[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; et`1#_o
} v[Mh[CyB
int i1=l; 3VZ}5
int i2=mid+1; 14~#k%zO(
for(int cur=l;cur<=r;cur++){ FhP$R}F
if(i1==mid+1) ;B^ 9sr
data[cur]=temp[i2++]; nyoLrTs{
else if(i2>r) at|.Q*&a#
data[cur]=temp[i1++]; } yb"/jp
else if(temp[i1] data[cur]=temp[i1++]; tZXq<k9
else (Sv=R(_s
data[cur]=temp[i2++]; ;W 3#q:
} H\%^n<]#
} "g5<jp
y&n-8L_
} */_$' /qV
`w8Ejm?n
改进后的归并排序: G1 K@Ir<
a S;z YD
package org.rut.util.algorithm.support; PIHix{YR
<)$e*HrI
import org.rut.util.algorithm.SortUtil; XQ'$J_hC
<`V_H~Z
/** ([ jm=[E^
* @author treeroot <@S'vcO
* @since 2006-2-2 )H1\4LeP
* @version 1.0 $RA+StF!]
*/ SpO%nZ";g8
public class ImprovedMergeSort implements SortUtil.Sort { 01n7ua*XX
f8?hEa:js
private static final int THRESHOLD = 10; eK[9wEdn
iBPIj;,
/* H2S/!Q;K
* (non-Javadoc) $jg~a
* ]>/oo=E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "8$Muwm
*/ Pk3b#$+E
public void sort(int[] data) { ^/ff)'.J
int[] temp=new int[data.length]; :@b=;
mergeSort(data,temp,0,data.length-1); Dnl|B\
} }~v&
no$X0ia
private void mergeSort(int[] data, int[] temp, int l, int r) { F2>W{-H+
int i, j, k; .~a.mT
int mid = (l + r) / 2; < ZG!w^
if (l == r) \nUJ)w
return; >:bXw#w]
if ((mid - l) >= THRESHOLD) TVZf@U
mergeSort(data, temp, l, mid); +<T361eyY
else <CcSChCg
insertSort(data, l, mid - l + 1); `l'Ine11
if ((r - mid) > THRESHOLD) *x/H
mergeSort(data, temp, mid + 1, r); +ovT?CMo
else R('\i/fy
insertSort(data, mid + 1, r - mid); 'kSm}}y
Q5&|1m Pb
for (i = l; i <= mid; i++) { ctoh&5%!n+
temp = data; Ub{7Xk n
} Y1;jRIOA
for (j = 1; j <= r - mid; j++) { {(IHHA>
temp[r - j + 1] = data[j + mid]; 3V]08
} )b~+\xL5J
int a = temp[l]; hZ|8mV
int b = temp[r]; % kaV?j
for (i = l, j = r, k = l; k <= r; k++) { M_O)w^ '
if (a < b) { ~#dfZa&
data[k] = temp[i++]; *EPJeblAV
a = temp; ?X+PNw|pf
} else { C1uV7t*\
data[k] = temp[j--]; t=\ ffpA
b = temp[j]; Mn 8| Knh
} 9JqT"zj
} ]*X z~Ox2
} o]eG+i6g]
19:1n]*X<
/** ?jU 3%"
* @param data OWp`Wat
* @param l E&ReQgBft
* @param i -nZDFC8y$
*/ `k7X|
private void insertSort(int[] data, int start, int len) { eF(oHn,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `[&%fTW+
} ZkBWVZb
} 50dx[v8
} pQxv_4
} Ml,in49
iX6*OEl/Q
堆排序： @,{Qa!A>l
O<J<)_W)
package org.rut.util.algorithm.support; ,va2:V
~uG/F?= Q:
import org.rut.util.algorithm.SortUtil; q#F+^)DD [
hT% >)71
/** ~wu\j][2
* @author treeroot 09=w
* @since 2006-2-2 _U o3_us
* @version 1.0 w^ X@PpP
*/ /vPr^Wv
public class HeapSort implements SortUtil.Sort{ ^SbxClUfw!
s)+] pxV0-
/* (non-Javadoc) e35")z~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %NcBq3
*/ braI MIQ`
public void sort(int[] data) { FzF#V=9lP
MaxHeap h=new MaxHeap(); %v0;1m
h.init(data); ";upu
for(int i=0;i h.remove(); xg4wtfAbS
System.arraycopy(h.queue,1,data,0,data.length); )Wk&c8|y
} /2cn`dR,
wauM|/KG
private static class MaxHeap{ D|2lBU
hP_{$c{4:g
void init(int[] data){ i&-g
this.queue=new int[data.length+1]; _z\qtl~3
for(int i=0;i queue[++size]=data; sRQ4pnnrn
fixUp(size); +.v+Opp,
} Pk6_1LV
} paUJq?Af
4O4}C#6(4
private int size=0; 8\+XtS
\SBAk h
private int[] queue; [KMS/'; ]
{>3w"(f7o
public int get() { Bw.?Me)mf|
return queue[1]; D7Ds*X`!l
} g(R!M0hdF
'X~CrgQl
public void remove() { 6&btAwvOHx
SortUtil.swap(queue,1,size--); >}r 1A
fixDown(1); lr[&*v?h
} gu1n0N`b
file://fixdown !N/?b^y
private void fixDown(int k) { 0IQ|`C.
int j; KcM+8W\
while ((j = k << 1) <= size) { K,!f7KKo
if (j < size %26amp;%26amp; queue[j] j++; [9Hrpo]tU:
if (queue[k]>queue[j]) file://不用交换 %htbEKWR
break; <U}25AR
SortUtil.swap(queue,j,k); KssIoP
k = j; Pu}PE-b
} 7'7o^> !
} ?Hbi[YD
private void fixUp(int k) { ,]4.|A_[Rq
while (k > 1) { U\q?tvn'J
int j = k >> 1; d3p;[;`
if (queue[j]>queue[k]) n*hRlL
break; MNX-D0`g
SortUtil.swap(queue,j,k); _:Ov-HIR
k = j; 0Hr)h{!F"
} Oe0dC9H
} (Li)@Cn%
UO'X"`
} zTze%
{/XU[rn
} 7mYBxE/
/?C6oj1
SortUtil： ~{D:vj4>
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package org.rut.util.algorithm; F5<GGEQb
_p| KaT``
import org.rut.util.algorithm.support.BubbleSort; CM+wkU ?,
import org.rut.util.algorithm.support.HeapSort; .-:6L2
import org.rut.util.algorithm.support.ImprovedMergeSort; {\kDu#18Ld
import org.rut.util.algorithm.support.ImprovedQuickSort; xKoNo^FF
import org.rut.util.algorithm.support.InsertSort; {6*{P!H
import org.rut.util.algorithm.support.MergeSort; u"zQh|
import org.rut.util.algorithm.support.QuickSort; BtP*R,>
import org.rut.util.algorithm.support.SelectionSort; [,qb) &_
import org.rut.util.algorithm.support.ShellSort; DO? bJ01
=e]Wt/AQ
/** ]K%D$x{+\
* @author treeroot Ay\!ohIS3
* @since 2006-2-2 Mp^U)S+
* @version 1.0 |9 4xRC
*/ 4\Cb4jq%/
public class SortUtil { RH<C:!F^
public final static int INSERT = 1; nb|"dK|
public final static int BUBBLE = 2; hN_,Vyf
public final static int SELECTION = 3; D 3}e{J8
public final static int SHELL = 4; |Vc:o_n7
public final static int QUICK = 5; 0'Qo eFKG
public final static int IMPROVED_QUICK = 6; 2 Xc,c*r
public final static int MERGE = 7; i{2rQy+
public final static int IMPROVED_MERGE = 8; ++0xa%:
public final static int HEAP = 9; l7GLN1#m
^i~'aq
public static void sort(int[] data) { (9D,Ukw
sort(data, IMPROVED_QUICK); 3yIC@>&y(8
} ,6a }l;lv
private static String[] name={ :6Sb3w5h
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" a<{+ JU5
}; kx3]A"]>'
f%Bmx{Ttq
private static Sort[] impl=new Sort[]{ Hy1f,D
new InsertSort(), ACxjY2
new BubbleSort(), QX393v!
new SelectionSort(), |h%fi-a:
new ShellSort(), ZBfB4<M9xS
new QuickSort(), zXg/.z]
new ImprovedQuickSort(), qbdv
new MergeSort(), UkBr4{+aE
new ImprovedMergeSort(), ;hp?wb
new HeapSort() ppM^&6x^
}; '^.}5be&
\)T4NN
public static String toString(int algorithm){ !Pb39[f
return name[algorithm-1]; 'D;'Pr]
} dKTUW<C
p uLQ_MNV
public static void sort(int[] data, int algorithm) { as| MB (
impl[algorithm-1].sort(data); j*;/Cah]k
} xkebel`%
g3uI1]QXLg
public static interface Sort { EYF]&+ 9
public void sort(int[] data); kT6EHuB
} })}-K7v1+
WD5ulm?91|
public static void swap(int[] data, int i, int j) { TJp0^&Q
int temp = data; :j0r~*z-
data = data[j]; nxh9'"th
data[j] = temp; ~WG#Zci-
} p![CH
} Y+I`XeY