[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; Q{miI N
} \.P#QVuQ
int i1=l; :w4N*lV-
int i2=mid+1; m?8o\|i,
for(int cur=l;cur<=r;cur++){ ;l < amB
if(i1==mid+1) *o(bB!q"c
data[cur]=temp[i2++]; g1l:k1\Ht
else if(i2>r) f^IB:e#j;
data[cur]=temp[i1++]; Q+_z*
else if(temp[i1] data[cur]=temp[i1++]; !u4eI0?R?
else t.bM]QU!1
data[cur]=temp[i2++]; ?hURNlR_Q
} *7L1SjZw
} G"Ey%Q2K
]xJ.OUJy
} /,$V/q+
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改进后的归并排序: |'x"+x
muFWFq&yP
package org.rut.util.algorithm.support; iHQ$L# 7
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import org.rut.util.algorithm.SortUtil; *#?9@0b@
EW`WFBjj
/** -0NkAQrg
* @author treeroot )?LZg<<
* @since 2006-2-2 wCj)@3F
* @version 1.0 Lso%1M
*/ mW,b#'hy
public class ImprovedMergeSort implements SortUtil.Sort { Aq>?G+
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private static final int THRESHOLD = 10; iorQ/(
y T&#k1
/* z 61Fq
* (non-Javadoc) e9QjRx
* {QOy' 8/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A#i[Us|
*/ #2Iw%H2q&
public void sort(int[] data) { aQ&K a
int[] temp=new int[data.length]; EEx:Xk%5hX
mergeSort(data,temp,0,data.length-1); ztp2j%'
} @s,kx.S
Y\4B2:Qd9
private void mergeSort(int[] data, int[] temp, int l, int r) { )N\BC
int i, j, k; /paZJ}Pr.
int mid = (l + r) / 2; )%8st'
if (l == r) .O&YdUo
return; uy<b5.!-
if ((mid - l) >= THRESHOLD) iYlkc
mergeSort(data, temp, l, mid); 2zX9c<S=5
else C!6D /S
insertSort(data, l, mid - l + 1); |=:hUp Jp
if ((r - mid) > THRESHOLD) r;wm`(e
mergeSort(data, temp, mid + 1, r); Z:2%gU&W
else )?6%d
insertSort(data, mid + 1, r - mid); ={o)82LV
lB#7j
for (i = l; i <= mid; i++) { 5as5{"l
temp = data; 'cc{sjG
} oMoco tQ;$
for (j = 1; j <= r - mid; j++) { O]!o|w(
temp[r - j + 1] = data[j + mid]; 'UuHyC2Ha3
} IQ xi@7%&
int a = temp[l]; D)Jac@,0
int b = temp[r]; <P]%{msGH
for (i = l, j = r, k = l; k <= r; k++) { _U^G*EqL*
if (a < b) { vCOtED*<
data[k] = temp[i++]; 2gEF$?+q?
a = temp; ,,ML^ey
} else { Re*~C:
data[k] = temp[j--]; 4 DV,f2:R4
b = temp[j]; K7i@7
} 2dbn~j0
} ,<s:* k
} aH_FBY
k_gl$`A
/** 79h'sp6;
* @param data [N"=rY4G
* @param l ph%t #R
* @param i mDuS-2G=D
*/ LE?sAN
private void insertSort(int[] data, int start, int len) { [b~+VeP+p4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8cURYg6v
} p$*P@qm
} ~I~lb/
} F9A5}/\
} =&DuQvN,
sJ5#T iX
堆排序： s;sr(34
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package org.rut.util.algorithm.support; >?ec"P%vS/
J'k^(ZZ
import org.rut.util.algorithm.SortUtil; 8VC%4+.FF
tOo\s&j
/** ogJ';i/o
* @author treeroot ([7XtG/?
* @since 2006-2-2 ,8!'jE[d
* @version 1.0 = U[$i"+
*/ H%i [;
public class HeapSort implements SortUtil.Sort{ u Qg$hS
8CH9&N5W5t
/* (non-Javadoc) 6#a82_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C+dz0u3s
*/ 'X?Iho
public void sort(int[] data) { JLg/fB3%
MaxHeap h=new MaxHeap(); OAgZeK$
h.init(data); )XoMOz
for(int i=0;i h.remove(); k3]qpWKj
System.arraycopy(h.queue,1,data,0,data.length); Q"3gvIyc
} HLL=.:P
=CjWPZShV
private static class MaxHeap{ ~w.y9)",
iDltN]zS
void init(int[] data){ ^E~1%Md.
this.queue=new int[data.length+1]; J-5kvQi8
for(int i=0;i queue[++size]=data; e-VGJxR
fixUp(size); 7=&+0@R#/d
} ;*=7>"o'`
} K%u>'W
v`p@djM
private int size=0; +Z]}ce u"
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private int[] queue; w>'3}o(nY
ZQ'|B
public int get() { hb9HVj
return queue[1]; 0vMKyT3 c
} SEE:v+3|
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public void remove() { as!P`*@
SortUtil.swap(queue,1,size--); GXRW"4eF5
fixDown(1); sN) xNz
} (.5Ft^3W
file://fixdown <vb7X
private void fixDown(int k) { uWP0(6 %
int j; >ZU)bnndA
while ((j = k << 1) <= size) { D<WGau2H
if (j < size %26amp;%26amp; queue[j] j++; Y3-f68*(
if (queue[k]>queue[j]) file://不用交换 xZ SDA8kS
break; <)Y jVGG
SortUtil.swap(queue,j,k); A.RG8"
k = j; `\/\C[Gg
} I$XwM
} Tl+PRR6D*
private void fixUp(int k) { @xk;]H80
while (k > 1) { t[AA=
int j = k >> 1; .z*}%,G
if (queue[j]>queue[k]) 0WyOORuK
break; u<+"#.[2v~
SortUtil.swap(queue,j,k); i<q_d7-W'
k = j; /_yAd,^-+
} h<n2pz}
} kUr/*an
R38 \&F
} 8m#y>`
$I<\Yuy-M9
} D u_;!E
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SortUtil： (`R heEg@f
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package org.rut.util.algorithm; }FX:sa?5
fUOQ(BGp
import org.rut.util.algorithm.support.BubbleSort; HYZp=*eb
import org.rut.util.algorithm.support.HeapSort; S>Gb Jt(]
import org.rut.util.algorithm.support.ImprovedMergeSort; z f>(Y7M
import org.rut.util.algorithm.support.ImprovedQuickSort; o|_9%o52'
import org.rut.util.algorithm.support.InsertSort; _BvGEM`o
import org.rut.util.algorithm.support.MergeSort; $bN_0s0:'
import org.rut.util.algorithm.support.QuickSort; IGlM} ?x
import org.rut.util.algorithm.support.SelectionSort; }Nma %6PfV
import org.rut.util.algorithm.support.ShellSort; EoS6t
g!)*CP#;
/** 5,\|XQA5!
* @author treeroot PWO5R]
* @since 2006-2-2 Q9Go}}n
* @version 1.0 m6Qm }""
*/ Z|A+\#'
public class SortUtil { 2(P<TP._E
public final static int INSERT = 1; LKZv#b[h
public final static int BUBBLE = 2; p}Bh
public final static int SELECTION = 3; g!z &lQnZ
public final static int SHELL = 4; ,L-V?B(UQ
public final static int QUICK = 5; pIKfTkSqH
public final static int IMPROVED_QUICK = 6; E `V?Io
public final static int MERGE = 7; ll?Qg%V[t
public final static int IMPROVED_MERGE = 8; Nk1p)V SC
public final static int HEAP = 9; PO|gM8E1x?
cE?p~fq<
public static void sort(int[] data) { r[#*..Y
sort(data, IMPROVED_QUICK); ?KE:KV[Y
} @ 0/EKWF
private static String[] name={ f>m! }F:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #IJ6pg>K
}; X+/^s)
\KKE&3=
private static Sort[] impl=new Sort[]{ ~y/qm [P
new InsertSort(), "#h/sAIs
new BubbleSort(), `1#Z9&bO
new SelectionSort(), 9"}5jq4*
new ShellSort(), :W+%jn
new QuickSort(), )q[Wzx_ j<
new ImprovedQuickSort(), s%A?B8,
new MergeSort(), aPX'CG4m
new ImprovedMergeSort(), 14(ct
new HeapSort() hE'>8{
}; x Vw1
OU*skc>
public static String toString(int algorithm){ 0%yPuY>
return name[algorithm-1]; w BoP&l
} ~b%dBn]n>
Oe;1f#`5
public static void sort(int[] data, int algorithm) { 4.>y[_vu
impl[algorithm-1].sort(data); 7dOpJjv?)
} g\*2w @
<<-BQ l~
public static interface Sort { (%9J(4
public void sort(int[] data); bP%X^q~]A
} ucJ8l(?Qc
L^2wEF
public static void swap(int[] data, int i, int j) { hI*6f3Vn(n
int temp = data; 'u_j5
data = data[j]; 4~hP25q
data[j] = temp; ={jj'X9
} gb}ov**
} }^*`&Lh