[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; PMZ*ECIJU
} qDPl( WXb
int i1=l; 91|~KR)
int i2=mid+1; jwO7r0?\`G
for(int cur=l;cur<=r;cur++){ #B@*-
if(i1==mid+1) * TByAa{
data[cur]=temp[i2++]; kb[+II
else if(i2>r) ,+!|~1
data[cur]=temp[i1++]; qF4=MQm\aE
else if(temp[i1] data[cur]=temp[i1++]; %o_CD>yD
else ;\ gat)0n%
data[cur]=temp[i2++]; rqEP!S^
} "O<TNSbrC
} !m?W+z~J
cv9-ZOxJ
} Xp~O?2:3l
TlpQ9T
改进后的归并排序: J~lKN <w
lin
package org.rut.util.algorithm.support; O5dBI_
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import org.rut.util.algorithm.SortUtil; qbKcI+)47
YJ{_%z|U
/** q],/%W
* @author treeroot # 66vkf*
* @since 2006-2-2 j1K?QH=e#{
* @version 1.0 >=YQxm}GJ
*/ i+~H~k}"X
public class ImprovedMergeSort implements SortUtil.Sort { @T)>akEOt
YzYj/,?r
private static final int THRESHOLD = 10; =|qYaXjT$
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/* 7%yP5c B
* (non-Javadoc) gPF5|% 3)
* hEAP,)>F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )]{&
*/ iJzW3%E
public void sort(int[] data) { c:,K{ZR
int[] temp=new int[data.length]; Eg0qY\'
mergeSort(data,temp,0,data.length-1); vnH[D)`@
} 6&L8{P
crU]P $a
private void mergeSort(int[] data, int[] temp, int l, int r) { :JCe,1!3@
int i, j, k; ]lA.?
int mid = (l + r) / 2; .1h1J
if (l == r) M3YC@(N% k
return; 8g6G},Y0
if ((mid - l) >= THRESHOLD) pF7S("#R
mergeSort(data, temp, l, mid); E[tEW0ub
else #$v,.Yk
insertSort(data, l, mid - l + 1); yOE N*^6
if ((r - mid) > THRESHOLD) ^vc#)tm5p
mergeSort(data, temp, mid + 1, r); L lVE5f?
else 6]Ri$V&"
insertSort(data, mid + 1, r - mid); v,Yz\onB^
nACKSsWqI
for (i = l; i <= mid; i++) { ju(QSZ|;
temp = data; `:5W1D(
} y])z,#%ED
for (j = 1; j <= r - mid; j++) { U_AmRiy
temp[r - j + 1] = data[j + mid]; :{x
} o&kgRv[
int a = temp[l]; z5 :53,`D'
int b = temp[r]; xB,(!0{`
for (i = l, j = r, k = l; k <= r; k++) { $<d3g:
if (a < b) { WGI4DzKa
data[k] = temp[i++]; )Qc>NF0
a = temp; v Yw$m#@
} else { h;t5v6["
data[k] = temp[j--]; Kr74|W=
b = temp[j]; rB.LG'GG]
} HKYJgx
} "U iv[8B
} \-RVPa8k
kcZz WG|n
/** 5 DvD
* @param data FWuk@t[<O
* @param l i`EG80\[Z
* @param i qh/}/Sl;
*/ H6i;MQ
private void insertSort(int[] data, int start, int len) { ZvkBF9d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {WN??eys,
} <9aa@c57
} CYN")J8V
} _rfGn,@BH
} 3<ry/{#%
w[s}#Q
堆排序： lvIdYf$?
@1+({u#B
package org.rut.util.algorithm.support; OM#eJ,MH<)
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import org.rut.util.algorithm.SortUtil; 'v_VyK*w
5hE mXZ%
/** fz`\-"f]
* @author treeroot U-lN-/=l6
* @since 2006-2-2 h|XLL|:
* @version 1.0 (-esUOB.
*/ ]B9Ut&mF;
public class HeapSort implements SortUtil.Sort{ #mH4\s
Oh/2$72
/* (non-Javadoc) F@jyTIS^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Oo8"s+G
*/ d(;Qe}ok>
public void sort(int[] data) { DT>Giic
MaxHeap h=new MaxHeap(); aDVBi: _
h.init(data); p^?]xD(
for(int i=0;i h.remove(); jt4c*0z
System.arraycopy(h.queue,1,data,0,data.length); <hmRr
} KcF#c_f
Qj(|uGqm3
private static class MaxHeap{ FAF+}
lb[\Lzdvmu
void init(int[] data){ _.K<#S
this.queue=new int[data.length+1]; i2m+s;
for(int i=0;i queue[++size]=data; xGo,x+U*
fixUp(size); <ly.l]g
} Evb %<`gd
} ewp&QH4
Nt P=m @
private int size=0; FOD_m&+
?;?$\b=
private int[] queue; z.]
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public int get() { 2^T`> ?{X
return queue[1]; KImazS^
} zua=E2
jY ~7-
public void remove() { sboX<
SortUtil.swap(queue,1,size--); %TA@-tK=
fixDown(1); o~={M7m
} $C~OV@I
file://fixdown x/xd
private void fixDown(int k) { 9ZXEy }q57
int j; 3ew`e"s
while ((j = k << 1) <= size) { ;-@v1I;
if (j < size %26amp;%26amp; queue[j] j++; hF7#i_UN<
if (queue[k]>queue[j]) file://不用交换 4/M~#
break; 2N[S*#~*e
SortUtil.swap(queue,j,k); I,wgu:}P#
k = j; <-K'9ut,
} @G:aW\Z
} N!W2O>VS
private void fixUp(int k) { 6A*k
while (k > 1) { vILq5iR
int j = k >> 1; 3v7*@(y
if (queue[j]>queue[k]) @>SirYh
break; o@blvW<v7
SortUtil.swap(queue,j,k); CJ#1j>
k = j; ^E`SR6_cmj
} 9#ZR0t.cY
} Ph|\%P`>%
cuW&X9\m,
} P*zOt]T
X!ad~bt
} $l<(*,,l
kqyPb$Wy
SortUtil： tv8}O([
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package org.rut.util.algorithm; ?^z.WQ|f@
H:>i:\J/M9
import org.rut.util.algorithm.support.BubbleSort; Kzz]ZO*3
import org.rut.util.algorithm.support.HeapSort; Hj^_Cp]@*
import org.rut.util.algorithm.support.ImprovedMergeSort; tf_<w?~
import org.rut.util.algorithm.support.ImprovedQuickSort; J'no{3Ktz
import org.rut.util.algorithm.support.InsertSort; d-sK{ZC"y
import org.rut.util.algorithm.support.MergeSort; T`gR&n<D
import org.rut.util.algorithm.support.QuickSort; XlHt(d0h
import org.rut.util.algorithm.support.SelectionSort; 1T@#gE["Ic
import org.rut.util.algorithm.support.ShellSort; o2#_CdU
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/** M5>cYVG
* @author treeroot t?<pyw $
* @since 2006-2-2 7"0l>0 \
* @version 1.0 k x26nDT(
*/ {e'V^l.v
public class SortUtil { +ZK12D}
public final static int INSERT = 1; lay)I11->
public final static int BUBBLE = 2; ,2?Sua/LD
public final static int SELECTION = 3; )S2GPn7
public final static int SHELL = 4; 7U_OUUg
public final static int QUICK = 5; |SfmQ;
public final static int IMPROVED_QUICK = 6; 9et%Hn.K'
public final static int MERGE = 7; N5\]VCX
public final static int IMPROVED_MERGE = 8; @XRN#_{
public final static int HEAP = 9; iR(jCD?) Y
J52- qR/
public static void sort(int[] data) { n~|sMpd,M1
sort(data, IMPROVED_QUICK); 01/yog
} _BP!{~&;
private static String[] name={ m"y_@Jk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L?slIGp%-
}; -U#e
TaI72"8
private static Sort[] impl=new Sort[]{ #2\ 0#HN
new InsertSort(), xpjv@P
new BubbleSort(), aHdXlmL
new SelectionSort(), 3(n+5~{e
new ShellSort(), <1(j&U
new QuickSort(), s2rwFj8 |
new ImprovedQuickSort(), qkk!1W
new MergeSort(), ?z$^4u3
new ImprovedMergeSort(), IGC:zZ~z
new HeapSort() Gl@}b\TB
}; OELh6R
~M!s0jT
public static String toString(int algorithm){ ]= nM|e
return name[algorithm-1]; TCI%Ox|a
} Td"_To@jd
"cVJqW
public static void sort(int[] data, int algorithm) { K~DQUmU@
impl[algorithm-1].sort(data); "ke>O'
} g=5vnY
XV|u!'Ey
public static interface Sort { _2N7E#m"S
public void sort(int[] data); "Smek#l
} {i09e1
R%\K<#^\
public static void swap(int[] data, int i, int j) { ^< o"3?
int temp = data; z;#]xCV
data = data[j]; #'&&&_Hu3
data[j] = temp; eNEMyv5{w4
} 1U(P0$C
} ] eO25,6