[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; g [K8G
} owB)+
int i1=l; (nG
int i2=mid+1; (TsgVq]L
for(int cur=l;cur<=r;cur++){ ny0`~bl{p
if(i1==mid+1) xFh}%mwpt[
data[cur]=temp[i2++]; ^YV[1~O
else if(i2>r) bjZ?WZr
data[cur]=temp[i1++]; G"(!5+DLy
else if(temp[i1] data[cur]=temp[i1++]; F ry5v?22
else 1U!CD-%(
data[cur]=temp[i2++]; .FyC4"b=c
} `3Y+:!q
} 4i\n1RW
"@_f>3z
} 1{qg@xlj
~drNlt9jf
改进后的归并排序: Ki2_Nh>tM
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package org.rut.util.algorithm.support; ">7 bnOJ
d p].FS
import org.rut.util.algorithm.SortUtil; *^]ba>
)deuB5kz
/** aE}u5L$#
* @author treeroot @,hvXl-G*
* @since 2006-2-2 !{+(oDN
* @version 1.0 fQ@["b
*/ ftbu:RtK^^
public class ImprovedMergeSort implements SortUtil.Sort { 4R.#=]F
. Hw^Nx
private static final int THRESHOLD = 10; '?nhpT^
eL*Edl|#
/* "&~Um U4CN
* (non-Javadoc) >dO^pDSs
* o_S8fHqjt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6b0#z#E
*/ UaB!,vs3st
public void sort(int[] data) { 5E]I
int[] temp=new int[data.length]; 8V@3T/}
mergeSort(data,temp,0,data.length-1); vU_#(jZ
} [>fE{~Y
(_D#gr{S=
private void mergeSort(int[] data, int[] temp, int l, int r) { 4r %NtXAa
int i, j, k; 3j6$!89'
int mid = (l + r) / 2; K-/fq=z
if (l == r) awUIYAgJ3
return; Z^b1i`v
if ((mid - l) >= THRESHOLD) ^K8Ey#T
mergeSort(data, temp, l, mid); fz%urbJR
else AO/R2a(:
insertSort(data, l, mid - l + 1); 6D>o(b2
if ((r - mid) > THRESHOLD) /D eU`rj
mergeSort(data, temp, mid + 1, r); "&An9H'
else ^ `!6Yax?
insertSort(data, mid + 1, r - mid); <X:7$v6T|
NVQIRQ.
for (i = l; i <= mid; i++) { PR6{Y]e%
temp = data; N=(rl#<
} ,>)/y
for (j = 1; j <= r - mid; j++) { mwBOhEefNJ
temp[r - j + 1] = data[j + mid]; /.vB /{2
} WVKzh
int a = temp[l]; mZmwCS8
int b = temp[r]; A@GyKx%x$
for (i = l, j = r, k = l; k <= r; k++) { 74>.E^/x
if (a < b) { f"S^:F0
data[k] = temp[i++]; l%U{Unwu
a = temp; Rc @p!Xi
} else { &R25J$
data[k] = temp[j--]; 1aKY+4/G
b = temp[j]; JPRl/P$
} P)4SrqW_
} b:oB $E
} gWRSS=8%
>Qr(#Bt)
/** (Zp'|hx8o
* @param data Fq:BRgCE
* @param l S'q (Qo
* @param i 0I1bY]*
*/ c<|;<8ew
private void insertSort(int[] data, int start, int len) { JS}iNS'X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 46sV\In>?
} R0vWj9nPh
} B\`4TU}kE
} 4vF1
} UH2fP G
j8P=8w{
堆排序： R!5j1hMN`
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package org.rut.util.algorithm.support; _DS_AW}D
!{jDZ?z{h
import org.rut.util.algorithm.SortUtil; qq G24**9v
7vZznN8e
/** M, f6UYo=
* @author treeroot @-)jU!
* @since 2006-2-2 gy0l@ 5 N
* @version 1.0 WZ> }
*/ >La!O~d
public class HeapSort implements SortUtil.Sort{ xj\!Sn2
,ir(~g+{g
/* (non-Javadoc) _XvSe]`f`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A&XI1. j6
*/ EVX*YGxx6
public void sort(int[] data) { *Yj!f68
MaxHeap h=new MaxHeap(); D<%/:M
h.init(data); {B+|",O5)
for(int i=0;i h.remove(); G&,F-|`
System.arraycopy(h.queue,1,data,0,data.length); SHWD@WLE4
} iEjUo, Y[
O1[`2kj^HB
private static class MaxHeap{ DC+p s
GI']&{
void init(int[] data){ ;&=c@>!xP#
this.queue=new int[data.length+1]; ufq9+}
for(int i=0;i queue[++size]=data; 2Tt^^Lb
fixUp(size); |}$ZOwc
} *7cc4 wGQ
} 4b5'nu
.Aj4?AXWc
private int size=0; GE?M. '!{{
m}`!FaB #
private int[] queue; n3x<L:)
*{TB<^ *
public int get() { 9\f%+?p
return queue[1]; pT ]:TRPS
} 'Sk-L 5
z"D'rHxy
public void remove() { ( &N`N1
SortUtil.swap(queue,1,size--); q#pD}Xe$
fixDown(1); 2":{3=oW~
} %OT}r
file://fixdown #z$g1\v
private void fixDown(int k) { Cg#@JuwHa
int j; T'8d|$X
while ((j = k << 1) <= size) { U?/C>g%/PI
if (j < size %26amp;%26amp; queue[j] j++; jc0Trs{Jf
if (queue[k]>queue[j]) file://不用交换 _|1m]2'9
break; pA?kv]l(
SortUtil.swap(queue,j,k); >oYr=O
k = j; U]Pl` =SL
} SyL:=NZ
} ']Z1nb
private void fixUp(int k) { $*-UY
while (k > 1) { xZ84q'i"
int j = k >> 1; HdR%n
if (queue[j]>queue[k]) K."%PdC
break; w%'8bH!
SortUtil.swap(queue,j,k); 4arqlzlo
k = j; M?[~_0_J
} Rlyx&C8
} (,P6cWt}"
<&47W
} vr2cDk{
,Y+J.8.H
} 0D==0n
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SortUtil： a Byetc88/
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package org.rut.util.algorithm; &\p=s.y?j
\A%s" O/
import org.rut.util.algorithm.support.BubbleSort; 'O:QS)
import org.rut.util.algorithm.support.HeapSort; x )w6
import org.rut.util.algorithm.support.ImprovedMergeSort; 0YsBAfRG
import org.rut.util.algorithm.support.ImprovedQuickSort; nm}wdel"
import org.rut.util.algorithm.support.InsertSort; @hVF}ybp
import org.rut.util.algorithm.support.MergeSort; GeydVT-
import org.rut.util.algorithm.support.QuickSort; g#}a?kTM@
import org.rut.util.algorithm.support.SelectionSort; T*3>LY+bb
import org.rut.util.algorithm.support.ShellSort; #Y>os3]
I7C*P~32{n
/** .$]%gjIBCl
* @author treeroot @a]O(S>Ub
* @since 2006-2-2 a9%^Jvm"
* @version 1.0 )1PjI9M
*/ 7SVqfWp
public class SortUtil { ;;{!wA+"D
public final static int INSERT = 1; 5JvrQGvL
public final static int BUBBLE = 2; aePLP
public final static int SELECTION = 3; iVdY\+N!<
public final static int SHELL = 4; vj#Y /B
public final static int QUICK = 5; K3I|d;Y~X!
public final static int IMPROVED_QUICK = 6; 9vL n#_
public final static int MERGE = 7; "tX=^4
public final static int IMPROVED_MERGE = 8; Bsc&#
public final static int HEAP = 9; bw[s<z|LKA
sgxD5xj}4
public static void sort(int[] data) { 7FBaN7l
sort(data, IMPROVED_QUICK); ==XO:P
} jMUN|(=Y
private static String[] name={ +#@)C?G,TF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" sc)}r_|g
}; }:zTz%_K
1[U`,(C1
private static Sort[] impl=new Sort[]{ #=V[vbTY
new InsertSort(), 8x/]H(J
new BubbleSort(), A^3M~
new SelectionSort(), f8JWg9m
new ShellSort(), |08'd5
new QuickSort(), YQ _]Jv k
new ImprovedQuickSort(), dd6m/3uUW
new MergeSort(), umJ!j&(
new ImprovedMergeSort(), 41oXOB
new HeapSort() Op>l~{{{
}; +>*! 3x+sE
J&w'0
public static String toString(int algorithm){ @;1Ym\zc
return name[algorithm-1]; gAxf5A_x)
} 1Ht&;V
kH|cB!?x
public static void sort(int[] data, int algorithm) { JQ"R%g`8
impl[algorithm-1].sort(data); g\~n5=-D
} Z6\H4,k&
>"?jW@|g
public static interface Sort { >\s8S}p
public void sort(int[] data); U9/6F8D1Y1
} q:a-tdv2
d(!g9H
public static void swap(int[] data, int i, int j) { ra]lC7<H
int temp = data; )wdTs>W7
data = data[j]; 79MF;>=tV
data[j] = temp; Gw@]w;ed
} -:~"c@D
} MIx,#]C&