[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; sQT<I]e
} t},71Ry
int i1=l; <J^94-[CF
int i2=mid+1; DXfQy6k'
for(int cur=l;cur<=r;cur++){ wPpern05
if(i1==mid+1) N!13QI H
data[cur]=temp[i2++]; `W4Is~VVv
else if(i2>r) 6yMaW eT
data[cur]=temp[i1++]; K)9f\1\
else if(temp[i1] data[cur]=temp[i1++]; V_T~5%9Fy
else qWI8 >my11
data[cur]=temp[i2++]; *BQy$dfE
} Aj@t*3
} Qf|c^B
IHe?/oUL"b
} *GM.2``e
;vgaFc]
改进后的归并排序: \B8[UZA.&
2!}rHw
package org.rut.util.algorithm.support; nsi&r
f_> lz
import org.rut.util.algorithm.SortUtil; eo4v[V&
p4lB#
/** `AhTER
* @author treeroot 4J2C#Cs
* @since 2006-2-2 O4,?C)
* @version 1.0 uq@_DPA7
*/ HQrx9CXE
public class ImprovedMergeSort implements SortUtil.Sort { 7]8apei|
Qx77%L4
private static final int THRESHOLD = 10; vi0nJ -Xg
qLm g18
/* wmFS+F4`2
* (non-Javadoc) FJ O-p
* @5TJ]=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2Xp?O+b#"O
*/ A)D1 #,0
public void sort(int[] data) { ;d||u
int[] temp=new int[data.length]; -@`!p
mergeSort(data,temp,0,data.length-1); f_tC:T4a
} ~a.ei^r
O@,9a~Ghd
private void mergeSort(int[] data, int[] temp, int l, int r) { :-1 i1d
int i, j, k; mbO.Kyfen
int mid = (l + r) / 2; CrEC@5j
if (l == r) K=;oZYNd
return; 9AZpvQ
if ((mid - l) >= THRESHOLD) oF(|NS^
mergeSort(data, temp, l, mid); UN`O*(k[
else rs:a^W5t
insertSort(data, l, mid - l + 1); SR {KL#NC
if ((r - mid) > THRESHOLD) LW+^m6O
mergeSort(data, temp, mid + 1, r); hN.{H:skL)
else lNqF@eCT9
insertSort(data, mid + 1, r - mid); CWM_J9f
7bx!A+, t
for (i = l; i <= mid; i++) { %x|0<@b7-
temp = data; UoKXo*W2
} Wj31mV
for (j = 1; j <= r - mid; j++) { Z66q0wR7
temp[r - j + 1] = data[j + mid]; nSh}1Arp/
} +:m'
int a = temp[l]; ?h'd\.j{
int b = temp[r]; FFID<Lf/2
for (i = l, j = r, k = l; k <= r; k++) { ?-9It|R
if (a < b) { 0o-KjX?kP
data[k] = temp[i++]; qX!P:M
a = temp; .06[*S
} else { |1^ !rHg
data[k] = temp[j--]; kY`L[1G$
b = temp[j]; ]"4\]_?r
} _tpqo>
} m}?(c)ST
} +`Ypc
"A,-/~cBV
/** F<A[S"
* @param data c~iAjq+c
* @param l +umVl
* @param i by0M(h
*/ [f\TnXq24
private void insertSort(int[] data, int start, int len) { =9#cf-?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); R(N5K4J
} X2hyxTOp
} uvj`r5ei
} \Dr?}D
} ".T&nS[z
YCEdt>5PA
堆排序： <GRrw
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package org.rut.util.algorithm.support; Y+UM>
SFx|9$hXm
import org.rut.util.algorithm.SortUtil; UBvea(z-#
C.oC@P
/** u.L{3gkT
* @author treeroot zQ~8(E]Rf
* @since 2006-2-2 uPveAK}h
* @version 1.0 q3-V_~5^/z
*/ H8'_.2vwX
public class HeapSort implements SortUtil.Sort{ QAmb_:^"d
)Y@mL/_
/* (non-Javadoc) l|p \8=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?:XbZ"25pJ
*/ ZF6?N?t}h8
public void sort(int[] data) { HCTjFW>C
MaxHeap h=new MaxHeap(); o&b1-=MC2
h.init(data); cq \()uF'c
for(int i=0;i h.remove(); p8a\> {
System.arraycopy(h.queue,1,data,0,data.length); @80Z@Pj
} Pn|*(sTl
i?1g{JW
private static class MaxHeap{ }qOj^pkJ
rkz_h
void init(int[] data){ V[T`I a\
this.queue=new int[data.length+1]; Auz.wes
for(int i=0;i queue[++size]=data; p?,:
fixUp(size); r^|AiYI)
} ?go+oS^
} yDW$v/j.|
^+20e3 ~Y
private int size=0; {(MC]]'?
_.y0QkwV
private int[] queue; ^q=D!g
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public int get() { llP 5
return queue[1]; JD}"_,-
} l.Qv9Ll|b
%d/Pc4gfc
public void remove() { w0iv\yIRQ
SortUtil.swap(queue,1,size--); HKZD*E((
fixDown(1); 7$&3(#!N
} }^np
file://fixdown UBy< vwnU
private void fixDown(int k) { PtT=HvP!k
int j; g1s\6%g
while ((j = k << 1) <= size) { N-4k 9l1
if (j < size %26amp;%26amp; queue[j] j++; * vMNv
if (queue[k]>queue[j]) file://不用交换 6(uK5eD(!n
break; UfUboxT
SortUtil.swap(queue,j,k); $<(FZb=
k = j; Zw`vPvb!
} ;>duY\$<
} !$i*u-%4
private void fixUp(int k) { &58+-jzW
while (k > 1) { z]Dbca1a`
int j = k >> 1; tuF hPqe {
if (queue[j]>queue[k]) %@jL?u
break; *>a+`|[1*
SortUtil.swap(queue,j,k); <cn{S`
k = j; b=Y:`&o=[
} ~:\QC
} #gL$~.1
|/R)FT#i
} W%xg;uzp
MWxv\o
} Mr3;B+S
,#FK3;U
SortUtil： }bxW@(bs
8;C_@
package org.rut.util.algorithm; x!08FL)
lnk`D(>W
import org.rut.util.algorithm.support.BubbleSort; Gz9w1[t
import org.rut.util.algorithm.support.HeapSort; [o0Z;}fU
import org.rut.util.algorithm.support.ImprovedMergeSort; CAhkv0?8
import org.rut.util.algorithm.support.ImprovedQuickSort; Gw5j6
import org.rut.util.algorithm.support.InsertSort; _*SA_.0
import org.rut.util.algorithm.support.MergeSort; Gw/imXL
import org.rut.util.algorithm.support.QuickSort; !6UtwCVR
import org.rut.util.algorithm.support.SelectionSort; o`8dqP
import org.rut.util.algorithm.support.ShellSort; K2u$1OKv
e /4{pe+,
/** !u0qF!/W
* @author treeroot lo%:$2*'p
* @since 2006-2-2 nK"XyZ&
* @version 1.0 u&!QP4$"z
*/ 2$MIA?A"Y
public class SortUtil { vIi#M0@N
public final static int INSERT = 1; 5ZRO{rf
public final static int BUBBLE = 2; MifPZQ
public final static int SELECTION = 3; \[Dxg`;4
public final static int SHELL = 4; IU8/B+hM~
public final static int QUICK = 5; $H9+>Z0(
public final static int IMPROVED_QUICK = 6; b`=\<u8
public final static int MERGE = 7; %ifq4'?Z
public final static int IMPROVED_MERGE = 8; vyt$
public final static int HEAP = 9; *P#okwp
wap@q6fz<
public static void sort(int[] data) { f<`is+"
sort(data, IMPROVED_QUICK); $ {iV]Xt
} 4|9c+^%^
private static String[] name={ .%D9leiRe
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /~49.}yt
}; q^e4
9D2}heTN
private static Sort[] impl=new Sort[]{ Tq r]5
new InsertSort(), gRk%ObJGqm
new BubbleSort(), |-W7n'n
new SelectionSort(), OKo39 A\fu
new ShellSort(), xMAfa>]{n
new QuickSort(), Iq@:n_~
new ImprovedQuickSort(), >>**n9\q
new MergeSort(), f#s /Ycp+
new ImprovedMergeSort(), fI5]ed eS
new HeapSort() ]ZQ3|ZJ?<
}; |]dA`e&y
x2|YrkGv
public static String toString(int algorithm){ :3z`+5Y*
return name[algorithm-1]; ~JJuM
} GvL)SVv?
E,F'k2yU
public static void sort(int[] data, int algorithm) { 1 h.=c
impl[algorithm-1].sort(data); )}-,4Iu%
} &B</^:
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public static interface Sort { ;^q@w
public void sort(int[] data); *nv%~t
} L"w% ew
: "|M
public static void swap(int[] data, int i, int j) { V'XmMn)!
int temp = data; I.f)rMl+h
data = data[j]; +J^-B}v
data[j] = temp; z$VA]tI(
} yEnurq%J
} 5Iv3B|u