[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; gxL5%:@
} HiVF<tN
int i1=l; |\Qr cf
int i2=mid+1; :2
for(int cur=l;cur<=r;cur++){ Po=)jkW
if(i1==mid+1) 0y|}}92:
data[cur]=temp[i2++]; Vk>aU3\c
else if(i2>r) 9j9A'Y9(
data[cur]=temp[i1++]; rWSw1(sAA
else if(temp[i1] data[cur]=temp[i1++]; VU)ywIs
else >#c]rk:
data[cur]=temp[i2++]; ,/JrQWgD
} xae}8E
} RI cA)I.
zneK)C8&q3
} GQ)hZt0
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改进后的归并排序: `<+D<x)(3
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package org.rut.util.algorithm.support; UGr7,+N&w
voV=}.(p
import org.rut.util.algorithm.SortUtil; js7J#b7
ILTd*f
/** I)DLnnQQ
* @author treeroot O,:ent|
* @since 2006-2-2 o_os;
* @version 1.0 &|Z:8]'P
*/ T4qbyui{
public class ImprovedMergeSort implements SortUtil.Sort { ugucq},[
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private static final int THRESHOLD = 10; Uj6R?E{Jt
F]SexP4:A
/* E}\^GNT
* (non-Javadoc) QT\S>}
* sStaTR{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $eRxCX?b2
*/ =^=9z'u"=
public void sort(int[] data) { xdp{y=,[
int[] temp=new int[data.length]; +<@7x16
mergeSort(data,temp,0,data.length-1); %E~4Ur
} 3(6i6 vV
PS(9?rX#+
private void mergeSort(int[] data, int[] temp, int l, int r) { 0Q%'vBX\`
int i, j, k; In=3#u ,M
int mid = (l + r) / 2; ZXHG2@E)
if (l == r) j:$2,?|5
return; xzIs,i}U
if ((mid - l) >= THRESHOLD) F!j@b!J8
mergeSort(data, temp, l, mid); r'pFHX
else D OPOzh
insertSort(data, l, mid - l + 1); kw|bEL9!u
if ((r - mid) > THRESHOLD) <hQ@]2w$
mergeSort(data, temp, mid + 1, r); \L6U}ZQ2V
else uZ%b6+(
insertSort(data, mid + 1, r - mid); 6"eGd"
Og"50-
for (i = l; i <= mid; i++) { ObMsncn
temp = data; #y}@FG
} #j iQa"
for (j = 1; j <= r - mid; j++) { c3i|q@ k
temp[r - j + 1] = data[j + mid]; e+4p__TmZ
} ^/mQo`[G
int a = temp[l]; LQNu]2
int b = temp[r]; m7^a4
for (i = l, j = r, k = l; k <= r; k++) { g|e^}voRM
if (a < b) { `=b*g24z[N
data[k] = temp[i++]; NZ9`8&93
a = temp; J'^BxN&
} else { SM![ yC
data[k] = temp[j--]; F)5QpDmqb
b = temp[j]; 1H-R-NNJ:
} RYS]b[-xZz
} (!DH'2I[
} 9v0.]
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/** @MAk/mb&
* @param data (Qq! u
* @param l oQWS$\Rr.
* @param i `k_5Pz\
*/ DV*8Mkzg
private void insertSort(int[] data, int start, int len) { Nr3td`;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %v :a
} pRUN[[L
} c{rX7+bN
} zO9|s}J8q
} WO^smCk
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堆排序： Y\sLwLLlG
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package org.rut.util.algorithm.support; w0^(jMQe^
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import org.rut.util.algorithm.SortUtil; Qf7]t-Kp
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/** =@gH$Q_1
* @author treeroot ?VS {,"X
* @since 2006-2-2 wC'KI8-
* @version 1.0 ZUAWSJ,s
*/ sB-c'`,w`
public class HeapSort implements SortUtil.Sort{ 0ydAdgD
eey <:n/Z
/* (non-Javadoc) yTkYPx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bN<c5
*/ Nd^9.6,JU
public void sort(int[] data) { '1=/G7g
MaxHeap h=new MaxHeap(); 0f;L!.eP
h.init(data); @*%Q,$
for(int i=0;i h.remove(); jr"yIC_
System.arraycopy(h.queue,1,data,0,data.length); <s]K~ Vo
} ,^:Zf|V
Xdq2.:\
private static class MaxHeap{ T1\Xz-1
}_@cqx:n^
void init(int[] data){ 6:ZqS~-
this.queue=new int[data.length+1]; #}:VZ2Z
for(int i=0;i queue[++size]=data; "g>uNtt~
fixUp(size); ( F0.lDZ
} sjWhtd[fgG
} 2"yzrwZ:
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private int size=0; n_.2B$JD
8[(c'rl|)|
private int[] queue; UFouIS#L
pb_mW;JVu
public int get() { q|=tt(}G
return queue[1]; %zb7M%dC6`
} &=X1kQG
QbxjfW"/+
public void remove() { 3vQ?vS|2
SortUtil.swap(queue,1,size--); hY-;Wfg
fixDown(1); |KplbU0iC
} TjgX' j
file://fixdown cS4e}\q,
private void fixDown(int k) { ogip#$A}3
int j; o=q N+-N
while ((j = k << 1) <= size) { {~b]6}O
if (j < size %26amp;%26amp; queue[j] j++; %q2dpzNW
if (queue[k]>queue[j]) file://不用交换 qqS-0U2
break; hKt AvTg
SortUtil.swap(queue,j,k); \dbpCZ
k = j; Vu^J'>X
} +qD4`aI
} o PR^Z pt
private void fixUp(int k) { H8Pil H
while (k > 1) { rAn''X6H
int j = k >> 1; r_FW)Fu^
if (queue[j]>queue[k]) 9]1-J5iO
break; RTHdL
SortUtil.swap(queue,j,k); &zb_8y,
k = j; +_ K7x5g
} F{bET
} ,#gA(B#
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} #++MoW}'g
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SortUtil： =WJ*$j(
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package org.rut.util.algorithm; .7+_ubj&,
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import org.rut.util.algorithm.support.BubbleSort; (aiE!c
import org.rut.util.algorithm.support.HeapSort; 42U3>
import org.rut.util.algorithm.support.ImprovedMergeSort; W%Br%VQJ
import org.rut.util.algorithm.support.ImprovedQuickSort; frc>0\
import org.rut.util.algorithm.support.InsertSort; E88_15'3D
import org.rut.util.algorithm.support.MergeSort; e_\4(4x
import org.rut.util.algorithm.support.QuickSort; 3/}=x<ui
import org.rut.util.algorithm.support.SelectionSort; L a0H
import org.rut.util.algorithm.support.ShellSort; NZi5rXN
- FA#hUK$
/** qB<D'h7
* @author treeroot WTY{sq\' o
* @since 2006-2-2 1,,o_e\nn3
* @version 1.0 o+/x8:
*/ TcO@q ]+S
public class SortUtil { k{y@&QNj
public final static int INSERT = 1; OHp 121
public final static int BUBBLE = 2; ra_`NsKF}
public final static int SELECTION = 3; fVb&=%e
public final static int SHELL = 4; g9GE0DbT`
public final static int QUICK = 5; ~Jmn?9 3
public final static int IMPROVED_QUICK = 6; I&Yu=v/_
public final static int MERGE = 7; 3::DURkjf
public final static int IMPROVED_MERGE = 8; w/h?, L|
public final static int HEAP = 9; } Yjic4?
xJ^Gtq Um
public static void sort(int[] data) { SobK<6
sort(data, IMPROVED_QUICK); Fg5>CppH
} {B\ar+9>
private static String[] name={ )q&uvfQ1(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?Xh=rx_
}; p`33`25
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private static Sort[] impl=new Sort[]{ t+q:8HNh
new InsertSort(), Q4CxtY
new BubbleSort(), q:J,xC_sF(
new SelectionSort(), -UUPhGC
new ShellSort(), @xSS`&b
new QuickSort(), kTc'k
new ImprovedQuickSort(), n8iejdA'
new MergeSort(), *oZBv4Vh
new ImprovedMergeSort(), _d %H;<_
new HeapSort() lwQI 9U[O2
}; 5a5I+* c
2+sNt6B2
public static String toString(int algorithm){ wKXKc\r
return name[algorithm-1]; KosAc'/ M
} vT\`0di~
;w}ZI<ou
public static void sort(int[] data, int algorithm) { K}&|lCsb
impl[algorithm-1].sort(data); \AoM'+
} iNd8M V
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public static interface Sort { 0K@s_C=n#
public void sort(int[] data); P]j{JL/g&
} M:Xswwq
iN<&
public static void swap(int[] data, int i, int j) { 7evE;KL
int temp = data; y5BNHweaRb
data = data[j]; 8iqx*8}
data[j] = temp; o_bj@X
} /DQoM@X
} 9_KUUA