[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; #Nv)SCc
} 'FC#O%l
int i1=l; }~+_|
int i2=mid+1; 7T/hmVi_
for(int cur=l;cur<=r;cur++){ U%4s@{7
if(i1==mid+1) ATkx_1]KM-
data[cur]=temp[i2++]; )9~-^V0A^>
else if(i2>r) @mm~i~~KA
data[cur]=temp[i1++]; bSm*/Q
else if(temp[i1] data[cur]=temp[i1++]; Cp!Qd e
else ]MaD7q>+R
data[cur]=temp[i2++]; .3:s4=(f
} "jA?s9
} $(N+E,XB
wdLlQD
} +WfO2V.
<-s5 ;xwtS
改进后的归并排序: D]*<J"/]d
q7aH=dhw
package org.rut.util.algorithm.support; $e/[!3CASP
kx6-8j3gD7
import org.rut.util.algorithm.SortUtil; /;V:<mekf
b6ui&Y8z
/** ^hyp}WN
* @author treeroot :#nv:~2]
* @since 2006-2-2 ^#p+#_*V
* @version 1.0 K<~J*k<v
*/ ^/:G`'
public class ImprovedMergeSort implements SortUtil.Sort { 4Tn97G7
?7cT$/4
private static final int THRESHOLD = 10; R|JBzdK+P
|0s)aV|K
/* XFJz\'{
* (non-Javadoc) [l:}#5\]4
* n"|1A..^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vfpK|=[7o
*/ du_TiI
public void sort(int[] data) { WEsX+okj
int[] temp=new int[data.length]; )Bpvi4O
mergeSort(data,temp,0,data.length-1); ?8TIPz J
} BU=;rz!;
oQ/ Dg+Xp
private void mergeSort(int[] data, int[] temp, int l, int r) { 7CV}QV}G
int i, j, k; S0jYk(
int mid = (l + r) / 2; 0;n}{26a
if (l == r) p{W'[A{J .
return; g$9EI\a
if ((mid - l) >= THRESHOLD) %Z!3[.%F
mergeSort(data, temp, l, mid); Rw]lW;EN<
else A#x_>fV
insertSort(data, l, mid - l + 1); 6< @F
if ((r - mid) > THRESHOLD) MwO`DrV
mergeSort(data, temp, mid + 1, r); ~X<Ie9m1x
else Cs?[
insertSort(data, mid + 1, r - mid); Lf0Wc'9{
E`gUNAKQ
for (i = l; i <= mid; i++) { 1# ;`1i
temp = data; a@s@E
} ^7,`6g
for (j = 1; j <= r - mid; j++) { {qbxiL-
temp[r - j + 1] = data[j + mid]; jQ&82X%m
} Msl8o c
int a = temp[l]; tEjT$`6hp
int b = temp[r]; E.%_i8s
for (i = l, j = r, k = l; k <= r; k++) { 6o=Q;Mezl
if (a < b) { 7J[s5'~|
data[k] = temp[i++]; LY1dEZ-)A
a = temp; Jt|W%`X>D
} else { l#^weXSlk
data[k] = temp[j--]; "c*&~GSE4
b = temp[j]; r"_SL!,^
} (^mpb
} _}3NLAqg
} 3JXKpk?
Kp?j\67S
/** >A ?{cbJ
* @param data &N:`Rler
* @param l NhF<2[mt
* @param i {/}p"(^
*/ ~LSD\+
private void insertSort(int[] data, int start, int len) { iiD}2yb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i[40p!~
} *G(ZRj@33
} ~%d*#Yxq
} EB2 5N~7
} b|E1>TkY
*7UDTgY
堆排序： -I*NS6
%h"%G=:
package org.rut.util.algorithm.support; o*Kl`3=]
.XPPd?R
import org.rut.util.algorithm.SortUtil; c(r8 F[4w
eiwPp9[08
/** *Vr;rk
* @author treeroot Xot2L{EIUE
* @since 2006-2-2 +~f5dJyk`
* @version 1.0 1YJ@9*l
*/ I_3{i`g
public class HeapSort implements SortUtil.Sort{ Q5>]f/LD
1,Ji|&Pwf
/* (non-Javadoc) Bl*.N9*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w i=&W
*/ mt*/%>@7R
public void sort(int[] data) { G[ gfD\
MaxHeap h=new MaxHeap(); Zt"3g6S
h.init(data); YT\.${N
for(int i=0;i h.remove(); r"W,G/;h
System.arraycopy(h.queue,1,data,0,data.length); aa,^+^J
} dO|n[/qL0
|nT+W|0U
private static class MaxHeap{ idSc#n22
;`:A(yN]T
void init(int[] data){ /`VrV{\/!
this.queue=new int[data.length+1]; KvkU]s_
for(int i=0;i queue[++size]=data; |$&v)
fixUp(size); dZ%rmTE(H
} {<L|Z=&k`
} '/ *;g#W=
x}X hL
private int size=0; $Eh:m&hq
PpWdZ
private int[] queue; [28Vf"#]
<g'0q*qE
public int get() { x{I, gu|+
return queue[1]; ZZJ<JdD
} .kZ<Q]Vk
-PLh|
public void remove() { MHF7hk ps}
SortUtil.swap(queue,1,size--); tde&w=ec
fixDown(1); F%`O$uXA
} TDZ p1zpXb
file://fixdown DA9f\q
private void fixDown(int k) { 26[m7\O
int j; JYO("f
while ((j = k << 1) <= size) { :BpXi|n;
if (j < size %26amp;%26amp; queue[j] j++; }E&48$0h
if (queue[k]>queue[j]) file://不用交换 FN"Ye*d
break; #Z1 <lAy
SortUtil.swap(queue,j,k); *rv7#!].
k = j; MoMxKmI
} WI\jm&H r
} $[{YE[a
private void fixUp(int k) { 7Kn}KO!Y8
while (k > 1) { uE-|]QQo
int j = k >> 1; W'L
if (queue[j]>queue[k]) I/Q~rVt
break; xa$4P [
SortUtil.swap(queue,j,k); Bf8[(oc~
k = j; f2G 3cg~H
} I,@ 6w
} Tjj-8cg
)UN_,'H/V
} R-OQ(]<*
7p[NuU*Gg
} (%SKTM
)2: ,E
SortUtil： 4v;KtD;M
]Pf!wv
package org.rut.util.algorithm; iKA}??5e
KSxZ4Y
import org.rut.util.algorithm.support.BubbleSort; "T1A$DKw+R
import org.rut.util.algorithm.support.HeapSort; ;>r E+k%_
import org.rut.util.algorithm.support.ImprovedMergeSort; p}(pIoyUF
import org.rut.util.algorithm.support.ImprovedQuickSort; BT*{&'\/
import org.rut.util.algorithm.support.InsertSort; %hN7K
import org.rut.util.algorithm.support.MergeSort; J{e`P;ND
import org.rut.util.algorithm.support.QuickSort; {\ ]KYI0
import org.rut.util.algorithm.support.SelectionSort; lnv&fu`1P
import org.rut.util.algorithm.support.ShellSort; t 4>\;
%eW2w@8]
/** ^17i98w
* @author treeroot ~w"e 2a
* @since 2006-2-2 +r$M 9
* @version 1.0 h_\OtoRa
*/ mV#U=zqb!S
public class SortUtil { ]7J*(,sp
public final static int INSERT = 1; /A1qTG=Br
public final static int BUBBLE = 2; cd]def[d
public final static int SELECTION = 3; A&L2&ofV&q
public final static int SHELL = 4; +XpQ9Cd
public final static int QUICK = 5; cg_j.=M-
public final static int IMPROVED_QUICK = 6; OTD<3Q q
public final static int MERGE = 7; #y*p7~|@
public final static int IMPROVED_MERGE = 8; 5m9;'SF
public final static int HEAP = 9; _E8doV
g-DFcwO,V
public static void sort(int[] data) { [1g
sort(data, IMPROVED_QUICK); s(cC;
} ~$]Puv1V>
private static String[] name={ 5;X3{$y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" qv)%)n
}; g [c^7
{"mb)zr
private static Sort[] impl=new Sort[]{ >N-l2?rE
new InsertSort(), ".sRi
new BubbleSort(), kS<9cy[O
new SelectionSort(), nJcY>Rp?
new ShellSort(), QS%t:,0lp
new QuickSort(), Y%Tm `$^V
new ImprovedQuickSort(), j6#Vwcr
new MergeSort(), To =JE}jzo
new ImprovedMergeSort(), =PYS5\k
new HeapSort() CSlPrx2\
}; |Pq z0n=v
]:svR@E
public static String toString(int algorithm){ q*7:L
return name[algorithm-1]; z,c=."<z
} H-t"Z}
s7s@!~
public static void sort(int[] data, int algorithm) { lX/:e=
impl[algorithm-1].sort(data); wG X\ub#!
} Y{OnW98
Tzr'3m_
public static interface Sort { :&BE-f
public void sort(int[] data); F5%IsAH
} AYv7-!Yk
n7pjj
public static void swap(int[] data, int i, int j) { ]:.9:RmEV
int temp = data; x\5v^$
data = data[j]; %s ">:
data[j] = temp; :|\)=4
} w:/QB-`%
} 2-beq<I