[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; ,0?3k
} qg*xdefQ%
int i1=l; xj5MKX{CJT
int i2=mid+1; l\u5RMS('
for(int cur=l;cur<=r;cur++){ 3'7X[{uBr
if(i1==mid+1) ApcE)mjpc
data[cur]=temp[i2++]; ^~3{n
else if(i2>r) !F2JT@6
data[cur]=temp[i1++]; vJQ_mz
else if(temp[i1] data[cur]=temp[i1++]; >/.Ae8I)
else bV*q~@xh
data[cur]=temp[i2++]; B"t4{1/
} jzI,B
} !1<>][F
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} 8vj]S5
m'2EiYX$}\
改进后的归并排序: )-i(%;,*e
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package org.rut.util.algorithm.support; , lBHA+@
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import org.rut.util.algorithm.SortUtil; ei[,ug'
=[)2DJC
/** QD 0p
* @author treeroot {y<E_y x1
* @since 2006-2-2 kvt^s0T8Q
* @version 1.0 )<T2J0*
*/ ~S0T+4$
public class ImprovedMergeSort implements SortUtil.Sort { l i%8X.
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private static final int THRESHOLD = 10; |e2s{J2
i>=y3x"
/* C1-Jj_XQ.
* (non-Javadoc) nd h\+7
* 7[M@;$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z~jk_|?|?
*/ &qm:36Y7Xg
public void sort(int[] data) { .zJZ*\2ob
int[] temp=new int[data.length]; }jL4F$wC
mergeSort(data,temp,0,data.length-1); ItG|{Bo
} NDG?Xs [2
"ZG2olOqLI
private void mergeSort(int[] data, int[] temp, int l, int r) { "gXvnl
int i, j, k; #aadnbf
int mid = (l + r) / 2; bFfDaO<k
if (l == r) Rts}y:44
return; D ~NWP%H
if ((mid - l) >= THRESHOLD) ASr3P5/
mergeSort(data, temp, l, mid); x' 3kHw
else %;O# y3,
insertSort(data, l, mid - l + 1); M:%Ll3
if ((r - mid) > THRESHOLD) XE;aJ'kt
mergeSort(data, temp, mid + 1, r); rTeADu_vf
else "':SWKuMx
insertSort(data, mid + 1, r - mid); (U*Zz+ R
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for (i = l; i <= mid; i++) { / KKA/
temp = data; A$]#f
} ^>h2.AJ
for (j = 1; j <= r - mid; j++) { 21~~=+)X
temp[r - j + 1] = data[j + mid]; 22D,,nC0+=
} v3]~*\!5
int a = temp[l]; buxyZV@1
int b = temp[r]; lp5b&I_
for (i = l, j = r, k = l; k <= r; k++) { XKbTjR
if (a < b) { S@C"tHD
data[k] = temp[i++]; <##aD3)
a = temp; qjIcRue'"
} else { TA+/35^?
data[k] = temp[j--]; <}AmzeHr+
b = temp[j]; OJ}aN>k
} mtNB09E(
} 62>/0_m5
} w6'8L s
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/** kk/vgte-)e
* @param data cqb]LC
* @param l BWsD~Ft
* @param i bpfSe
*/ @C5%`{\
private void insertSort(int[] data, int start, int len) { 4,ewp coC%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s;:quM
} 4?~Ei[KgQn
} d6"B_,*b
} E>qehs,g
} cONfHl{
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堆排序： .%mjE'
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package org.rut.util.algorithm.support; *q(HW
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import org.rut.util.algorithm.SortUtil; 5$ rV0X,O
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/** "QV1G'
* @author treeroot SrXuiiK
* @since 2006-2-2 z';h5GNd>z
* @version 1.0 $dHD
*/ w7_2JS
public class HeapSort implements SortUtil.Sort{ )"y]_}
A;Uw b
/* (non-Javadoc) _ 4+=S)$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]Oe[;<I
*/ -!ERe@k(
public void sort(int[] data) { SP5t=#M6
MaxHeap h=new MaxHeap(); , -S n
h.init(data); o`[X _
for(int i=0;i h.remove(); ?a-}1A{
System.arraycopy(h.queue,1,data,0,data.length); XBHv V05mv
} Uc|MfxsL
7=]Y7"XCf
private static class MaxHeap{ +@K8:}lOW
Z!qF0UDj
void init(int[] data){ P+;@?ofB
this.queue=new int[data.length+1]; =v/x&,Uj@6
for(int i=0;i queue[++size]=data; M.}QXta
fixUp(size); .s<tQU
} 74*iF'f?c
} Gh9dv|m=[;
*wfkjG
private int size=0; ak;S Ie
w^QqYUL${
private int[] queue; |)u|@\{
]ch=D
public int get() { W[j7Vi8v
return queue[1]; XY`2>7
} .Dg'MMBM
x$tzq+N
public void remove() { g].hL
SortUtil.swap(queue,1,size--); =;A~$[g
fixDown(1); ~b{j`T
} rzgzX
file://fixdown Zu%oIk
private void fixDown(int k) { @?"t&h
int j; Y{ 2xokJ N
while ((j = k << 1) <= size) { 8rsv8OO
if (j < size %26amp;%26amp; queue[j] j++; j<*`?V^
if (queue[k]>queue[j]) file://不用交换 64qQ:D7C
break; Yg14aKZl
SortUtil.swap(queue,j,k); MEn#MT/Cz
k = j; 5Ai$1'*p
} J'y*>dW
} @;@Wt`(2a
private void fixUp(int k) { N\dr_
while (k > 1) { SvGs?nUU
int j = k >> 1; s *1%I$=@
if (queue[j]>queue[k]) UQ 'U 4q
break; a'ODm6#
SortUtil.swap(queue,j,k); Q CB~x2C
k = j; ~j2=hkS
} *npe]cC
} A?829<
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} L #l|}u
? /Z hu
} 4\yKd8I
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SortUtil： C\dlQQ
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package org.rut.util.algorithm; BV HO_
2nPU $\du
import org.rut.util.algorithm.support.BubbleSort; h/%Hk;|9
import org.rut.util.algorithm.support.HeapSort; \4`2k
import org.rut.util.algorithm.support.ImprovedMergeSort; $R<eXDW6:
import org.rut.util.algorithm.support.ImprovedQuickSort; DweWFipyPi
import org.rut.util.algorithm.support.InsertSort; \i#0:3s.
import org.rut.util.algorithm.support.MergeSort; +C !A@
import org.rut.util.algorithm.support.QuickSort; r3b~|O^}
import org.rut.util.algorithm.support.SelectionSort; &c!=< <5M
import org.rut.util.algorithm.support.ShellSort; @*c) s_
L"6@3
/** 6Pa jBEF
* @author treeroot H;n(qBSB
* @since 2006-2-2 S[ ,r.+
* @version 1.0 C&'Y@GE5
*/ {XNu4d9w(
public class SortUtil { 8Cr?0Z
public final static int INSERT = 1; q}["Nww-
public final static int BUBBLE = 2; jTx,5s-
public final static int SELECTION = 3; ZWJFd(6
public final static int SHELL = 4; Dk fw*Oo
public final static int QUICK = 5; TY|]""3f9
public final static int IMPROVED_QUICK = 6; 1xo<V5
public final static int MERGE = 7; prY9SQd
public final static int IMPROVED_MERGE = 8; ]X)EO49
public final static int HEAP = 9; ^$y_~z3o#7
BE}qwP^
public static void sort(int[] data) { lA<IcW
sort(data, IMPROVED_QUICK); W$Bx?}x($
} P( W8XC
private static String[] name={ o;JBe"1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" I -obfyije
}; jjm-%W@
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private static Sort[] impl=new Sort[]{ &7X0 ;<
new InsertSort(), >:`Y]6z
new BubbleSort(), Q=9S?p M
new SelectionSort(), .0q %A1H
new ShellSort(), y*6r&989
new QuickSort(), :LFwJ
new ImprovedQuickSort(), |C S[>0mV!
new MergeSort(), mlgdwM
new ImprovedMergeSort(), 8C=Y(vPk2
new HeapSort() F77[fp
}; ls6ywLP{
s^9N7'
public static String toString(int algorithm){ "FaG5X(
return name[algorithm-1]; RS/%uxS?
} Nu{RF
|[|X
public static void sort(int[] data, int algorithm) { 0p$?-81BJ
impl[algorithm-1].sort(data); q#PGcCtu
} MT#9x>
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public static interface Sort { k>n^QHM
public void sort(int[] data); =k`(!r2"#
} 6SsZK)X
t Q_}o[
public static void swap(int[] data, int i, int j) { M42D5|tZc
int temp = data; ~eL7=G@{
data = data[j]; |_~BV&g,N
data[j] = temp; $zz=>BOk
} m=fmf(
} W9V%Xc`LQ