[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; {4g';
} 3x~7N
int i1=l; P~a@{n*8
int i2=mid+1; Q(& @ra!{
for(int cur=l;cur<=r;cur++){ _dKMBcl)E
if(i1==mid+1) 8T1`9ITl:
data[cur]=temp[i2++]; &%2^B[{
else if(i2>r) lHM+<Z
data[cur]=temp[i1++]; p/Pus;*s
else if(temp[i1] data[cur]=temp[i1++]; aC1z.?!U
else (L(7)WbH
data[cur]=temp[i2++]; OxHcoNrz
} nM[yBA
} I=!kPuw
NBk0P*SI
} ?I+{S
hF'VqJS
改进后的归并排序: u@Hz7Q} P
5}%R
package org.rut.util.algorithm.support; 5zK,(cF0-
6kAAdy}ck
import org.rut.util.algorithm.SortUtil; . 1kB8&}
OBWb0t5H?
/** 'I,a 29
* @author treeroot +La2-I
* @since 2006-2-2 uE1;@Dm+
* @version 1.0 )+N{D=YM
*/ o;@~uU
public class ImprovedMergeSort implements SortUtil.Sort { k8?._1t
z"f@iJX?2
private static final int THRESHOLD = 10; U'=8:&
h$8h@2%
/* 6{6hz8
* (non-Javadoc) 'V]C.`9c
* qA>#;UTp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {Z2nc)|7C
*/ CcQc!`YC
public void sort(int[] data) { )0/9 L
int[] temp=new int[data.length]; /9br&s$B
mergeSort(data,temp,0,data.length-1); r^m&<)Ca
} r D@*xMW
6Z|h>H5a
private void mergeSort(int[] data, int[] temp, int l, int r) { 8\s#law
int i, j, k; p7QZn.,=u
int mid = (l + r) / 2; /?;'y,(Q
if (l == r) fXMY.X>f
return; |OeWM
if ((mid - l) >= THRESHOLD) [q|W*[B:@
mergeSort(data, temp, l, mid); C>|.0:[%
else b-ss^UL
insertSort(data, l, mid - l + 1); ==Egy:<:Q
if ((r - mid) > THRESHOLD) '&cH,yc;b
mergeSort(data, temp, mid + 1, r); lp(2"$nQ
else '~Y@HRVL@|
insertSort(data, mid + 1, r - mid); _:[@zxT<x
}U8v ~wcd
for (i = l; i <= mid; i++) { v@EErF
temp = data; 3CD#OCz7&
} yeiIP
for (j = 1; j <= r - mid; j++) { Erw1y,mF
temp[r - j + 1] = data[j + mid]; &dtst??
} )#i@DHt=
int a = temp[l]; >ZJ]yhbhK
int b = temp[r]; 8&U Mmbgy
for (i = l, j = r, k = l; k <= r; k++) { 0si1:+t-[+
if (a < b) { -J3~j kf
data[k] = temp[i++]; *H!BThft4
a = temp; 'LMj.#A<g
} else { rfk{$g
data[k] = temp[j--]; Qyw@ r
b = temp[j]; Y#}qXXZ>]
} 6J>AU
} ]In7%Qb
} [mzed{p]]
KO"/
/** R=~%kt_n
* @param data y"yo\IDW
* @param l 1)k+v17]f5
* @param i m[eqTh4*
*/ -6+7&.A+
private void insertSort(int[] data, int start, int len) { x`g,>>&C
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $z[S0Cm
} +(2$YJ35
} 1_t+lJI9j
} OjhX:{"59
} H^|TV]^;N
Ah1 9#0
堆排序： t#"0^$l=
joI)6c
package org.rut.util.algorithm.support; <\O+
-)(5^OQ
import org.rut.util.algorithm.SortUtil; X&WP.n)
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/** fHd[8{;P:
* @author treeroot 5QiQDQT}5
* @since 2006-2-2 !'H$08Ql}
* @version 1.0 hdDT'+
*/ '4uu@?!dVk
public class HeapSort implements SortUtil.Sort{ i2Wvu3,D3-
c*rH^Nz
/* (non-Javadoc) di/QJrw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R `ViRJh
*/ #csP.z3^y
public void sort(int[] data) { Dnd; N/9
MaxHeap h=new MaxHeap(); 0BDw}E\
h.init(data); T3fQ #p
for(int i=0;i h.remove(); (ODwdN7;
System.arraycopy(h.queue,1,data,0,data.length); JwbZ`Z*w
} !p+54w\ 2
4-.W~C'Q
private static class MaxHeap{ WGz)-IB!PE
k&ooV4#f6
void init(int[] data){ +51heuu[o
this.queue=new int[data.length+1]; ?=9'?K/~a
for(int i=0;i queue[++size]=data; 4`i8m
fixUp(size); )I&.6l!#
} ~)f^y!PMQ
} p XXf5adl<
,jRAVt+{N
private int size=0; nsI+04[F
Mw0>p5+ cy
private int[] queue; k7iko{5D
|^l_F1+w
public int get() { {V/>5pz4e
return queue[1]; \Wfw\x0.
} ES4Wtc)&
^:-GPr
public void remove() { 6C&&="uww
SortUtil.swap(queue,1,size--); <kFLwF?PM'
fixDown(1); [eD0L71[
} =|-=4.b+|
file://fixdown l^&#9d
private void fixDown(int k) { B,\VLX
int j; t}eyfflZ
while ((j = k << 1) <= size) { %]Z4b;W[Y
if (j < size %26amp;%26amp; queue[j] j++; '{AB{)1
if (queue[k]>queue[j]) file://不用交换 ZjmQ
break; ~Fuq{e9`
SortUtil.swap(queue,j,k); XY| y1L 3[
k = j; 44}5o
} f7a4E+}
} gbuh04#~
private void fixUp(int k) { Jx5`0?
while (k > 1) { J>
int j = k >> 1; esJ7#Gxt
if (queue[j]>queue[k]) 1*=ev,Z
break; upuN$4m&{
SortUtil.swap(queue,j,k); zzZEX
k = j; d AcSG
} ]zlA<w8
} hiS|&5#
E@ :9|5
} U=bx30brh%
>SI'Q7k
} M,fL(b;2
n.+'9Fj
SortUtil： wS}c\!@<,
o^/ #i`)
package org.rut.util.algorithm; |@AXW
X6cn8ak3
import org.rut.util.algorithm.support.BubbleSort; [@Ac#
import org.rut.util.algorithm.support.HeapSort; w6s[|i)&
import org.rut.util.algorithm.support.ImprovedMergeSort; 8vVE
import org.rut.util.algorithm.support.ImprovedQuickSort; q2X::Yqk
import org.rut.util.algorithm.support.InsertSort; AfA"QCyO
import org.rut.util.algorithm.support.MergeSort; 1@v<
import org.rut.util.algorithm.support.QuickSort; j+h+Y|4J
import org.rut.util.algorithm.support.SelectionSort; hty'L61\z
import org.rut.util.algorithm.support.ShellSort; fLe~X!#HF
ZoXz@/T
/** n>}Y@{<]/
* @author treeroot `r}_92Tt
* @since 2006-2-2 fc+-/!v
* @version 1.0 <;Hb7p3N
*/ zhw*Bed<
public class SortUtil { B!/kC)bF:
public final static int INSERT = 1; =R=V
public final static int BUBBLE = 2; _BP%@o
public final static int SELECTION = 3; ^f,4=-
public final static int SHELL = 4; 2?~nA2+vm
public final static int QUICK = 5; $YX{gk>
public final static int IMPROVED_QUICK = 6; 6X@z(EEL
public final static int MERGE = 7; 'u<e<hU
public final static int IMPROVED_MERGE = 8; G^Gs/- f
public final static int HEAP = 9; U"7o;q
X_2N9$},
public static void sort(int[] data) { )P(S:x'b0
sort(data, IMPROVED_QUICK); v8-My1toV
} Lw\u{E@
private static String[] name={ } [#8>T
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" NIQ}A-b
}; XKTDBaON
{}$rN@OM$
private static Sort[] impl=new Sort[]{ "\@J0|ppb
new InsertSort(), Ve(<s
new BubbleSort(), zjUQ]
new SelectionSort(), Gt&yz"?D
new ShellSort(), %"f85VfZ
new QuickSort(), 9Q1%+zjjMq
new ImprovedQuickSort(), sg,\!'
new MergeSort(), `&A`&-nc=
new ImprovedMergeSort(), ,w~3K%B4
new HeapSort() 1x_EAHZ>7
}; U:*rlA@_.
:Vxt2@p{
public static String toString(int algorithm){ fDsT@W,K
return name[algorithm-1]; 3?B1oIHQ
} b;VIR,2
''9]`B,:a0
public static void sort(int[] data, int algorithm) { G%sO{k7
impl[algorithm-1].sort(data); 6vK`J"d{~D
} =CFjG)L
OH>.N"IG
public static interface Sort { 9^!.!%6O$
public void sort(int[] data); 9YI@c_1 Q
} ;((t|
'KjH|u
public static void swap(int[] data, int i, int j) { XdJD"|,h
int temp = data; t#.}0Te7
data = data[j]; iOZ9A~Ywy
data[j] = temp; dLYM )-H`>
} ,&,%B|gT]
} 0cG[<\qT