[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; R|}N"J_
} 1cv~_jFh
int i1=l; F$(ak;v}
int i2=mid+1; r8@]|`j
for(int cur=l;cur<=r;cur++){ g9q}D-
if(i1==mid+1) O>pv/Ns
data[cur]=temp[i2++]; hVmnXT 3Z
else if(i2>r) &oMWs]0
data[cur]=temp[i1++]; En1LGi4#
else if(temp[i1] data[cur]=temp[i1++]; u -P !2vT
else #gqh0 27
data[cur]=temp[i2++]; /zt M'
} j{YYG|
} xI1{Wo*2C}
c\2rKqFD8
} (T0MWp0
PBnH#zm
改进后的归并排序: 4")`}T
2?GMKd)
package org.rut.util.algorithm.support; }mXYS|{
QOo'Iv+EL
import org.rut.util.algorithm.SortUtil; *Q^z4UY
) jH`lY)1
/** ZaU8eg7
* @author treeroot k`Ifl)
* @since 2006-2-2 -1Dq_!i
* @version 1.0 pd#Sn+&rf
*/ 6_4B!
public class ImprovedMergeSort implements SortUtil.Sort { 7M~sol[*
Nwz?*~1
private static final int THRESHOLD = 10; +x=)Kp>
gT_KOO0n
/* \$ipnQv
* (non-Javadoc) xsB0LUt
* vo`&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O`c50yY
*/ q6)fP4MQ]
public void sort(int[] data) { kFwFPK%B
int[] temp=new int[data.length]; 6ki2/ Q
mergeSort(data,temp,0,data.length-1); ^APtV6g
} EM*I%|n@m
4_kN';a4Q
private void mergeSort(int[] data, int[] temp, int l, int r) { :${tts2g
int i, j, k; Bj1%}B
int mid = (l + r) / 2; R ,qQC<
if (l == r) ];LFv5"
return; |g)C `k
if ((mid - l) >= THRESHOLD) {R!yw`#^B
mergeSort(data, temp, l, mid); TlS? S+
else B-Jd|UE`u
insertSort(data, l, mid - l + 1); sgp.;h'
if ((r - mid) > THRESHOLD) 'RMUjJ-!
mergeSort(data, temp, mid + 1, r); NS[eQ_rT
else %xg+UW }
insertSort(data, mid + 1, r - mid); \vAjg
eBrNhE-[G]
for (i = l; i <= mid; i++) { l(?B0
temp = data; etr-\Cp
} b# N"}-\^
for (j = 1; j <= r - mid; j++) { jmID@37t
temp[r - j + 1] = data[j + mid]; Sf*)Z3f
} 0SIC=p=J
int a = temp[l]; ETdXk&AN
int b = temp[r]; dH^6K0J
for (i = l, j = r, k = l; k <= r; k++) { by@KdQow
if (a < b) { _6NUtU
data[k] = temp[i++]; K3?5bT_{
a = temp; Y<xqws
} else { S/'0czDMW
data[k] = temp[j--]; a;HAuy`M x
b = temp[j]; E5&Z={
} :(n<c
} I}4 PB+yu
} *): |WDR
Cs6`lX >
/** zqeQ
* @param data ZRagM'K
* @param l vA/SrX.
* @param i G)Gp}4gV}
*/ Hb=#`
private void insertSort(int[] data, int start, int len) { $+*nb4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |Kd#pYt%O
} nje7?Vz
} |p6d]#z3
} rwF$aR>9
} iS$[dC ?N
>2s4BV[(
堆排序： }iUK`e
Bu{Kjv
package org.rut.util.algorithm.support; Y!<m8\
W{}$c`,R
import org.rut.util.algorithm.SortUtil; P1eSx#3bR
(9]Uuvfp6"
/** "\b>JV5
* @author treeroot RQ,#TbAe
* @since 2006-2-2 D\Ak-$kJ^
* @version 1.0 QL/KY G
*/ \;{ ]YX
public class HeapSort implements SortUtil.Sort{ t?GH V3V
Z1 D
/* (non-Javadoc) u"v7shRp:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) / FcRp,"
*/ v Y[s#*+
public void sort(int[] data) { jrib"Bh3,
MaxHeap h=new MaxHeap(); U#3N90,N=
h.init(data); 9-42A7g^C
for(int i=0;i h.remove(); nGF +a[Z
System.arraycopy(h.queue,1,data,0,data.length); }_D.Hy5
} g*V.u]U!i
(T%F^s5D
private static class MaxHeap{ 1q}LO2
V:n0BlZ,B
void init(int[] data){ a"vzC$Hxd
this.queue=new int[data.length+1]; v)5;~.+%
for(int i=0;i queue[++size]=data; "V|Rq]_+%
fixUp(size); }t)+eSUA
} jx}&%p X
} P<]U
.WF"vUp
private int size=0; kKyU?/aj
WPNB!"E98
private int[] queue; M)bQvjj
cgb>Naa<
public int get() { mfraw2H
return queue[1]; "DW~E\Y
} l9.`2d]o
46C%at M0}
public void remove() { ._}}@V_/
SortUtil.swap(queue,1,size--); LqWiw24#
fixDown(1); E|@C:ghG
} :aNjh
file://fixdown -"[4E0g0
private void fixDown(int k) { v vErzUxN
int j; cIU2qFn[
while ((j = k << 1) <= size) { Z<vz%7w
if (j < size %26amp;%26amp; queue[j] j++; j 3<Ci {3
if (queue[k]>queue[j]) file://不用交换 Ng#psN
break; B"43o7C
SortUtil.swap(queue,j,k); x"2p5T7*>
k = j; AzU:Dxr>.G
} Cd%5XD^
} , 'pYR]3
private void fixUp(int k) { L ]')=J+
while (k > 1) { KXPCkNIN!
int j = k >> 1; 6N@=*0kh-
if (queue[j]>queue[k]) *l_a=[<[
break; IL@yGuO,
SortUtil.swap(queue,j,k); !:+U-mb*
k = j; tV++QC7@L
} P y'BMk
} Z518J46o
[+[W\6
} y_WC"
<-`bWz=+
} ufL,Kq4
g#I`P&
SortUtil： ;j0.#P:a
Q6 *n'6
package org.rut.util.algorithm; {\$S585
7'wpPXdY1
import org.rut.util.algorithm.support.BubbleSort; 4!!|P
import org.rut.util.algorithm.support.HeapSort; maapX/J
import org.rut.util.algorithm.support.ImprovedMergeSort; G@s:|oe
import org.rut.util.algorithm.support.ImprovedQuickSort; c^|8qvS$
import org.rut.util.algorithm.support.InsertSort; k=)U
import org.rut.util.algorithm.support.MergeSort; `gl?y;xC
import org.rut.util.algorithm.support.QuickSort; DwBe_h.
import org.rut.util.algorithm.support.SelectionSort; amsl>wc!
import org.rut.util.algorithm.support.ShellSort; lO@-*m$
qZ<n\Mt
/** (u?s@/e:`/
* @author treeroot 5H._Q
* @since 2006-2-2 u$w.'lK
* @version 1.0 @5Z|e
*/ {V[xBL <
public class SortUtil { |]kiH^Ap
public final static int INSERT = 1; W8<QgpV*
public final static int BUBBLE = 2; ,.Gp_BI
public final static int SELECTION = 3; ir^d7CV,
public final static int SHELL = 4; 'bfxQ76@sa
public final static int QUICK = 5; i}T*| P
public final static int IMPROVED_QUICK = 6; 5zS%F: 3
public final static int MERGE = 7; M.g2y&8
public final static int IMPROVED_MERGE = 8; >Iij,J5i
public final static int HEAP = 9; v8-szW).
dwn|1%D
public static void sort(int[] data) { 8i6iynR
sort(data, IMPROVED_QUICK); c<1$zQY!
} u/tJ])~@
private static String[] name={ l<_v3/3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !+$qSD,%x
}; hx^@aI
i%yKyfD
private static Sort[] impl=new Sort[]{ +HE,Q6-A
new InsertSort(), rT="ciQ
new BubbleSort(), !d##q)D f?
new SelectionSort(), B~o3Z
new ShellSort(), ^ iu)vED
new QuickSort(), 8z93ETv7`
new ImprovedQuickSort(), -dMH>e0
new MergeSort(), CQ!D{o=
new ImprovedMergeSort(), nu^@}|UG
new HeapSort() 5]{rim
}; !jP[=
]FR#ZvM>x
public static String toString(int algorithm){ 6?"Gj}|r
return name[algorithm-1]; 7:~3B-Tb
} v0'z''KM!
:{w3l O
public static void sort(int[] data, int algorithm) { I>MLI=[Kg
impl[algorithm-1].sort(data); r[E#JHw
} ^3HSw ?a"
'(lsJY[-x
public static interface Sort { 7gtaI3
public void sort(int[] data); #W:.Fsq
} &'\-M6GW
n_sV>$f-u
public static void swap(int[] data, int i, int j) { aR6~r^jB
int temp = data; ""`z3-
data = data[j]; c%<81Y=
data[j] = temp; S*r }oX0
} dhLd2WSyH
} # wn>S<