[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; D4<nS<8
} n;Tpf<*U
int i1=l; K>6#MI
int i2=mid+1; Rtw^ lo
for(int cur=l;cur<=r;cur++){ !p4w 8
if(i1==mid+1) wxVf6`
data[cur]=temp[i2++]; {NXc<0a(
else if(i2>r) 9kL'"0c
data[cur]=temp[i1++]; 5Tluxt71
else if(temp[i1] data[cur]=temp[i1++]; 5i7,s
else mm\Jf
data[cur]=temp[i2++]; dG}fpQ3&
} mZ3i#a4
} g<{/mxv/
7$WO@yOsh
} GM|gm-t<@
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改进后的归并排序: p>h B&h
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package org.rut.util.algorithm.support; D`0II=
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import org.rut.util.algorithm.SortUtil; >3s9vdUp4h
x0@J~ _0
/** "12.Bi.O"[
* @author treeroot /ZHuT=j1
* @since 2006-2-2 3g9xTG);eA
* @version 1.0 'W usEME
*/ sguE{!BO
public class ImprovedMergeSort implements SortUtil.Sort { 2;r(?ebw
P}N%**>`
private static final int THRESHOLD = 10; 1i4KZ"A5+
PF*<_p"j
/* P;bl+a'gu
* (non-Javadoc) o1YX^-<[F
* &}@U#w]l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "pdmz+k8S
*/ Gp'rN}i^
public void sort(int[] data) { zg+78
int[] temp=new int[data.length]; Enm#\(j
mergeSort(data,temp,0,data.length-1); 0RAmwfXm
} db$Th=s[
_Sy-&}c+ +
private void mergeSort(int[] data, int[] temp, int l, int r) { z:-a7_
int i, j, k; K,bv\j;f
int mid = (l + r) / 2; &1YqPk
if (l == r) <at/z9b
return; ,@jRe&6
if ((mid - l) >= THRESHOLD) I-oI,c%+
mergeSort(data, temp, l, mid); wx nD3
else K)~ m{
insertSort(data, l, mid - l + 1); /~NsHStn
if ((r - mid) > THRESHOLD) oGx OJyD
mergeSort(data, temp, mid + 1, r); $'*@g1vY
else J*$u
insertSort(data, mid + 1, r - mid); *gfx'$
vJVL%,7
for (i = l; i <= mid; i++) { u"XqWLTV
temp = data; E</UmM+ R
} exrsYo!%
for (j = 1; j <= r - mid; j++) { 'uS!rKkQlu
temp[r - j + 1] = data[j + mid]; #-dfG.*
} n#t{3qzpD
int a = temp[l]; Q1 ?O~ao
int b = temp[r]; {.pR$]6B"+
for (i = l, j = r, k = l; k <= r; k++) { @-nCK Yj
if (a < b) { X5UcemO
data[k] = temp[i++]; \GS]jhEtn
a = temp; ?rID fEvV
} else { q+f]E&':
data[k] = temp[j--]; opxVxjTT#
b = temp[j]; w^Qb9vTa8
} |@?B%sY
} Ac;rMwXk#
} 0&T0Ls#4
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/** O9*cV3}H
* @param data 7|LJwXQ-
* @param l //cj$}Rn!
* @param i k<RJSK8
*/ R2WEPMH%
private void insertSort(int[] data, int start, int len) { zJJ KLr;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^(y=DJ7
} <Z5ak4P
} maQE Bi,
} XzI c<81Z
} (,1}P
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堆排序： ;@p2s'(
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package org.rut.util.algorithm.support; su6x okt
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import org.rut.util.algorithm.SortUtil; _"n1"%Ns
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/** 4GWt.+{J$
* @author treeroot oT2h'gu")
* @since 2006-2-2 pFi.?|6"
* @version 1.0 wuE]ju<
*/ !9=hUpRN
public class HeapSort implements SortUtil.Sort{ >B(%$jG Z
7[5g_D t
/* (non-Javadoc) ].53t"*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Poy ]5:.
*/ f!hQ"1[
public void sort(int[] data) { !xmvCH=2
MaxHeap h=new MaxHeap(); xLX<.z!r
h.init(data); :e>y= s>
for(int i=0;i h.remove(); ]-"~?
System.arraycopy(h.queue,1,data,0,data.length); <>/0;J1<
} .Tr!/mf_
~_ss[\N
private static class MaxHeap{ taOD,}c|$
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void init(int[] data){ }~pT saw
this.queue=new int[data.length+1]; ;okFm
for(int i=0;i queue[++size]=data; {<0=y#@u
fixUp(size); K{)N:|y%!$
} WLGk
} T0BFit6
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private int size=0; 7U68|\fI!
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private int[] queue; eh_{-
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public int get() { :*|%g
return queue[1]; g]au|$L4
} y ,][
w$I<WS{J:Z
public void remove() { u1K;{>4lx
SortUtil.swap(queue,1,size--); 1L722I@
fixDown(1); ! bbVa/
} k(l
file://fixdown *Y!'3|T
private void fixDown(int k) { 5bU[uT,`6
int j; {2wfv2hQ
while ((j = k << 1) <= size) { N-* ^V^V
if (j < size %26amp;%26amp; queue[j] j++; Zz!0|-\
if (queue[k]>queue[j]) file://不用交换 57r?`'#*
break; =7%1]
SortUtil.swap(queue,j,k); _SU%ul
k = j; FPj j1U`C
} r[; .1,(
} F-i`GMWC
private void fixUp(int k) { H}m%=?y@
while (k > 1) { E}eu]2=nU}
int j = k >> 1; y9W6e"
if (queue[j]>queue[k]) l)y$c}U
break; t(3<w)r2
SortUtil.swap(queue,j,k); dH4wyd`
k = j; xXG-yh
} ul[edp_
} 5IOMc4v
'r`#u@TTZ
} {m1=#*
-*q:B[d
} ?VC[%sjwn
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SortUtil： paFiuQ
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package org.rut.util.algorithm; R.n:W;^`
9 Yv;Dom
import org.rut.util.algorithm.support.BubbleSort; tbz?th\#
import org.rut.util.algorithm.support.HeapSort; Y:|_M3&'o
import org.rut.util.algorithm.support.ImprovedMergeSort; 6ww4ZH?j
import org.rut.util.algorithm.support.ImprovedQuickSort; _86pbr9
import org.rut.util.algorithm.support.InsertSort; DRS68^
import org.rut.util.algorithm.support.MergeSort; 5I#L|+
import org.rut.util.algorithm.support.QuickSort; ;3ZHm*xJx
import org.rut.util.algorithm.support.SelectionSort; IIC1T{D}v
import org.rut.util.algorithm.support.ShellSort; Oc\Bu6F
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/** 4 ZD~i e
* @author treeroot _`6fGu& W
* @since 2006-2-2 z[xi
* @version 1.0 =HJ)!(
*/ e[txJ*SuO
public class SortUtil { c\2+f7o@
public final static int INSERT = 1; eK_Q>;k5A
public final static int BUBBLE = 2; 8r7}6
public final static int SELECTION = 3; "`pI!nj
public final static int SHELL = 4; 5nq0#0Oc
public final static int QUICK = 5; &,?bX])
public final static int IMPROVED_QUICK = 6; ex_Zw+n
public final static int MERGE = 7; r;3{%S._
public final static int IMPROVED_MERGE = 8; i <KWFF#
public final static int HEAP = 9; SM>V o+
2&*r1NXBE
public static void sort(int[] data) { 7^Y"K
sort(data, IMPROVED_QUICK); ~udi=J|
} *Xh)22~T
private static String[] name={ !<!5;f8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }6#lE,\lM
}; F Qtlo+3
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private static Sort[] impl=new Sort[]{ IooAXwOF
new InsertSort(), 0fgt2gA33
new BubbleSort(), #R_IF&7
new SelectionSort(), I!IWmU6FN
new ShellSort(), }UwDHq=
new QuickSort(), a]NQlsE}l
new ImprovedQuickSort(), RS&l68[6
new MergeSort(), rUC@Bf
new ImprovedMergeSort(), GX4HW \>a
new HeapSort() \B _g=K
}; x!CCSM;q
/15e-(Zz/
public static String toString(int algorithm){ }S{#DgZ@X
return name[algorithm-1]; YJZViic
} YVy+1q[
xA|72!zk0P
public static void sort(int[] data, int algorithm) { #h'F6
impl[algorithm-1].sort(data); Hm=!;xAFX
} O][R"5d
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public static interface Sort { c`]_Q1'30w
public void sort(int[] data); bYT,f.,5{
} J!sIxwF
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public static void swap(int[] data, int i, int j) { %";bgU2Q
int temp = data; 0rbMT`Hy
data = data[j]; <ptZY.8N
data[j] = temp; =n_r\z
} "F/%{0d
} . IBy'