} 9u?)vR[@e
} NV}RRs
} =de<WoKnu2
+z:CZ(fb
堆排序： "YG\
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package org.rut.util.algorithm.support; (ve+,H6w\
qnq%mwDeD
import org.rut.util.algorithm.SortUtil; mW~i c
u/gm10<OWa
/** =PNdP
* @author treeroot ]{IR&{EI-
* @since 2006-2-2 lx{.H,1~
* @version 1.0 &GdL 9!hH
*/ r]k*7PK
public class HeapSort implements SortUtil.Sort{ B*?ZE4`
Hva2j<h
/* (non-Javadoc) &l.x:eD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5-8]N>/b!
*/ `*e4m
public void sort(int[] data) { 6R;)
MaxHeap h=new MaxHeap(); C9<4~IM w
h.init(data); -6rf( ER
for(int i=0;i h.remove(); xClRO,-
System.arraycopy(h.queue,1,data,0,data.length); r=fE8[,
} ta&Q4v&-
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private static class MaxHeap{ &sm @
7$(_j<o`
void init(int[] data){ 'FShNY5
this.queue=new int[data.length+1]; t|;%DA)fjw
for(int i=0;i queue[++size]=data; j\2]M
fixUp(size); |EF>Y9
} 8#+`9GI
} wL'oImE
94Xjz(
private int size=0; `[WyHO|8
j#N(1}r=1
private int[] queue; }*iAE>;
89zuL18V
public int get() { OuB2 x=B
return queue[1]; z*6$&sS\>
} ZV!R#Xv
MWM +hk1fs
public void remove() { |]^l^e6m
SortUtil.swap(queue,1,size--); |vv]Z(_
fixDown(1); fC_zX}3
} x.I][(}
file://fixdown kr^0% A
private void fixDown(int k) { G9\EZ\x!
int j; '.pgXsC:=?
while ((j = k << 1) <= size) { D899gGe
if (j < size %26amp;%26amp; queue[j] j++; 43KaL(
if (queue[k]>queue[j]) file://不用交换 FyCBNtCv
break; e\`wlaP,
SortUtil.swap(queue,j,k); z~F37]W3[
k = j; {3_Gjb5\\4
} Jf2e<?`
} mv{<'
private void fixUp(int k) { s~L`53A
while (k > 1) { $( S*GF$S
int j = k >> 1; .+OB!'dDK^
if (queue[j]>queue[k]) rB,ldy,f
break; >gr<^$
SortUtil.swap(queue,j,k); C?,*U
k = j; 8+9\7*
} TZe+<~4*i%
} wY/bA}%
JlUb0{8PE
} vyE{WkZxR
5\WUoSgy
} WhH!U0
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SortUtil： Q.yb4
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package org.rut.util.algorithm; *m*`}9
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import org.rut.util.algorithm.support.BubbleSort; CA/ -Gb
import org.rut.util.algorithm.support.HeapSort; E-^2"j>o
import org.rut.util.algorithm.support.ImprovedMergeSort; 2SYKe$e
import org.rut.util.algorithm.support.ImprovedQuickSort; EOhC6>ATh
import org.rut.util.algorithm.support.InsertSort; [O\9 9>
import org.rut.util.algorithm.support.MergeSort; "9w}dQ
import org.rut.util.algorithm.support.QuickSort; &I%IaNco
import org.rut.util.algorithm.support.SelectionSort; -OWZ6#v(
import org.rut.util.algorithm.support.ShellSort; #*^e,FF<
\Dfm(R
/** cM3jnim
* @author treeroot 0*/kGvw`i
* @since 2006-2-2 +,z)#
* @version 1.0 $%=G[/i'
*/ 8&%Cy'TIz4
public class SortUtil { JRXRi*@
public final static int INSERT = 1; Apmw6cc
public final static int BUBBLE = 2; K U$`!h
public final static int SELECTION = 3; SyAo, )j
public final static int SHELL = 4; E4=qh1d
public final static int QUICK = 5; n&$/Q$d&
public final static int IMPROVED_QUICK = 6; Bhe{L?}0
public final static int MERGE = 7; 4Ac}(N5D@
public final static int IMPROVED_MERGE = 8; )9B:Y;>)
public final static int HEAP = 9; FNC[59
1eHe~p ,
public static void sort(int[] data) { i3P9sdTD
sort(data, IMPROVED_QUICK); Hs$'0:
} ~q 7;8<U
private static String[] name={ q4/909x=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" UA0F):
}; tF^g<)S;t
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private static Sort[] impl=new Sort[]{ /D'M24
new InsertSort(), J:AMnUOcDi
new BubbleSort(), @MOCug4
new SelectionSort(), xz8G}Ku
new ShellSort(), FIS "Z(
new QuickSort(), l[oe*aYN7
new ImprovedQuickSort(), Lc|{aN
new MergeSort(), P6.!3%y
new ImprovedMergeSort(), q*bt4,D&Es
new HeapSort() tb,9a!?
}; P\AqpQv
t+O e)Ns
public static String toString(int algorithm){ ,:UX<6l R
return name[algorithm-1]; q_sEw~~@!
} %m`zWg-
lI6W$V\,
public static void sort(int[] data, int algorithm) { &n>7Ir
impl[algorithm-1].sort(data); n'M>xq_
} o/^1Wm=
:^#vxdIC?
public static interface Sort { )c+k_;t'+
public void sort(int[] data); DW>ES/B8$(
} Z7z]2v3}c
8I.VJ3Q
public static void swap(int[] data, int i, int j) { ,F9nDF@)
int temp = data; &I/qG`W
data = data[j]; 2.nE k
data[j] = temp; <*wM=aq
} 8{ gXToK
} psUE!~9,