[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; !<MW*7P=
} =DXvt5G
int i1=l; IctLhYZ
int i2=mid+1; ]lzOz<0q
for(int cur=l;cur<=r;cur++){ Z(fhH..T`
if(i1==mid+1) 8^dsx1U#
data[cur]=temp[i2++]; z50f$!?
else if(i2>r) *g/@-6
data[cur]=temp[i1++]; 2E}^'o
else if(temp[i1] data[cur]=temp[i1++]; VEg/x z4c
else @5(HRd
data[cur]=temp[i2++]; `pd1'5Hm
} ;V3d"@R,
} `o!a RX
p=J9N-EM
} ,<?M/'4}G
a fhZM$
改进后的归并排序: "Q<*H<e
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package org.rut.util.algorithm.support; yj{:%Km:`
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import org.rut.util.algorithm.SortUtil; MHKB:t]hA
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/** )d-{#
* @author treeroot tc<t%]c
* @since 2006-2-2 )?PRG=
* @version 1.0 UQ 'U 4q
*/ R|H_F#eVn}
public class ImprovedMergeSort implements SortUtil.Sort { \:wLUGFl5
\ g[A{
private static final int THRESHOLD = 10; 6WnGP>tc.
?YbZVoD)J
/* ss>?fyA
* (non-Javadoc) uP[:P?,t
* XD\Z$\UJE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L #l|}u
*/ & A<Pf.Us
public void sort(int[] data) { yLlAK,5P0o
int[] temp=new int[data.length]; +,$"%C
mergeSort(data,temp,0,data.length-1); _Uz}z#jt
} CVFsp>+
kpN'H_ .
private void mergeSort(int[] data, int[] temp, int l, int r) { q<cpU'-#
int i, j, k; )ozN{&B6
int mid = (l + r) / 2; 0Ti>PR5M
if (l == r) #i GRi!$h
return; &Wup 7
if ((mid - l) >= THRESHOLD) {m%X\s;ni
mergeSort(data, temp, l, mid); ".SQ*'Oc
else 6Pa jBEF
insertSort(data, l, mid - l + 1); QP e}rQnm
if ((r - mid) > THRESHOLD) \;A\ vQ[
mergeSort(data, temp, mid + 1, r); D0&{iZ(
else z[wk-a+w
insertSort(data, mid + 1, r - mid); Kv:ih=?
Zb7:qe<UN
for (i = l; i <= mid; i++) { $0zH2W
temp = data; gZs8BKO
} (7rG~d1iS
for (j = 1; j <= r - mid; j++) { lFY;O !Y5\
temp[r - j + 1] = data[j + mid]; f V.(v&
} wFaWLC|&
int a = temp[l]; N7xkkAS{
int b = temp[r]; JZQ$*K
for (i = l, j = r, k = l; k <= r; k++) { ^OQ#Nz
if (a < b) { lA<IcW
data[k] = temp[i++]; W$Bx?}x($
a = temp; P( W8XC
} else { o;JBe"1
data[k] = temp[j--]; I -obfyije
b = temp[j]; jjm-%W@
} u[oYVpe)IG
} &7X0 ;<
} >:`Y]6z
Q=9S?p M
/** .0q %A1H
* @param data [J+K4o8L<A
* @param l "t"=9:_t
* @param i L$x/T3@
*/ `#X{.
private void insertSort(int[] data, int start, int len) { n6nwda
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7j&l2Z
} <_H0Q_/(
} b`K~l'8
} 8X]j;Rb
} z@ A5t4+3
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堆排序： ? F fw'O
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package org.rut.util.algorithm.support; !{SU G+.2
9ffRY,1@
import org.rut.util.algorithm.SortUtil; nx,67u/Pb
fK^FD&sF
/** ki^[~JS>'
* @author treeroot N2tvP+Z6D
* @since 2006-2-2 Y^S0K'N
* @version 1.0 W.n@
*/ R< xxwjt
public class HeapSort implements SortUtil.Sort{ ^LT9t2
+.HQ+`8z]
/* (non-Javadoc) m=fmf(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W9V%Xc`LQ
*/ AJ:@c7:eS
public void sort(int[] data) { $b$r,mc
MaxHeap h=new MaxHeap(); yZFvpw|g
h.init(data); =W !m`
for(int i=0;i h.remove(); lLtC9:
System.arraycopy(h.queue,1,data,0,data.length); ^O\tN\g;c
} aM.l+DP
foE2rV/Y
private static class MaxHeap{ :ykZ7X&
i`8!Vm
void init(int[] data){ :eQxdi'
this.queue=new int[data.length+1]; 3g2t{%
for(int i=0;i queue[++size]=data; ZLKS4
fixUp(size); NM~e
} *vsOL4I%
} B?Y%y@.
p|Rxy"}
private int size=0; hY'"^?OP
dt3Vy*zL
private int[] queue; 9i|6
0#*\o1r\p
public int get() { on&N=TN
return queue[1]; :@b>,{*4zS
} a9jY^E'|n
p7H*Ff`
public void remove() { >Q5E0 !]
SortUtil.swap(queue,1,size--); ^ad> (W
fixDown(1); 6o A0a\G'
} 9R;s;2$.
file://fixdown `(B1 "qRi
private void fixDown(int k) { a/)TJv
int j; u{p\8v%7
while ((j = k << 1) <= size) { $9QVl
if (j < size %26amp;%26amp; queue[j] j++; }>frK#S
if (queue[k]>queue[j]) file://不用交换 \wDOE(>
break; nI_Zk.R
SortUtil.swap(queue,j,k); p-KuCobz]
k = j; 29Q5s$YD@
} [sNn^x
} S-f3rL[?
private void fixUp(int k) { 2,QkktJLo
while (k > 1) { H V
int j = k >> 1; \HK#d1>ox
if (queue[j]>queue[k]) :f/ p5c
break; P<4jY?.
SortUtil.swap(queue,j,k); BTd'bD~EA
k = j; LK:|~UV?
} 6gR=e+
} [[s k
Y?%6af+
} @MB;Ez v
>9u6@
} 5E!|-xD
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SortUtil： / V{w<
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package org.rut.util.algorithm; *iC t4J
B-&J]H
import org.rut.util.algorithm.support.BubbleSort; Cq(Xa-
import org.rut.util.algorithm.support.HeapSort; Y6D=tb
import org.rut.util.algorithm.support.ImprovedMergeSort; x6)
import org.rut.util.algorithm.support.ImprovedQuickSort; RXWjFv~/
import org.rut.util.algorithm.support.InsertSort; e&0B4wVAQ
import org.rut.util.algorithm.support.MergeSort; zw5~|<
import org.rut.util.algorithm.support.QuickSort; Le3S;SY&
import org.rut.util.algorithm.support.SelectionSort; Aoo'i
import org.rut.util.algorithm.support.ShellSort; BEI/OGp
Gg.w-&
/** v"F0$c
* @author treeroot {YGz=5^
* @since 2006-2-2 ?Y hua9
* @version 1.0 3mm`8!R
*/ IYQYW.`ly
public class SortUtil { Dh9-~}sW'
public final static int INSERT = 1; wyc,Ir
public final static int BUBBLE = 2; q90S>c,
public final static int SELECTION = 3; NI^Y%N
public final static int SHELL = 4; lMm-K%(2
public final static int QUICK = 5; &%*S
public final static int IMPROVED_QUICK = 6; MW4dPoa
public final static int MERGE = 7; PZ ogN
public final static int IMPROVED_MERGE = 8; 93!a
public final static int HEAP = 9; X ]a>
.y\HQ^j
public static void sort(int[] data) { Maa.>2v<
sort(data, IMPROVED_QUICK); c~tSt.^WX
} _N-7H\hF
private static String[] name={ v;RQVH;,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KqS2
}; h?ia4t
+I Ze`M%n
private static Sort[] impl=new Sort[]{ -y\N9
new InsertSort(), eLC&f}
new BubbleSort(), G1nW{vce
new SelectionSort(), i Lm1l
new ShellSort(), ]Z84w!z
new QuickSort(), PCLSY8N
new ImprovedQuickSort(), 9e1 6 g
new MergeSort(), AngECkF-
new ImprovedMergeSort(), -pD&@Wlwak
new HeapSort() `?D_=Gw
}; V!opnLatYS
-DuiK:mp
public static String toString(int algorithm){ *g,?13Q_
return name[algorithm-1]; ZK ?x_`w
} R_N<j
LNN:GD)>
public static void sort(int[] data, int algorithm) { oOL3O@)w>
impl[algorithm-1].sort(data); Z~,.l
} )R +o8C
sTA/2d
public static interface Sort { =3zn Ta }
public void sort(int[] data); @NHRuk+
} &=?`;K
m+m6"yE#_
public static void swap(int[] data, int i, int j) { \Zh)oUHd
int temp = data; __V]HcP;
data = data[j]; z1FbW&V
data[j] = temp; Qr<%rU^{.
} I|j tpv}
} R^2Uh$kk{A