[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; PY?8[A+
} 8!&nKy<Y
int i1=l; TjxA#D)
int i2=mid+1; {Bh("wg$Lk
for(int cur=l;cur<=r;cur++){ ,of]J|
if(i1==mid+1) 8'_ 0g[s
data[cur]=temp[i2++]; WfZF~$li`
else if(i2>r) e'34Pw!m
data[cur]=temp[i1++]; wd/G|kNO
else if(temp[i1] data[cur]=temp[i1++]; 2:Q(Gl`<l
else ~h! 13!
data[cur]=temp[i2++]; /;Yy@oc
} Fi4UaJ3K
} zPR8f-Uvw
}#Doy{T
} Mu{BUtkzG
D^+?|Y@N
改进后的归并排序: v>H=,.`0\
zC=a3
package org.rut.util.algorithm.support; }^Gd4[(,g
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import org.rut.util.algorithm.SortUtil; L[y Pjw:0
<r~wZ}s
/** bAEg$A
* @author treeroot 5dl,co{q
* @since 2006-2-2 Q=#I9-
* @version 1.0 ?qmp_2:WU
*/ L%t@,O#,
public class ImprovedMergeSort implements SortUtil.Sort { [|RjHGf
(RE2I
private static final int THRESHOLD = 10; _w!a`w*3
w<NyV8-hL
/* aC!EWgwW[
* (non-Javadoc) gl8Ib<{
* z)-c#F@%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QM'X@
*/ =lp1Z>
public void sort(int[] data) { N|K4{Frm
int[] temp=new int[data.length]; y9L14
mergeSort(data,temp,0,data.length-1); ~aTKG|74
} XRtD< jlA"
^U@~+dw
private void mergeSort(int[] data, int[] temp, int l, int r) { Udgqkl
int i, j, k; QJGKQ2^ n
int mid = (l + r) / 2; ?X9UTOx
if (l == r) [ MyE2^
return; WFTvOFj
if ((mid - l) >= THRESHOLD) pG3k
mergeSort(data, temp, l, mid); A7Po 3n%Q
else qv*7K@
insertSort(data, l, mid - l + 1); I/6)3su%
if ((r - mid) > THRESHOLD) g}LAks
mergeSort(data, temp, mid + 1, r); UL$}{2N,_
else d+eZub94U
insertSort(data, mid + 1, r - mid); W?woNt'n
nh+l78
for (i = l; i <= mid; i++) { D{8PQ2x>
temp = data; 8*c3|
} ZO7&vF}
for (j = 1; j <= r - mid; j++) { XG@`ZJhU6
temp[r - j + 1] = data[j + mid]; ]O` {dnP
} ]{ d[
int a = temp[l]; h7;bclU
int b = temp[r]; 5M23/= N
for (i = l, j = r, k = l; k <= r; k++) { R:aYL~
if (a < b) { 0m+8P$)C%
data[k] = temp[i++]; 3^.8.q(6
a = temp; GIv){[i
} else { yu ,h\
data[k] = temp[j--]; qd!#t]
b = temp[j]; !Zbesp KZ
} m&R"2t_Z
} RP(/x+V
} @ERu>nSP
3AlqBXE"Z<
/** EX?h0Uy
* @param data }.:d#]g8
* @param l PM4>ThQ
* @param i w}M3x^9@
*/ 2[dIOb4b
private void insertSort(int[] data, int start, int len) { %^9:%ytt
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b4 hIeBI\
} c6b0*!D"}
} l_v*7d
} +zRh fIJHH
} [[qwaI
=s'7$D}0.
堆排序： GM}C]MVD
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package org.rut.util.algorithm.support; *`KrVu 6s
2q%K)h
import org.rut.util.algorithm.SortUtil; ,deUsc
-NDi5i\
/** 7<yp"5><)
* @author treeroot DuF7HTN[K
* @since 2006-2-2 6.Bh3p
* @version 1.0 <pOl[5v]
*/ X&\o{w9%
public class HeapSort implements SortUtil.Sort{ w &vhWq
Z5>V{o
/* (non-Javadoc) IT1PPm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Lht[g9
*/ S+FQa7k
public void sort(int[] data) { bag&BHw
MaxHeap h=new MaxHeap(); e}Q>\t45
h.init(data); l#6&WWmr
for(int i=0;i h.remove(); ny`(f,)u*
System.arraycopy(h.queue,1,data,0,data.length); {NeWdC
} Wy(pLBmb
$WNG07]tU
private static class MaxHeap{ NV#')+Ba
4p x_ZD#J
void init(int[] data){ d +xA:
this.queue=new int[data.length+1]; cqk]NL`'
for(int i=0;i queue[++size]=data; jvO3_Zt9
fixUp(size); W^(Iw%ek
} q5?L1
} K_##-6>
i>"dBJh]b
private int size=0; .M+v?Ad
ru(J5+H
private int[] queue; A|C_np^z2
0h:G4
public int get() { (+x]##Q
return queue[1]; 1$OVe4H1
} /u?9S/
{,F/KL^u
public void remove() { ?C~X@sq
SortUtil.swap(queue,1,size--); :Q=z=`*2w
fixDown(1); !^1[ s@1
} zS?n>ElI
file://fixdown (h|ch#
private void fixDown(int k) { 0T1ko,C!,e
int j; s<d!+<
while ((j = k << 1) <= size) { = uk`pj[l
if (j < size %26amp;%26amp; queue[j] j++; yP%o0n/"x
if (queue[k]>queue[j]) file://不用交换 enPLaiJ'|q
break; +]_nbWL(%
SortUtil.swap(queue,j,k); s~)L_ p
k = j; e^Aa!
} +h|K[=l\
} a(5y>HF
private void fixUp(int k) { 8Yxhd .
while (k > 1) { %awVVt{aG
int j = k >> 1; mHHzCKE,
if (queue[j]>queue[k]) O!yakU+
break; d>;2,srUf
SortUtil.swap(queue,j,k); >j) w\i
k = j; ;*.(.
} cP,;Qbe
} |&Au63
BL0|\&*1
} XL&hs+Y
(GnVwJ<v9V
} k3C"
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SortUtil： T^N L:78
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package org.rut.util.algorithm; yV8-
8znj~7}#
import org.rut.util.algorithm.support.BubbleSort; Ew>~a8!Fq
import org.rut.util.algorithm.support.HeapSort; ~c!Rx'
import org.rut.util.algorithm.support.ImprovedMergeSort; v;Swo("
import org.rut.util.algorithm.support.ImprovedQuickSort; tK*%8I\s
import org.rut.util.algorithm.support.InsertSort; kpl~/i`4
import org.rut.util.algorithm.support.MergeSort; m;1'u;
import org.rut.util.algorithm.support.QuickSort; m**0rpA
import org.rut.util.algorithm.support.SelectionSort; P$6W`^DZ
import org.rut.util.algorithm.support.ShellSort; &|s+KP|d
)\D2\1e(c
/** l_bL,-|E8
* @author treeroot FPvuzBJ
* @since 2006-2-2 AS`2=w
* @version 1.0 fE'-.nA+
*/ Z+r%_|kZ
public class SortUtil { S^|$23}
public final static int INSERT = 1; ht2 f-EKf{
public final static int BUBBLE = 2; <V7SSm
public final static int SELECTION = 3; JL?Cnk$!
public final static int SHELL = 4; WC3W+v G7
public final static int QUICK = 5; ~5FS|[1L
public final static int IMPROVED_QUICK = 6; U)u\1AV5
public final static int MERGE = 7; @bc[ eas
public final static int IMPROVED_MERGE = 8; Y||yzJdC
public final static int HEAP = 9; Q^*G`&w,
mYiSR
public static void sort(int[] data) { @>M8Pe
sort(data, IMPROVED_QUICK); ;,<r|.6U
} g@<sU0B
private static String[] name={ (m<R0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +fC#2%VnU
}; c:3@[nF~
kX@bv"i
private static Sort[] impl=new Sort[]{ 5dg-d\6S
new InsertSort(), I/^q+l.=`{
new BubbleSort(), _Wm(/ +G_|
new SelectionSort(), 44'=;/
new ShellSort(), nu;}S!J
new QuickSort(), nw~/~eM5=
new ImprovedQuickSort(), [SCw<<l<
new MergeSort(), 0|.7Kz^
new ImprovedMergeSort(), 8T8pAs0 p
new HeapSort() ,AdusM
}; q:TZ=bs^
/d{glOk
public static String toString(int algorithm){ DkDw>Nx<rs
return name[algorithm-1]; ZmEG<T05
} A Oby*c
[54@irH
public static void sort(int[] data, int algorithm) { `V]egdO
impl[algorithm-1].sort(data); i0,%}{`
} aeG#: Ln+{
)p^m}N 6M]
public static interface Sort { 80{#bb
public void sort(int[] data); @J~lV\
} T)b3N|ONB
4a(g<5wfI
public static void swap(int[] data, int i, int j) { $w|o@ Ml)
int temp = data; F3kC"H
data = data[j]; >/7KL2*
data[j] = temp; r4;5b s6wm
} F,'^se4&
} c*y$bf<