[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; S3nA}1R
} rtcY(5Q
int i1=l; .v[8ie
int i2=mid+1; N*JWd
for(int cur=l;cur<=r;cur++){ @Tmqw(n{
if(i1==mid+1) "Yw-1h`fR
data[cur]=temp[i2++]; k>#,1GbNZy
else if(i2>r) 'qBg^c
data[cur]=temp[i1++]; ;zI;oY#.y
else if(temp[i1] data[cur]=temp[i1++]; |YjuaXd7N
else YIs(Q
data[cur]=temp[i2++]; *,1^{mb
} ]D&$k P(
} fx|$(D@9
MNip;S_j
} 4&/u1u0
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改进后的归并排序: =g'7 xA
H~RWM'_
package org.rut.util.algorithm.support; N(mhgC<O
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import org.rut.util.algorithm.SortUtil; ~V3pj('/)'
Er} xB~<t
/** "^~f.N
* @author treeroot Bt|S!tEy
* @since 2006-2-2 ry}CND(nB
* @version 1.0 0hcrQ^BB!b
*/ `.nkC_d
public class ImprovedMergeSort implements SortUtil.Sort { s9) @$3\
>L#&L?#
private static final int THRESHOLD = 10; <x DD*u
@TC_XU)&
/* Sj{z
* (non-Javadoc) 4VLrl8$K
* R^P~iAO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <jU[&~p
*/ VkFTIyt
public void sort(int[] data) { +g ovnx
int[] temp=new int[data.length]; LoUi Yf
mergeSort(data,temp,0,data.length-1); l epR}
} f5zxy!dhKS
9ZUG~d7_
private void mergeSort(int[] data, int[] temp, int l, int r) { cX"[#Em#
int i, j, k; HB`u@9le
int mid = (l + r) / 2; ?,NZ/n
if (l == r) C/%umazP9
return; 8m1@l$
if ((mid - l) >= THRESHOLD) %b'ic
mergeSort(data, temp, l, mid); )K>XLaG)
else h";G vjy
insertSort(data, l, mid - l + 1); a?E]-Zf
if ((r - mid) > THRESHOLD) G\tTwX4
mergeSort(data, temp, mid + 1, r); ZN5\lon|Y
else *\m 53mb
insertSort(data, mid + 1, r - mid); vjaIFyj
^#e:q
for (i = l; i <= mid; i++) { K)$.0S9d
temp = data; 7qA);N
} ya{vR* '~
for (j = 1; j <= r - mid; j++) { zAt!jP0E
temp[r - j + 1] = data[j + mid]; cqr!*
} ^*'|(Cv
int a = temp[l]; h>$,97EU
int b = temp[r]; ]"q[hF*PM
for (i = l, j = r, k = l; k <= r; k++) { 2fTkHBhn&
if (a < b) { z~+_sTu
data[k] = temp[i++]; wA) NB
a = temp; N:[m,U9a
} else { `zRgP#
data[k] = temp[j--]; K+Al8L?K_
b = temp[j]; b_cnVlN[
} _WtX8
} DzO0V"+H}k
} Xj"/6|X
enlk)_btp
/** ;r>?V2,tm
* @param data =|S8.|r+
* @param l :2Qm*Y&_$V
* @param i -% PUY(
*/ kmNY ;b6Y$
private void insertSort(int[] data, int start, int len) { Q[scmP^$^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); IB /.i(
} ?2OT:/I,
} 4z Af|Je
} rAIX(2@cR_
} Fp4eGuWH#
Mkko1T=6
堆排序： inZMq(_@$
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package org.rut.util.algorithm.support; a+szA};
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import org.rut.util.algorithm.SortUtil; ?cCh?>h
rw8O<No4.o
/** t*zve,?}
* @author treeroot cQzd0X
* @since 2006-2-2 |OF<=GGO+
* @version 1.0 QE)I7(
*/ XJ?|\=]
public class HeapSort implements SortUtil.Sort{ e'(n ^_$nl
?,]%V1(@V`
/* (non-Javadoc) u9"b,].b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sn2SDHY
*/ pK1P-!c
public void sort(int[] data) { (' /S~
MaxHeap h=new MaxHeap(); ?+D_*'65D
h.init(data); Kl{2^q>
for(int i=0;i h.remove(); yopEqO
System.arraycopy(h.queue,1,data,0,data.length); Lg|j0-"N
} b:\I*WJ
]o$Kh$~5
private static class MaxHeap{ ly%$>BRU
dP T)&
void init(int[] data){ c~ l$_A
this.queue=new int[data.length+1]; m@.4Wrv
for(int i=0;i queue[++size]=data; 8<0H(lj7_
fixUp(size); /],:sS7
} hz<kR@k}
} dwv xV$Nt
Otj=vGr0
private int size=0; RZjTUMAz4
T5B~CC'6
private int[] queue; ~e{AgY)
7.CzS
public int get() { )M#~/~^f+
return queue[1]; aWm0*W"(@
} "Vho`x3
PDREwBX
public void remove() { {F6hx9?
SortUtil.swap(queue,1,size--); J [2;&-@
fixDown(1); D@^ r
} .=3Sm%
file://fixdown i cQsA
private void fixDown(int k) { g}{Rk>k
int j; ,(N&%
while ((j = k << 1) <= size) { 3T# zxu
if (j < size %26amp;%26amp; queue[j] j++; BqvOi~l
if (queue[k]>queue[j]) file://不用交换 Lx8^V7X
break; uKo)iB6D
SortUtil.swap(queue,j,k); r&A#h;EQX2
k = j; =y,_FFoS
} Jh{(xGA
} =\J^_g4-l
private void fixUp(int k) { rs~RKTv-
while (k > 1) { aN).G1
int j = k >> 1; 9Wb9g/L
if (queue[j]>queue[k]) #AyM!
break; ;x@9@6_
SortUtil.swap(queue,j,k); Pw1V1v&>q
k = j; 92]>"
} V7N8m<Tf
} =4\|'V15
%LXk9K^]e
} @Q!f^
$ENA$
} _p?lRU8
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SortUtil： p W:[Q\rSj
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package org.rut.util.algorithm; 8yOzD
%3KWc-
import org.rut.util.algorithm.support.BubbleSort; I/|)?
import org.rut.util.algorithm.support.HeapSort; Up`$U~%-
import org.rut.util.algorithm.support.ImprovedMergeSort; "6Nma)8
import org.rut.util.algorithm.support.ImprovedQuickSort; .Ig`v
import org.rut.util.algorithm.support.InsertSort; YMIDV-
import org.rut.util.algorithm.support.MergeSort; F04`MY"
import org.rut.util.algorithm.support.QuickSort; )Y\},O
import org.rut.util.algorithm.support.SelectionSort; Dgc[WsCEW
import org.rut.util.algorithm.support.ShellSort; JZD27[b
$T^O38$
/** %~4R)bsJ'
* @author treeroot +"?K00*(
* @since 2006-2-2 S!#7]wtbP
* @version 1.0 `;(/Wh
*/ :)q/8 0@
public class SortUtil { -tF5$pb'
public final static int INSERT = 1; Fw!5hR`,
public final static int BUBBLE = 2; CP7Zin1S/w
public final static int SELECTION = 3; -J:](p
public final static int SHELL = 4; O2:m)@
public final static int QUICK = 5; LdU, 32
public final static int IMPROVED_QUICK = 6; ti`z:8n7
public final static int MERGE = 7; ~fAdOh
public final static int IMPROVED_MERGE = 8; yh]#V"W3
public final static int HEAP = 9; }qmZ
[\V]tpl!
public static void sort(int[] data) { bV@53_)N2
sort(data, IMPROVED_QUICK); cI?dvfU?
} Q6MDhv,
private static String[] name={ W7l/{a @
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2OAh7'8<
}; _:c8YJEG{
wI #_r_
private static Sort[] impl=new Sort[]{ 9C-F%te7
new InsertSort(), ]0ouJY
new BubbleSort(), UrH^T;#
new SelectionSort(), HzQ6KYAMq
new ShellSort(), 0"#tK4
new QuickSort(), )!|K3%9
new ImprovedQuickSort(), ?.v!RdM+
new MergeSort(), Nq9Qsia&
new ImprovedMergeSort(), vo!:uvy;2
new HeapSort() lh7{2WQ
}; {h&*H[Z z
}&y>g0$@
public static String toString(int algorithm){ nvu|V3B0
return name[algorithm-1]; Q'*-gg&)
} <Sm=,Sw
C(}9
public static void sort(int[] data, int algorithm) { ^^jF*)DT@
impl[algorithm-1].sort(data); H3QAIsGS
} @K4} cP
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public static interface Sort { 'RQZU*8
public void sort(int[] data); O*H:CW
} =H>rX 2k
K\IS"b3X
public static void swap(int[] data, int i, int j) { lr+Kwve
int temp = data; gSZNsiH
data = data[j]; Q7"KgqpQ3
data[j] = temp; Tx/
} ]=WJ%p1l
} /-^gK^